Fluke HART SCIENTIFIC 1502A User Manual

1502AThermometer ReadoutUser’ s GuideRev. 722101 ENGHart Scientific

Keep the probe wires clean and away from fluids.1.3 Authorized Service CentersPlease contact one of the following authorized Service Centers to coordi

Fluke South East Asia Pte Ltd.Fluke ASEAN Regional OfficeService Center60 Alexandra Terrace #03-16The Comtech (Lobby D)118502SINGAPOREPhone: +65 6799-

2 IntroductionThe 1502A is a low-cost high-accuracy digital thermometer readout designed tobe used with 25Ω and 100Ω RTDs and SPRTs. Its unique combin

3 Specifications and EnvironmentalConditions3.1 SpecificationsResistance Range0Ωto 400Ω, auto-rangingResistance Accuracy, one year10Ωto 20Ω: 0.0005Ω20

Weight2.2 lb. (1.0 kg)SafetyOVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 perIEC 1010-11Accuracy specifications apply within the recommen

4 Quick StartThis section briefly explains the basics of setting up and operating your 1502Athermometer readout.4.1 UnpackingUnpack the thermometer ca

to pins 4 and 5. (Pins 1 and 5 source current and pins 2 and 4 sense the poten-tial.) If a shield wire is present it should be connected to pin 3.A tw

5 Parts and Controls5.1 Front Panel ButtonsSee Figure 2.The front panel buttons are used to select units of measurement, access operat-ing parameters,

5.2 Rear PanelSee Figure 3.Serial Port - The DB-9 connector is for interfacing the thermometer to a com-puter or terminal with serial RS-232 communica

6 General OperationThis section explains basic operation of the 1502A Thermometer.6.1 Selecting UnitsTemperature can be displayed in degrees Celsius (

Limited Warranty & Limitation of LiabilityEach product from Fluke Corporation, Hart Scientific Division ("Hart") is warranted to be free

1502A Thermometer ReadoutUser’s Guide16MenuSample Comm (Cal)ProbeSet clockSet filterSet probe type Enter passwordSet time stampSet currentSet coeffici

when all the digits are correct. If the password is entered correctly the first pa-rameter in the menu will appear.6.4 Selecting the Probe Characteriz

digit will flash. Use the U and D buttons to change a digit. Once the sign anddigits are correct, press Enter to accept the number. If you decide to c

Example 1:A PRT was calibrated to ITS-90 and its calibration certificate states values forcoefficients Rtpw, a4, b4, a8, and b8. Set the 1502A paramet

Example 3:A PRT was calibrated to ITS-90 and its calibration certificate states values forcoefficients R(273.16K), a6, b6, c6, and d. Set the 1502A pa

6.4.5 IPTS-68 ConversionThe IPTS-68 characterization converts resistance to temperature according tothe International Practical Temperature Scale of 1

Compare this temperature with the temperatures listed on the probe calibrationreport to verify that the coefficients you entered are correct.6.5 Filte

7 Digital Communications InterfaceRemote communications allows an external device, such as a computer, to com-municate with the 1502A to obtain measur

7.1.2 Automatic Transmission of MeasurementsThe 1502A can be programmed to automatically send measurements to a re-mote printer or terminal. The trans

to the time stamp parameter. The display will briefly show “ti Sta” then thetime stamp state which is either ON or OFF. Use the U and D buttons tochan

Table of Contents1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Symbols Used . . . . . . .

7.2.1 Setting the AddressThe IEEE-488 bus requires that each device has a unique address. The defaultaddress of the 1502A is 22 but can be changed if

277 Digital Communications InterfaceRemote CommandsCommand DescriptionMeasurement CommandsT read measurement (includes label, unit, and time)F[ETCH?]

7.3.1.1 Reading TemperatureThe most recent temperature measurement can be read using the followingcommand:T<EOS> reads the most recent measureme

7.3.1.2 Automatically Transmitting MeasurementsBy setting the sample period, the 1502A can be programmed to automaticallytransmit measurements from th

7.3.2.1 Selecting the CharacterizationThe following commands can be used to select the probe characterization andcoefficients:P=90<EOS> selects

7.3.3.1 Setting the FilterThe filter helps to reduce variations in the measurements. The filter can be setremotely using the command:FI=<value>&

LF=OF<EOS> disables linefeed7.3.5 Calibration CommandsThe following commands are used in calibrating the instrument.7.3.5.1 Entering the Passwor

ver.mmmmm,v.vvThe m’s represent digits of the model number. The v’s represent the digits ofthe firmware version number. As an example, if the version

8 Calibration ProcedureThe 1502A uses a three-point calibration scheme with a quadratic polynomialcorrection function to maintain the accuracy of its

power. The *C0=<value><EOS>, *C1=<value> <EOS>, and*C4=<value><EOS> commands can be used to set the values of the

7 Digital Communications Interface . . . . . . . . . . . . . . . 237.1 Serial Interface . . . . . . . . . . . . . . . .

9 Maintenance•The calibration instrument has been designed with the utmost care. Easeof operation and simplicity of maintenance have been a central th

10 TroubleshootingIn case you run into difficulty while operating the 1502A, this section providessome suggestions that may help you solve the problem

•Stem conduction error. The problem may be that the actual temperatureof the sensor is not what you expect. This is often the result of stem con-ducti

10.1.1.1 Immunity TestingThe instrument was tested to the requirements for industrial locations. This al-lows the instrument to be used in all types o

iiiFiguresFigure 1 Connecting a four-wire probe . . . . . . . . . . . . . . . . . . . . . . 12Figure 2 1502A Front Panel . . .

ivTablesTable1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1Table 2 Matching Certificate Values to

1 Before You Start1.1 Symbols UsedTable 1 lists the symbols that may be used on the instrument or in this manualand the meaning of each symbol.Symbol

Symbol DescriptionOnCanadian Standards AssociationOVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re-fers to the level of Imp

Before initial use, or after transport, or after storage in humid or semi-humidenvironments, or anytime the instrument has not been energized for more