1521 Users Guide571203.vp
Contents
1. Analog to Digital Converter and Measurement Circuit The ADC takes an analog signal produced by the probe and converts it to a digital value that can be read by the micro controller The ADC used in the 1521 was selected for its excellent resolution linearity and stability The measurement circuit built around the ADC was carefully designed for accuracy and stability to match the ADC The measurement circuit allows complete rejection of probe wire resis tance effects that would otherwise seriously limit accuracy Offsets from sources such as thermoelectric EMF are also completely rejected This is done using a current reversal technique with the probe current alternating at a rate of one cycle per second Self heating is minimized by using low sensing currents For PRTs the current is only 0 5 mA For thermistors the current is only 0 005 mA 5 Parts and Controls Accessories 5 5 Accessories The 1521 s accessories and their features are described here AC Adapter The AC adapter recharges the internal battery pack and can also be used to supply power to operate the 1521 while the battery is being charged see Section 6 2 Serial Cable The serial cable can be used to connect a computer or a printer to the 1521 through its serial port see Section 8 INFO CON Connector Hart s unique INFO CON connector allows the probe to be easily attached and detached from the 1521 It also contains a memory de vice that stores information about2. Hart Scientific 9 1521 Handheld Thermometer Readout User s Guide Rev 571203 ENG Rev 571203 Limited Warranty amp Limitation of Liability Each product from Fluke s Hart Scientific Division Hart is warranted to be free from defects in mate rial and workmanship under normal use and service The warranty period is one year for the Handheld Thermometer Readout The warranty period begins on the date of the shipment Parts product repairs and services are warranted for 90 days The warranty extends only to the original buyer or end user cus tomer of a Hart authorized reseller and does not apply to fuses disposable batteries or to any other prod uct which in Hart s opinion has been misused altered neglected or damaged by accident or abnormal conditions of operation or handling Hart warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non defective me dia Hart does not warrant that software will be error free or operate without interruption Hart does not warrant calibrations on Handheld Thermometer Readouts Hart authorized resellers shall extend this warranty on new and unused products to end user customers only but have no authority to extend a greater or different warranty on behalf of Hart Warranty support is available if product is purchased through a Hart authorized sales outlet or Buyer has paid the applicable inter
3. e Before initial use or after transport or after storage in humid or semi hu mid environments or anytime the instrument has not been energized for more than 10 days the instrument needs to be energized for a dry out period of 2 hours before it can be assumed to meet all of the safety re quirements of the IEC 1010 1 If the product is wet or has been in a wet environment take necessary measures to remove moisture prior to apply ing power such as storage in a low humidity temperature chamber operating at 50 C for 4 hours or more e This instrument can measure extreme temperatures Precautions must be taken to prevent personal injury or damage to objects Probes may be ex tremely hot or cold Cautiously handle probes to prevent personal injury 1 Before You Start Safety Information Carefully place probes on a heat cold resistant surface or rack until they reach room temperature e The AC adapter can present safety concerns if misused or damaged To avoid the risk of electric shock or fire do not use the AC adapter outdoors or in a dusty dirty or wet environment If the cord case or plug of the adapter is damaged in any way discontinue its use immediately and have it replaced Never disassemble the AC adapter Use only the AC adapter provided with the instrument or equivalent adapter recommended by the manufacturer of this instrument e The AC adapter has circuits with high voltage inside that could present danger of electr
4. 7 8 CAL MODE The calibration menu contains functions for setting probe and instrument cali bration parameters If a probe parameter is changed the probe parameter is up loaded into the INFO CON probe connector when the CAL MODE is exited or after scrolling through the entire menu Always check to insure that the param eters have been written to the INFO CON connector by disconnecting the probe or by turning the 1521 off and on The calibration menu is entered by pressing and holding the MODE button for three seconds CAL MODE appears on the display Press the ENT button to advance Press the MODE button while in the calibration menu to exit and to advance to the display mode that follows the display mode that was active be fore the CAL Mode was entered The functions contained in the CAL Mode are listed below in the order they ap pear In any of the functions the ENT button stores the displayed value or se lection and advances to the next function The CLR button can be used to cancel changes to a value or selection and skip to the next function Use the ENT button to move from Mtr Due to Prb Due and then to Time Use the CLR button to quickly advance through the remaining functions Many of the func tions are in the passcode protected part of the CAL Mode You must enter the correct passcode to reach them Mtr Due View the date the instrument is due for calibration Prb Due View the date the probe is due for calibration T
5. or CVD RO r 0 n r0 100 106 1 to 900 Read ITS 90 coefficient alb c d a4 b4 a a b c d a4 b4 a 2 8644101E 5 9 999999E 99 Set ITS 90 coefficient a b c d a4 b4 n a 2 8644E 5 1 0 to 9 9e 18 Read CVD coefficient al phayde ltabe ta al al de be 9 99999999 al 0 0038123 Set CVD coefficient al phajde ltabe ta n al 0 0038512 E 18 Read THERM thermistor b0 b1 b2 b3 b3 b0 b1 b2 b3 b3 9 944070e 12 coefficient 9 999999e 99 Set THERM thermistor b0 b1 b2 b3 n b3 9 944E 12 E 18 coefficient Read probe wires wi res wi wi 9 wi 4 Set probe wires wi res 2 3 4 wi 4 2 3 4 Read probe calibration date pc al pcal pc yyyy mm dd pc 1999 03 28 Set probe calibration date pc al yyyy mm dd pc 1999 03 28 1999 01 01 to 2100 12 31 Read probe due date pd ue pdue pd yyyy mm dd pd 1999 03 28 Set probe due date pd ue yyyy mm dd pd 1999 03 28 1999 01 01 to 2100 12 31 Read filter fi Iter fi fi 99 99999 fi 0 5 Set filter fi terjzn fi 0 0 0 to 60 0 Read low range calibration tol c1 c1 99 999 c1 0 0121 Set low range calibration ci n c1 0 012 1 999 to 1 999 Read high range calibration c2 c2 c2 9999 9 c2 0 9 Set high range calibration c2 n c2 0 9 1980 0 to 1980 0 Read meter calibration date mc al mcal mc yyyy mm dd mc 1999 03 28 Set meter calibration date mc al yyyy mm dd mc 1999 03 28 1999 01 01 to 2100 12 31 Read meter due date md ue mdue md yyy
6. 1521 see Figure 2 To use the battery pack 1t must first be fully charged using the AC adapter see Section 6 1 Switch the Power On Power is switched on and off with the power button located below and to the left of the display To switch the power on hold the power button down for at least two seconds To switch power off momentarily press the power button again The instrument takes a few seconds to power up initialize itself and be gin normal operation During initialization the lower line of the display shows the manufacturer model number firmware version and the state of battery charge or the message External power if the AC adapter is attached The 1521 reads important information about the attached probe from the INFO CON connector that it subsequently uses to calculate temperature The 1521 then performs a memory check of critical parameters such as the cal ibration parameters CAL1 and CAL2 During this check the lower line of the display reads Checking Memory If a Memory Error or Memory Recover message is displayed see Section 12 1 Troubleshooting for additional infor mation and instructions Measure Temperature After initialization the upper line of the display will begin to show temperature measurements sensed at the tip of the probe Place the tip of the probe into the object that you want to measure the temperature DO NOT force the probe or otherwise allow it to be bent stressed or
7. 3 oa Ho Haan Shwe dh Hee Be ee a ee do E ee Sa ee 30 7 8 4 teo P M Sah parade ses sar an senso A 30 7 8 5 Dilo eur AR oe ee a oe ey 31 7 8 6 A es Be SR eee vs eater er ER 31 7 8 7 PrB45 ue ed hs ee eed Dea ed Meche cee whedbueda RS 31 7 8 8 Pib Type eit bo a ode Rees Ara a Bee ee Be Boe SG 31 7 8 9 MUS 290 8 1022 2 xor N ede on NOD a he ex Ee da 32 7 8 10 sebo e o erie HAW wack he AE es aa MB SMa Hike ROW eto BMG 33 7 8 11 CYVDs 2a bb te biwd weed Shee orar ened Shae hada 33 7 8 12 YSEA00 3 ta eae epee Boa ty Sieh BAe wine a A VE 34 7 8 13 THERM p uds he E a Bele cac dde Ree ee AE Be 34 7 8 14 Probe Wires oe 9 d esed ec ee eo R9 OR a mE da 35 7 8 15 Palos ias pas a ee nee gs hs ad Ves tes a de ones ae ee ES A 35 7 8 16 PD G Sass so ten ade Be eene ues duda ee ode Me WA ener wx iod ace el as 35 7 8 17 OT dado Zo ty eevee tape ah Tes eee tae cat se oe dd vL MU DE 36 7 8 18 MEA ceg aeaa maua as RS Be ALLY Day wR oos 36 7 8 19 MDUS bu a Bp WO da v dre WO A 36 7 8 20 CAT Ihand CALZ 3 5 utes b oder Sos ee ek Gali at odes 36 8 Communications Interface 237 8 1 RS 232 Connection 37 8 2 Communication Command List 38 8 2 1 Primary Commands s i ee hk a a OR ai 38 8 2 2 Calibration Commands 0 00 eee eee ee es 39 9 Calibration 4 24 29 o o o m eee ene ee ee es AB 9 1 Required Equipment s gt se sees comecar aneo neas 43 9 2 Calibration Procedure 2 2 oen 43 10 Maint
