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Series 4000 - Mensor Corporation

1. 3 2 Remote Responses lees 3 3 Command Conventions 0 200 I 3 4 Command String Format K K K 3 5 Return String Format 3 5 Commands i ses aee a 3 o ov ey P o4 Yu Rs 3 6 3 14 RS 232 RS 485 Differences ee K K 3 14 4 SECONDARY OUTPUTS General us 15 gente a ER ek at di ure dod O uses us does 4 1 4 to 20 mA Output Model 4030 4 1 Current Alarms lees 4 2 RS 232 Commands for Current Output 4 2 Analog Output Models 4X4X K K K 4 3 Serial Commands for Analog Output 4 3 Parallel Port Models 4X10 4X11 and 4X50 4 4 Model 4X10 Two s Complement Binary Output 4 5 Model 4X11 Binary Output 0 4 5 Model 4X50 Binary Coded Decimal BCD 4 5 5 MAINTENANCE Beyond the Warranty K K K K KK KK KH 5 1 Calibration Services K K K KEK K K K K KK 5 1 6 CALIBRATION Environment 4 29 ow x eo a dye 6 1 Equipment noz 00d elas ee PEERS eee 6 1 Pressure Standard i as SE PM NATUS a e 6 2 Calibration Medium 6 2 Calibration Processes lll K K 6 2 viii January 2002 MENSOR CORP SERIES 4000 DPT TABLE OF CONTENTS Digital Output Calibration ccs 6 4 Correction Value Query len 6 4
2. 1 3 Analog Voltage Output Models 4X40 4X41 4X42 4X43 1 3 Parallel Output Models 4X10 4X11 4X50 1 4 Circuit Boards ses esad s t artna e o e e n W 1 4 A D Circuit Board 202 0204 1 4 Micro Computer Circuit Board 1 4 I O Circuit Board Models 4X10 4X11 and 4X50 1 5 Analog Output Circuit Board Model 4X4X 1 6 Current Output Circuit Board Model 4030 1 7 2 INSTALLATION Configuration 4 ll el eA 2 1 Mounting e rud aeu dise Vu Re exe A S eu en 2 1 Pressure Connections 5 2 2 Electrical Connections 2 2 2 2 Connector Jl Wiring c 2 2 Barrier Strip TB1 Wiring Model 4030 2 3 Serial Port J2 Models 40XX 2 4 RS 232 Serial Port Connections 2 4 RS 232 Cable Models 40XX 2 5 RS 485 Serial Port Models 41XX 2 6 MENSORO CORP January 2002 vii TABLE OF CONTENTS SERIES 4000 DPT RS 485 Cable Models 41XX 2 6 Parallel Port Models 4X10 4X11 and 4X50 2 8 Op ration 5 gc e A a ee a 2 9 3 SERIAL COMMUNICATIONS General ti st Xwa Gi s n A Ke wa lb d0 4 ELS S 3 1 RS 485 Serial Communication Models 41XX 3 1 Serial Port Configuration KK K K K K K 3 1 DET AdOreSS s lt b aa e a a ea uL You A VO DA 3 2 Global Address Operator
3. 0u d2 3 5 1 Measurement Units See Units Media Hydraulic 2 2 m n 20 C ode Demo ae ds Ho d Deco cde es han Ge ad 6 2 Media Pressure i Qo yo e eee x xe a 7 5 Mensor Background te ix dee A ele ne exe Rr EU UR Ky E EU o E EU Ew Eh v Micro Computer Circuit Board KK KK KEKE KEKE KE KEKE KK KEK KK KK KK KH 1 4 1 7 Models ui Law Aya kl QE a X Wa dey E A Eur d E Moles Sa wa fep rts 1 2 4 1 Mounting 2456 duces UNE E Uu YE Te a ey E E ge y ETE TEYE Mer UNE TRE EET 2 1 7 2 Panel Mount Kit Option K K K K K K K KEK K K KEK K K KK KK KT 2 1 8 1 8 2 Multi drop Wiring 3 AW A xa SS ugue RAUS GIRO AE I Me Z a d R I AS se 2 5 Operating Environment e 7 6 Operation A e ue e Pee E A DA SO era f ta T 2 9 Options and Accessories J ah a lk kal AL k ah d ark uz an dl La l a 8 1 8 2 Electrical Connectors 5 4 02 0 a a ded A AA 8 1 Panel Mount Kits o xeyo o Pee Pa Di ed a s 8 1 Relief Valves i 5 m woke Bol e Be we osque Rho ege dis Beta atate 8 1 Orientation Effects coi da rd XR E doce a ARES Rog 2 1 7 5 Outline DPT 1 rte I ae RE d Rm IR al Ah UU GA Wee dde s 1 3 7 3 OutpHs ode a x wo m Wow sep ove da NUI usw ae oa e 1 1 1 4 4 1 4 5 7 6 7 8 ZLt9o 20 nA cbe o BA eh A Senha aie ok ud pde ef ur 4 1 Analoge rh Be a P n qe S e SUA ba AA des ied 7 7 7 8 Analog Voltage o uo deu po ts Lue rue a o dr ee
4. Occasional adjustment of the zero offset or the full scale span of the transducer are normal requirements These adjustments are made with commands trans mitted over the serial bus as explained in Section 6 Calibration That same section also recommends periodic recalibration BEYOND THE WARRANTY Take advantage of Mensor s expert product care Mensor Corporation provides complete maintenance and calibration services available for a nominal fee Our service staff is knowledgeable in the innermost details of all of our instruments We maintain units that are in operation in many different industries and in a variety of applications and by users with a wide range of requirements Many of these instruments have been in service for over twenty years and continue to produce excellent results Returning your instrument to Mensor for service benefits you in several ways a Our intimate knowledge of the instrument assures you that it will receive expert care b In many cases we can recommend for your consideration upgrading to the latest enhancements c Servicing our own instruments which are used in real world applications keeps us informed as to the most frequent services required We use this knowledge in our continuing effort to design better and more robust instruments CALIBRATION SERVICES In addition to servicing our own products Mensor can perform a complete pressure calibration service up to 18 000 psi for all of your pr
5. 4X50 Figure 1 2 Block Diagram Parallel Output MENSOR CORP January 2002 1 5 INTRODUCTION SERIES 4000 DPT Analog Output Circuit Board Model 4X4X The optional Analog Output circuit board supplies a DC voltage output that is directly proportional to the pressure input This analog signal is available in several voltage ranges as shown in Table 1 1 Models The Analog board also supports the zero and span adjustment potentiometers for the analog signal See figure 1 3 l l Ji A D PCB 5 VDC 5 12V 9 500 VDC fee Conv Gnd Isolation nput P e Tur cce SENSOR Ado npu 12 5V Oli Converter 7 TI A D Signal INTFC Voltage BUS From Analog PCB is J2 JP2 MICRO COMPUTER Serial i PCB Bus AC PCB Analog Voltage EXPANSION Signal To J1 BUS ANALOG OUT OPTION PCB HD Models 4X40 no 4X43 Figure 1 3 Block Diagram Analog Output 1 6 January 2002 MENSOR CORP SERIES 4000 DPT INTRODUCTION Current Output Circuit Board Model 4030 The optional Current Output circuit board supplies a 4 to 20 mA signal to an external load connected to pins 3 and 4 of the barrier strip The current through the load is proportional to the pressure applied to the pressure port of the DPT A 4 mA output represents the minimum pressure and a 20 mA output represents the maximum pressure of the
6. PRECISION INSTRUMENTS SYSTEMS SERIES 4000 USER S MANUAL PN 0014461001 M 14461 M Jan 2002 Series 4000 DIGITAL PRESSURE TRANSDUCER CODE MENSOR CORPORATION 201 BARNES DRIVE Mabel SAN MARCOS TEXAS 78666 512 396 4200 FAX 512 396 1820 WEB SITE http www mensor com SN VERSION PREFACE SERIES 4000 DPT WARRANTY All products manufactured by Mensor Corporation are warranted to be free of defects in workmanship and materials for a period of one year from the date of shipment No other express warranty is given and no affirmation of Seller by words or actions shall constitute a warranty SELLER DISCLAIMS ANY IM PLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PAR TICULAR PURPOSES WHATSOEVER If any defect in workmanship or material should develop under conditions of normal use and service within the warranty period repairs will be made at no charge to the original purchaser upon delivery ofthe product s to the factory shipping charges prepaid If inspection by Mensor Corporation or its authorized representative reveals that the product was dam aged by accident alteration misuse abuse faulty installation or other causes beyond the control of Mensor Corporation this warranty does not apply The judgment of Mensor Corporation will be final as to all matters concerning condition of the product the cause and nature of a defect and the necessity or manner of repair Service repairs or disa
7. 2 1 Surface Mount Pattern 2 1 2 2 Connector Jl Wiring 2 2 2 a 2 2 2 9 TBICWIEIBE 5 una n at Gu WA ee a eh vo 2 3 2 4 J2 pinouts for RS 232 KE KEK K KEK K K K K K KK 2 4 2 5 RS 232 Multi Drop Wiring 2 5 2 6 J2 pinouts for RS 485 K K 2 6 2 7 Two wire RS 485 Cabling 32 2 7 2 8 Four Wire RS 485 Cabling J2 2 7 2 9 J3 Parallel Port Connector 2 8 4 1 Model 4030 Electrical End 4 1 6 1 Calibration Setup K K K K KK KT 6 3 7 1 DPT Outline and Dimensions Surface Mount 7 3 8 1 PanelMountDPT 0 48 8 2 8 2 Cutout Dimensions for a Panel Mounted DPT 8 2 9 1 Head Pressure Calculation 9 5 10 1 Pressure Relationships 10 4 Tables ELS Models 22 5 3m G r b ra 35 0 Ue aeg de 4 1 2 2 1 J3PinFunctions KEK KK K K KK 2 8 3 1 RS 232 and RS 485 Differences 3 14 4 1 Type of Secondary Output by Model Number 4 1 6 1 ANA ZERO Adjustments Results 6 10 7 1 Power InputtoJl 7 4 7 2 Overpressure Rating of Pressure Port 7 4 7 3 Analog Output Adjustment Ranges 7 7 8 1 Additional Mating Connectors 8 1 9 1 Conversion Fa
8. The orientation of the instrument represented by its angles of inclination to three orthogonal axes Attitude Error The error due to the orientation of the sensor relative to the direction in which gravity acts upon the sensor Barometric Pressure Absolute atmospheric pressure at the point of measurement normally stated in terms of the height of a column of mercury See also Pressure Relationships Calibration A test during which known values of pressure are applied to the instrument and corresponding output readings are recorded under specified conditions Calibration Curve A graphical representation of the calibration points Calibration Cycle The application of known values of pressure and recording of corresponding output readings over a full or specified portion of the range of an instrument in an ascending and descending direction Calibration Record A record of the measured relationship of the instrument output to the applied pressure over the instrument range MENSORO CORP January 2002 10 1 GLOSSARY SERIES 4000 DPT Calibration Traceability The relationship of an instrument calibration through a specified step by step process to national standards or nationally accepted measurement systems via an unbroken chain of comparisons Calibration Uncertainty The maximum calculated error in the output values shown in a calibration record due to causes not attributable to the instrument being calibrated Compensatio
9. To further assure stability and accuracy excessive motor or machinery vibration of the mounting surface should be avoided Your DPT can be set up on a table top in any orientation There are four mounting holes in the transducer end plates arranged in the pattern shown in figure 2 1 These holes can be used to surface mount the transducer A panel mount DPT option is available This option provides for mounting the transducer through a panel cutout such that the pressure port end is exposed More information is provided under Panel Mount Kit in the Options and Accessories section of the manual 4 710 11 96 cm 0 188 0 48 cm Wes 2 145 5 145 cm 0 156 Dia 0 40 cm 4 PLACES Figure 2 1 Surface Mount Pattern MENSOR CORP January 2002 2 1 INSTALLATION SERIES 4000 DPT PRESSURE CONNECTIONS The pressure to be measured is applied to the PRESS port on one end of the DPT This port requires a tube fitting boss with an o ring seal per MS33656 7 16 20 SAE Some ranges of DPTs also include a REF Reference pressure port If there is a REF port it will be open to atmosphere and will accept the same type fitting as the PRESS port A female 1 8 inch adapter fitting for each existing port is provided with each transducer The pressure connections can be made to these adapters with the proper mating hardware We recommend the use of either Loctite Hydraulic Sealant or fresh teflon tape on the threads of the ma
10. Up to 32 DPTs can be connected in parallel to a single RS 485 host without a repeater but each DPT must have a unique address Terminating resistors Rt are recommended on each pair of signal wires at the far ends of the RS 485 cable Resistor values are selected to match the charac teristic impedance of the transmission line typically 100 to 120 ohms The cable manufacturer s data sheet should specify the cable impedance Notice in figures 2 7 and 2 8 that each DPT in the system requires two external resistors a series resistor and a shunt resistor to ground NOTE The equivalent shunt and series resistors shown on the host end may or may not be included on the internal RS 485 serial board January 2002 MENSORO CORP SERIES 4000 DPT INSTALLATION 4 000 ft max End DPT Rt S e m To case 177 gt NOTES 1 All resistors are 1 2 watt approximately 100 ohm 2 Rt Terminating resistors only at two ends 2 places 3 Connectors are male shown from the wired end 177 o e al 2 1 To case Figure 2 7 Two wire RS 485 Cabling J2 Host 4 000 ft max End DPT RS 7 TD A e 3 E TD B e 3 To case 7 177 1 E NOTES 1 All resistors are 1 2 watt approximately 100 ohm 2 Rt Terminating resistors only at two ends 4 places 3 Connectors are male shown fr
11. establishes a proof of performance over time and can reveal problems should large or sudden shifts occur ENVIRONMENT The DPT should be calibrated at the same ambient temperature as its normal operating environment This temperature should be stable and within the specified calibration range In addition for maximum accuracy the DPT should be at rest on a stable platform which is free of vibration and shock and should be oriented similar to its final installation attitude EQUIPMENT The following equipment is needed to calibrate a gauge or differential DPT see figure 6 1 1 A host computer with a serial port to match the DPT RS 232 or RS 485 software to run the Series 4000 transducer and an appropriate cable 2 A pressure source dry nitrogen or instrument air with a line pressure regulator to cover the full scale pressure range of the DPT 3 A hand operated variable volume pressure vernier volume controller MENSOR CORP January 2002 6 1 CALIBRATION SERIES 4000 DPT 4 A metering valve and two isolating valves for Vent and Supply Pressure 5 A pressure calibration standard 6 Tubing and fittings adequate for the pressure range Additional equipment is required to calibrate an absolute DPT see figure 6 1 These additional items are 7 A vacuum pump capable of pumping down to 300 millitorr 8 A diaphragm type vacuum gauge to measure pressures down to 300 millitorr 9 One additional valve to is
12. sending a global query to a setup of ten transducers will return eleven lines of responses 3 2 January 2002 MENSOR CORP SERIES 4000 DPT SERIAL COMMUNICATIONS Example of a global operator query to a single DPT 2 f Returns lt If gt 1 0 0039 lt cr gt lt lIf gt If a global address operator is followed by a message which is not recognized by an RS 232 DPT the message will still echo but then each transducer will issue an unknown command error message REMOTE RESPONSES Remote responses are the data strings that are output by the transducer in response to queries from the host computer Remote responses always begin with followed by the address of the respondent The address field is followed by a SPACE or an E SPACE normal E Error condition The next field contains the response value s multiple values are separated by commas Please note commands that include the global address operator will echo back to the host computer where it will prefix the response The response terminates with a carriage return and a linefeed MENSOR CORP January 2002 3 3 SERIAL COMMUNICATIONS SERIES 4000 DPT Command Conventions 3 4 In the following examples given under Commands below the full command word is shown in all capital letters Other conventions used throughout the manual are RS 232 Start of Message character address is the next character RS 485 Start of Messag
