Bulletin B-31 Series DHII Digihelic® II Differential Pressure
Contents
1. FLO Flow Range SUB MENU 99 99 x 1K flow range Hi 999 9 x 1K flow range Tables 3 6 show the flow ranges available and the maximum duct size that can be set for each input range Table 3 Table 4 FLU 10 Maximum Duct Size English FLU Maximum Duct Size English MAX DUCT SIZE SQ FT 01 99 99 x 1K 0 25 9x1K 4995 05 999 9 x4 ssi oooi oxi nur 999 9 x 1K Table 5 Table 6 FLU 10 Maximum Duct Size Metric FLG Maximum Duct Size Metric MAX DUCT DUCT RANGE SIZEM Range SIZE 99 99 x 1K 9999x1K 43 19 025 999 9 x 1 05 999 9 x1 99 99 x 1 999 9 x 1 999 9 x 1K Sx1K 610 KEAL SUB MENU BEAL Factor becomes accessible if the instrument is set for Velocity or Flow When the Digihelic Controller is used with a pitot tube the manufacturer may specific a K Factor The adjustment range is 0 01 to 2 00 The factory setting is 1 ACER 507 SUB MENUS These SUB MENUS become accessible if the instrument is set for flow When meas uring flow the area of the duct must be specified Tables 3 and 4 show the input range vs maximum flow and duct size For a rectangular duct the maximum size is specified in square feet or meters For a circular duct the maximum size is specified as the diameter X Y and circular dimensions are entered in feet with 0 01 foot2. LR Modbus Write Protect SUB MENU ci Disables write commands from Modbus Modbus can only read information from the instrument En Enable write commands from Modbus Modbus can read information from and write information to the instrument ZERO and SPAN Calibration of Zero and Span SUB MENUS The lower display reads HL in this mode ZERO Calibration NOTE For accurate calibration DO NOT apply any pressure when performing this function With the display reading ZEA press the ENTER key The upper display will blink Press ENTER again to complete the zeroing of the instrument or press the to cancel SPAN Calibration With the display set to SFA apply full scale pressure to the unit Press the ENTER key The upper display will blink Press ENTER again to complete the calibration or press the 7 key to cancel Copyright 2007 Dwyer Instruments Inc Printed in U S A 11 07 FR 19 443434 00 Rev 2 DWYER INSTRUMENTS INC Phone 219 879 8000 www dwyer inst com BOX 373 MICHIGAN CITY 46361 U S A Fax 219 872 9057 e mail info dwyer inst com
3. 678 12345678 SHIELD 120 OHM RESISTOR THE 120 OHM RESISTOR IS USUALLY ONLY NECESSARY FOR LONG WIRE RUNS N TIE SHIELD TO EARTH GROUND TO RS232 TO RS485 CONVERTER INSTALLATION Mount the instrument in a location that will not be subject to excessive tempera ture shock or vibration Pressure Connections Use 1 8 male NPT fittings When tightening fittings grasp the brass fitting on the Digihelic 1 Controller with a 1 2 wrench to prevent the fitting on the Digihelic Controller from turning MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND FLOW RANGES FRONT PANEL SP1 DESCRIPTOR SP2 DESCRIPTOR SP AL MENU KEY FUNCTIONS UNITS PROCESS VALUE HIGH ALARM DESCRIPTOR LOW ALARM DESCRIPTOR HOME POSITION FUNCTION MAIN MENU FUNCTION SUB MENU FUNCTION Sequences the display through SET POINT and ALARM settings Return to home position Return to home position Allows access to the Return to home Return to previous menu MENU menus position Sequences through Increments a value n menus Sequences through menus a ARROW RST RESET Displays full scale Enter into SUB MENU range of unit Clears or resets an Alarm alarm set for manual reset Decrements a value Changes a value or Setting Press ENTER and display will blink Adjust