8. Burn Hazard Read the User s Manual Important Information Off On OPPOUPH 1521 Handheld Thermometer Readout User s Guide Symbol Description G Canadian Standards Association Us OVERVOLTAGE Installation CATEGORY II Pollution Degree 2 per IEC1010 1 re CATI fers to the level of Impulse Withstand Voltage protection provided Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from the fixed installation Examples include household office and laboratory appliances C TIC Australian EMC Mark Y The European Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC mark mum 1 2 Safety Information Use this instrument only as specified in this manual Otherwise the protection provided by the instrument may be impaired The following definitions apply to the terms Warning and Caution e Warning identifies conditions and actions that may pose hazards to the user e Caution identifies conditions and actions that may damage the instru ment being used 1 2 1 A Warnings To avoid personal injury follow these guidelines e DO NOT use this unit in environments other than those listed in the User s Guide e Follow all safety guidelines listed in the User s Guide e Calibration equipment should only be used by trained personnel e If this equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired
9. and continue PCal This function shows the date the probe was calibrated and allows it to be set The date is stored in the INFO CON connector and is used simply for refer ence Use the Up and Down buttons to set each date segment and the ENT but ton to move to the next date segment to the right Press ENT when the date is correctly entered Press CLR to move to the next function without changing the date PDue This function shows the date the probe is due for calibration and allows it to be set The date is stored in the INFO CON connector The probe due date is regu larly checked against the present date and if the calibration has expired the user is alerted with the message Prb cal expired This message only disappears when the probe is recalibrated and the probe calibration due date is set to a fu ture date To set the date use the Up and Down buttons to set each date seg ment and the ENT button to move to the next date segment to the right Press ENT when the date is correctly entered Press CLR to move to the next func tion without changing the date 35 1521 Handheld Thermometer Readout User s Guide 36 7 8 17 7 8 18 7 8 19 7 8 20 Note Probe parameters are uploaded to the INFO CON connector at this point Filter The digital filter helps to smooth variations in the measurements and improve resolution A negative effect of filtering is that it tends to slow the response to changes in temperature Y
10. measurements CLR to reset Hold Data stored in the hold registers Delta x Delta from reference measurement ENT to set reference Units C Q F K R Set the units of measurement Rate 00000 Set the period for serial transmission Resol XXX XXX Set the display resolution CAL MODE Set probe and instrument calibration parameters MODE button must be held for three seconds See Section 7 8 Note Units Rate and Resol are temporary modes The instrument will return to Delta x mode if left in one of these modes when the power is cycled 25 1521 Handheld Thermometer Readout User s Guide Each of these operating modes is described in the sections that follow Blank Mode any mode paro 3 seconds Cal Mode Figure 7 Operating Modes Flowchart 7 1 Blank Mode This mode is identified by Blank that temporarily appears on the display 26 7 Display Functions Min Max Mode 7 2 7 3 7 4 In this mode nothing appears on the alphanumeric portion of the display Use this mode if you are only interested in the latest measurements and want to sim plify the appearance of the display The message Prb cal expired Mtr cal expired Recharge Needed or Probe is locked may be displayed See Section 11 1 Min Max Mode This mode is identified by Min Max that temporarily appears on the display In this mode the maximum and minimum measurements taken since the last tim
11. of the 1521 include the following Measures with platinum resistance thermometers PRTs and thermistors Works with Hart s special INFO CON probe connector which is partially based on U S Patent 5 857 777 to automatically recognize the type of sensor and its characteristics Automatically alerts the operator when the probe calibration or meter cal ibration expires Measures with an accuracy of 0 025 C at 25 C with PRTs and 0 005 C at 25 C with thermistors Accepts three or four wire sensors to eliminate lead resistance errors Is immune to thermoelectric EMF Measures with a fast one second measurement cycle Displays maximum minimum and delta temperatures Stores up to six measurements in memory Uses a unique factory assigned pass code to protect programmed settings Displays measurements and settings on a high contrast LCD display Communicates with other equipment using an RS 232 serial interface Can be powered from its AC adapter or rechargeable battery 3 Specifications and Environmental Conditions Specifications Specifications and Environmental Conditions Specifications Resistance Range 0Q to 500 kQ Resistance Accuracy PRT one yeart 0Q to 250 0 0020 259 to 4002 0 008 80 ppm of reading Resistance Accuracy thermistor one yeart 0Qto 2 KO 0 40 2 kQ to 200 kQ 0 02 200 ppm of reading 200 KQ to 500 kQ 0 03 300 ppm of reading Temperature Range PRT 200 C to 962
12. or a5 b4 b4 or b5 Consider the following examples Example 1 7 Display Functions CAL MODE 7 8 10 7 8 11 A PRT was calibrated to ITS 90 and its calibration certificate states values for coefficients R 273 16K a4 b4 a8 and b8 Set the 1521 coefficients to the certificate values as follows 1521 Coefficients Certificate Value R 01 R 273 16K a a8 b b8 C 0 0 d 0 0 a4 a4 b4 b4 Example 2 A PRT was calibrated to ITS 90 and its calibration certificate states values for coefficients R 273 16K a5 and b5 Set the 1521 coefficients to the certificate values as follows 1521 Coefficients Certificate Value R 01 R 273 16K a a5 b b5 c 0 0 d 0 0 a4 a5 b4 b5 IEC751 The IEC 751 probe type is for standard PRTs RTDs conforming to the IEC 751 or DIN 43760 standards This type of probe is generally low cost and has a wide operating range 180 C to 420 C or higher but has limited accu racy 0 15 C to 4 C There are no user programmable coefficients associated with this probe type CVD The CVD Callendar Van Dusen type is used with PRTs that have unique cal ibration coefficients or do not match the IEC 751 specification This type of probe is generally low cost has a wide operating range 180 C to 420 C or 33 1521 Handheld Thermometer Readout User s Guide higher and has moderate accuracy 0 05 C to 1 C This type uses the Callendar Van Duse
13. the probe and automatically transfers this data to the 1521 when the probe is attached This ensures that the set tings used to measure and calculate temperature always match the probe being used see Section 6 6 Figure 3 INFO CON Connector Probe The probe acts as the temperature sensor Its resistance depends on its temperature The 1521 precisely measures the resistance of the probe and uses the coefficients stored in the INFO CON connector to calculate its temperature see Section 6 5 The following probe options are available 17 1521 Handheld Thermometer Readout User s Guide Ordering Information Cal Uncertainty and Typical Drift Model Type Range Size Repeatability 1 year 5626 Pt 100 Ohm 4 wire 200 to 660 C 1 4 x 12 or 15 0 015 C 0 03 C 6 35 x 305 or 381 mm 5628 Pt 25 Ohm 4 wire 200 to 660 C 1 4 x 12 or 15 0 015 C 0 03 C 6 35 x 305 or 381 mm 5614 Pt 100 Ohm 4 wire 200 to 450 C 1 4 x 12 6 35 x 305 mm 0 025 C 0 01 C 5613 Pt 100 Ohm 4 wire 200 to 300 C 3 16 x 6 4 76 x 152mm 0 025 C 0 01 C 5612 Pt 100 Ohm 4 wire 200 to 450 C 3 16 x 9 4 76 x 220 mm x0 025 C 0 01 C 5627 6 Pt 100 Ohm 4 wire 200 to 300 C 3 16 x 6 4 76 x 152mm 0 035 C 0 13 C 5627 9 Pt 100 Ohm 4 wire 200 to 450 C 3 16 x 9 4 76 x 220 mm x0 035 C 20 130 5627 12 Pt 100 Ohm 4 wire 200 to 450 C 1 4 x 12 6 3
14. with ade quate depth and fit into the medium to be measured CAUTION Probes are fragile devices that can be easily damaged by me chanical shock overheating and absorption of moisture or fluids in the wires or hub Damage may not be visibly apparent but nevertheless can cause drift instability and loss of accuracy Observe the following pre cautions Do not allow probes to be dropped struck bent or stressed Do not overheat probes beyond their recommended temperature range Do not allow any part of the probe other than the sheath to be immersed in fluid Do not allow the probe hub or wires to be exposed to excessive temperatures Keep the probe wires clean and away from fluids INFO CON Connector The probe connects to the top of the 1521 using a Hart INFO CON connector see Figure 3 on page 17 The probe connector will fit snugly and lock into place when it is fully inserted The connector includes a memory device that stores the unique characteristics of the probe allowing the instrument to mea sure temperature accurately Generally the probe will be purchased with the connector attached and programmed by the factory Connectors can be pur chased separately and installed onto probes by the user The INFO CON can be programmed directly from the 1521 by authorized personnel If it is necessary to install the INFO CON onto a probe in the field follow the diagram below for connecting the wires of the probe to the connector