13. with full scale pressure applied 2 On Model 4X43 the zero pot is adjusted at or near 1 volt with positive full scale pressure applied and the span pot is adjusted at or near 1 volt with negative full scale pressure applied Monotonicity 16 bits output is monotonic if it either increases or remains constant but never decreases for increasing pressure stimulus MENSOR CORP January 2002 7 7 SPECIFICATIONS SERIES 4000 DPT Output Current 5 mA maximum Broad Band Noise 150 mV peak to peak Resolution 16 bits 0 0015 FS Update Rate 7 6 readings per second with RS 232 not in use Parallel Output Models 4X10 4X11 and 4X50 Pressure value is a ratio of the total counts over the full scale pressure range per the schedules shown below under the individual models The pressure data as counts is available continuously through the output port and is updated auto matically when the BUSY bit is high All outputs are TTL positive logic and will drive one standard TTL load The optional parallel binary output is available in three different formats Each format has its own model number and its own resolution as stated below Two s Complement Binary Output Model 4X10 The two s complement format is used for bi directional pressure measurement where both positive and negative pressures will be measured from a zero reference pressure To accomplish this the parallel output uses 0 to 32767 counts 15 binary bits propor
14. 135 275 00 85 00 185 365 00 2 22 36 96 80 30 00 86 186 80 57 78 136 276 80 85 56 186 366 80 2 78 37 98 60 30 56 87 188 60 58 33 137 278 60 86 11 187 368 60 3 33 38 100 40 31 11 88 190 40 58 89 138 280 40 86 67 188 370 40 3 89 39 102 20 31 67 89 192 20 59 44 139 282 20 87 22 189 372 20 4 44 40 104 00 32 22 90 194 00 60 00 140 284 00 87 78 190 374 00 5 00 41 105 80 32 78 91 295 80 60 56 141 285 80 88 33 1911 375 80 5 56 42 107 60 33 33 92 97 60 61 11 142 287 60 88 89 192 377 60 6 11 43 109 40 33 89 93 199 40 61 67 143 289 40 89 44 193 379 40 6 67 44 111 20 34 44 94 201 20 62 22 144 291 20 90 00 194 381 20 7 22 45 113 00 35 00 95 203 00 62 78 1145 293 00 90 56 1195 383 00 7 78 46 114 80 35 56 96 204 80 63 33 146 294 80 91 11 196 384 80 8 33 47 116 60 36 11 97 206 60 63 89 147 296 60 91 67 1197 386 60 8 89 48 118 40 36 67 98 208 40 64 44 148 298 40 92 22 1198 388 40 9 44 49 120 20 37 22 99 210 20 65 00 149 300 20 92 78 199 390 20 MENSOR CORP January 2002 9 3 APPENDIX SERIES 4000 DPT HEAD PRESSURE CORRECTION The accuracy of pressure measurement depends on several factors one of which is the consideration of the head pressure in the system The pressure medium whether a gas or liquid can cause an error in the measurement if not considered In some cases the offset may be insignificant and it may be ignored The following information provi
15. 4 4 a ka a 45 dual ye a Lal a e ey doy os 1 1 Installation a 42 3924 20301 A04 RAE alae Pe A aA 2 4 2 1 2 10 Configuration a pac m A soo eode atio A ES ti ED AN oo ule 2 1 Electrical Connections ll lll KK KK KK KK KK KK KK KK K 2 2 Mounting s ata dol da goed a oiu ads ab a 2 1 Operation 2 E a A em Dah A m deis A E ale aoe J 2 9 Parallel Port ie ve e a a eed x ue la e ta 2 8 Pressure Connections tdi a e a a Sende eS 2 2 Interfaces Pneuniatic odds wed ae do A dove AA de wx reu a 7 4 Interfaces Remote User erur a aaay l delk dr n le ll ale naye Ml Gel nlne l l cir Qir kiye l dal n sos 7 5 TEMPO l li DE er e Ts t beg oet ie gh eh ie TOT greet beg i eet the 1 1 1 8 Circuit Boards os ees Sve ule av gh mE Ro din an ee Ree Bove ey ee ae Ew er en a 1 4 Did you get everything oy a ii an ki ara g e kelk ees 1 1 General Description zu sous ure va Sey MZ w Be RE a dg a a 1 1 Initial Inspection 26 9 scr och E We dea A a onc 99 o 79 al ss 0 1 1 Operational Description KK K K K K K K K K K K KK K KK KK KK KK KK 1 2 Liquid Density 22353 aa iy uem IEA A WANE QE ADA dv Sou eG A ADANA ne 48 9 4 January 2002 MENSOR CORP SERIES 4000 DPT INDEX Maintenanc mue oa 2b o din aA CA Xd oue ede Ee A RO AA ad 5 1 Beyond the Warranty lt fee 2 sooo gogo o oe e cal l k ka e s 5 1 Calibration Services ate 3 209 lt y K RU Peor HE reve bee a Pe
16. Zero Adjustment 2 200004 6 4 Span Adjustment ina 2e x9 X a an n RR RAS 6 7 Calibrating Current Output Model 4030 6 8 Adjusting Analog Voltage Output Model 4AX4X 6 9 7 SPECIFICATIONS Meas fe ios sus sis aaa a he A iR 7 1 General 2 ox wu nn nisan ee Be e E Fle Pe ee SR 7 2 Other Outputs 2 ll lees 7 6 8 OPTIONS AND ACCESSORIES Electrical Connectors 0 Wo d Tik eee ee eee 8 1 R lief Valves 25 soo A ae Be ARA v EA BOS di eck Ee oe ds es ES 8 1 Panel Mount Kit 4 4 423 2 sz al we A si z SE ee agr sa 8 1 9 APPENDIX Conversion Factors psi 9 2 Temperature Conversion 2 9 3 Head Pressure Correction lll 9 4 Gas Density sene a Ged Gul eee We eee lt r al 9 4 Liquid Density ceres 9 4 Head Pressure Calculation 9 5 Quick Reference List of Commands 9 6 BASIC Language Sample Program 9 7 Binary Two s Complement Model 4X10 9 8 10 GLOSSARY 5 6 LA ex ev X HR 10 1 LLJNDEX eun n Asya ul Wi a eS 11 1 MENSOR CORP January 2002 ix TABLE OF CONTENTS SERIES 4000 DPT Figures LI DPIOutline 424 4 aA co tt a a 1 3 1 2 Block Diagram Parallel Output 1 5 1 3 Block Diagram Analog Output 1 6 1 4 Block Diagram Current Output 1 7
17. an address in a multi DPT system January 2002 MENSORO CORP SERIES 4000 DPT SERIAL COMMUNICATIONS DADDRESS 1 lt If gt Changes DPT at address D to address 1 Query address lt lIf gt Returns the address of each DPT connected to the serial bus Returns address lt cr gt lt If gt 0 address 0 lt cr gt lt If gt DEFAULT This command sets the default values for the transducer specified Requires SAVE2MEMORY command to make the change permanent Normal default values are filter 90 window 01 FS Digits 6 Examples 4Default lf Sets default parameters at address 4 to the above values default lt If gt Sets all connected DPTs to the normal default values DIGITS Sets the number of digits for the pressure output resolution to the value of 5 6 or 7 Requires SAVE2MEMORY command to make the change permanent Examples 1digits 6 lf Sets the output resolution of DPT at address 1 to 6 digits DIGITS 7 lt If gt Sets the output resolution of all connected DPTs to 7 digits Query bdigits lf Returns the current resolution setting number of digits for the DPT at address B The returned value will be either 5 6 or 7 MENSOR CORP January 2002 3 7 SERIAL COMMUNICATIONS SERIES 4000 DPT DOC Date of Calibration requires master password DOC sets the date of calibration A four digit year month date string in the format of yymm is stored in memory Requires SAVE2M
18. capable of driving one TTL load Data lines 3 through 18 provide the pressure value If the BUSY line pin 32 is high logic 1 the DPT is updating data and the output is ambiguous When the BUSY line goes low the pressure data lines are valid The binary range is from O to 65535 counts to express the proportional full scale pressure range Zero pressure is repre sented by lines 3 through 18 and line 32 all being low Model 4X50 Binary Coded Decimal BCD The 36 pin connector pinouts for BCD output are shown in the third column of table 2 1 All of the data lines pins 3 through 23 and pin 32 are positive logic TTL level signals capable of driving one TTL load Data lines 3 through 23 provide the pressure value If the BUSY line pin 32 is high logic 1 the DPT is updating data and the output is ambiguous When the BUSY line goes low the pressure data lines are valid The binary range is from O to 100 000 counts to express the proportional full scale pressure range Zero pressure is represented by lines 3 through 23 and line 32 all being low Full scale pressure is represented by line 23 being high while all other data lines are low MENSOR CORP January 2002 4 5 SECONDARY OUTPUTS SERIES 4000 DPT User s Notes 46 January 2002 MENSOR CORP SERIES 4000 DPT MAINTENANCE MAINTENANCE This transducer was designed for maintenance free operation There are no user serviceable components inside
19. e e Eee Bs pe mie eque ede e Esta ke 1 3 7 3 DOC Date of Calibration 2 44645 64465 66 a 99840949 d dan tev tal a Aku d l cil 3 8 E ECO uva o RM ek Semi XT a Ot OLO E AS gee tig he 3 3 3 14 EIA 232 See RS 232 EIA 485 See RS 485 Electrical Connections See also Connections Electrical 2 2 2 9 8 1 Engineering Units See Units ERROR aui A car n k QA e Qelen Mel en Mae BS ide d n dav Ge a he ee Ue ale BR Be e Qa ae Qaz BB 3 9 Errors CI a m Y HB HRH HHH A a hat Ee oe i EE 3 3 8 MENSOR CORP January 2002 11 3 INDEX SERIES 4000 DPT FILTER Command i ara a a AR zay AAC A an REA E wu s 3 10 7 2 Fittings o wee e ea ede Eg se gestu eue Roe eiue ias dea la 1 1 2 2 Gas Density 22 a 4 s uox o dox Ros do A 9 4 Global Operator it xn Pa UR gk ERU d Wl dod Sk gels gordo 3 2 Glossary oo cee Get Ss EU Romae al pt xem wee we e eE Ee Ee oe ee ose ak Ba 10 1 10 6 Head Pressure Correction 9 4 Calculation BN 50 979 A A A A A NON Si Pe te He eT 9 5 Gas Density k ge dl dd ide o tx o eA eee todas 9 4 Liquid Density e i 309 40 dd a da lk h l ed 9 4 ESPANA A A Y key d Sd We q ed 1 4 2 TLZERO it a ae dox wwe Oe EE ee XU VE de Que ew ee a 4 2 VO Circuit Board le Govea xe en Ga ee eee a Bele AVANT a RE ALAS edl dele BIS ere da 1 5 QA ee eck a arse Ped Gace 4 do co Gel ied adus ob qe uses ota t 08 a ch wee HHHH 3 10 Inspection Initidl
20. flag or message if additional errors have been detected Each Error Query will clear one 3 8 January 2002 MENSOR CORP SERIES 4000 DPT SERIAL COMMUNICATIONS error counter from the buffer It is advisable to continue to send error queries to an affected DPT until a NO ERROR message is returned DATE OF CAL NUMBER OUT OF RANGE ERROR FILTER VALUE OUT OF RANGE ERROR FILTER WINDOW VALUE OUT OF RANGE ERROR DIGITS VALUE OUT OF RANGE ERROR ZERO VALUE OUT OF RANGE ERROR SPAN VALUE OUT OF RANGE ERROR TARE VALUE OUT OF RANGE ERROR UNKNOWN COMMAND Note that the error buffer can also be cleared by removing and then restoring power to the DPT ERROR Responds with error status Returns NO ERROR cr lf or an error message from the list below DATE OF CAL NUMBER OUT OF RANGE ERROR FILTER VALUE OUT OF RANGE ERROR FILTER WINDOW VALUE OUT OF RANGE ERROR DIGITS VALUE OUT OF RANGE ERROR ZERO VALUE OUT OF RANGE ERROR SPAN VALUE OUT OF RANGE ERROR TARE VALUE OUT OF RANGE ERROR UNKNOWN COMMAND Error lt lf gt The response will first echo the query then return a one line message from each DPT in the system ERROR cr lf 0 NO ERROR cr lf MENSOR CORP January 2002 3 9 SERIAL COMMUNICATIONS SERIES 4000 DPT FILTER filter ID 3 10 This command sets the f
21. is not recommended PANEL MOUNT KIT PN 0014485001 A DPT can be modified for panel mounting such that the pressure ports are available from the front of a rack The modified DPT figure 8 1 has a flat front face and slips into a cutout as shown in figure 8 2 The figure illustrates a single DPT fitted into a standard 5 25 high by 19 inch wide rack panel Up to five DPTs can be safely mounted in a single rack panel MENSOR CORP January 2002 OPTIONS AND ACCESSORIES SERIES 4000 DPT mensor P MODEL SN TRANSDUC RANGE CODE Side View Front View Figure 8 1 Panel Mount DPT Cutout for Panel Mount DPT Four 0 156 Dia thru holes or 0 125 Maximum radius corners 6 32 unc 2b threads 4 Places 0 220 0 525 2 550 Figure 8 2 Cutout Dimensions for a Panel Mounted DPT 8 2 January 2002 MENSOR CORP SERIES 4000 DPT APPENDIX APPENDIX TABLE OF CONTENTS Table 9 1 Conversion Factors psi 9 2 Table 9 2 Temperature Conversion Table 9 3 Head Pressure Correction 9 4 Table 9 3 Gas Density 9 4 Table 9 4 Liquid Density 9 4 Figure 9 1 Head Pressure Calculation 9 5 Table 9 5 Quick Reference List of Commands 9 6 BASIC Language Sample Program 9 7 Binary Two s Complement optional Model 4X10 9 8 MENSOR CORP January 2002 9 1 APPENDIX CONVERSION FACTO
22. output port to be filled by the media Warm up The period of time from the application of power until the instrument has reached its operating temperature required to assure that the instrument will perform within all specified tolerances Zero Drift A change in the zero pressure output over a specified period of time 10 6 January 2002 MENSOR CORP SERIES 4000 DPT INDEX INDEX QUEEN a oo Ee Une Bott o A Ba 3 6 A A D Ciremit Board nal DI ded nk A dud veu 1 4 ACCULACY 7 wc See eo de atu ee ee osi eee eh el a cea te gh a 7 1 Address Global Operator K K K K K K K K K K K K K K KEK KK K KK KK KK 3 2 ADDRESS Command i rer e sow A A RU Rare AA m ade Po Ew a 3 6 ANA SPAN 60 i a de Aw Set ke Me tel arre qe akrd eae k aki n tg Q Sr k k ki ask OP te e welle 4 3 ANAJZERO 0 ita 27 2wa Saf win or ue ec Pd Ge th Y ox Es ie av oe a i aed 4 4 AnaloOutput os e r a ee al e aland al awa 1 3 1 6 4 3 4 4 6 10 7 7 7 8 Adjusting Analog Voltage Output KE KEKE KEKE K K KEK KK KK KK KI KK KH 6 9 Adjustment Ranges 00 2 eee hh sn 7 7 Block Diagtam ke Rie be aede Bur eue xo Bur E Re kre BAS Fee e She 1 6 Broad Band Noise o sesa 4 ob mo drug wR Rw PB A 7 8 Circuit Board o 0 Wr uo KI a ES e Ye AGENS eod m Su es s qur d 1 6 Monotonicity gt once o A RUPTA Na UP Rc e AUS 6a d VE ST eus 7 7 Output Current a Y De ee ah 7 8 Resolution 4
23. to address 1 with linefeed termination character Only one DPT should be connected or all will be set to address 1 The following is a DPT command sample program setup com port OPEN COM1 9600 N 8 1 DSO CDO CSO FOR RANDOM AS 1 set device to address 1 add line feed PRINT 1 ADDRESS 1 CHRS 10 The following is a DPT query sample program setup com port OPEN COM1 9600 N 8 1 DSO CDO CSO FOR RANDOM AS 1 query device at address 1 for output pressure add line feed PRINT 1 1 CHRS 10 FS gt read back pressure string one character at a time until line feed DO BS INPUTS 1 1 FS FS BS LOOP UNTIL BS CHRS 10 CLOSE 1 PRINT FS MENSOR CORP January 2002 9 7 APPENDIX SERIES 4000 DPT BINARY TWO S COMPLEMENT Model 4X10 Two s complement notation is a way of expressing negative values using binary numbers In the following example an 8 bit word is used to demonstrate the technique The decimal value 13 in an eight bit binary word is 0000 1101 13 To form the binary equivalent of 13 in two s complement we first reverse each bit of the positive value as follows 1111 0010 one s complement of 13 Then we apply the two s complement to the one s complement by adding 1 to the derived value 11110011 13 two s complement of 13 We can check the result by adding the positive and negative of the same value together to see if they cancel out
24. 0000 1101 13 11110011 13 0000 0000 0 Note that binary 1 1 is O with a 1 carry The left most carry causes an overflow ninth bit Since we defined an 8 bit limit for the exercise the overflow bit is discarded When using two s complement some way must be provided to advise the user whether the binary string value is positive straight binary or negative two s complement This can be done by reserving the most significant bit as a polarity indicator In the two s complement binary output DPT the pressure value is given in the first 15 bits and the 16th bit is the sign bit If the left most bit is zero the following bits are positive If it is a 1 the remaining bits are two s complement representation of a negative value 9 8 January 2002 MENSOR CORP SERIES 4000 DPT GLOSSARY GLOSSARY Absolute Pressure A pressure that is referenced to the absence of all other pressure that is referenced to true zero pressure See also Pressure Relationships Accuracy The ratio of the error to the full scale output expressed as a percent of full scale The combined error of repeatability nonlinearity and hysteresis Altitude The vertical distance above mean sea level expressed in units of length meters or feet The DPT uses the ICAO Standard Atmosphere 1964 to relate absolute pressure 14 696145 psia to altitude Ambient Conditions The conditions pressure temperature etc surrounding the case of the instrument Attitude