4. dry contact switch 6 Shielded cable is required for RS485 wiring WIRING When wiring the instrument you must follow industry standard prac tice for control and protection against Electro Static Discharge ESD Failure to exercise good ESD practices may cause damage to the control 1 Remove cover 2 To gain access to the wiring terminal blocks remove the upper and lower screws toward the center of the display board and then flip the display board up at a 90 angle 3 Wire to the two terminals blocks as shown in the wiring diagram NOTE Depending on the application it may be only necessary to wire to the small er terminal block on the upper board In that case one of the liquid tight fittings may be removed and replaced with the provided rubber plug 4 For liquid tight applications use only 1 2 liquid tight conduit 5 When wiring is complete reverse steps 2 and 1 Make sure the cover is properly tightened to the housing DIGIHELIC CONTROLLER RS485 WIRING DIGIHELIC RS485 WIRING TO DAISY CHAIN INSTRUMENTS THE RS485 BUSS UP TO 128 UNITS MAY BE DAISY CHAINED LAST UNIT ON RS485 BUSS CONNECTOR ON CONNECTOR ON LOWER BOARD UPPER BOARD CONNECTOR CONNECTOR LOWER BOARD UPPER BOARD CONNECTOR UPPER BOARD 12345678 eooceooS CONNECTOR LOWER BOARD 12345678 12345678 000 006 12345678 12345
5. hysteresis and repeatability after 1 hour warm up Stability lt 1 per year Pressure Limits Ranges x 2 5 in w c 2 psi 55 5 psi 10 5 psi 25 5 psi 50 5 psi 100 9 psi Temperature Limits 32 to 140 F to 60 Compensated Temperature Limits 32 to 140 F 0 to 60 Thermal Effects 0 020 F 0 036 C from 77 F 25 Power Requirements High Voltage Power 100 to 240 VAC 50 to 400 Hz or 132 to 240 VDC Low Voltage Power 24 VDC 20 Power Consumption Low Voltage Power 24 VDC 130 mA max High Voltage Power 100 to 240 VAC 132 to 240 VDC 7VA max Output Signal 4 20 mA DC into 900 ohms max Zero amp Span Adjustments Accessible via menus Response Time 250 ms dampening set to 1 Display 4 digit backlit LCD 0 6 height LED indicators for set point and alarm sta tus Electrical Connections Euro type removeable terminal blocks with watertight conduit fittings for 1 2 watertight conduit Process Connections 1 8 female NPT Enclosure Rating Designed to meet NEMA 4 IP66 Mounting Orientation Mount unit in horizontal plane Size 4 73 x 4 7 3 x 3 43 120 mm x 120 mm x 87 1 mm Weight 2 b 10 oz 1 19 kg Serial Communications Modbus RTU RS485 9600 Baud Agency Approvals UL amp CE SWITCH SPECIFICATIONS Switch Type 2 SPDT relays Electrical Rating 8 Amps at 240 VAC resistive Set Point Adjustment Adjustable via keypad on face Modbus is a regi
6. with UP or DOWN arrows Press ENTER to store Display will stop blinking Peak Valley SUB MENU resets display to present value SETTING SET POINTS AND ALARMS The hot key provides direct access to the Set Point and Alarm MENU The Set Point and Alarm MENUS that are displayed are based upon the Control Ctrl SUB MENU CONTROLMODE CONTROL MODE CONTROL MODE 15 SPRL Visible when AL mode 17 Visible when AL mode lt Visible when fL mode SP2H SET POINT ADJUSTMENT Adjusting the Digihelic II Controller Set Points is quick and simple Instead of set ting a set point and deadband simply adjust 5 77 or SHAH for the desired relay turn on point and then adjust 5 77 or SFL for the desired relay turn off point 1 0 0 8 0 6 PRESSURE in w c 0 4 0 In the above graph an instrument with a 1 0 range would have the SP1 relay turn on at 0 8 and off at 0 4 5 71 sets the relay turn on point and SFL sets the relay turn off point The relays outputs normally function in the direct acting mode which means the relays turn on with an increase in pressure SP1 may be configured to act as a reverse acting relay refer to the 15 SUB MENU setting page 15 When set for reverse acting 5 7 sets the relay turn OFF point and 5 77 sets the relay turn ON point SP2 is always direct acting MAIN MENUS SUB MENUS SETTINGS MENUS UNA