15. 5 x 305 mm 0 035 C 20 130 5610 6 10K ohm Thermistor 0 to 110 C 1 8 x 6 3 2 x 152 mm 0 02 C 0 01 C 5610 9 10K ohm Thermistor 0 to 110 C 1 8 x 9 3 2 x 229 mm 0 02 C 0 01 C 5611 10K ohm Thermistor 0 to 110 C 0 07 x 0 55 1 8 x 14 mm 0 02 C 0 01 C 5611T 10K ohm Thermistor 0 to 110 C 0 11 x 1 1 2 8 x 28 mm 0 02 C 0 01 C 5640 4K ohm Thermistor 0 to 60 C 1 4 x 9 6 35 x 229 mm 0 0015 C 0 005 C LogWare Software The Model 9934 LogWare software is a one channel data acquisition software This software can be used with your 1521 thermometer to collect and graph data Carrying Cases There are two types of cases available for your 1521 ther mometer The Model 9318 case is a hard case for carrying the thermometer and a 12 probe The Model 9321 case is a soft case with a belt clip and a probe slot 18 6 General Operation Battery 6 General Operation This section explains the details of the operation of the 1521 with its compo nents and accessories 6 1 Battery The 1521 has a built in nickel metal hydride battery pack that can power the instrument for about 18 hours before needing to be recharged The battery will discharge much more quickly if the display backlight is used often The battery charge remaining or the message External Power is shown on the display when the instrument is switched on The battery percentages are approximate and should be used as general gui
16. 521 Handheld Thermometer Readout User s Guide 22 6 5 smaller type to the right of the measurement The possible units are degrees Celsius C resistance in ohms Q degrees Fahrenheit F Kelvin K and degrees Rankine R The units can be easily changed by placing the display in the units setting mode using the MODE button see Section 7 5 The lower part of the display has various functions depending on the selected mode It has smaller alphanumeric characters It can be used to display mini mum and maximum measurements delta x measurements or measurements stored in memory It is also used to view and set various operating parameters The mode is easily changed using the MODE button See details on the vari ous modes beginning with Section 7 The display has a backlight that can be switched on for better viewing in dim light The backlight is switched on and off by pressing and holding the power button for three seconds see Section 6 3 above Note The battery dis charges more quickly when the backlight is used Probe The probe is used to sense temperature The probe attaches to the 1521 using a Hart INFO CON probe connector that plugs into the top of the instrument The probe connector must be properly programmed with the correct charac teristics of the probe for measurements to be accurate see Section 6 6 The 1521 can be used with various types of PRT and thermistor probes e ITS 90 calibrated 25Q or 1000 PR
17. C 328 F to 1764 F Thermistor 50 C to 150 C 58 F to 302 F Temperature Accuracy PRTt 200 C to 100 C 0 025 C 0 045 F 100 C to 400 C 0 05 C 0 09 F 400 C to 800 C 0 1 C 0 18 F 800 C to 962 C 0 15 C 0 27 F Temperature Accuracy 50 to 25 C 0 005 C 0 009 F 2 25 kQ thermistort 25 C to 50 C 0 01 C 0 018 F 50 C to 75 C 0 03 C 0 054 F 75 C to 100 C 0 08 C 0 144 F Temperature Accuracy 0 to 50 C 0 005 C 0 009 F 10 kQ thermistort 50 C to 75 C 0 01 C 0 018 F 75 C to 100 C 0 02 C 0 036 F 100 C to 125 C 0 05 C 0 09 F 125 C to 150 C 0 1 C 0 18 F Temperature Accuracy 0 to 50 C 0 006 C 0 011 F 100 KQ thermistort 50 C to 150 C 0 009 C 0 016 F Resistance Resolution 0 0012 Temperature Resolution 0 001 C F K R Probe IEC 751 or DIN 43760 PRT Callendar Van Dusen calibrated PRT nominal 100Q ITS 90 calibrated 25Q or 1000 PRT YSI 400 series or equivalent 225202 thermistor Steinhart Hart thermistor polynomial nominal R 25 C 2kQ to 100kQ Probe Connector Hart Scientific INFO CON connector Maximum Acceptable Probe Lead 100 Resistance Probe Excitation Current PRT 0 5 mA Thermistor 5 yA Measurement Period 1 second 1521 Handheld Thermometer Readout User s Guide 10 3 2 Digital Filter Exponential with adjustable time constant 1 to 60 seconds Remot
18. SPECIAL INDIRECT INCIDENTAL OR CONSE QUENTIAL DAMAGES OR LOSSES INCLUDING LOSS OF DATA WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT TORT RELIANCE OR ANY OTHER THEORY Since some countries or states do not allow limitation of the term of an implied warranty or exclusion or limitation of incidental or consequential damages the limitations and exclusions of this warranty may not apply to every buyer If any provision of this Warranty is held invalid or unenforceable by a court of com petent jurisdiction such holding will not affect the validity or enforceability of any other provision Fluke Corporation Hart Scientific Division 799 E Utah Valley Drive American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com www hartscientific com Subject to change without notice Copyright 2005 Printed in USA Table of Contents 1 Before You Start 1 1 Symbols Used o cu ee o a o e e Rn 1 1 2 Safety Information so eR Ro RR RES 2 1 2 1 WETS ge ar ae RS gs Sat A O ea e 2 1 22 CAULONS dia sek da tada o deser CE dd Sie dis the ead en d 3 1 3 Authorized Service Centers 02 0000028 4 2 Introduction 7 3 Specifications and Environmental Conditions 9 3 1 SpecIfICatlOniS uc Ro ee RUE US Rd RI UR ee ee a eS 9 3 2 Environmental Conditions lcs 10 4 Quick Sb oaa wo Ec o
19. T e IEC 751 or DIN 43760 PRT RTD e Callendar Van Dusen calibrated 100Q PRT e YSI 400 series or equivalent 2252Q thermistor e Steinhart Hart thermistor polynomial nominal R 25 C 2kQ to 100kQ See Section 7 8 8 for details on the various probe types and their programming The 1521 cannot be used with thermocouples The 1521 can be used with probes having two three or four wires Three wires allow partial compensation for wire resistance The 1521 measures three wire probes using the following algorithm It measures the sensor resistance includ ing the lead resistance in C2 The 1521 then directly measures the resistance in the C1 lead of the sensor The 1521 then subtracts the measured C1 lead resis tance from the measured sensor resistance including the C2 lead resistance to obtain the sensor resistance used to calculate temperature Note This algorithm assumes that the lead resistance of C1 and C2 are equal If C1 and C2 have dif ferent resistance there will be an error in the calculated sensor resistance equal to this difference Four wires allow complete rejection of wire resistance and should be used when the best accuracy is desired The 1521 wire setting must be set to match the actual number of wires of the probe see Section 7 8 14 6 General Operation INFO CON Connector 6 6 Temperature is generally sensed at the tip of the probe To get an accurate tem perature measurement the probe sheath should be well immersed
20. a bits 1 stop bit and no parity Use no flow control The baud rate is fixed at 2400 the linefeed to Y GND GND Bu gt TXD TxD RxD Figure 8 RS 232 Wiring 37 1521 Handheld Thermometer Readout User s Guide 8 2 ON all carriage returns are followed by a linefeed ASCII decimal 10 and the duplex to HALF disabling echo The serial port can be used to transmit measurements to a computer or printer It can also be used to change settings of the 1521 from a computer or interface with software A full list of commands follows in Section 8 2 Commands sent to the 1521 must end with an EOS character which is a car riage return ASCII decimal 13 or linefeed character ASCII decimal 10 Commands can be sent with upper or lower case letters Data returned from the 1521 ends with a carriage return and a linefeed Communication Command List 8 2 1 Primary Commands The following group of commands read or set various functions Response Response Description Command Example Format Example Range Read measurement extended temperature t t 999 999 t 125 745 C format C O F R or Kj 03 01 1999 mm dd yyyy 15 49 15 hh mm ss Read measurement simple format fletch fetch t 999 999 t 25 587 C rea d read C O F R or K me asure meas Read minimum m inimum min min 999 999 min 14 653 C C O F R or Kj Read maxim
21. anges to a setting and in the MIN MAX mode resets the minimum and maximum to the last measurement Up and Down buttons These buttons are used to change values and settings MODE button This button advances through operating modes and program ming functions see Section 7 5 Parts and Controls Top and Side Features 5 2 Top and Side Features Top View Probe Connector Side View Serial Port Infrared Window not used DC Power Input Figure 2 Top and Side View The top and side of the 1521 feature the probe connector DC power input se rial port and infrared window Probe Connector At the top of the thermometer is the opening where the probe connector is inserted The probe must be connected using an INFO CON probe connector to measure temperature see Section 6 6 DC Power Input The AC adapter plugs into the DC power input to recharge the battery and to power the instrument while the battery is being charged see Section 6 2 Serial Port The RS 232 serial port provides a means of connecting the 1521 to a computer or a printer using the included serial cable see Section 8 The baud rate is fixed at 2400 baud the linefeed is fixed to ON all carriage returns are followed by a linefeed ASCII decimal 10 and the duplex is fixed to Half disabling the echo Infrared Window The infrared window has no functionality 15 1521 Handheld Thermometer Readout User s Guide 5 3 5 4 Back Features See F
22. ation is used without the b2 term For this case the b2 coefficient should be set to 0 Consider the following examples Example 1 A thermistor has coefficients for the equation In R as a function of T given as a b c and d Set the 1521 coefficients to the certificate values as follows 1521 Coefficients Certificate Value b0 a b1 b b2 c b3 d 7 Display Functions CAL MODE 7 8 14 7 8 15 7 8 16 Example 2 A thermistor has coefficients for the equation In R as a function of T given as a b and c Set the 1521 coefficients to the certificate values as follows 1521 Coefficients Certificate Value b0 a b1 b b2 0 0 b3 C Probe Wires This function sets the number of connecting wires in the probe The probe wires setting is stored in the INFO CON connector The 1521 can be used with probes that have two three or four wires Three wires connecting the probe sensor instead of two allows the 1521 to partially cancel measurement error due to the resistance of the wires With four wires the 1521 can completely cancel the error The internal measurement circuit is configured differently depending on the number of wires Important The 1521 will try to calculate a mea surement even if the wire settings are incorrect Therefore the Probe Wires setting must match the actual number of wires or loss of accuracy will result Use the Up and Down buttons to set the value and press the ENT button to store