25. 02 MENSORO CORP SERIES 4000 DPT TEMPERATURE CONVERSION Table 9 2 Find the known value in a center shaded column If the known value is in C then the equivalent value is found in the F column or if the known value is in F then the conversion is found in the C column APPENDIX OG oF C oF o oF Oe oF 17 78 0 32 00 10 00 50 122 00 37 78 100 212 00 65 561150 302 00 17 22 1 33 80 10 56 51 123 80 38 33 101 213 80 66 11 151 303 80 16 67 2 35 60 L1 11 S28 125 60 38 89 102 215 60 66 67 152 305 60 16 11 3 37 40 11 67 53 127 40 39 44 103 217 40 67 22 153 307 40 15 56 4 39 20 12 22 54 129 20 40 00 104 219 20 67 78 154 309 20 15 00 5 41 00 12 78 55 131 00 40 56 105 221 00 68 33 155 311 00 14 44 6 42 80 13 33 56 132 80 41 11 106 222 80 68 89 156 312 80 13 89 7 44 60 13 89 57 134 60 41 67 107 224 60 69 44 157 314 60 13 33 8 46 40 14 44 58 136 40 42 22 108 226 40 70 00 158 316 40 12 78 9 48 20 15 00 59 138 20 42 78 109 228 20 70 56 159 318 20 12 22 10 50 00 15 56 60 140 00 43 33 110 230 00 71 11 160 320 00 11 67 11 51 80 16 11 61 41 80 43 89 111 231 80 71 67 161 321 80 11 11 12 53 60 16 67 62 43 60 44 44 112 233 60 72 22 162 323 60 10 56 13 55 40 17 22 63 145 40 45 00 113 235 40 72 78 163 325 40 10 00 14 57 20 17 7
26. 10 4 January 2002 MENSOR CORP SERIES 4000 DPT GLOSSARY Pressure Units See Measurement Units Primary Standard Pressure Measuring A device which is directly traceable through fundamentals of mass and surface area column height and specific gravity Range The measurand values over which the measuring device is intended to measure specified by the lower and upper limits See also Full Scale and Span Reference Pressure The pressure relative to which a differential pressure instrument measures pressure Repeatability The ability of an instrument to reproduce output readings when the same pressure value is applied repeatedly under the same conditions and in the same direction Resolution Output The maximum number of distinguishable values of output over the range of the instrument Stated another way the least detectable magnitude of change in the pressure Response Time The length of time required for the output of the instrument to rise to a specified percentage of its final value as a result of a step change of pressure RS 232 See ElA 232 RS 485 See EIA 485 Span The algebraic difference between the lower and upper limits of the range See also Full Scale and Range Stability The ability of an instrument to retain its performance characteristics for an extended period of time Temperature Error The maximum change in output at any pressure value within the specified range when the transducer temperatu
27. 2MEMORY to preserve the latest zero offset value January 2002 MENSOR CORP SERIES 4000 DPT SERIAL COMMUNICATIONS COMMAND STRING FORMAT The first character in a command is always a Start of Message symbol either for RS 232 or for RS 485 This is followed immediately by the transducer address 0 9 A Z or Next is the command query field followed by a delimiter and an optional data field Finally the command is terminated with a linefeed lt lf gt The full command string format is illustrated below PREFIX MESSAGE D Aste C m k EE A d C C dD D lt lf gt S Q A A query string is formed by excluding the data field and inserting the query operator a question mark immediately ahead of the linefeed as follows A d C C lt lf gt RETURN STRING FORMAT DPTs respond to an RS 232 query with a return string in the following format PREFIX MESSAGE 40 characters max TERMINATION A INS ke pr E NR NE C TN a UN Le ON 2 E d d d d d d d lt cr gt lt lf gt S lt amp Sn 22 ONE A amp RE Op a e 2 gt 5 6 or 7 digits and a floating decimal Ca A So point for a pressure value leading zeros Ss 9 Cs 3o do not display e o So 9 cA D 92 X Sb Ge b 7s o S 3s e 97 o Z O Ya o 5 S c gt Note that DPTs in an RS 485 setup will not echo the received message and the Start of Message symbol is Otherwise
28. 5 to O 6 000 max Psig O 0 36 to O 6 000 max Pressure Ranges Bidirectional or vacuum Psig 0 36 to 0 36 min atm to 6 000 max Measurement Units See Table 9 1 in the Appendix Section MENSORO CORP January 2002 7 1 SPECIFICATIONS SERIES 4000 DPT Resolution User selectable over the serial bus RS 232 or RS 485 5 6 or 7 significant digits up to 1 ppm max plus decimal point and negative sign if required Calibration Adjustments Zero may be reset through the serial port without affecting span or linearity Span may be reset through the serial port without affecting zero or linearity Calibration Interval The DPT should have the span verified periodically to insure its stability Initially the recommended period between calibration is three months This period may be extended as confidence is gained in the stability of the transducer Calibration Data Storage See the SAVE2MEMORY command for explanation of parameters which can be stored in non volatile memory and the procedure to accomplish this Measurement Filters FILTER command sets the filter percentage applied to the output pressure val ues Valid filter percentages are 0 99 GENERAL SPECIFICATIONS Size 2 52 x 3 635 x 5 085 6 40 cm x 9 23 cm x 12 92 cm See figure 7 1 Weight 1 8 Ib 0 82 kg maximum without external fittings or connectors Mounting Four mounting holes are on 2 144 by 4 71 centers 5 45 cm x 11 96 cm Panel Mou
29. 500 psi 251 to 500 psi 1000 psi 501 to 1000 psi 2000 psi 1001 to 2500 psi 5000 psi 2501 to 6000 psi 7500 psi Overpressure Protection Various style relief valves available as options 7 4 January 2002 MENSORO CORP SERIES 4000 DPT SPECIFICATIONS Common Mode Pressure lt 15 psig for units with a Reference Port Compensated Temperature Range 15 C to 45 C standard O C to 50 C optional Operating Temperature Range O C to 50 C Storage Temperature Range 20 C to 70 C Remote User Interfaces RS 232 or RS 485 all models through a DB 9 connector See General Descrip tion in the Introduction Section for breakdown of other outputs and connectors by model number Warm up Approximately 15 minutes to rated accuracy Reading Rate Update Rate 17 readings per second typical 20 maximum Response Time Sensor Response to full scale pressure step 0 25 seconds Orientation Effects Zero negligible Span negligible Linearity negligible Shock Vibration Minimal vibration 5 gravities acceleration maximum Pressure Media Clean dry non corrosive gases Measure Internal Volume Pressure Chamber 0 6 cc MENSOR CORP January 2002 7 5 SPECIFICATIONS SERIES 4000 DPT Reference Internal Volume Reference Chamber lt 20 cc Operating Environment Temperature 0 C to 50 C Note This may not be the compensated temperature range Humidity 5 to 95 RH non condensing humidity OTHER
30. 5546 EG l al Qa Yo l al S9 RE l a BS A uk S al ul da 7 8 Serial Commands s sce s a a Sal AA 4 3 Update Rate eom O du re oe w Pas Sa eoe uec Q8 e es 7 8 Appendix 2 i Da Ro Ee ede Rod te a ll as di Bola eke ee Blab So 9 1 9 8 Basic Language Sample Program 6 1 KK KE KEKE K KE K K KK K KK KK KK KH 9 7 Binary Two s Complement a AT yal 4 2044 da i Kl 3 en 9 8 Conversion Factors PSI la a u lel 9 2 Head Pressure Correction ecw eee 425444 o s 9 4 Quick Reference List of Commands K K K K K K K K K K K KK 9 6 Temperature Conversion 4 4 ci d 2 ne c l Wl da 6 ld cal d n cul 9 3 B Barrier Strip TB Wiring o 2 a l ee 2 3 BASIC Language Sample Program are 9 7 Binary Coded Decimal BCD K K K K K KK 2 8 2 9 4 5 7 8 Binary Output o 2 35 a a A Bea ee 443 E daa ada 2 8 2 9 4 5 Connector P IROULS gt gre 2 4 DAA irak re ME A d k rt 2 8 4 5 TWO S Complement i 26 sock oou ad SA ero 4 5 7 8 Binary Two s Complement 4 es 2 8 4 5 7 8 9 8 Calibration cus dou os oe dew e wan A Ae AR 6 1 6 10 Adjusting Analog Voltage Ouput KK KK KEK KE K K KE KEK K KK K KK KK KK 6 9 Adjustment Zero and Span 2 ee 7 2 Analog Voltage Output Adjustment K K K KEK K K K K KK KK KK 6 10 MENSOR CORP January 2002 11 1 INDEX SERIES 4000
31. 8 64 47 20 45 56 114 237 20 73 33 164 327 20 9 44 15 59 00 18 33 65 49 00 46 11 115 239 00 73 89 165 329 00 8 89 16 60 80 18 89 66 150 80 46 67 116 240 80 74 44 166 330 80 8 33 17 62 60 19 44 67 52 60 47 22 117 242 60 75 00 167 332 60 7 78 18 64 40 20 00 68 154 40 47 78 118 244 40 75 56 168 334 40 7 22 19 66 20 20 56 69 156 20 48 33 119 246 20 76 11 169 336 20 6 67 20 68 00 21 11 70 158 00 48 89 120 248 00 76 671170 338 00 6 11 21 69 80 21 67 71 159 80 49 44 121 249 80 77 22 RW 339 80 5 56 22 71 60 22 22 72 161 60 50 00 122 251 60 77 78 172 341 60 5 00 23 73 40 22 78 73 163 40 50 56 123 253 40 78 33 173 343 40 4 44 24 75 20 23 33 74 65 20 51 11 124 255 20 78 99 174 345 20 3 89 25 77 00 23 89 75 167 00 51 67 125 257 00 79 44 175 347 00 3 33 26 78 80 24 44 76 168 80 52 22 126 258 80 80 00 176 348 80 2 78 27 80 60 25 00 77 70 60 52 78 127 260 60 80 56 177 350 60 2 22 28 82 40 25 56 78 172 40 53 33 128 262 40 81 11 178 352 40 1 67 29 84 20 26 11 79 174 20 53 89 129 264 20 81 67 179 354 20 1 11 30 86 00 26 67 80 176 00 54 44 130 266 00 82 22 180 356 00 0 56 31 87 80 27 22 81 177 80 55 00 131 267 80 82 781181 357 80 0 00 32 89 60 27 78 82 179 60 55 56 132 269 60 83 33 182 359 60 0 56 33 91 40 28 33 83 181 40 56 11 133 271 40 83 89 183 361 40 1 11 34 93 20 28 89 84 183 20 56 67 134 273 20 84 44 184 363 20 1 67 35 95 00 29 44 85 185 00 57 22
32. DPT Calibrating Current Output K K K K K K K K K K K K K K KK K KK KK 6 8 Calibration Medid e sn tee A ande en he a Kay eigen Acte OR ay AU And en kote a 6 2 Calibration Processes s Soo SUC TE AA Te A C MIL e A dg 6 2 Data Storage aa a 49 wo a XS A Y YU SE CAE ue MU Ak d z Vus e n d 7 2 Digital Output Calibration K K K K K K K K K K K K K K K K K K K KK 6 4 Environment 4 23 206 O ANS O is co A ee ue is 6 1 Equipment ia se ah ode as ls dl da de 6 1 Interval Luci ss di fk a a A a anka 7 2 Pressure Standard uon O A AA A a a A A 6 2 Services sal Feet il ls o ge ve d k ld Me hos yh fe 5 1 Setup for Gauge Absolute Pressure Calibration 505504 6 3 Span Adjus ment o EAE xU Ue dre A EUR A EE UAR e dra 6 7 Stability Zero and paa 7 1 Circuit Boards 2 A a A de ee De a 1 4 1 7 4 20 MA Outp t estic alan ee nene uv e n ars Be E ii A de 1 7 4 1 A D Cire tit Board k dote aida ei it ie i d aedes d 1 4 1 7 Analog Output Circuit Board KK KEKE KEK KE KEKE K KK KK KK KK KK KH 1 6 Current Output Circuit Board e 1 7 VO Circuit Board o2 9 sce endo e eee emo O Bee ay 1 5 Micro Computer Circuit Board K K K es 1 4 1 7 Command String Format 3 5 Commands v 3825 A A A un eto ro ec Pei reu et n Pie e cal idunt irt es 3 3 3 13 Conventions 4 20 saiia le ky wee ta ed eee behe a 3 4 Quick Reference L
33. DPT Figure 1 4 is a block diagram of the internal relationships for the Current Output DPT A D PCB 5 VDC 18 28 VDC 5 12v 9 500 VDC Gnd i Gnd Pressure SENSOR Conv e Isolation input aS 12 5V Converter A D 0 A D 1 gt i A D Power INTFC Input BUS From TB1 I J2 JP2 1 18 28 VDC MICRO COMPUTER Serial PCB Bus AC PCB EXPANSION Power BUS Voltage To A D PCB A r TB1 4 20 mA OUT 500 VDC S 6 No Connection OPTION PCB Isolation G 5 No Connection Model Opto Current amp 4 Current Output 4030 Isolator Output 3 Current Output S 2 Power Ground S S I Figure 1 4 Block Diagram Current Output MENSORO CORP January 2002 1 7 INTRODUCTION SERIES 4000 DPT User s Notes 1 8 January 2002 MENSOR CORP SERIES 4000 DPT INSTALLATION INSTALLATION CONFIGURATION A typical system will consist of an IBM PC compatible computer with installed driver software one or more DPTs a DC voltage power supply and the intercon necting cables A maximum of 36 DPTs may be connected together in a multi drop configuration using RS 232 or up to 32 DPTs using RS 485 MOUNTING The sensor used in the DPT is relatively insensitive to tilt and vibration However low pressure sensors especially isolated sensors are more sensitive to orienta tion
34. E Y e An Bee desc ea tue deza ds 7 2 Return String Format lt Ra 4 2l ll a e eee e e nn 3 5 RS 2392 55 2 tas MUS ek dua a o A6 rU Mua Se dus AGI US 1 1 2 4 3 14 Cable ete faves Eno ie Os ane Nun Ree o ar atur Meus REC Iis ar Reve d DES Bre Rees dere Ge 2 5 Connections Serial Port 2 2 W 2 5 Kn W n Seis D a S942 0k Qar a 2 4 RS 232 RS 485 Differences Q y dl Q al dua a nd ee 3 14 RS485 tic 2 dada aa dl A a k EA Ao deyan d ana o Ac del n s anka 2 6 2 7 3 14 Cable 5 Drew 2 6 2 7 SerialPort se wees kee der k at sal qe oh kel ee der asme eae e kel da dl ral aaah at RE io aga See 2 6 SAVE2MEMORY Command 3 6 3 7 3 10 3 11 3 14 4 4 6 4 6 9 Secondary Outputs sk wse ue be A ae ee a a ne qe DA E AA ate 4 1 4 6 41020 mA Output ncs Ox ae x 9e 4 4 X X SG A a ee XR V 4 1 Analog O tput 24 ss s 404 5 dos dos AUR k s A sS E e Pea AU US A 4 3 General 5 vira ded osuere spore o SN gis apu Hu Mr ped A A er e pde dote ab ed c Gee ah 4 1 Parallel Port oo e o go oes poe dee lal al ln p del at mana id p dto RE ME o 4 4 Sensor 4 18 1504 3 84d BOR AUR OR AS A AA CR ATA AHORA A A EO RA CA RIA d 1 2 2 1 Serial Communications 3 1 3 14 11 6 January 2002 MENSOR CORP SERIES 4000 DPT Command Conventions 2 KEKE KEKE KEKE KK KK KK KK Sos 3 4 Command String Format elan leere 3 5 Cormiumarnds se Se ued Roos A We Se
35. EMORY The DOC command is not valid for Model 4030 DPTs 4 20 mA output Examples 1PP DOC 9706 lf Sets the date of calibration for the transducer at address 1 to June 1997 Query 1DOC lf Returns the currently stored date of calibration at address 1 Errors When a DPT detects an error it stores an error in its internal queue This buffer can store multiple errors When a command is sent to a DPT that has error s in its buffer it will send an error flag E The error flag is displayed between the address and data in the response string Examples Query address 1 for a pressure reading 1 lt If gt Response 1E 100 000 lt cr gt lt If gt Indicates an error has occurred at address 1 and that it currently senses 100 000 pressure units at its input Query for pressure readings using the global address lt If gt Response lt cr gt lt lIf gt 1E 100 000 lt cr gt lt lf gt Return string echoes the global query and then appends the requested data adding one new line for each responding DPT After receiving a response that includes an error flag an Error Query should be issued to the affected address to determine the specific nature of the error The DPT will transmit either one of the error messages listed below or NO ERROR if the error has subsequently been cleared Upon responding to the Error Query the DPT will clear the top error counter from its buffer and be ready to transmit a second error
36. In many facilities the highest accuracy pressure measuring or pressure controlling instrument is a Mensor product A typical application for these Mensor instru ments is the calibration of other pressure devices such as sensors transducers transmitters gauges and pressure switches The Mensor product is used as the pressure standard to verify pressure calibrations or outputs of the device being produced checked tested or certified MENSORO CORP January 2002 V PREFACE User s Notes SERIES 4000 DPT vi January 2002 MENSOR CORP SERIES 4000 DPT TABLE OF CONTENTS TABLE OF CONTENTS Warranty ea a a al b n cO dy ian ke kar ae KU s t C A Oo de Sos ii Warnings and Caution Notes KEK K KK K K iii Please Notice Ea rete as Be dne ta x ues di iii Trademarks avia dra bs deg debe hoe duode ue de a cdo la iii Software License Agreement K K K K K K KK iv Packaging For Shipment K K K K K K K iv Mensor Background e v 1 INTRODUCTION Did you Get Everything eee 1 1 Initial Inspection llle 1 1 General Description KEK K K K K K K KK KT 1 1 Operational Description K K K K K K K K K K KK KT 1 2 D61SOL 4a7 nara UA A na A 1 2 Communications 2 2 2 2 2 2 2 2 1 2 Serial In Out Al Models 1 2 Current Output Model 4030