7. Bulletin B 31 2 Series DHII Digihelic Differential Pressure Controller WYE Specifications Installation and Operating Instructions DWYER INSTRUM ENTS INC Phone 219 879 8000 www dwyer inst com P O BOX 373 MICHIGAN CITY 46361 U S A Fax 219 872 9057 e mail info dwyer inst com DIMENSIONS 1 1 2 1 31 64 4 23 32 3 7 16 38 35 37 62 7 718712 7 1 45 64 43 18 H 2 23 64 ii ree 45 64 1 145 64 33 3861 n 78 43 18 4X 03 16 4 76 CLEARANCE HOLES FOR Es MOUNTING 14 6 26 97 MOUNTING HOLE 7 PATTERN im 3 I A e e 47 5 4 1 8 i 105 OPTIONAL A 438 BRACKET WIRING TERMINAL ACCESS MOUNTING DIAGRAM 0 4954 ___ 105 17 o lt TARE j 8 4 00 THESE SCREWS SP2 2 TO GAIN ACCESS TO WIRING TERMINALS REMOVE THESE TWO SCREWS AND FLIP DISPLAY 90 DO NOT REMOVE THE SCREWS WITH POWER APPLIED TO INSTRUMENT WIRING TERMINALS HINGED STANDOFF 4 SPECIFICATIONS Service Air and non combustible compatible gases Wetted Materials Consult factory Housing Material Aluminum glass Accuracy 0 596 at 77 F 25 C including
8. The dampening setting adjusts the amount of readings that are averaged for each display update Adjust the dampening value until the display reads a stable value for the application Hat Advanced MAIN MENU PLIL Process output low Modbus address Process output high LIR Modbus write enable disable Maintenance set point 1 ZEK Zero calibration Maintenance set point 2 S5FPFAN Span calibration POL and Process Output Low and High SUB MENUS This feature is used in pressure operation only Process output low and high are used to scale the 4 20 mA output Set PLIL to the desired display reading for 4mA output and set PH to the desired display reading for 20 mA output FLIH must be higher than LL PLIL may be adjusted 2 BELOW minimum scale up to HGH PLH be adjusted from FUL to 2 ABOVE maximum scale 18 l I5P1 and 75 7 Maintenance Set Point 1 amp 2 SUB MENUS Adjust for the desired maintenance set points when the unit is placed in the maintenance mode The deadband is fixed at 296 of full scale To enter or leave the maintenance mode press and hold the for 8 seconds Modbus Address SUB MENU Modbus communication instrument address Set from 1 to 247 This num ber must match the address number used by the host computer To obtain the Digihelic II Controller Modbus register list please visit www dwyer inst com See page 4 for wiring diagram
9. VAILABLE E ub BI DIRECTIONAL RANGES AND zm a RANGES ABOVE CONTINUED lt MENU MAIN MENUS SUB MENUS SETTINGS gue gue HOLY 0 EH 511 CONTINUED 5 6 MAIN MENUS MENU SUB MENUS SETTINGS Menus present only in pressure operation Main Menu Selections Upper Right Display Reads 7E Y SELr Security Lock out access to Set Point and Alarm settings or lock out access to all settings Li Er Operation Selection of Pressure Velocity or Flow and corresponding engineering units Output Select a Single Set Point 2 Set Points or a Set Point and an Alarm mode of operation ci Display Monitor and adjust display related settings Peak Valley display resolution 96 output and dampening Advanced functions Modify advanced function parameters transmitter output scaling Modbus communication settings Maintenance Set Point settings and calibration MAIN MENUS and SUB MENUS SEC Security MAIN MENU 5ELr is the only SUB MENU in the security MENU When the security SUB MENU is selected the present security level is displayed in th