23. delines when determining the length of charge remaining The battery is recharged in situ while in place using the AC adapter that s provided Plug the AC adapter into an AC socket of the appropriate voltage as noted on the AC adapter normally 115V optionally 230V Connect the DC plug of the adapter into the DC input of the 1521 located on the right side The battery will be charged as necessary whether or not the instrument is switched Stand in vertical position FLUKE CORPORATION HART SCIENTIFIC DIVISION FLUKE CORPORATION HART SCIENTIFIC DIVISION MADE IN USA MODEL 1521 SERIAL NO 941234 MODEL 1521 SERIAL NO 941234 O O Battery plug Battery connector Battery removed Battery installed and connected Figure 4 Battery Installation 19 1521 Handheld Thermometer Readout User s Guide 20 6 2 on The power control circuit inside the instrument manages battery charging and will stop charging the battery automatically when it s fully charged It nor mally takes about four hours to fully charge the battery The instrument can be operated while the battery is being charged CAUTION DO NOT leave the AC adapter plugged in for more than 24 consecutive hours or the battery life could be degraded The battery pack can be used for a minimum of 500 charge discharge cycles before needing to be replaced Replacement battery packs are available from the manufacturer The battery pack can be easil
24. e Communications RS 232 serial Display LCD 6 digit x 7 segment with 16 character alphanumeric Operating Temperature Range 0 to 40 C 32 to 104 F absolute 15 to 35 C 59 to 95 F full accuracy Power 12 VDC AC adapter included Rechargeable NiMH batteries included Safety OVERVOLTAGE Installation CATEGORY Il Pollution Degree 2 per IEC 1010 1 refers to the level of Impulse Withstand Voltage protec tion provided Equipment of OVERVOLTAGE CATEGORY ll is en ergy consuming equipment to be supplied from the fixed installation Examples include household office and laboratory appliances Size 7 75 H x4 2 Wx1 5 D 20 cm H x 11 cm W x 4 cm D Weight 0 4 kg 1 0 Ib Accuracy specifications apply from 15 to 35 C Accuracy specifications over the entire absolute operating range are 1 5 times the stated values Temperature accuracy does not include probe uncertainty or probe characterization errors The practical measurement range may be limited by the sensor Environmental Conditions Although the instrument has been designed for optimum durability and trou ble free operation it must be handled with care The instrument should not be operated in an excessively dusty dirty or wet environment Maintenance and cleaning recommendations can be found in the Maintenance section of this manual For full accuracy operate the instrument in ambient temperatures between 15 35 C 59 95 F Do not operate t
25. e disabled If probe lock is OFF the instrument can be used with any probe To lock the instrument with a new probe set probe lock OFF attach the new probe and then set probe lock ON again Probe lock ON also disables access to the probe parameters that follow in the menu The probe parameters beginning with the probe serial number will only appear in the menu if probe lock is OFF To set probe lock use the Up and Down buttons to select ON or OFF and press the ENT button to store and continue Prb This function displays the serial number of the probe and allows it to be set The probe serial number is stored in the INFO CON probe connector Use the Up and Down buttons to set each digit and the ENT button to move to the next digit on the right Press ENT when all digits are entered Prb Type This function specifies the type of probe and its characterization It allows the 1521 to use the appropriate algorithm to calculate temperature from the mea sured resistance of the probe The functions that follow the probe conversion function for setting probe characterization coefficients depend on the selected probe type The table below lists the probe types and the corresponding coefficients Probe Type Description Coefficients 31 1521 Handheld Thermometer Readout User s Guide ITS 90 PRTs calibrated to ITS 90 R 01 a b c d a4 and b4 IEC751 PRTs RTDs conforming to IEC 751 none CVD PRTs characterized by the Calle
26. e the function was cleared appears on the display The minimum appears on the left and the maximum appears on the right The resolution of the displayed values may be changed using the Resolution mode see Section 7 7 Pressing the CLR button at anytime while in this mode clears the minimum and maxi mum values setting them to the last measurement Both the minimum and max imum are reset to 0 C 32 F when the instrument is powered up The message Prb cal expired Mtr cal expired Recharge Needed or Probe is locked may be displayed See Section 11 1 Hold Mode This mode is identified by Hold that temporarily appears on the display In this mode the data stored in one of the hold registers appears on the display There are six hold registers The resolution of the Hold register values may be changed using the Resolution Mode see Section 7 7 The Up and Down but tons are used to select a desired hold register for viewing The ENT button is used to store a measurement in the next available register The message Prb cal expired Mtr cal expired Recharge Needed or Probe is locked may be displayed See Section 11 1 Delta x Mode This mode is identified by Delta x that temporarily appears on the display In this mode the delta between the measurement and a previously stored refer ence value appears on the right side of the display The reference value appears on the left The resolution of the refer
27. ection CAUTION The 1521 and any thermometer probes are sensitive instru ments that can be easily damaged Always handle these devices with care DO NOT allow them to be dropped struck stressed or overheated Learn About the Features and Components Familiarize yourself with the features and accessories of the 1521 by reading Section 5 Connect the Probe The PRT or thermistor probe connects to the top of the 1521 using Hart s unique INFO CON probe connector The probe connector is inserted into the 11 1521 Handheld Thermometer Readout User s Guide 4 5 4 6 4 7 top of the instrument with the ridged side down It will fit snugly and lock into place when it is fully inserted The INFO CON probe connector includes a memory device that stores the unique characteristics of the probe allowing the 1521 to measure tempera ture accurately If your probe was purchased from Hart for use with the 1521 it should already have the connector attached and properly programmed You can use your own probe with the 1521 but you must attach it with an INFO CON connector See Section 6 6 for more information on the INFO CON connector Connect the Power Source The 1521 draws power from either a DC power supply the included AC adapter connected to the DC input or the internal rechargeable battery pack To use the AC adapter plug it into a wall outlet of the appropriate voltage and in sert the DC plug into the DC power input of the
28. eeping the passcode number stored in a proper location and 7 Display Functions CAL MODE 7 8 5 7 8 6 7 8 7 7 8 8 ensuring that it is not lost or forgotten If necessary the passcode can be re stored by contacting the manufacturer To enter the passcode use the Up and Down buttons to set each digit of the passcode and the ENT button to move to the next digit on the right Press ENT twice when all digits are entered to move to the next function If the passcode is entered correctly the next function in the CAL Mode will appear Date This function displays the present date and allows it to be changed This func tion is placed in the passcode protected part of the CAL Mode since the calibra tion due warning messages depend on the present date as well as the stored due dates Use the Up and Down buttons to set each date segment and the ENT button to move between the date segments Press ENT when all digits are en tered to save the changed values The CLR button moves to the next function Probe Lock This function locks or unlocks operation of the unit with the presently con nected probe only If probe lock is set to ON the instrument can only be used to display temperature with the probe attached when probe lock was set ON If probe lock is ON and a different probe is attached the instrument will display the serial number of the connected probe PRT xxxxxxxxxx and then the message Probe is locked Measuring will b
29. enance 45 ii 11 Troubleshooting 47 11 1 An Error Message Is Displayed 47 11 2 CE Comments 22 56 RA SE eee we 48 11 2 1 EMC Directive ors ree aces dup hee ar WSR A RR Bite 48 1121 7 Immunity Testing ie ea ee eek Bae we wee ae rm RR EX Go are datas 49 T1212 Emission Testing 25 8 sog oe dices Hr di bebe aa sh cti 49 11 2 2 Low Voltage Directive Safety llle 49 lii Figures and Tables Table 1 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 International Electrical Symbols o 1 Front of the 1521 0 oe ae bk a dad 13 Top and Side View ca oo o9 RR Oe Heed exa 15 INFO CONConnector eee 17 Battery Installation re 4445428 ee Sale Se RSS 19 12V DC Power Source Polarity o 21 Probe Wiring Diagrams s ss ewe o e ee 24 Operating Modes Flowchart lt o leen 26 R5 232 WIDE ena a BE eS eek Sod eS 37 1 Before You Start Symbols Used 1 1 Before You Start Symbols Used Table 1 lists the International Electrical Symbols Some or all of these symbols may be used on the instrument or in this manual Table 1 International Electrical Symbols Symbol Description NU AC Alternating Current PS AC DC Battery CE Complies with European Union Directives Mm MA DC Double Insulated Electric Shock Fuse PE Ground Hot Surface