37. ORMANCE OF THE SOFTWARE PROGRAM PACKAGING FOR SHIPMENT Save the original packaging material This packaging is designed to provide adequate protection to the product under commonly encountered conditions Re use it whenever the product is to be shipped via a common carrier If the product must be shipped without the original packaging the recommended method of packing is to place the instrument in a container surrounded on all sides with at least three inches of shock attenuation material such as styrofoam peanuts iv January 2002 MENSOR CORP SERIES 4000 DPT PREFACE MENSOR BACKGROUND HISTORY Mensor was established in 1969 in Houston Texas as an independent spin off from the Texas Instruments TI Pressure Instrument Group As a private corporation Mensor s objective was to design and produce high accuracy high quality easy to use pressure instruments In 1978 Mensor moved to its present location in San Marcos on Interstate 35 the Austin San Antonio corridor Two and a half years after the move the plant was destroyed by fire on Friday February 13 1981 Mensor resolved to come back and almost before the ashes had cooled construction of a new building began on the same site Six months after the disaster Mensor moved into its present facility and began shipping products to customers who had waited patiently for the recovery PEOPLE The key to Mensor s strength in the marketplace is the concentration of experienced peo
38. OUTPUTS 7 6 Voltage Output Ranges Model 4X40 Oto 10 VDC Model 4X41 Oto 5 VDC Model 4X42 Oto 1 VDC Model 4X43 1 to 1 VDC Accuracies Oto 10 VDC 0 010 FS All others 0 025 FS Response time 7 6 readings per second with RS 232 not in use Current Output Model 4030 Power Nominal 24 VDC 18 to 28 volts 130 mA at 24 VDC Connector TB1 6 position barrier strip Accuracy 0 025 FS Reading Noise Less than 0 01 of full scale current No reading greater than 0 01 of full scale when 1000 readings are taken under static pressure and temperature conditions and in a typical electrical operating environment January 2002 MENSOR CORP SERIES 4000 DPT SPECIFICATIONS Conversion Rate 18 conversions per second with RS 232 not in use Output Current to Pressure Relationship 4 mA 0 FS 20 mA 100 FS Resolution 16 bits 0 0015 FS Analog Output Models 4X40 4X41 4X42 and 4X43 Table 7 3 Analog Output Adjustment Ranges Model RS 232 Adjustment Pot Adjustment Zero 11 FS 10 1 FS 4X40 Span 11 FS 0 05 FS Zero 1 FS 0 19 FS 4X41 Span 1 FS 0 05 FS Zero 1 FS 0 50 FS 4X42 Span 1 FS 0 05 FS Zero 1 FS 0 50 FS 4X43 Span 1 FS 0 05 FS NOTES 1 On Models 4X40 4X41 and 4X42 the zero pot is adjusted at or near O volts with O pressure and the span pot is adjusted at or near full scale output voltage
39. RS PSI Table 9 1 The following table lists conversion factors which should be used as multipliers of the pressure to be converted to or from psi SERIES 4000 DPT Pressure Unit To convert from Psi To convert to PSI 1 psi 2 inH20 4 C 27 68067 3 612629E 02 3 inH20 20 C 27 72977 3 606233E 02 4 inH20 60 F 27 70759 0 03609119 5 ftH20 O 4 C 2 306726 0 4335149 6 ftH2O 20 C 2 310814 0 4327480 7 ftH20 60 F 2 308966 0 4330943 8 mm H20 O 4 C 703 0890 1 422295E 03 9 cm H20 O 4 C 70 30890 1 422295E 02 10 m H20 O 4 C 0 7030890 1 422295 11 in seawater 26 92334 3 714250E 02 12 ft seawater 2 243611 0 445710 13 m seawater 0 6838528 1 462303 14 inHg 0 C 2 036020 0 4911544 15 inHg 60 F 2 041772 0 4897707 16 uHg 0 C 51715 08 1 933672E 05 17 mm Hg 0 C 51 71508 1 933672E 02 18 cm Hg 0 C 5 171508 1 933672E 01 19 mtorr 51715 08 1 933672E 05 20 torr 51 71508 1 933672E 02 21 Pa 6894 757 1 450377E 04 22 hPa 68 94757 1 450377E 02 23 kPa 6 894757 1 450377E 01 24 mPa 6 894757E 03 1 450377E 02 25 dynes cm 68947 57 1 450377E 05 26 g cm 70 30697 1 422334E 02 27 kg cm 0 07030697 1 422334E 01 28 atm 6 804596E 02 14 69595 29 mbars 68 94757 1 450377E 02 30 bars 6 894757E 02 1 450377E 01 31 oz in 16 0 0625 32 psf 144 6 944444E 03 33 tsi 0 0005 2000 34 tsf 0 072 13 88889 9 2 January 20
40. RS 485 command begins with a dollar sign The question mark period comma space and carriage return CR characters are significant to the DPT Some commands require a password pre qualifier string A linefeed lt lf gt terminates each com mand DPT ADDRESS A DPT must be have an address assigned when first put into service Thirty six addresses are available O through 9 and A through Z Each DPT is assigned address 1 before it leaves the factory The address of each transducer in a multi DPT system must be unique A user can change a DPT address over the serial bus by sending an ADDRESS command The procedure to change the address is covered in the text under Commands later in this section GLOBAL ADDRESS OPERATOR In addition to the individual addresses an asterisk functions as a global address operator over the serial port The global address operator must not be used with the ADDRESS command if more than one transducer is connected There are slight differences in the use of the global address operator between RS 232 and RS 485 Separate explanations are presented in Table 3 1 When the host issues a message using a global operator all of the connected transducers will respond The first line of the response merely echoes the command which was sent to acknowledge receipt of the command Then each transducer will send a single line response string with each string terminated by cr If Thus
41. S 4000 DPT CALIBRATION mA current output option The final portion of text provides instructions for adjusting an optional analog voltage output signal SHUT OFF VENT VALVES Setup for Gauge Pressure Calibration COMPUTER PRESSURE SUPPLY LINE W REGULATOR METERING VALVE SHUT OFF VALVE VOLUME Serial CONTROLLER or other Required to calibrate Digital Output either an analog voltage output or a 4 20mA ATMOSPHERE current output PRESSURE PRESSURE STANDARD SHUT OFF VENT VALVES Setup for Absolute Pressure Calibration COMPUTER PRESSURE SUPPLY LINE SHUT OFF REGULATOR VALVES METERING VOLUME CONTROLLER DMM TAN or other Digital Output Required to calibrate VACUUM either an Analog voltage output or a 4 20mA Current output PRESSURE NOTE Disconnect when the vacuum gauge range is exceeded PRESSURE DIAPHRAGM TYPE STANDARD VACUUM GAUGE Figure 6 1 Calibration Setup MENSOR CORP January 2002 6 3 CALIBRATION SERIES 4000 DPT DIGITAL OUTPUT CALIBRATION Refer to figure 6 1 for the type of transducer gauge differential or absolute to be calibrated In addition to the pneumatic equipment this procedure requires a computer configured for serial communication RS 232 or RS 485 DPT com p
42. an values to calibrate the instrument or affect any of several other operating values The user can also query the DPT for acurrent pressure reading or other parameter value or receive information on error conditions This section provides information on serial port configuration explains the command conventions used in this manual and lists the common commands and queries which are accepted by all DPTs Some RS 232 specific information is presented followed by specific RS 485 information Additional commands which are unique to individual models are included in the text relating to those models in Section 4 Secondary Outputs RS 485 SERIAL COMMUNICATION Models 41XX The RS 485 option displaces the standard RS 232 serial bus All RS 485 DPTs are identified as Model 41XX where XX is two digits taken from table 1 1 to identify the secondary output format This option is available with any of the listed secondary output options except for the 4 20 mA output Model 4030 For RS 485 operation the male J2 serial port connector is replaced by a female DB9 connector MENSOR CORP January 2002 3 1 SERIAL COMMUNICATIONS SERIES 4000 DPT SERIAL PORT CONFIGURATION The DPT operates at 9600 baud The data format is 8 data bits 1 stop bit and no parity The DPT uses XON XOFF serial protocol All commands and responses are in ASCII lower and upper case are interpreted the same Every RS 232 command begins with the pound symbol Every
43. at address 3 ANA_ZERO requires zero password Loads an analog zero correction to allow recentering of the zero adjust pot Full range of this command is from 0 1 to 0 1 representing 0 1 volt change for a 0 to 10 volt output model For more information see Adjusting Analog Voltage Output in the Calibration Section Examples 2PP ANA ZERO 0 03 lt lf gt Increases the analog output voltage by 0 03 volts for the DPT at address 2 This does not affect the transducer s zero offset setting as returned by the serial bus Query 1ana zero lf Returns the voltage offset without the scale factor added to the analog zero output PARALLEL PORT Models 4X10 4X11 and 4X50 Figure 2 5 illustrates the parallel output connector and table 2 1 shows the various pinout configurations All of the lines shown as Digit are binary data to represent the integer pressure value There is also a line for the BUSY READY signal and a digital common or ground line Note that the polarity signal is available only on the two s complement configuration The other pinout variations are for positive pressure values only An external accessory line of up to 100 mA at 5 VDC is also provided The pins on the parallel port are live and the data is always available whenever the DPT is powered on A properly wired mating connector and a decoder is all that is required to read the transducer pressure from the parallel port Descrip tions of each of the
44. atible software and the interconnecting cable Please notice that the commands listed in this section are shown in RS 232 format These are the bare commands seen by the DPT stripped of all program ming idioms Depending on the specific language used to program them these commands may have to be preceded by or enclosed in various symbols for transmission For this procedure it is assumed that the transducer under test has address number 1 The serial number of the DPT being calibrated can be obtained by sending address ID lt If gt Correction Value Query The stored corrections for zero offset or span scale factor can be retrieved over the serial communication bus These values may have up to six significant digits plus a decimal point and a sign To see these stored values send either 1ZERO lt If gt or FISPAN lt If gt These commands may be useful in determining the actual changes in zero and span over time Unauthorized alterations of the values can be detected by comparison with previously recorded correction values NOTE Each command issued to set a calibration parameter must be followed by the SAVE2MEMORY command to make it permanent Otherwise the changes will be lost the next time power is lost at the transducer Zero Adjustment To adjust zero first determine the correct zero offset and second send a zero correction to the DPT The technique for establishing a zero pressure point and finding the resulting zero of
45. ation at TEL 1 512 396 4200 TEL 1 800 984 4200 U S A only FAX 1 512 396 1820 WEB SITE http www mensor com E MAIL sales mensor com tech support mensor com TRADEMARKS Mensor is a registered trademark of Mensor Corporation All other brand and product names are trademarks or registered trademarks of their respective companies 1993 2002 Mensor Corp All rights reserved MENSOR CORP January 2002 iii PREFACE SERIES 4000 DPT SOFTWARE LICENSE AGREEMENT This product contains intellectual property i e software programs that are licensed for use by the end user customer hereinafter End User This is not a sale of such intellectual property The End User shall not copy disassemble or reverse compile the software program THE SOFTWARE PROGRAMS ARE PROVIDED TO THE END USER AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED IN CLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE THE ENTIRE RISK OF THE QUALITY AND PERFORMANCE OF THE SOFTWARE PROGRAM IS WITH THE END USER MENSOR AND ITS SUPPLIERS SHALL NOT BE HELD TO ANY LIABILITY FOR ANY DAMAGES SUFFERED OR INCURRED BY THE END USER INCLUDING BUT NOT LIMITED TO GENERAL SPECIAL CONSEQUENTIAL OR INCIDEN TAL DAMAGES INCLUDING DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION AND THE LIKE ARISING FROM OR IN CONNECTION WITH THE DELIVERY USE OR PERF
46. connection no connection NOTE All digital outputs are TTL level positive logic Each line drives one TTL load Operation After all the pressure connections and electrical connections are made the DPT is ready to operate There are no setup switches on the transducer itself Refer to the sections on Serial Communications or Secondary Outputs for operating instructions and for information about reading pressure measurements MENSOR CORP January 2002 2 9 INSTALLATION User s Notes SERIES 4000 DPT 2 10 January 2002 MENSOR CORP SERIES 4000 DPT SERIAL COMMUNICATIONS SERIAL COMMUNICATIONS GENERAL The pressure to be measured is applied to the DPT pressure port as discussed in the Installation section If the DPT was ordered without relief valves the user must exercise caution to prevent excessive pressure on the sensor The allowable overpressure ratings by sensor range are presented in table 7 2 in the Specifica tions section Relief valves to provide overpressure protection are available from Mensor as optional devices All Series 4000 DPT models have an operating serial bus as the primary method of communication The bus is a two way communication path which requires a host computer or terminal to send various parameter settings to the DPT and to read back the instrument status For example through the serial port the user can change the resolution of the device reset the zero and sp
47. ctors psi K K KK 9 2 9 2 Temperature Conversion 0 9 3 9 3 Gas Density l eee 9 4 9 4 Liquid Density KK KK 9 4 9 5 Quick Reference List of Commands 9 6 X January 2002 MENSORO CORP SERIES 4000 DPT INTRODUCTION INTRODUCTION DID YOU GET EVERYTHING In addition to this manual you should have One Digital Pressure Transducer A 1 8 inch NPT fitting adapter two adapters where required One 4 pin female Bendix power connector Any accessories ordered Envelope containing a Calibration Certificate and a Warranty Certificate INITIAL INSPECTION Each transducer is subjected to many hours of functional testing before it leaves the factory In addition to testing each unit is inspected for appearance prior to being boxed When your transducer is removed from the carton please examine it for shipping damage Report any apparent damage to the carrier immediately GENERAL DESCRIPTION The Series 4000 Digital Pressure Transducer DPT is a rugged self contained pressure sensing device that provides high accuracy pressure measurements in the prescribed engineering units The transducer uses a high stability silicon sensor which is compensated over the specified temperature and pressure range A serial port is the primary communication link for all DPTs The DPT consists of the sensor and a set of printed circuit boards i