10. e upper right hand display To change the security level adjust the number displayed to the number shown in the following table for the desired security level Security Level Password Displayed Value to Enter 2 Menu Access 70 SP AL Locked 3 SP AL Access Menus Locked 4 All settings locked The password values shown in the table cannot be altered so retain a copy of these pages for future reference OPE Operation MAIN MENU The GFE MENU selects the measurement type of the instrument The SUB MENUS are Pressure KEFAL Factor XENI X Dimension LIEL Velocity Hr EH Area Y Dimension FLL Flow LIH Diameter If the instrument is set for Velocity the GFER MENU will have an additional KEAL SUB MENU If the instrument is set for Flow the LIFE MENU will have additional and Ai EA SUB MENUS These will be discussed under Velocity and Flow When scrolling through the LIFE SUB MENUS the measurement type the unit is currently set for will show the units in the upper right display The other measure ment types will have a blank upper right display PcES UEL Units not visible Units not visible Units visible so unit is presently set to measure pressure F ES Pressure SUB MENU For pressure measurement the following units are available INLIL Inches of water column Feet of water column Milimeters of water column LLL Centime
11. essure reading the instrument has measured since the last reset or power up At power up FEHMA is reset to the present pressure reading To manually reset the FEAA value press the RESET key while in the FEH SUB MENU LAL Valley SUB MENU The valley feature stores the lowest pressure reading the instrument has measured since the last reset or power up At power up HAL cy is reset to the present pressure reading To manually reset the LAL yy value press the RESET key while in the SUB MENU ESO Resolution SUB MENU The Digihelic Il Controller is capable of displaying four digits of resolution However at very low pressures the instability of the pressure may cause fluctuations in the least significant digit causing the least significant digit to be of little value Three digit resolution 2 447 can only be active when there is at least one digit to the right of a decimal EMS Set display for digit resolution Set display for 4 digit resolution 5 Process Display SUB MENU 570 Display reads pressure velocity or flow values PET Display reads 96 of full scale value When the display is reading percent FE 7 is displayed in the upper right of the display The percent display is only available in pressure operation Dampening SUB MENU Adjust from 1 16 Dampening stabilizes the display from instabilities due to things such as vibration and excessive pressure fluctuations
12. m ALARM ADJUSTMENT Alarm settings are dependent upon the selected alarm mode The Digihelic Controller alarm may be configured as a High Alarm Low Alarm or High Low Alarm Alarm settings are all absolute and may be set to anywhere within the range of the instrument The dead bands of the alarms are fixed at 196 of full scale HIGH ALARM FUNCTION MIN PRESSURE MAX PRESSURE gt Relay ON LOW ALARM FUNCTION MIN PRESSURE MAX PRESSURE Relay ON lt gt Relay OFF HIGH LOW ALARM FUNCTION MIN PRESSURE MAX PRESSURE Relay ON lt gt Relay OFF lt gt Relay Alarm Reset SUB MENU LINGE Automatic reset HOLL Manual reset An alarm is reset by the RESET key on the front panel or an external reset switch AL H Low Alarm Inhibit SUB MENU GN Alarm inhibit is on GFF Alarm inhibit is off If HL His selected ON a low alarm condition is suspended upon power up until the process value passes through the alarm set point once ALLL Alarm Delay SUB MENU Sets the amount of time an alarm condition must be continuously met before the alarm condition is recognized The alarm delay is adjustable from 0 3600 Seconds Display MAIN MENU Peak value ESLI Resolution LAL Valley value c5 Process display Zero Dampening level Peak SUB MENU The Peak feature stores the highest pr