30. ence value may be changed using the Resolution mode see Section 7 7 if necessary The ENT button stores the present measurement as the reference value The message Prb cal expired Mtr cal expired Recharge Needed or Probe is locked may be displayed See Section 11 1 27 1521 Handheld Thermometer Readout User s Guide 28 7 5 7 6 7 7 Units This mode is identified by Units C Q F K R that appears on the display This mode allows you to select the unit of measurement C for degrees Celsius Q for resistance in ohms F for degrees Fahrenheit K for Kelvin and R for Rankine The Up and Down buttons are used to select one of the displayed units The underline cursor indicates which of the units is selected The ENT button stores the selection If the MODE button or CLR button is pressed with out pressing ENT the unit remains unchanged Once the unit is selected subse quent measurements appear in that unit The Min Max and Delta x values are automatically converted when changing to C K F or R units When measuring in units of ohms make sure that the appropriate probe type has been selected in the Cal Mode menu For example to measure a sensor be tween 0 and 400 ohms set the units to ohms and select the probe type CVD To measure a sensor between 400 and 500K ohms set the units to ohms and se lect the probe type THERM Rate This mode is identified by Rate 00000 that appears on the dis
31. everal situa tions that may arise followed by possible causes of the problem and suggested actions you might take An Error Message Is Displayed The following table lists possible error messages their causes and suggested actions Problem Solution Recharge Needed The battery is low and needs to be recharged When this message first appears the user has approximately 30 minutes of charge left If the battery is not recharged the 1521 continues to operate until the bat tery drops below 0 and then automatically shuts itself off after dis playing the error message No Probe The display shows The instrument is unable to detect that a probe is connected Check that a probe with a properly pro grammed INFO CON connector is attached Probe is locked The incorrect probe is attached The meter is set to accept only the probe with the given serial number Attach the correct probe or have the instrument properly programmed for the new probe Prb cal expired The probe calibration has expired Have the probe calibrated and the calibration due date reset Mtr cal expired The meter calibration has expired Have the instrument calibrated and the calibration due date reset Invalid Passcode The passcode entered was not correct Check the passcode on the Pass code Notice sent with the instrument The instrument display is blank Make sure the instrument has power either from the batter
32. follow these guidelines e Ifthe instrument is dropped struck or handled in a way that causes inter nal or external physical damage immediately unplug the AC adapter re move the batteries discontinue use and contact the factory for repair Do not attempt to disassemble or repair the instrument batteries or AC adapter Refer repairs or replacement components to the manufacturer e The instrument and thermometer probes are sensitive and can be easily damaged Always handle these devices with care DO NOT allow them to be dropped struck stressed or overheated e DO NOT leave the AC adapter plugged in for more than 24 consecutive hours or the battery life could be degraded 1521 Handheld Thermometer Readout User s Guide 1 3 e Probes are fragile devices which can be damaged by mechanical shock overheating and absorption of moisture or fluids in the wires or hub Damage may not be visibly apparent but nevertheless can cause drift in stability and loss of accuracy Observe the following precautions e DO NOT allow probes to be dropped struck bent or stressed e DO NOT overheat probes beyond their recommended temperature range e DO NOT allow any part of the probe other than the sheath to be im mersed in fluid e DO NOT allow the probe hub or wires to be exposed to excessive temper atures e Keep the probe wires clean and away from fluids Authorized Service Centers Please contact one of the following autho
33. he instrument in an environment colder than 5 C 41 F or warmer than 50 C 122 F The instrument operates safely under the following conditions e Operating temperature range absolute 5 50 C 41 122 F full accuracy15 35 C 59 95 F e ambient relative humidity maximum 80 for temperature lt 31 C de creasing linearly to 50 at 40 C e Pressure 75kPa 106kPa e Vibration should be minimized e Altitude less than 2 000 meters e Indoor use only 4 Quick Start Unpacking 4 1 4 2 4 3 4 4 Quick Start This section briefly explains the basics of setting up and operating your 1521 Thermometer Unpacking Carefully unpack the 1521 and accessories and inspect them to make sure all components are present and in satisfactory condition Verify that the following items are present e 1521 Thermometer e AC Adapter clamp on ferrite installed e Serial Cable e User s Guide e Report of Calibration e Calibration Label e Pass code Notice e INFO CON Connector e Clamp on ferrite with instructions for probe e Probe optional must be purchased separately If all items are not present call an Authorized Service Center see Section 1 3 Use Proper Care with the 1521 and Accessories First and most important is to understand the safety issues related to the 1521 and its accessories Be aware that potential hazards exist due to high tempera tures high voltages and battery chemicals Carefully read S
34. ical shock or fire if exposed If the AC adapter is damaged in any way or becomes hot discontinue its use immediately disconnect it from any AC supply and have it replaced Do not attempt to open repair or continue using a damaged or defective AC adapter e The instrument batteries can present danger if not handled properly To avoid the risk of exposure to dangerous substances or explosion immedi ately remove the batteries and discontinue use if they leak or become damaged Never allow the batteries to be shorted heated punctured or dropped If the instrument is physically damaged immediately remove the batteries to insure that they do not become shorted While removed from the instrument store the batteries in a location so that they do not come into contact with metal or fluids that might short circuit the batteries and where they are safe from excessive temperatures Used batteries must be disposed of properly Check your local regulations for additional infor mation You may return the used batteries to the manufacturer Never dis pose of batteries in fire which may result in explosion with the possibility of personal injury or property damage e DO NOT use this instrument in combination with any probe RTD or thermistor to measure the temperature or resistance of any device that is electrically energized Severe electric shock personal injury or death may occur 1 2 2 A Cautions To avoid possible damage to the instrument
35. ies or when normally it should show the AC adapter Verify that the initialization information appears on measurements the display when the power is switched on Check to make sure that a probe is properly connected Check to make sure that the probe is programmed properly 47 1521 Handheld Thermometer Readout User s Guide 48 11 2 11 2 1 Problem Solution While attempting to measure re sistance the display shows an in correct value Poor or incorrect connection of the probe A common mistake is to connect the wires of the probe to the wrong terminals Check the wir ing carefully see Figure 6 Open shorted or damaged sensor or lead wires Check the resis tance across the sensor using a handheld DMM Also check the resis tance between common pairs of leads Check to make sure there is no conductivity between any of the leads and the probe sheath Use a good quality sensor to avoid errors caused by drift hysteresis or in sulation leakage Stem conduction error Make sure the stem of the probe is im mersed in the medium with adequate depth and a tight fit Electrical interference Intense radio frequency radiation near the 1521 or the probe can induce noise into the measurement circuits re sulting in erratic readings Try eliminating the source of interference or moving the 1521 to a different location A well grounded shielded ca ble should be used for the probe Memory Check Error CE Comme
36. igure 4 on page 19 Stand The stand at the back of the 1521 can be flipped down to prop up the in strument for better viewing Battery Compartment Behind the stand is the compartment that contains the battery pack The battery pack can be accessed if necessary by opening the bat tery cover with a small Philips screwdriver see Section 6 1 Serial Number Label Also behind the stand is the serial number label that uniquely identifies the instrument Internal Features The significant components inside the 1521 are described here Battery The 1521 has an internal rechargeable battery pack that can be re charged by the AC adapter without removing the battery It can be used and re charged many times If necessary it can be easily removed and replaced see Section 6 1 Micro controller The 1521 uses a micro controller to control all its functions The micro controller manages the measurement process retrieves measurement data from the analog to digital converter ADC places measurements and other information on the display senses button actions reads battery status in formation from the power control circuit and handles communications through the serial port Power Control Circuit The power control circuit manages the electrical power that drives all the circuits It handles switching between the two sources of power DC input and battery pack regulates voltages monitors the state of battery charge and manages battery charging