48. d Pressure Calculation The pressure at the input port P2 in figure 9 1 of the Device Under Test DUT will be a positive number if the Pressure Standard is positioned higher than the DUT If the Standard is lower than the DUT the head pressure correction will be a negative value The equation used to calculate the head pressure for a gas medium is P2 P1 1 h x Dpsi h Difference in vertical height between the center lines of the two pressure ports Dpsi Gas density refer to the Gas Density table Pressure Standard h in inches Device Under Test Figure 9 1 Head Pressure Calculation To calculate head pressure for a liquid medium the equation is P2 Pi hxD MENSOR CORP January 2002 9 5 APPENDIX QUICK REFERENCE LIST OF COMMANDS Table 9 5 SERIES 4000 DPT Command ADDRESS ADDRESS ANA_SPAN ANA_SPAN ANA_ZERO ANA_ZERO DEFAULT DIGITS DIGITS DOC DOC ERROR FILTER FILTER 1D SPAN SPAN ZERO ZERO RANGENEG RANGEPOS SAVE2MEMORY SPAN SPAN TARE TARE TYPE UNITS WINDOW WINDOW ZERO ZERO These commands are volatile and will be lost at the next power down unless followed by the SAVE2MEMORY command 9 6 January 2002 MENSOR CORP SERIES 4000 DPT APPENDIX BASIC LANGUAGE SAMPLE PROGRAM Set device
49. des instructions for determining the density of the pressure medium and how to calculate the head pressure effect Gas Density Table 9 3 Liquids and gases have mass and are affected by gravity The extent of the effect is dependent upon the density of the pressure medium Liquids normally have a constant density that does not change with pressure Gases however increase in density as the pressure increases To determine the density of a gas at a specific pressure multiply the absolute pressure by the density from the following table For gas the head pressure difference due to temperature changes within the compensated temperature range will be insignificant Gas O 23 C Density per psi in pounds in Dpsi Air Dry 2 9315 X 109 Argon A 4 0443 X 10 Carbon Dioxide CO2 4 4824 X 10 Helium He 4 0466 X 10 Hydrogen H2 2 0379 X 10 Nitrogen N2 2 8355 X 10 Liquid Density Table 9 4 In the table below the density of water at various temperatures is given The density of a liquid is commonly specified in grams per milliliter 8 m1 To convert to gt S cu in multiply the density by 0 036127292 Liquid Density pounds in D Pure Water 15 C 0360958 Pure Water 20 C 0360624 Pure Water 25 C 0360213 Pure Water 30 C 0359708 Pure Water 35 C 0359126 9 4 January 2002 MENSOR CORP SERIES 4000 DPT APPENDIX Hea
50. di Petai ker Model 4030 only 512 SERIAL PORT OPTION PORT ANALOG PORT E ra S E PRECISION INSTRUMENTS amp SYSTEMS 78666 512 396 4200 SAN MARCOS TX ji 2 52 6 40 cm 156 Dia 40 cm 4 Holes oeloes Figure 1 1 DPT Outline MENSOR CORP January 2002 1 3 INTRODUCTION SERIES 4000 DPT Parallel Output Models 4X10 4X11 4X50 For models which include the parallel port the pressure values are also output to the 36 pin connector added to the options mounting plate See table 2 1 in the Installation section for the pin outs The pressure value sent to this port is continuously updated The port has a one line BUSY flag to indicate that the values are being processed which then goes off low when the conversions are complete and the numbers are valid CIRCUIT BOARDS 1 4 A D Circuit Board The A D Analog to Digital Converter circuit board and the sensor together form a Characterized calibrated removable module Specifically the A D circuit board a Receives the external input power to the system isolates it and converts it to the required internal operating voltages b Stores the unique identity and calibration data for the sensor c Digitizes the analog temperature and pressure readings from the sensor d Transmits the temperature and pressure data to the Micro Computer circuit board in serial format Micr
51. e character address is the next character Optional field data enclosed in square brackets is optional Variable length field Query operator When this operator precedes a lf the DPT will transmit a response string Global address all DPT addresses will respond in most instances Address Command string Delimiter Comma space and tab are valid delimiters Data string A delimiter is required between the command query string and the data string E Error detected by the transducer Error messages are discussed under Remote Responses in this section lt cr gt Carriage return appears before lt lf gt in all responses from the transducer s lt lf gt Linefeed terminates all command strings queries and responses n Number string for one or more decimal characters PP Password Pre qualifier Required by some commands Di 043 oao NOTE There are three confidential password pre qualifiers see the insert inside the back cover To change the Span Zero or Tare calibration values or the date of calibration in non volatile memory involves a three step process 1 Send the appropriate password pre qualifier command Example 3PP lt LF gt This enables the DPT at address 3 to accept an appropriate calibration command 2 Send the required calibration command and the new value Example 3 ZERO 0021 lt lf gt This adds 0021 to all output values at address 3 3 Send SAVE
52. eries Parallel Resistors Required No Yes Signal Speed Serial Slow Parallel Faster Maximum Distance aa 4 000 ft 1 220 m Maximum DPTs 36 32 Up to 36 DPTs can be included in an RS 485 setup if a repeater is used 3 14 January 2002 MENSOR CORP SERIES 4000 DPT SECONDARY OUTPUTS SECONDARY OUTPUTS GENERAL While the serial port is the primary communication path most DPTs also incorporate an alternate or secondary output format This section presents the operating instructions for each of these alternate outputs including any serial commands which are unique to the particular output Examples of serial commands are shown formatted for RS 232 operation The same commands are also available for RS 485 operation but in slightly altered form More information is provided in Section 3 Serial Communications Table 4 1 Type of Secondary Output by Model Number Models Type of Output 4X10 4X11 4X50 Binary Outputs Parallel Output 4030 Available with RS 232 only Analog Current Output 4X40 4X41 4X42 and 4X43 Analog DC Voltage Outputs 4 TO 20 mA OUTPUT MODEL 4030 An optional Current Output DPT Model 4030 provides 16 bits of cur rent output resolution via a 4 to 20 mA signal proportional to the full scale pressure range This signal is continually updated at a rate of ap proximately 18 times per second and is live at all times regardless of any activity on t
53. essure instru ments This service includes a Certificate of Compliance and Calibration and the record of traceability to the pressure standards of the National Institute of Standards and Technology NIST Call 1 512 396 4200 or 1 800 984 4200 USA only for details and prices MENSOR CORP January 2002 5 1 MAINTENANCE User s Notes SERIES 4000 DPT 5 2 January 2002 MENSOR CORP SERIES 4000 DPT CALIBRATION CALIBRATION The Digital Pressure Transducer automatically adjusts the pressure readings for the effects of temperature and non linearity within the calibrated temperature range of 15 45 C The process is referred to as dynamic compensation because each reading is so computed before it is output to the communication bus Thus a calibrated DPT operated within its temperature band and with proper zero and span settings will provide accurate pressure measurements The DPT should have the span verified periodically to insure its stability Initially the recommended period between calibrations is 180 days This period may be extended as confidence is gained in the stability of the transducer As with any precision measuring device it is good practice to characterize its long term performance by maintaining a permanent record of its periodic condition Simply record the date the value of the zero offset and the span factor into a permanent log by serial number each time the unit is calibrated The log
54. eturned value will be in exponential notation such that 100 psi would return as 1 000000e 002 SAVE2MEMORY This command saves the configuration and calibration parameters which are in RAM to the non volatile memory The SAVE2MEMORY command is required after any change to span zero tare or any default condition if such a change is intended to be permanent Any change which is made and not followed with this command is stored in RAM only where it will be erased at the next power down whether deliberate or accidental bsave2memory lf Saves current values to non volatile memory for address B SPAN span scale factor requires master password This command sets the span scale factor in RAM for the specified transducer The span scale factor is a multiplier used to correct for span shifts The valid range of scale factors is 9 to 1 1 up to 6 digits of resolution If the data field is not included the span scale factor will default to 1 0 The SPAN command does not work with the global address operator In the following examples insert the required password for PP Examples 1PP Span 99998 lf Set the span multiplier to 99998 for address 1 5PP span 1 0021 lt If gt Set the span multiplier to 1 0021 for address 5 MENSORO CORP January 2002 3 11 SERIAL COMMUNICATIONS SERIES 4000 DPT NOTE The SAVE2MEMORY command must follow to save the new span factor to non volatile memory Query 5s
55. fset is different for an absolute transducer than it is for a gauge or differential unit Once the zero offset is known the procedure for sending the zero correction value which sets the DPT output to zero is the same for either type of transducer 6 4 January 2002 MENSOR CORP SERIES 4000 DPT CALIBRATION Gauge Differential Zero Offset Substitute the required password prequalifier in place of PP in the following examples 1 Determine the current zero offset and make a note of the returned reading Send 1ZERO lt Ilf gt This reading can be used at a later date to detect a zero change between calibrations Vent the PRESSURE and REFERENCE ports to atmosphere The true pressure is now O zero Send 1PP ZERO O lt lf gt This will clear the current zero offset from RAM Determine the current pressure reading Send 1 lt lIf gt Make a note of the reading returned by the DPT Subtract the current pressure reading from the true pressure zero The difference is the new zero offset required Example For a 0 30 psi unit with both ports vented True Pressure O vented Current Pressure reading from step 4 0 0023 psi True Pressure Current Pressure New Offset 0 0000 0 0023 0 0023 psi offset Enter the new offset into memory Send 1PP ZERO 0023 lt If gt The new offset of 0 0023 will now be added to all pressure readings of the target DPT To check the zero correction Send 1zero l
56. he serial port nc nc Current Out Current Out 24 VDC Supply 24 VDC Supply Aa IA 2 SI S s Figure 4 1 Model 4030 Electrical End MENSORO CORP January 2002 4 1 SECONDARY OUTPUTS SERIES 4000 DPT Connect the pressure 24 VDC power and the signal output lines as described in the Installation section Refer to figure 2 3 in that section for variations on the barrier strip connections Notice that both the power and the signal lines are isolated to 500 VDC With pressure applied to the DPT the 4 to 20 mA signal can be measured as a voltage drop across the load resistor This resistor can be on either the plus or the minus leg of the signal line and should be a precision resistor with a value selected based on the voltage required A 250 ohm resistor will provide a 1 to 5 VDC output signal NOTE If there is a problem with signal noise install a good quality low leakage 0 1 uf capacitor across the load resistor Consult Mensor if problems persist Current Alarms The current output has a normal range of 3 9 to 20 1 mA to account for minor under or overpressure conditions When the pressure exceeds these limits an alarm condition will occur An underrange will cause the output current to drop to approximately 3 5 mA An overpressure will cause the output to rise to approximately 20 5 mA In either case the output will stay fixed at the alarm value until the out of ra
57. ilter percentage applied to the output pressure values See the WINDOW command Valid filter percentages are 0 99 Follow with SAVE2MEMORY command to make the new value perma nent Filter formula If within the filter window new value old value x filter current value x 1 filter If outside the filter window no filtering is applied displayed value current value Examples Filter 99 lt lIf gt Sets all transducers to 99 filter 9filter 80 lt If gt Sets the filter to 80 for address 9 XFilter 95 lt lf gt Sets the filter to 95 for address X Query 3Filter 1f Returns the current filter value for the DPT at address 3 This command returns the DPT ID string The ID return string consists of Company name Instrument Model Serial Number the software version number and a linefeed In the following example X represents a variable digit ID return string addr MENSOR DPT AXXX SN XXXXXX VER X XX lt If gt January 2002 MENSOR CORP SERIES 4000 DPT SERIAL COMMUNICATIONS RANGENEG Returns the lower limit of the range in the engineering units assigned to the addressed DPT Value is normally zero except that a bi directional transducer Model 4043 will return a negative value The returned value will be in exponential notation such that 10 psi would return as 1 000000e 7 001 RANGEPOS Returns the upper limit of the range in psi regardless of the assigned engineering units The r
58. ingle transducer setup the RS 232 TRANSMIT line of the host is wired to the DPT RECEIVE pin and the DPT s TRANSMIT line is wired to the host s RECEIVE pin Both ends share a common ground line Figure 2 5 shows the wiring required for a multi transducer system for up to 36 DPTs HOST O e 2 RXD o 3 TXD o O NOTES 1 Connectors are female shown from the wired end o o 5 2 If a DPT is removed from the loop then pins 2 OF 7 and 3 of the vacated connector must be jumpered for the remaining DPTs to communicate pes Slo o o 3 O O O o gt ppt e SIS OND J e A s 2 3 5 00000 DPT 1 9999 Figure 2 5 RS 232 Multi Drop Wiring MENSOR CORP January 2002 2 5 INSTALLATION SERIES 4000 DPT 2 6 RS 485 Serial Port Models 41XX RS 485 operation uses a female 9 pin D Sub connector at J2 rather than the male connector used for RS 232 The connector pin outs for RS 485 operation are shown in figure 2 6 LU Z FUNCTION Transmit data A Receive Data B Receive Data A No connection Signal Ground No connection No connection No connection Transmit Data B 9 PIN FEMALE D SUB CONNECTOR Viewed from rear of instrument Q00 N 9 I Q N Figure 2 6 J2 Pin outs for RS 485 RS 485 Cable Models 41XX The RS 485 DPT can operate as either a two wire or a four wire bus These two cable configurations are illustrated in figures 2 7 and 2 8 respectively
59. ist 5 2 uu sd euros den A 48 2 4N a bal 9 6 RS 232 Commands for Current Output ees 4 2 Serial Commands for Analog Output KK ess 4 3 String Format xo o OX Se Te ed OX NIS ee ee S E s 3 5 Commands Listing of PE QUETY oi kn an Be ea Rr Dy RR n a Des LC in t dr OR G r de Je M un de De IC Ga d 3 6 ADDRESS rz lt eu Res mete ww bw quim eoe red gestr rye rues gs 3 6 NA SPAN nne itte qi Rn sre Ye Br ru DAS Bear gets hei ode Rr e dz to 4 3 ANA ZEROS Gom rr hok a somnia ie cub o OR SUM e cba de n ed 4 4 DEFAULT M R D L MD uw eo a eft eu er EE ICI RE NOUS RE Ge ee 3 7 ecc LL uL A de gi 3 7 DOC Date of Calibration llle 3 8 ERRORS la uae xe Gate 9 mE XU VEA Eurus M uie Se uu ux 3 8 3 9 FILTER 3 Gig 4 ATE wu r 2e a n lA I dg ped Ru dues 3 10 IGSPAN ce ra wow sue ee apre By Me e ura ut s Uo EM ru e OPE o ees icio Pa T d 4 2 ZERO El ans fw elk ue Re gue Eu eese ge Bose itus 4 2 aC UTTT 3 10 RANGENEG 44h RA UR A we Eu e Wa UE DE 3 11 RANGEPOS uoo ia xw eum e ou esum fos esee ve aie let ed aye he os el t 3 11 SAVE2MEMORY JP si S mee ver OE ens OR Pe EN OPE E 3 11 SPAN ohie T Erk AA de ede Ete A ke BG Hide hk Ae Ske xm 3 11 TARE lt Ain ce r Qe dn re o ades Seles ae ag he di Ra ae tend 3 12 TYPER i e due e opuesto ae HHHH HHHH is ete a HH HHH 3 12 UNITS te vis bora vue bere dace Br iota Dre dins n erre ae ce RY fol e Rete aes en by fal