13. res olution for FLG LU and 0 1 foot resolution for FLG H or entered in millimeters with 1 millimeter resolution Area select L R for a circular duct or KEL 7 for a rectangular duct If a circular duct is selected the LMA SUB MENU will be activated If a rectangular duct is selected the X47 and SUB MENUS will be acti vated Diameter enter the diameter of a duct Enter the X dimension of a duct Y SEM Enter the Y dimension of a duct Y OLI Output MAIN MENU The MENU selects the output type of the instrument The SUB MENUS are L L Control type ALE Alarm reset manual or auto SP1 reverse or direct acting Alarm inhibit AL Alarm type ALLL Alarm delay E Control SUB MENU ISP Single set point SF Two fully independent set points SFAL Single set point and alarm SP1 Reverse or Direct Acting SUB MENU LII Direct Relay turns on with increasing pressure KEL Reverse Relay turns with decreasing pressure Direct Acting 100 o 0 Relay Inactive Relay Active Reverse Acting 100 Relay Inactive Relay Active The following alarm function SUB MENUS are activated when 7 4 is set to SPAL AL Alarm Type SUB MENU High alarm 7 Low alarm HILLI For a high low guardband type alar
14. stered trademark of Schnieder Automation WIRING CONNECTOR LOWER BOARD 1234 56 7 8 CONNECTOR UPPER BOARD 12345678 eonocooo0S 3 8 A 250vac e LAG 100 240 VAC or 132 240 VDC POWER 9 D e RELAY ALARM WARNING A RS485 SERIAL B COMMUNICATION 24 VDC POWER NOTE 1 REMOTE RESET SWITCH Device receiving 4 20mA signal Check specifications of this device for input load resistance Typical 250 to 600 OHMS 900 OHMS maximum If Digihelic 1 Controller is powered by 24 VDC the device receiving the 4 20 mA transmitter output MUST NOT share a common ground with the 24 VDC supply or damage to the Digihelic II Controller will result NOTES 1 The instrument may be powered from the AC line or 24 VDC Do not wire AC line terminals 1 2 on the lower board and 24 VDC terminals 4 5 on the upper board at the same time or damage to the unit will result 2 For supply connections wire in accordance with an equivalent national standard or code Use copper conductors only rated for at least 75 C 3 Terminals on upper board are rated CLASS 2 4 ISOLATION Relays 1500 VAC to all other inputs and outputs AC Line Power terminals 4 5 1500 VAC to all other inputs and outputs 5485 output 500 to all other CLASS 2 wiring The 24 VDC Power 4 20 mA transmitter and Remote Reset Switch share common ground 5 The Remote Reset Switch must be a
15. ters of water column PSI Pounds per square inch Milimeters of mercury TIBAR Millibar Pascal Kilopascals Hectopascals INHG Inches of mercury OZIN Ounce inches Table 1 Pressure Range vs Available Units INWC FTWC MMWC CMWC PST INHG MMHG MBAR KPA APA JOZIN 1000 1250 2540 1868 2491 2491 24041 250 639 exo 146711627 6227 eee 1405 Fspo 1270 1 270 999 1245 1245 1245 1 245 2600 ioo 2540 2540 869 2491 249 1 2491 2481 5780 2500 2083 6350 6350 1839 4671 6227 8227 6227 6227 1445 504021671 1270 1272 1406 367819842 1245 1245 1245 28 0 zs es nei nis neri NOTE over flow under flow will appear when the ranges have been exceeded above or below full scale by 296 LEL Velocity SUB MENU For velocity measurement the following units are available Standard feet per minute 1 5 Meters per second Table 2 Available Velocity Ranges 0 1 0 25 0 10 0 25 NOTE Air velocity and flow readings are based upon standard dry air conditions with an ambient temperature of 70 F and a barometric pressure of 29 92 INHG 12 FLO Flow SUB MENU For flow measurements the following units are available Standard cubic feet per minute 3H Cubic meters per hour
Download Pdf Manuals
Related Search