37. ime View and set the real time clock time of day Passcode Enter the passcode to advance to the protected functions Date View and set the real time clock date Probe Lock Lock or unlock operation of the unit with the current probe only Prb Set the probe serial number Prb Type Select the probe type and temperature calculation R 01 ITS 90 only Sets the R 273 16K probe coefficient a ITS 90 only Set the a5 a6 a7 a8 a9 a10 or al1 probe coefficient b ITS 90 only Set the b5 b6 b7 b8 or b9 probe coefficient c ITS 90 only Set the c6 or c7 probe coefficient d ITS 90 only Set the d probe coefficient a4 ITS 90 only Set the a4 or a5 probe coefficient b4 ITS 90 only Set the b4 or b5 probe coefficient R 0 CVD only Set the RO probe coefficient Alpha CVD only Set the alpha probe coefficient Delta CVD only Set the delta probe coefficient 29 1521 Handheld Thermometer Readout User s Guide 30 7 8 1 7 8 2 7 8 3 7 8 4 Beta CVD only Set the beta probe coefficient b0 Therm only Set the bO probe coefficient b1 Therm only Set the b1 probe coefficient b2 Therm only Set the b2 probe coefficient b3 Therm only Set the b3 probe coefficient Probe Wires Set the number of wires of the probe PCal Set the probe calibration date PDue Set the probe calibration due date Filter Set the digital filter time constant MCal Set the instrument calibrati
38. k Bre Bee ace A 4 1 Unpacking o s 2999 meh PELEAS 11 4 2 Use Proper Care with the 1521 and Accessories 11 4 3 Learn About the Features and Components 11 4 4 Connect the Probe ooo ss sms 11 4 5 Connect the Power Source o e ae sas 12 4 6 Switch the Power On llle 12 4 7 Measure Temperature s so suc wa w ei ee ee 12 5 Parts and Controls 13 5 1 Front Features uk ac bom Ho Oe od es ida da 13 3 2 Top and Side Features o o 15 5 3 Back Features 4 onsec koe der UR x ERR 16 54 Internal Features co ooe me 222 16 5 5 AGCESSOMES cams g mof eae x e pub See ahs C dow le E pue s 17 6 General Operation 19 6 1 Battery O 19 6 2 DC PowerSource si bb ee eee eee ee eee as 20 6 3 Power Button oem 6 4 a SES beeen 21 6 4 Display and Backlight o 21 6 5 PtObe embarca as Bal Ee aw 22 6 6 INFO CON Connector 0 00000 2 eee 23 7 Display Functions 0 xcs 6 4 oe Xo oO Roxio 25 7 1 Blank Mod c ca e rasa o o4 4p 26 42 Min Max Mode 27 7 3 Hold Mode rA 27 7 4 Delta x Mode 49934 REVO a BA a SS 27 7 5 MES ses nit tr AO RA xs A tod 28 7 6 EA E tae get he Gh ee ce ee 28 7 7 Resolution isis es Cee PO 6o bOS 4 vx qu 28 7 8 CAL MODES 4 63 4 bard xxx a a UE 29 7 8 1 Mtt LG e id id weh wed deca Se A d de d d ewe Be a 30 7 8 2 PIDDe g ct ote A NN 30 7 8 3 o
39. l Operation Power Button 6 3 6 4 adapter supplied with the instrument The DC power source plugs into the DC power input on the right side of the 1521 Figure 5 12V DC Power Source Polarity WARNING The AC adapter has circuits with high voltages inside that could present danger of electric shock or fire if exposed If the AC adapter is damaged in any way or becomes hot discontinue its use immediately disconnect it from any AC supply and have it replaced Do not attempt to open repair or continue using a damaged or defective AC adapter Power Button The power button controls power to the instrument and operates the backlight The following table summarizes the power button functions Function Action Power on Press the power button for at least two seconds when the power is off Power off Press the power button momentarily 1 2 second or less when the power is on Backlight on Press the power button for three seconds or more when the power is on and the backlight is off Backlight off Press the power button for three seconds or more when the backlight is on Display and Backlight The display shows measurement data and other information depending on the selected mode The upper part of the display continually shows the most recent measurement It uses large digits for easy viewing A new measurement is produced and dis played every second The unit associated with the measurement is shown in 21 1
40. n equation to calculate temperature from resistance peor n 120 100 4100 Dre t t t p Ry 1 a 1 8 1 Y Y b t lt 0 1001100 100 100 j The coefficients RO a 6 and B can be set by the user using the functions RO Alpha Delta and Beta respectively When editing Alpha there is an assumed exponent of 107 i e 3 8500 is actually 0 0038500 7 8 12 YSI 400 The YSI 400 type is for 22520 thermistors matching the characteristics of the YSI 400 series of thermistors This type of probe generally is low cost has a limited operating range 40 C to 150 C good accuracy 0 1 C to 0 4 C and excellent resolution 0 002 C There are no user programmable coefficients as sociated with this probe type Temperature is converted from resistance based upon a standard Y SI 400 table resident in the instrument 7 8 13 THERM 34 The THERM thermistor type is for thermistors that have unique calibration co efficients or do not match the YSI 400 specification This type of probe gener ally has moderate cost a limited operating range 40 C to 100 C excellent accuracy 0 005 C to 0 02 C and excellent resolution 0 002 C This type uses the Steinhart Hart equation in the following form RCTK DIQ exp b b T b T b T The coefficients bO through b3 are usually found on the calibration certificate of the probe These coefficients are set with the functions b0 b1 b2 and b3 In some cases the equ
41. national price Hart reserves the right to invoice Buyer for importation costs of repairs replacement parts when product purchased in one country is submitted for repair in another country Hart s warranty obligation is limited at Hart s option to refund of the purchase price free of charge re pair or replacement of a defective product which is returned to a Hart authorized service center within the warranty period To obtain warranty service contact your nearest Hart authorized service center or send the product with a description of the difficulty postage and insurance prepaid FOB Destination to the nearest Hart au thorized service center Hart assumes no risk for damage in transit Following warranty repair the prod uct will be returned to Buyer transportation prepaid FOB Destination If Hart determines that the failure was caused by misuse alteration accident or abnormal condition or operation or handling Hart will provide an estimate or repair costs and obtain authorization before commencing the work Following repair the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges FOB Shipping Point THIS WARRANTY IS BUYER S SOLE AND EXCULSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IM PLIED WARRANTY OF MERCHANTABLILTY OR FITNESS FOR A PARTICULAR PURPOSE HART SHALL NOT BE LIABLE FOR ANY
42. ndar Van Dusen RO Alpha Delta and Beta equation YSI400 Thermistors matching the YSI 400 series none THERM Thermistors characterized by the thermistor b0 b1 b2 and b3 polynomial Each of the conversion options is explained in the following sections along with their associated coefficients if they have any The probe type and associ ated coefficients are stored in the INFO CON probe connector Use the Up and Down buttons to select the probe type and the ENT button to store and continue Each of the coefficients that follow the probe type if there are any are set in the usual way Use the Up and Down buttons to set each digit and the ENT but ton to move to the next digit to the right Press ENT when all digits are entered 7 8 9 ITS 90 32 The ITS 90 type is for PRTs calibrated and characterized using the Interna tional Temperature Scale of 1990 equations This type of probe generally has excellent accuracy 0 005 to 0 025 C a wide operating range 180 C to 420 C or higher but may be rather expensive The coefficients that appear when ITS 90 is selected are R 01 a b c d a4 and b4 These should be set to the coefficient values that appear on the PRT calibration certifi cate according to the following table Unused coefficients must be set to 0 1521 Coefficients Certificate Value R 01 Rtpw a a5 a6 a7 a8 a9 a10 or a11 b b5 b6 b7 b8 or b9 C c6 or c7 d d a4 a4
43. nts EMC Directive Memory Error A non critical parameter is corrupt in memory The non critical praameters are Units Rate Resolution Filter and serial port settings Press any key and the display reads Check Settings Press any key again to resume normal operation Check your current settings for the specific parameters that were set Memory Recover X A critical parameter is corrupt and the 1521 can recover the correct value for that parameter The critical parameters are CAL1 CAL2 Passcode Meter Due Date Meter Cal Date and Serial Number Press any key and the display reads Check Settings Press any key again to resume normal operation Also check non critical settings as in the Memory Error above The number following the message is used by authorized technicians Memory Invalid A critical parameter is corrupt and the 1521 cannot recover the cor rect value for the parameter The critical parameters are CAL1 CAL2 Passcode Meter Due Date Meter Cal Date and Serial Number Press any key and the display reads Contact Factory Contact an Authorized Service Center see Section 1 3 for assistance in guiding you through the process of reentering critical parameters Note The parameters stored in the INFO CON Probe Wires Probe Type Probe Parameters are not checked by the meter during mem ory testing Hart Scientific s equipment has been tested to meet the European Electromag netic Compatibility Directi