60. it 8 Digit 8 7 Digit 16 Digit 16 Digit 10 8 Digit 32 Digit 32 Digit 20 9 Digit 64 Digit 64 Digit 40 10 Digit 128 Digit 128 Digit 80 11 Digit 256 Digit 256 Digit 100 12 Digit 512 Digit 512 Digit 200 Continued on next page 2 8 January 2002 MENSOR CORP SERIES 4000 DPT Table 2 1 continued INSTALLATION Two s Complement Straight Binary Function BCD Function Pin Function 4X10 4X11 4X50 13 Digit 1024 Digit 1024 Digit 400 14 Digit 2048 Digit 2048 Digit 800 15 Digit 4096 Digit 4096 Digit 1k 16 Digit 8192 Digit 8192 Digit 2k 17 Digit 16384 Digit 16384 Digit 4k 18 Sign O pos 1 neg Digit 32768 Digit 8k 19 reserved reserved Digit 10k 20 reserved reserved Digit 20k 21 reserved reserved Digit 40k 22 reserved reserved Digit 80k 23 reserved reserved Digit 100k 24 reserved reserved reserved 25 reserved reserved reserved 26 reserved reserved reserved 27 no connection no connection no connection 28 no connection no connection no connection 29 no connection no connection no connection 30 no connection no connection no connection 31 no connection no connection no connection 32 BUSY 0 ready 1 busy BUSY 0 ready 1 busy BUSY 0 ready 1 busy 33 no connection no connection reserved 34 no connection no connection reserved 35 no connection no connection no connection 36 no connection no
61. l Model 4X42 to 1 VDC out for bi directional pressure Model 4X43 AO In addition the Analog Board supports two potentiometers used to adjust the analog signal zero and span The two pots are normally mounted on the PC board and are adjusted through two screwdriver access holes in the Options Cover Plate see figure 1 1 The customer can request that these two pots be externally mounted such that they can be panel mounted at the user s site In either case these two pots are used to adjust the analog output signal end points to agree with the calibrated pressure input The customer can also use remote commands for adjustment With the analog zero and span set to the proper values the output voltage on pins A and B of J1 will be directly proportional to the applied pressure The formula to derive the measured pressure from the output voltage is output voltage analog span x pressure span measured pressure The following example shows output voltages for two pressure values using a O to 250 psia full scale transducer with a 10 VDC analog signal MENSOR CORP January 2002 6 9 CALIBRATION SERIES 4000 DPT Analog Output True Pressure 0 5868 volts 14 67 psia 5 0000 volts 125 000 psia NOTES 1 The Model 4X43 1 VDC out zero and span adjustments are different than on the unipolar models 4X40 4X41 and 4X42 Normally the zero pot is adjusted near zero voltage pressure and the span pot near full scale voltage p
62. le pipe fitting Do not use thread sealants on fittings sealed with an o ring The integrity of the seal is particularly important since even microscopic leaks can cause errors in pressure measurements NOTE When making up connections to the o ring adapter use a back up wrench to prevent overstressing the aluminum pressure port threads ELECTRICAL CONNECTIONS 2 2 Connector J1 Wiring J1 Jl is a round 4 pin male connector fig A D ure 2 2 Power is supplied to pin C 10 to 18 VDC and pin D power ground Power ground is isolated from the DPT B 5 case and from signal ground This allows DPTs powered by various DC systems to share a common signal path A mating connector Bendix PT O6A8 4SS is supplied with this connector 4 PIN MALE BENDIX PT02H 8 4P PIN CONNECTIONS Pins A and B of J1 are used for the analog BS ANRECS QUID MES voltage output on models 4X40 4X41 B ANALOG OUTPUT MODELS 4X4X 4X42 and 4X43 C 10 TO 18 VDC POWER INPUT D POWER GROUND Figure 2 2 Connector J1 Wiring January 2002 MENSOR CORP SERIES 4000 DPT INSTALLATION Barrier Strip TB1 Wiring Model 4030 On a Model 4030 4 to 20mA output a barrier strip replaces the J1 connector The barrier strip terminal functions are 1 Input Power 18 28 VDC nearest the mounting flange 2 Power Ground 3 Current Output Loop positive side 4 Current Output Loop negative side 5 no connection 6 no connection P
63. n An addition of specific materials processes or devices to counteract a known cause of error Deadband The change through which the input to an instrument can vary without causing a change to the instrument output Differential Pressure The difference between the measured pressure and a fixed reference pressure See also Pressure Relationships Drift Any change in output over a period of time which change is not a function of the pressure being measured See also Stability ElA 232 A serial data communication path between instruments which conforms to the standards defined by ANSI EIA 232 D 1986 Interface Between Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE Employing Serial Binary Data Interchange Commonly known as EIA 232 formerly RS 232 the standard is available from Electronic Industries Association Engineering Dept 2001 Eye Street N W Washington D C 20006 ElA 485 A serial data communication path between instruments which conforms to the standards defined by ANSI EIA 485 1983 Standard for electrical characteristics of generators and receivers for use in multipoint systems Commonly known as EIA 485 formerly RS 485 the standard is available from Electronic Industries Association Engineering Dept 2001 Eye Street N W Washington D C 20006 Elevation The vertical height from mean sea level especially of a point on the earth s surface used in making local corrections
64. n a model 4030 The user must provide the power source and a terminal or computer to communicate with the DPT OPERATIONAL DESCRIPTION Sensor The DPT sensor is secured to the A D circuit board The sensor is a micro machined silicon wafer that responds to pressure in a predictable manner The sensor s signals are output to the signal conditioning electronics on the old circuit board Communications Serial In Out All Models In operation the serial port RS 232 or RS 485 is used to return measured pressure values in the pressure units that were specified on the customer s order and transducer information to the user This port is also used to transmit calibration adjustments and other user functions to the DPT 1 2 January 2002 MENSOR CORP SERIES 4000 DPT INTRODUCTION Current Output Model 4030 Current output models pressure transmitters output a 4 to 20 mA signal to cover the full span of the pressure range This model requires an external 24 VDC power source whereas all other model DPTs run off a 12 VDC source Analog Voltage Output Models 4X40 4X41 4X42 4X43 Analog voltage output models include the high and low analog output signal lines on two pins of the four pin power connector In addition two potentiometers are included to adjust the analog zero and span values lt 4 21 10 69 cm Option Cover Plate Ref Port Included only on units less than 15 psig NERI 5 085 12 92 cm EEE En
65. nge pressure condition no longer exists RS 232 Commands For Current Output The Model 4030 responds to all of the commands listed previously in the Serial Communications section of the manual The following commands are additional commands that are unique to the Model 4030 and are used to calibrate the 4 to 20 mA signal Other models which receive these commands will return an error message I_SPAN lt n gt Loads current output span calibration correction where n is a real number representing the slope change from nominal 1 0 For more information see Calibrating Current Output in the Calibration Section I_ZERO lt n gt Loads current output zero calibration correction where n is a real number representing current change in mA For more information see Calibrating Current Output in the Calibration Section 4 2 January 2002 MENSORO CORP SERIES 4000 DPT SECONDARY OUTPUTS ANALOG OUTPUT Models 4X4X The optional Analog Output supplies a DC voltage output that is directly propor tional to the pressure input This output is available on pins A and B of the four pin power connector J1 see figure 2 2 The analog signal is set at the factory to one of the following ranges O to 10 VDC out standard Model 4X40 O to 5 VDC out optional Model 4X41 O to 1 VDC out optional Model 4X42 to 1 VDC out for bi directional pressure Model 4X43 morc The output voltage on pins A and B of J1 will be di
66. nside an aluminum housing see the Block Diagrams figures 1 2 through 1 4 The outside of the housing supports the pressure input port s and the power and signal connectors A DB 9 connector for a serial port is standard on all DPTs figure 1 1 This connector is male for a standard RS 232 port Models 40XX or female for the optional RS 485 port Models 41XX Models 4X10 4X11 and 4X50 have an additional 36 pin telephone style connector for a parallel port Model 4030 a Digital Pressure Transmitter with a 4 to 20 mA output uses a six position barrier strip rather than a power signal connector see the inset in figure 1 1 Models 4X40 4X41 4X42 and 4X43 provide an analog voltage output and MENSORO CORP January 2002 1 1 INTRODUCTION SERIES 4000 DPT include two screwdriver openings for signal adjustments Table 1 1 lists all of the DPT models and their secondary outputs Table 1 1 Models Model Serial Port Additional Output 4X10 RS 232 or RS 485 Two s Complement Binary 4X11 16 Bit Binary 4X20 None Serial out only 4030 RS 232 only 4 20 mA Analog 4X40 RS 232 or RS 485 0 10 VDC Analog 4X41 i 0 5 VDC Analog 4X42 0 1 VDC Analog 4X43 i 1 VDC Analog 4X50 Binary Coded Decimal BCD The DPT requires either a 12 VDC power source wired into the mating four pin connector supplied with the transducer or a 24 VDC source connected to the barrier strip o
67. nt Filter window code 0 FS 01 FS default 02 FS 04 FS 08 FS 16 FS 32 FS 64 FS NOUR N Examples EWindowv 4 lt lf gt Sets the filter window to 08 FS for address E Queru 5window lt lf gt Returns the current filter window value of the DPT at address 5 ZERO offset value requires zero password This command sets the zero offset for the specified transducer The zero offset is added to all output values to correct for zero shifts The valid range of zero offsets is 1 0 to 1 0 FS If the data field is not included the default zero offset O is loaded Examples 2PP Zero 001 lf Adds 001 to all output values of address 2 6PP zero 0021 lf Adds 0021 to all output values of address 6 MENSOR CORP January 2002 3 13 SERIAL COMMUNICATIONS SERIES 4000 DPT NOTE The SAVE2MEMORY command must follow to save the new zero offset to non volatile memory Query 5zero lt lf gt Returns the current zero offset value of the DPT at address 5 RS 232 RS 485 DIFFERENCES Some of the differences between RS 232 and RS 485 are listed in the table below Table 3 1 RS 232 and RS 485 Differences RS 232 RS 485 Model Numbers 40XX 41XX J2 Serial Port Connector DB9 Male DB9 Female Start of Message Character H Global Address Operation Messages are echoed No echo Global Queries Multiple DPTs OK Single DPT only Multi drop Cable S
68. nt Option Four 0 156 dia holes on 1 500 x 4 000 centers 7 2 January 2002 MENSORO CORP SERIES 4000 DPT SPECIFICATIONS lt 4 21 10 69 cm ME Option Cover Plate Ref Port Included only on units less than 15 psig 5 085 12 92 cm Em End Panel for Model 4030 only E 4 o a d ES 4 Hi OPTION PORT ANALOG PORT 156 Dia 40 cm 4 Holes ol S S S WE S S S Figure 7 1 Outline and Dimensions Surface Mount MENSOR CORP January 2002 7 3 SPECIFICATIONS SERIES 4000 DPT Power Input Requirements Nominal 12 VDC 10 to 18 volts 200 mA maximum except Model 4030 Note See Other Outputs in this section for input power requirements for the Model 4030 4 20 mA current output Table 7 1 Power Input to J1 Pin Description A Model 4X4X Analog Out B Model 4X4X Analog Out C 12 VDC 10 18 volts D Power Ground DC Power Connector Connector J1 4 pin Male Bendix PTO2H 8 4P Pneumatic Interfaces 7 16 20 female SAE ports per MS16142 and SAE J514 table 14 in high strength aluminum block Overpressure Limit Table 7 2 Overpressure Rating of Pressure Port Sensor Range Overpressure 0 36 to 2 0 psi 5 psi 2 1 to 7 5 psi 20 psi 7 6 to 16 psi 45 psi 17 to 40 psi 60 psi 41 to 100 psi 200 psi 101 to 250 psi
69. o Computer Circuit Board The Micro Computer is the system brain All of the information flowing into and out of the transducer is processed here The Micro Computer circuit board a Receives the serial temperature and pressure data from the A D circuit board b Integrates the temperature and pressure signals into a true pressure signal according to the sensor s unique temperature characteristic and c Processes the data and all communications through the serial port and sends the data to an optional I O circuit board January 2002 MENSORO CORP SERIES 4000 DPT INTRODUCTION I O Circuit Board Models 4X10 4X11 and 4X50 The optional I O input output circuit board is a programmable device which is set up to output data in a specific parallel format see figure 1 2 The I O circuit board Pressure Input a lt Receives data from the Micro Computer circuit board and converts this into parallel data and Provides the binary output and accessory lines to the external 36 pin connector J3 mounted on the option cover plate see figure 1 1 A D PCB Ji 5 12V 9 ND 500 VDC 10 18 VDC r ae SENSOR Conv e Gnd Isolation p Input SENSOR B 11 No Con re E A nection Converter l l L 1 J2 JP2 MICRO COMPUTER Serial PCB Bus AC PCB EXPANSION BUS INPUT OUTPUT sd J3 OPTION PCB Models 4X10 Parallel BCD or 4X11 Output Binary
70. olate the vacuum line To calibrate the 4 20 mA current output Model 4030 or the analog voltage output Models 4X4X a high accuracy digital multi meter DMM is also re quired PRESSURE STANDARD Mensor recommends the use of appropriately accurate primary pressure stand ards when calibrating this instrument Such standards should be sufficient so that when the techniques of the ISO Guide to the Expression of Uncertainty in Measurement GUM are applied the instrument meets its accuracy statements as required by ANSI NCSL Z540 or other applicable standards The same requirement applies to the vacuum standard used to set the zero offset The recommended absolute pressure value for setting the zero offset is 2300 mTorr CALIBRATION MEDIUM The recommended calibration medium for sensors up to 2500 psi is dry nitrogen Hydraulic media water or oil for example are recommended for ranges above 2500 psi Hydraulic media also can be used with lower ranges however special techniques must be used in filling the connection lines and transducer Note that the specifications given in this manual are for gas media unless otherwise stated CALIBRATION PROCESSES Figure 6 1 illustrates typical setups for calibrating an absolute or gauge pressure DPT Calibration of the zero and span values over the serial port for a standard DPT is explained next followed by a discussion on how to calibrate the 4 to 20 6 2 January 2002 MENSOR CORP SERIE