44. o user x Character data returned to user 8 2 2 Calibration Commands The following group of commands directly or indirectly affect the accuracy of the instrument These commands should only be used by qualified authorized personnel Calibration parameters can only be changed if protection is dis abled by entering the proper pass code using the command pas ddddd Entering an invalid passcode or cycling the power re establishes protection of the calibration parameters The parameters can be read without disabling the passcode protection Response Response Description Command Example Format Example Range Unprotect calibration parame pas scode nnnnn pas 12345 ters with the pass code Read date da te date da yyyy mm dd da 1999 03 28 Read passcode protection pas pas ps 9 ps 0 0or1 state Set date da te yyyy mm dd da 1999 03 28 1999 01 01 to 2100 12 31 Read probe serial number se rial ser Ser XXXXXXXXXX ser 100231A Set probe serial number se rial xXxXxxXXXXXX ser 001 0 to 9 AtoZ al Read probe type p robe pr pr ITS 90 IEC751 pr ITS 90 CVD YSI400 THERM 39 1521 Handheld Thermometer Readout User s Guide Response Response Description Command Example Format Example Range Set probe type p robe IT S 90 pr ITS 90 IE C751 C VD IEC751 Y SI400 T HR CVD YSI400 THERM Read ITS 90 R 01 or CVD RO r 0 10 r0 9999 999 r0 100 035 Set ITS 90 R 01
45. on date MDue Set the instrument recalibration due date CALI Set the 0 to 400Q instrument calibration parameter CAL2 Set the 400Q to 500 KQ instrument calibration parameter The calibration functions are described in detail in the following subsections Mtr Due This function displays the date the 1521 is due for calibration The date cannot be changed with this function Prb Due This function displays the date the probe is due for calibration The date is stored in the INFO CON probe connector The date cannot be changed with this function Time This function displays and sets the time of day The time is always set dis played or printed in 24 hour format To set each time segment use the Up and Down buttons Use the ENT button to move between time segments and to save the changed values The CLR button moves to the next function Passcode All functions below this function are protected by a pass code so that only au thorized users can access them The passcode must be entered correctly to con tinue If the passcode is entered incorrectly or the MODE or CLR buttons are pressed the message Invalid Passcode is displayed and the instrument is re turned to the next display mode after the display mode that was active before the CAL Mode was entered Each individual instrument has its own unique passcode The passcode number is given on a notice provided with this instrument The equipment manager is responsible for k
46. ou can increase the filter time constant to further im prove accuracy and resolution or decrease the time constant to reduce the re sponse time Valid values are any number between 0 0 and 60 0 seconds A value of 0 0 disables the filter The default is 0 0 Use the Up and Down but tons to set the value and press the ENT button to store and continue Press CLR to move to the next function without changing the filter MCal This function shows the date the 1521 was calibrated and allows it to be set The date is used simply for reference Use the Up and Down buttons to set each date segment and the ENT button to move to the next date segment on the right Press ENT when the date is correctly entered Press CLR to move to the next function without changing the date MDue This function shows the date the 1521 is due for calibration and allows it to be set The meter calibration due date is regularly checked against the present date and if the calibration has expired the user is alerted with the message Mtr cal expired The message will only disappear when the 1521 is recalibrated and the meter calibration due date is set to a future date To set the meter calibration due date use the Up and Down buttons to set each date segment and the ENT button to move to the next date segment to the right Press ENT when the date is correctly entered Press CLR to move to the next function without changing the date CAL1 and CAL2 The CAL1 and CAL2 me
47. overheated It can be easily damaged 1f misused For further suggestions on handling the probe and using the 1521 and probe to measure temperature accurately see Section 6 5 For information on the various modes of operation of the 1521see Section 7 5 Parts and Controls Front Features 5 Parts and Controls The functions of the various features of the 1521 are described below 5 1 Front Features The front of the 1521 features the LCD display and control buttons Display Power and Backligh Button ENT Butter Enter CLR Button Clear MODE Buiter Up and Down Buttons Hart Scientific 1521 THERMOMETER READOUT Figure 1 Frontofthe 1521 13 1521 Handheld Thermometer Readout User s Guide 14 Display The display shows the current temperature or resistance measure ment on the large numeric upper portion of the display It can also show a vari ety of information on the smaller alphanumeric lower portion such as minimum maximum hold temperatures delta x and other instrument settings Power and Backlight button This button turns the instrument on or off If the power is on pressing the button for three seconds toggles the backlight on or off see Section 6 3 Note using the backlight drains the battery more quickly ENT enter button This button is pressed to accept changes to a setting and in some modes to store the most recent measurement CLR clear button This button cancels ch
48. play This mode allows you to set the samples that are transmitted through the serial port The sample for a 2 wire and a 4 wire probe is approximately one second and for a 3 wire probe is approximately two seconds For example if the rate is set to 2 every other sample is sent through the serial interface Note If the probe wire is set to 3 the time between samples is twice as long A value of 0 disables transmission The Up and Down buttons are used to increase or de crease the value for the underlined digit The ENT button moves to the next digit If the ENT button is pushed when the last digit is underlined the setting is stored If the MODE button or CLR button is pressed the value remains un changed Once the value is set measurements are transmitted through the serial port at the given interval Resolution This mode is identified by Resol XXX XXX that appears on the display This mode allows you to set the resolution of measurements to one two or three digits after the decimal point The Up and Down buttons are used to in crease or decrease the resolution setting The ENT button stores the setting If the MODE button or CLR button is pressed the setting remains unchanged Once the resolution is set measurements are displayed and transmitted from the serial port at the given resolution if possible The resolution may be reduced if necessary for large values of temperature or resistance 7 Display Functions CAL MODE
49. rized Service Centers to coordinate service on your Hart product Fluke Corporaton Hart Scientific Division 799 E Utah Valley Drive American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com Fluke Nederland B V Customer Support Services Science Park Eindhoven 5108 5692 EC Son NETHERLANDS Phone 31 402 675300 Telefax 31 402 675321 E mail ServiceDesk fluke nl Fluke Int l Corporation Service Center Instrimpex Room 2301 Sciteck Tower 22 Jianguomenwai Dajie 1 Before You Start Authorized Service Centers Chao Yang District Beijing 100004 PRC CHINA Phone 86 10 6 512 3436 Telefax 86 10 6 512 3437 E mail xingye han fluke com cn Fluke South East Asia Pte Ltd Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace 03 16 The Comtech Lobby D 118502 SINGAPORE Phone 65 6799 5588 Telefax 65 6799 5588 E mail antngOsinga fluke com When contacting these Service Centers for support please have the following information available Model Number Serial Number Voltage Complete description of the problem 2 Introduction Introduction The 1521 Handheld Thermometer Readout is a low cost high accuracy digital thermometer readout designed to be used with PRTs and thermistors The unique combination of features makes this instrument suitable for a wide vari ety of applications in industry Features and capabilities
50. s sub jected to EFT conditions at 2kV the instrument may require the user to cycle the power to return to normal operation Emission Testing The instrument fulfills the limit requirements for Class A equipment but does not fulfill the limit requirements for Class B equipment The instrument was not designed to be used in domestic establishments Low Voltage Directive Safety In order to comply with the European Low Voltage Directive 73 23 EEC Hart Scientific equipment has been designed to meet the IEC 1010 1 EN 61010 1 and the IEC 1010 2 010 EN 61010 2 010 standards 49
51. set to ohms The 4 KQ 10 KQ 40 KQ 100 kQ and 500 kQ resistors must be programmed with the THERM probe type with units set to ohms Calibration Procedure Calibration requires adjustment of the CALI and CAL2 parameters at 100Q and 10 kQ respectively see Section 7 8 20 The calibration parameters can be accessed from the front panel by pressing the MODE button and holding it for three seconds releasing it then pressing the ENT button see Section 7 8 You must enter the pass code to continue see Section 7 8 4 The step by step pro cedure is as follows 1 Connect the 100Q resistor Adjust the CAL1 parameter by subtracting the measured error For example if the resistor is exactly 100 000Q and the 1521 measures 100 029Q CAL1 should be adjusted by subtracting 0 029 from the current value of CALI 2 Verify the accuracy at 0Q 250 1000 and 4000 3 Connect the 10 kQ resistor Adjust the CAL2 parameter by subtracting the measured error For example if the resistor is exactly 10 0000 KQ and the 1521 measures 10 0029 kQ CAL2 should be adjusted by subtracting 2 9 from the current value of CAL2 43 1521 Handheld Thermometer Readout User s Guide 4 Verify the accuracy at 00 4kQ 10 kQ 40 kQ 100 kQ and 500 kQ 5 Set the meter calibration date to the present date see Section 7 8 18 6 Set the meter due date to one year from the present date see Section 7 8 19 44 10 Maintenance 10 Maintenance e This ins