71. om the wired end DPT 1 To case Figure 2 8 Four Wire RS 485 Cabling J2 MENSOR CORP January 2002 2 7 INSTALLATION Parallel Port Models 4X10 4X11 and 4X50 2 9 on the options mounting plate 36 PIN FEMALE AMP 555119 WITH BAIL LOCKS Viewed from rear of instrument Figure 2 9 J3 Parallel Port Connector The parallel port of a Model 4X10 is configured for two s complement binary output Model 4X11 is configured for straight positive binary output and Model 4X50 provides a binary coded decimal BCD output In each case these signals are always present at the connector and cannot be multiplexed All parallel output models require one cable and one terminal for each DPT Table 2 1 gives the pinouts for the various configurations of the 36 pin connector Section 4 SERIES 4000 DPT A DPT with a parallel output option includes a 36 pin female connector figure Secondary Outputs provides the functional descriptions Table 2 1 J3 Pin Functions Two s Complement Straight Binary Function BCD Function Pin 4 Function 4X10 4X11 4X50 1 5 VDC out 100 mA 5 VDC out 100 mA 5 VDC out 100 mA max fused for 1 8 Amp max fused for 1 8 Amp max fused for 1 8 Amp 2 Digital Common Digital Common Digital Common 3 Digit 1 Digit 1 Digit 1 4 Digit 2 Digit 2 Digit 2 5 Digit 4 Digit 4 Digit 4 6 Digit 8 Dig
72. ompensated tse saa REM Gee pr RO ES ee Beya Ge el Ert aee ave d a Rr ee re 2 7 5 Operating p ane sn oo HHH We he es SSR HHHH hs oa 7 5 Storage ia S haa eA Se e ee aes y lk av Ae Us ee Hae de an n 7 5 Trademarks 4 27120 4400 tad a deu oos d Ded P Acad um Bla See Bc Ae UR d DM om eee A iii Two s Complement Binary Output K K K K K K K 2 9 2 9 4 5 9 8 TYPE Query 2 90 e uuo eek e da eue hue ee hm dar toe oet Ad ede 3 12 Units Engineering Measurement Pressure 1 1 1 2 3 11 7 5 9 2 UNITS Query ac mx um abge DRA IRE K A HP IARE MUR LO MO POR on xe 3 12 9 6 V Valves Relief xo dog ah e us un D du NU Kee o eus eur bU ER No d 7 4 8 1 Volume Internal clavo see ule statue areca Reta eue Ee XII e qe NIIS AC qe SIUS VUE RIP de 7 6 MENSORO CORP January 2002 INDEX SERIES 4000 DPT W Warn up vied a ROSE da AE AR Ga ba eae we dae eke ah de Bs 7 5 Warnings and Caution Notes 6 we ee iii 4 4 WaLiTo mg ii 5 1 Weights ota den eyd abe te da A dla arta dea rada AL 7 2 WINDOW Command e 3735414 da e a abe lg a dme d 3 13 Z Zero Adjustments i 2 24 994 o hah NEDAN ee ah Bah ee ba Eres 6 4 Absolute Zero Offset Vt 2 0 0 bata 24 Oar had A AAA gh hard Ju 6 6 Gauge Differential Zero Offset K KK K K K K K K o 6 5 ZERO Command to A A e Gs 3 13 11 8 January 2002 MENSOR CORP
73. pan lt lf gt Returns the current span scale factor value of the DPT at address 5 TARE tare offset requires tare password This command sets the tare offset in RAM for the specified transducer The valid range of tare offset is 17 0 psi If the data field is not specified the default value of 0 0 is used The tare password must be substituted for PP Examples 8PPtare 14 5 lt lf gt 14 5 psi will be added to transducer 8 s output PPTare lt lf gt Clears the tare offset for all transducers NOTE To enter a new tare value in non volatile memory the above command must be followed by SAVE2MEMORY Query 5tare lt lf gt Returns the current tare offset value of the DPT at address 5 TYPE This query returns the transducer type in character form A for absolute D for Differential and G for Gauge OTYPE lt If gt Returns the transducer type of the DPT at address 0 UNITS This query returns a pressure units number code from 1 to 34 This code corresponds to the number in the CODE column of table 9 1 in the 3 12 January 2002 MENSOR CORP SERIES 4000 DPT SERIAL COMMUNICATIONS Appendix The number determines what pressure units were set in the DPT when it left the factory WINDOW filter window code This command sets the filter window of the selected transducer to the value represented by filter window code Use SAVE2MEMORY to make the new filter window value permane
74. parallel output configurations are given below CAUTION NO OVER UNDER PRESSURE INDICATOR THERE IS NO PROVI SION FOR OVERPRESSURE NOR UNDERPRESSURE INDICATION IF THE BINARY OUTPUT IS PEGGED AT ITS MINIMUM OR MAXIMUM VALUE THE PRESSURE MAY BE OUTSIDE THE FULL SCALE RANGE OF THE DPT 44 January 2002 MENSOR COPP SERIES 4000 DPT SECONDARY OUTPUTS Model 4X10 Two s Complement Binary Output The 36 pin connector pinouts for two s complement binary output are shown in the first column of table 2 1 All of the data lines pins 3 through 18 and pin 32 are positive logic TTL level signals capable of driving one TTL load Data lines 3 through 17 provide the pressure value If line 18 is high the pressure is positive or if low the pressure is vacuum in two s complement format A discussion of binary two s complement is included in the Appendix If the BUSY line pin 32 is high logic 1 the DPT is updating data and the output is ambiguous When the BUSY line goes low the pressure data lines are valid The binary range is from 32767 to 32767 to express the proportional full scale pressure range In this configuration 0 0 gauge pressure is indicated by all zeros lines 3 through 18 and line 32 all low Model 4X11 Binary Output The 36 pin connector pinouts for straight binary output are shown in the middle column of table 2 1 All of the data lines pins 3 through 18 and pin 32 are positive logic TTL level signals
75. ple in the field of precision pressure measurement and control The company s founders previously worked in various capacities in the Pressure Instrument Group of Texas Instru ments including engineering production and marketing These founders were involved in the design of the original quartz bourdon pressure gauge at TI Mensor s CEO Jerry Fruit is co holder of the patent on using a fused quartz bourdon tube to accurately measure pressure The 50 current full time Mensor employees have an average longevity of fourteen years That s a lot of pressure experience PRODUCTS Mensor s portfolio of products consists of an extensive line of precision pressure instruments including digital gauges pressure controllers transducers and pressure cali brations systems All of these products feature computer interface capability Mensor prod ucts are used in metrology labs calibration labs research facilities engineering offices production test stands and in other environments where high accuracy pressure measure ment and or control is required Many of these products include customized features to meet a customer s specific requirement Mensor products range from about 900 to 30 000 CUSTOMERS Typical Mensor customers are pressure sensor manufacturers aerospace firms jet engine manufacturers electric utilities nuclear power plants pharmaceutical firms calibration laboratories government agencies and research organizations APPLICATIONS
76. ransmitted over the bus To check the span reading Send 1SPAN lt lIf gt The pressure reading returned should be 150 003 psi if the pressure has not changed Save Send 1SAVE2MEMORY lt LF gt MENSOR CORP January 2002 6 7 CALIBRATION SERIES 4000 DPT CALIBRATING CURRENT OUTPUT Model 4030 Figure 6 1 illustrates a typical calibration setup With all of the equipment in place follow the steps given below in sequence 1 Correct the pressure zero and span readings over the serial bus to agree with calibration standard as explained under Zero Offset and Span Adjustment discussed above 2 Connect device to a calibrator meter to read current output 3 Set Zero pressure and make the current output Zero intercept correction in mA by using the I ZERO command Example If the current is reading 4 00123 mA the command addr I ZERO 0 00123 should be sent over the serial bus This adjusts the reading in the negative direction Zero corrections are additive The value of zero correction can be read by querying the serial port with the command addr 1 ZERO The return string will be similar to addr CURRENT OUT ZERO 1 230000e 003 4 Apply full scale pressure and make current output Span correction by using the I SPAN command Example If the current is reading 19 99950 mA the span correction nominal value is 1 0 is calculated by the equation 20 00000 19 99950 1 000025 This slope cor
77. re is changed from the nominal compensated temperature mid range of the stated compensated temperature range to the compensated temperature extremes MENSOR CORP January 2002 10 5 GLOSSARY SERIES 4000 DPT Temperature Range Compensated The temperature range over which the instrument specifications are specified Temperature Range Operating The range of ambient temperatures within which the instrument will function and not suffer any damage or permanent change in characteristics Temperature Response The time required to stabilize and measure a temperature change Traceability Documentation of the existence of a calibration chain between an instrument and a primary standard Transducer A complete packaged measurement module that includes an input sensor a conversion process and a usable output A Mensor pressure transducer will sense pressure at its input transform it to an electrical signal condition the signal add some temperature compensation and output the result as either a digital or an analog electrical signal proportional to the input pressure True Value The correct or actual value of the quantity being measured Uncertainty The maximum credible limits for the difference between the true value and the measured value of the pressure under consideration Vacuum Pressure A pressure less than ambient barometric pressure See also Pressure Relationships Volume The cubic measure of all of the space beyond the
78. rection is then applied by sending addr I SPAN 1 000025 Span slope corrections are not additive such that if a value not equal to 1 0 is already stored as the slope correction the above equation will be in error The values that can be loaded with the I SPAN command are between 99 and 1 01 Therefore it is recommended that the span correction be considered or reset to 1 0 before making any new corrections To read the span correction value send the query addr I_SPAN The return string will look something like addr CURRENT OUT SPAN 9 999000e 001 To correct for this existing span value using the above measurements the equation would be 6 8 January 2002 MENSOR CORP SERIES 4000 DPT CALIBRATION 20 00000 19 99950 existing span value new slope correction or 20 00000 19 99950 9999 0 999925 NOTE Large span corrections can affect the zero offset If this occurs repeat steps 1 through 4 5 Save the values to non volatile memory by using the SAVE2MEMORY command ADJUSTING ANALOG VOLTAGE OUTPUT Models 4X4X The optional Analog Output circuit board supplies a DC voltage output that is directly proportional to the pressure input This output is available on pins A and B of the four pin power connector J1 see figure 2 2 The analog signal is set at the factory to one of the following ranges O to 10 VDC out standard Model 4X40 O to 5 VDC out optional Model 4X41 O to 1 VDC out optiona
79. rectly proportional to the applied pressure The formula to derive the measured pressure from the output voltage is output voltage analog span x pressure span measured pressure The following example shows output voltages for two pressure values using a O to 250 psia full scale transducer with a 10 VDC analog signal Analog Output True Pressure 0 5868 volts 14 67 psia 5 0000 volts 125 000 psia Serial Commands For Analog Output Models 4X40 through 4X43 respond to all of the commands listed previously in the Serial Communication section of the manual The following commands shown in RS 232 format are additional commands that are unique to these models and are used to calibrate the analog voltage signal Other models which receive these commands will return an error message ANA SPAN requires master password Loads an analog span correction factor to allow recentering of the span adjust pot For details see Adjusting Analog Voltage Output in the Calibration Section Examples ZdPP Ana Spar 1 01 lf Changes the analog voltage output such that a full scale voltage output of 10 0000 MENSOR CORP January 2002 4 3 SECONDARY OUTPUTS SERIES 4000 DPT volts for the DPT at address D would read 10 1000 volts This command does not affect the transducer s span setting as returned by the serial bus Query 3ANA_SPAN lt If gt Returns the value of the span correction factor for the analog span output voltage on the transducer
80. ressure The Model 4X43 requires that the zero pot be adjusted near 1 VDC and the span pot near 1 VDC 2 For analog outputs other than O to 10 volts the ANA_ZERO adjustment must be rescaled Table 6 1 shows examples of adjustments and the actual results Table 6 1 ANA_ZERO Adjustments Results Model Command Sent Scale Factor Actual Adjustment 4X40 ANA_ZERO 1000 1 0 0 1 volts 4X41 ANA_ZERO 1000 0 5 0 05 volts 4X42 ANA_ZERO 1000 0 1 01 volts 4X43 ANA_ZERO 1000 0 2 02 volts 6 10 January 2002 MENSOR CORP SERIES 4000 DPT SPECIFICATIONS SPECIFICATIONS Accuracy specifications presented herein are obtained by comparison with primary standards traceable to the National Institute of Technology NIST These specifications are obtained in accordance with the ISO Guide to the Expression of Uncertainty in Measurement GUM Mensor also adheres to ANSI NCSL Z540 If there is an exception to the requirements and recommendations of Z540 during a calibration the exception is noted on the individual calibration certifi cate Mensor reserves the right to change these specifications without notice MEASURE SPECIFICATIONS Accuracy 0 010 FS includes combined linearity hysteresis and repeatability over the compensated temperature range Precision 0 003 FS Calibration Stability Zero and Span 0 01 full scale maximum in 180 days Pressure Ranges Standard Psia 0
81. rimary operating power is connected between pins 1 and 2 of the barrier strip The power source must be capable of supplying 150 mA at 24 VDC This same power supply can be used to power the current loop or independent supplies can be used The two wiring diagrams below illustrate both power supply configurations CURRENT LOOP ON A COMMON POWER SUPPLY Model 4030 6 5 Load Resistor Bra 4 24 VDC Power t 3 Supply 2 Jor NOTE The load resistor can be on either the 24V or the Return side of the Power Supply Mode Ls TWO INDEPENDENT POWER SUPPLIES 4030 8 gt z Load Resistor 4 92 Return EG 3 T 24 VDC E F 2 12 Return en 1 TOL 24 VDC Supply 1 EA Figure 2 3 TB1 Wiring MENSOR CORP January 2002 2 3 INSTALLATION SERIES 4000 DPT Serial Port J2 Models 40XX RS 232 Serial Port Connections For RS 232 operation J2 is a 9 pin male D Sub connector Figure 2 4 shows the connector and the RS 232 pinouts U Z FUNCTION No connection Transmit data Output Receive Data Input No connection Ground No connection No connection No connection No connection 9 PIN MALE D SUB CONNECTOR Viewed from rear of instrument 0 N 9 QI gt Q N Figure 2 4 J2 Pin outs for RS 232 2 4 January 2002 MENSOR CORP SERIES 4000 DPT INSTALLATION RS 232 Cable Models 40XX In a s
82. ronmental Conditions Output The quantified result of a measurement Also referred to as indicated value or reading Overpressure Rating The pressure which may be applied to the sensing element or the case as specified of a sensor without damage to either the sensing element or sensor case as specified MENSOR CORP January 2002 10 3 GLOSSARY SERIES 4000 DPT Peak Pressure The greatest or if desired the least pressure sensed during a measurement session Precision The closeness of agreement between independent test results obtained under stipulated conditions Pressure Medium The fluid gas or liquid which comes in contact with the sensing element in the pressure chamber Pressure Rate An orderly change in pressure over a specified time Pressure Relationships The relationship of various pressure terms are illustrated in the following graphic Pressure L 4 Differential Pressure psid A oe RA ME Standard Atmospheric 5 Pressure 2 5 Zero ft altitude T Ha me 99 ma o 14 69595 psiA 28 s o 5 n o 29 9213 in HgA 0 C 2 9 3 lt 1013 250 millibars ey M 760 002 mmHgA A A Barometric L Pressure 760 002 torr e sla o 101 325 kilopascals E S E 33 9596 ftH20 20 C JR TA A E oo Values are approximate 5 S5la Refer to Pressure Conversion S 29 m Table in the Appendix m 2r 2 Absolute Reference Perfect Vacuum Figure 10 1 Pressure Relationships