52. ter calibration parameters calibrate the 0 to 5000 measurement range and the 0 to 500 kQ measurement range respectively These parameters directly affect the accuracy of the 1521 and are only to be altered by an authorized qualified technician as part of a regular instrument calibration operation Refer to the calibration procedure in Section 9 Use the Up and Down buttons to set the value and press the ENT button to store and continue Press CLR to move to the next function without changing the date 8 Communications Interface RS 232 Connection 8 1 Communications Interface Remote communications allows an external device such as a computer to com municate with the 1521 to obtain measurement data and control its operation Communication is accomplished with various commands issued to the 1521 through the RS 232 serial port RS 232 Connection The three conductor jack for the serial port is located on the top of the 1521 near the probe connector One serial cable is included with the 1521 Additional or longer cables of three meters or less can be constructed by following the wiring diagram shown in Figure 8 Note The TxD line on one side connects to the RxD line on the other and vice versa To reduce the possibility of elec trical interference the serial cable should be shielded with low resistance be tween the connector and the shield It should not be much longer than is necessary The protocol for serial communications is 8 dat
53. terminals Before opening the INFO CON case be sure to be grounded with an ESD strap to avoid damaging the memory chip For four wire probes one pair of wires at taches to terminals C1 and P1 and the other pair attaches to terminals C2 and P2 C1 and C2 source current and P1 and P2 sense the potential If a shield wire is present it should be connected to the GND terminal see Figure 6 A three wire or two wire probe can also be used with the 1521 A three wire probe is connected by attaching the common wires to the C1 and P1 terminals and the other wire to the C2 and P2 terminals The two wire probe is connected by one wire to the C1 and P1 terminals and the other wire to C2 and P2 Again any shield wire should be connected to the GND terminal see Figure 6 Rec 23 1521 Handheld Thermometer Readout User s Guide ognize that accuracy may be significantly degraded using a two wire connec tion because of wire resistance Four wire Connection Three wire Connection Two wire Connection Figure 6 Probe Wiring Diagrams 24 7 Display Functions Display Functions The 1521 operates in any of several modes which determine what information is visible in the lower alphanumeric portion of the display The MODE button changes the mode This button can be pressed repeatedly until a desired mode 1s set The various modes are listed below in the order they appear See Figure 7 Blank No data shown Min Max Minimum and maximum
54. trument has been designed with the utmost care Ease of operation and simplicity of maintenance have been a central theme in the product development Therefore with proper care the instrument should require very little maintenance Avoid operating the instrument in oily wet dirty or dusty environments e If the outside of the instrument becomes soiled it may be wiped clean with a damp cloth and mild detergent Do not use harsh chemicals on the surface which may damage the LCD or the plastic outside shell e Ifa hazardous material is spilt on or inside the equipment the user is re sponsible for taking the appropriate decontamination steps as outlined by the national safety council with respect to the material e Before using any cleaning or decontamination method except those rec ommended by Hart users should check with an Authorized Service Center to be sure that the proposed method will not damage the equip ment e Ifthe AC adapter becomes damaged have it replaced immediately Never disassemble the AC adapter or attempt to repair it e If the instrument is used in a manner not in accordance with the equip ment design the operation of the thermometer may be impaired or safety hazards may arise 45 11 Troubleshooting An Error Message Is Displayed 11 11 1 Troubleshooting In case you run into difficulty while operating the 1521 this section provides some suggestions that may help you solve the problem Below are s
55. um ma ximum max max 999 999 max 416 781 C C O F R or Kj Clear minimum and maximum cl ear clear Read a hold register h Id n hld6 hid lt n gt 999 999 C O F hld6 26 553 C n can be 1 to R or K 6 Store present measurement to next s tore store available hold register Read delta x measurement dx dx dx 999 999 dx 0 118 C C O F R or K Set delta x reference to present sd x sd measurement Read unit u nit u u C O F R or K u C Set unit u nit C O F K u C C O F K R R Read serial sample rate sa mple sa sa 9 sa 10 Set serial sample rate sa mple s Sa 60 0 to 10 000 Read resolution digits re solution res res 9 res 3 38 8 Communications Interface Communication Command List Response Response Description Command Example Format Example Range Set resolution digits re solution n res 1 1103 Read time ti me time ti hh mm ss ti 16 23 45 Set time ti me hh mm s ti 08 15 0 00 00 00 to Note You must set hours min s 0 23 59 59 utes and seconds for the time to be set correctly Read identification information i dn idn lt manufacturer gt Bidt lt model gt 1521 lt serial number gt 95001 lt firmware version gt Read model and firmware version v ersion ver ver lt model gt ver 1521 firmware version 2 11 Legend Optional Command data Returns either information n Numeric data supplied by user 9 Numeric data returned t
56. ve EMC Directive 89 336 EEC The Declaration of Conformity for your instrument lists the specific standards to which the unit was tested 11 Troubleshooting CE Comments 11 2 1 1 11 2 1 2 11 2 2 The instrument was designed specifically as a test and measuring device Com pliance to the EMC directive is through IEC 61326 1 Electrical equipment for measurement control and laboratory use EMC requirements 1998 As noted in the IEC 61326 1 the instrument can have varying configurations The instrument was tested in a typical configuration with shielded grounded probe and RS 232 cables Emissions may in non typical applications exceed the levels required by the standard It is not practical to test all configurations as the manufacturer has no control over the probes the user may connect to the instrument Immunity Testing The instrument was tested to the requirements for industrial locations This al lows the instrument to be used in all types of locations from the laboratory to the factory floor Criterion B was used for Radiated RF IEC 61000 4 3 and Conducted RF IEC 61000 4 6 Therefore the operation of the instrument may be affected by excessive electromagnetic interference and the instrument may not perform within the normal specification limits in such an environment Criterion C was used for Electrostatic Discharge ESD IEC 61000 4 2 and Electric Fast Transit EFT Burst IEC 61000 4 4 If the instrument i
57. y mm dd 1999 03 28 Set meter due date md ue yyyy mm dd md 1999 03 28 1999 01 01 to 2100 12 31 Legend 40 Optional Command data Returns either information 8 Communications Interface Communication Command List Response Response Description Command Example Format Example Range n Numeric data supplied by user 9 Numeric data returned to user x Character data returned to user 41 9 Calibration Required Equipment 9 1 9 2 Calibration The 1521 should be calibrated at regular intervals to ensure that it continues to measure with proper accuracy Calibration should only be done by qualified authorized personnel Required Equipment The following items are required to test and calibrate the 1521 e QQ four wire resistor short e 250 four wire resistor uncertainty within 20 ppm 0 0005Q e 100 four wire resistor uncertainty within 20 ppm 0 002Q e 400Q four wire resistor uncertainty within 20 ppm 0 008Q e 4kQ four wire resistor uncertainty within 50 ppm 0 2Q e 10 KQ four wire resistor uncertainty within 50 ppm 0 5Q e 40 KQ four wire resistor uncertainty within 50 ppm 2Q e 100 KQ four wire resistor uncertainty within 50 ppm 50 e 500 KQ four wire resistor uncertainty within 75 ppm 37 5Q Each resistor must be attached with an INFO CON probe connector The 25Q 100Q2 and 4000 resistors must be programmed with the CVD probe type with units
58. y removed and replaced in the field by following this procedure 1 Power the 1521 off and unplug the AC adapter from the unit 2 With the 1521 facing down lift the stand to expose the battery cover see Figure 4 Remove the battery cover screw with a small Philip s screw driver Place the screw in a safe place so it won t get lost Remove the battery cover to access the battery pack 3 Pull the battery pack out Note the orientation of the battery plug on the connector The new battery pack will be plugged in the same direc tion Gently pull the battery plug off the connector 4 Attach the polarized plug of the new battery pack onto the connector in the same direction as before see Figure 4 on page 19 Place the battery pack in the battery compartment Close the battery cover and replace the screw 6 Plug in the AC adapter and charge for a minimum of four hours for its initial charge WARNING Used batteries must be disposed of properly Check your lo cal regulations for additional information You may return used batteries to the manufacturer Never dispose of batteries in fire as this may result in explosion with the possibility of personal injury or property damage DC Power Source The DC power source provides power to charge the battery It can also be used to power the 1521 while the battery is being charged The AC adapter provided with the 1521 is intended to be used for these purposes Use only the AC 6 Genera
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