83. s Lr 1 3 4 1 4 3 BID a Uwe queues ey A A a SEU DA y o dew 4 5 Current anis a erne Rs ir ene ay BA itte CUR By a a eza i en Be i am d 1 3 7 6 Digital 4 1 ur a oh a Gey ex dro Ars epee arcs Q wey eed dee on ate Jir at 2 9 6 4 Parallel uv a xU Ev da a e EVE we ECL Qa he we a 1 4 2 8 4 4 7 8 Secondary s ee decimum wee uv E ELO ge Ryle ge eed eer GUAE A 4 1 4 5 Seal nata orig eL a ds ds Sock aca we sa d 1 2 3 1 3 14 Two s Complement Binary 4 5 Voltage PM 7 6 OVELPLESSUTE 3 oos IA Be A A SI PS 3 1 4 2 4 4 7 4 P Packaging for Shipment s es cda c ena dca i lees iv Panel Mount Kit k eke jek ae Bae E TA A ete a DIA um eed UA Bore A 8 8 1 8 2 Parallel OM put SS 3 d 1 id T oues A A A 1 4 1 5 2 8 4 4 Block Diagram 4 uuo i42 wu hoe A WE A AA IS Se viru 1 5 Parallel Port 4 2 4 2 222 aca Ae dou RO do RR dL el A b W V2 de ud 2 8 4 4 Passwords ko ers 40di Ru to tees rate aut eres 3 4 3 8 3 11 3 13 4 3 4 4 Please Notice 4 moa w xi alya le a a od ee m gs Oe jS c WR Mee dk wl ek iii Pneumatic Interfaces 4 44 4 4 oos 7 4 POWOI 25 ab egy dw dira Xu A ode y wu b RE des Ec a deus 1 1 1 2 2 3 7 4 MENSORO CORP January 2002 11 5 INDEX SERIES 4000 DPT Input Requirements s zan oc 4d a zuo a od d od d ao ds 7 4 Power Supply even Bote yeti ERR un Rete O dese Acte am e one sed ite a GE cte dn e d 1 2 2 3 PRECISION DEV rac dod OO So SS edge M O ef Ae Sd soe ME
84. ssembly of the product in any manner performed without specific factory permission voids this warranty MENSOR CORPORATION MAKES NO WARRANTY OF ANY KIND WITH RE GARD TO THIS MANUAL INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Mensor Corporation shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material ii January 2002 MENSOR CORP SERIES 4000 DPT PREFACE WARNINGS AND CAUTION NOTES WARNING NOT EXPLOSION PROOF Installation of this instrument in an area requiring devices rated as intrinsically safe is not recommended CAUTION USE THE PROPER PRESSURE MEDIUM USE ONLY CLEAN DRY NON CORROSIVE GASES THIS INSTRUMENT IS NOT DESIGNED FOR OXY GEN USE CAUTION ESD PROTECTION REQUIRED The proper use of grounded work surfaces and personal wrist straps are required when coming into contact with exposed circuits printed circuit boards to prevent static discharge damage to sensitive electronic components PLEASE NOTICE The product specifications and other information contained in this manual are subject to change without notice Mensor Corporation has made a concerted effort to provide complete and current information for the proper use of the equipment If there are questions regarding this manual or the proper use of the equipment contact Mensor Corpor
85. t lIf gt The reading returned should be 0 0000 psi with both ports vented Save Send 1SAVE2MEMORY lt LF gt MENSOR CORP January 2002 6 5 CALIBRATION SERIES 4000 DPT 6 6 Absolute Zero Offset 1 Determine the current zero offset and make a note of the returned reading Send 1ZERO lt If gt Record this reading and date to track zero changes between calibrations Use the setup in figure 6 1 Evacuate and hold the sensor at approximately 300 to 400 millitorr Allow the system to stabilize at that pressure for from five to ten minutes Take the vacuum reading and convert it to an equivalent reading in psi Table 9 1 in the Appendix lists conversion factors This becomes the TRUE PRESSURE reading Clear the current zero offset from RAM Send 1PP ZERO 0 lt lf gt Determine the current pressure reading Send 19 lf Make a note of this reading Subtract the current pressure reading from the true pressure vacuum reading The difference is the new zero offset required Example For a 0 15 psia unit with 300 millitorr vacuum applied using psi units 300 millitorr 0 0058 psia True Pressure Current Pressure reading from step 4 0 0011 psia True Pressure Current Pressure New Offset 0 0058 0 0011 0 0069 psi offset Enter the new offset into memory Send 1PP ZERO 0069 lt If gt The new offset of 0 0069 will now be added to all pressure readings for the subject DPT To check the
86. ten Bea ug 3 12 WINDOW PLC ee e Bla yt e gate TTD 3 13 ZERO 5 x bd eas Ade ies ees os hs ees Bs He Le we AUREUS 3 13 Common Mode Pressure iio por vo a ES WO SK a ee A Goes are e 7 5 Communications lt lt 2 gu qe d dun 2 20 9 e Ace 40 ceto ed da dk WP dc ae 1 2 1 4 Analog Voltage Output e e dasha A AA 1 3 Current Output enla aoe a aL 2 1e aA 2a4 as 2 wA AUR RU BA dod 1 3 Parallel Output 915 a Se SAR ae so tered ea ce qo EIS Me aR o Wales aA 1 4 January 2002 MENSOR CORP SERIES 4000 DPT INDEX SerialIn Out 2 6 4 X999 A A dox W A W n AS oe a 1 2 3 1 3 14 Configuration System a haya ee 2 1 Connectors Additional lt n ll le ee 8 1 Connections Electrical a dd Ay dl Wa A44 A2 A a dd A a a Ah 2 2 2 9 Barrier Strip TB Wiring l la ad ona Ll L S LL L LL L C L LAI a 2 3 Jl Wiring 33 a 1e osos eee nee re uq ee e Poe how der dir 1 5 1 6 2 2 4312 GO t la Set MM ads tos ess an 1 5 1 7 2 4 2 6 2 7 4 5 JO dae fa IN ats ied d ead LR UK A ea Cu a 1 5 2 8 2 9 Parallel Portu wA WEE h alay AT e AS he he a 2 8 RS 232 Cable le uns voi uer a a a lel cal w ga cu aide de sal es Us de 2 5 RS 485 Cable 4 4 co 9 a a eo AR ee o 2 6 RS 485 Serial Port arden 402524 sb 4 Ree i A HE de 2 le rir dede aee dera 2 6 Connectors See also Connections Electrical Binary Output o9 9 4 E ox x ox NE ve sy w Ee o
87. the return string will be identical MENSOR CORP January 2002 3 5 SERIAL COMMUNICATIONS SERIES 4000 DPT COMMANDS 3 6 The next several pages show commands common to all DPTs Explanations and examples of appropriate command strings are included using the RS 232 Start of Message character For models equipped for RS 485 operation simply substi tute the symbol in place of the symbol in the examples Additional commands unique to individual models are included in the text relating to those models Table 9 5 in the Appendix is an alphabetical Quick Reference list of all available DPT commands NOTE Each command that changes a parameter is volatile until the SAVE2MEMORY command is issued See SAVE2MEMORY below for details Query 1 lt lf gt This is a pressure reading query for address 1 It returns the pressure of the DPT at address 1 Returns 0 0039 lt cr gt lt lf gt 2 lt lf gt Pressure reading query for address 2 returns the pressure of the DPT at address 2 Returns 2 100 000 lt cr gt lt If gt ADDRESS This command is used to change a transducer address An error will be generated if the new address is not valid Use the SAVE2MEMORY command following an address change to make it permanent Examples FIADDRESS 5 lt lf gt Changes DPT at address 1 to address 5 Address f lt lf gt Changes a single DPT of any address to address F Do not use the global operator to change
88. tional to the upper positive pressure value and 32768 to 65535 counts proportional to the low end negative pressure up to zero reference pressure Straight Binary Output Model 4X11 Straight binary output uses O to 65535 counts 16 binary bits proportional to zero to full scale output pressure Binary Coded Decimal BCD Model 4X50 O to 100 000 counts 22 BCD bits proportional to zero to full scale pressure Output Loading 1000 ohms maximum load Factory calibration performed with 500 ohm load 7 8 January 2002 MENSOR CORP SERIES 4000 DPT OPTIONS AND ACCESSORIES OPTIONS AND ACCESSORIES ELECTRICAL CONNECTORS Additional mating connectors to match the DPT can be ordered separately The connectors and the Mensor part numbers are listed in the table shown below Table 8 1 Additional Mating Connectors Function Mensor Part Number Description Power Input 4050040002 4 pin female Serial Port 4050090015 9 pin female Parallel Option 4050360001 36 pin male Cover for 9 pin conn 3200500020 Shield 9 pin conn RELIEF VALVES There are several types of relief valves available One way differential Two way differential One way absolute One way absolute with vacuum gauge tube Relief valves are available for pressure ranges from 0 5 psi to 1020 psi Over time contaminants in the system may enter the valves and prevent proper operations Servicing the valves by the user
89. to barometric readings Engineering Units See Measurement Units Environmental Conditions Specified external conditions shock vibration temperature etc to which an instrument may be exposed during shipping storage handling and operation 10 2 January 2002 MENSOR CORP SERIES 4000 DPT GLOSSARY Error The algebraic difference between the indicated value and the true value of the pressure usually expressed in percent of full scale FS See Full Scale Full Scale The upper limit of the device range frequently noted as FS See also Range and Span Gauge Pressure The difference between atmospheric pressure and a variable pressure See also Pressure Relationships Gravity Correction The correction factor applied to measurement processes involving mass to account for the gravity constant exerted at the site of the measurement Hysteresis The maximum difference in output at any pressure value within the specified range when the value is approached first with increasing and then decreasing pressure Line Pressure The highest pressure within a system which can be present at the pressure sensor See also Reference Pressure Linearity The closeness of a calibration curve to a specified straight line expressed as a percentage of full scale deviation Measurement Units The units of measure used to define the pressure value Also referred to as Engineering Units or Pressure Units Operating Conditions See Envi
90. uou ad ng Mas ate Ste SO ahs ds 7 1 Pressure Connections See also Connections and Connectors 2 2 Medic ror o cd Water A A arduus S6 maru M as cA Oy fe 7 5 Ranges ero cele Row vog how vow e di BO ee uus 7 1 Relationships la 2i1 02 ou ed Aa LEUR amp Wu 2 1 44d S RR de a 10 4 Units See Units Pressure Common Mode i Voas a Xp uem awe Mol ew a ow ay 7 5 Printed Circuit Boards a Shar aes E n yay p a Wisar 8 lt 2 a 1 4 1 7 Program Sample BASIC Language KEKE KE KEKE KK KEK KK KK KK KK KK 9 7 Query String c lt v bue biy akar hws ole sh ae dad Bole sewl tel 3 5 Query Correction Value w lt a o vow V uer vog Y s 6 4 Quick Reference List of Commands 2 2 2 2 2 2 2 4 2 9 6 R RANGENEGY 5 62 5 a xr de Etude tete Nos a ete apte So aget le CN eu bu he is 3 11 RANGEPBOS ug 2 ago uas Ro b da 4 228 AM Ra ae dU d Ue Al ARMS UN BL A 3 11 Ranges Pressure 4 4 A a ark A RUSO We OY We ow de d v d d al na 7 1 Reading NOise a gel Soe a de oe os Nel eb e aeos dede fata Pase e 7 6 Reference Internal Volume 2 2 2 2 2 2 22 2425252 25252 252 2 252 7 6 Reference Port ari aee de tad Be ke A n r Rh rd de ke ede ddr dd 1 3 2 2 7 3 Relief Valves au ud exem Bo de an crar ugs Ae See ada Ae th ws Rk d ke 7 4 8 1 Remote Responses ue oo Ro a es 3 3 R sol tion Sut e era TU quan We Ava du cer AR
91. vae kn p RS P lat ha NP A TO 3 6 3 13 Differences between RS 232 and RS 485 ee 3 14 DPT Addtfess 2 5 m 4L ea Zh ab A A URL ded bee wd QA d A A 3 2 Generalna ana 5359 DDKO 3 1 Global Address Operator 3 2 Remote RESPONSES p s 2 i484 4 a aoi kaoa di d aa 3 3 Return String Format 3 5 RS 485 Serial Communication 0 2 0 eee ee 3 1 Serial Port Configuration lt s s sos sora eee 3 1 Serial In Out i A dok de OE BAe ede ede GA Rh e AA A RR Me ur Wir de RARA RA 1 2 SerialPort i odds Be ae da an doge Te lg ii he hq haa dees 2 4 2 5 3 1 3 2 ASOT CUO A A AAA A 2 4 Shock VibEation s ais sare o Sea QE an deran a al Sub es EMG JEN an ee a ee Ses ra 7 5 Signal NOISE 3 irae euet al der ec Gee gis ous ip al aap gee eE 4 2 SIZE 2 Zip a diri i ur em rd EE ACID ME rq ew dp o ed Hh eur ADU der Mop RE HY 7 2 Software License Agreement iv Span Adjustment Serial Port ls 6 7 SPAN Commande A ue duo xe we dO e dox kaya d UE S der d hakar ds 3 11 6 7 Specifications 2 22 Ie orca doo ddp Rog UR nad D 2q Re dep A aa Ay Ara 7 1 7 8 Stability Calibration n Sea wu 2 A N orn 7 1 Siandards ratas E beum de tb eae d el ed e dar usur eu x a a qr dak a Yer qe ale hue de dele Gide ef 6 2 7 1 T TARE Command rior EE e Ree Bes Ge Bee A Jan an era a es Texe jan a 3 12 Temperature Conversion Table lan e cl ar a yel ran nl r l cel n 9 3 Temperature Range C
92. y 1 5 2 8 2 9 4 5 Current Output 22 dee utate anle Be unos BB AUR Bee Te Efe ees qua Vr us 2 3 DC POWb a Eu demo ex Gaus am kal y Oey pes dete up kal BeOS pe dec ws af dr DR e CR Gee L de Ts one 7 4 P arallel POELt uw ta o We ae A NE EUN ONE SU que a ERE d E 1 5 2 8 Connections PESTE eck i Aza e owe um REIP 0 n Te AL RENDIR RUE NIME ALUE NDA E LE 2 2 Conventions Command 2 2 2 2 2 2 2 2 242 2 2252 2252 252 5 3 4 Conversion Factors psi csi aa d E 9 409 3 E Vd RUE x 9 2 Conversion Temperature 9 3 Correction Value Query rs 6 4 Current Alarms 4 5 4 s ai deo Me eta Bon poor ae ek e dal cal a wk diese cab Us 4 2 Current Output sa s ios edade a dy 1 3 1 7 2 3 4 2 6 8 6 9 Block Diagrams 4 4 4 xw daa Sos al Sa doy wow s AAA e od a 1 7 Calibrating fl sce usi ouo end At ada 6 8 Circuit Board 31 524 o UM Ree E ds v Edo a Card des 1 7 RS 232 Commands s y d uds gt de AA du auiA uw 4 2 Specifications Model 4080 KE KEK KEKE K KEKE KE KE K K KK KK KK KK KK KH 7 6 D DEFAULT Command sis a saro aad Ak wk 2 4 2 A 404 d GA RO RA 3 7 Density Gas and Liquid ajos 7 A A A Go ER A 9 4 Description General ios ose lo e od ae oes 1 1 Description Operational D ticos e ae ee a ors M a 1 2 Did you get Everything ee ee ss 1 1 Digital Output lt koc sce y9 9 a db 2 9 6 4 DIGITS Command 25 3 beg e ede i d ie ar eds t See e E rH itat 3 7 DIMENSIONS edem ure
93. zero correction Send 1 lIf The pressure reading returned should be 0058 psia if the pressure is still at 300 millitorr Save Send 1SAVE2MEMORY lt LF gt January 2002 MENSORO CORP SERIES 4000 DPT CALIBRATION Span Adjustment The span adjustment procedure is the same for gauge differential and absolute units Always make the zero corrections before changing the span scale factor The scale factor is a multiplier that is used to correct for span shifts The valid range of scale factors is from 0 9 to 1 1 1 Determine the current span scale factor and record the reading Send 1SPAN lt If gt This reading can be used at some later date to detect a span change between calibrations To clear the current scale factor Send 1PP SPAN 1 lt lf gt Substitute the Password Prequalifier for PP Apply a known true pressure equal to the span of the DPT To determine the DPT pressure reading Send 1 lt If gt Make a note of this reading Divide the known true pressure by the DPT pressure reading The result is the required new span scale factor Example For a 150 psi unit True Pressure 150 003 psi DPT Pressure reading from step 3 149 984 psi True Pressure DPT Pressure New Span Scale Factor 150 003 149 984 1 000127 To enter the new span scale factor Send 1PP SPAN 1 000127 lt lIf gt All pressure readings sent by this DPT will be multiplied by a scale factor of 1 000127 before they are t

Series 4000 - Mensor Corporation

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