Fluke Thermometer 1504 User Manual

1504Thermometer ReadoutUser’ s GuideRev. 571202 ENGHart Scientific

1.2.2CautionsTo avoid possible damage to the instrument, follow these guidelines.DO NOT change the values of the calibration constants from the factor

Phone: +1.801.763.1600Telefax: +1.801.763.1010E-mail: [email protected] Nederland B.V.Customer Support ServicesScience Park Eindhoven 51

When contacting these Service Centers for support, please have the followinginformation available:•Model Number•Serial Number•Voltage•Complete descrip

2 IntroductionThe 1504 Thermometer Readout is a low-cost high-accuracy digital thermome-ter readout designed to be used with thermistors or RTDs with

3 Specifications and EnvironmentalConditions3.1 SpecificationsResistance range0to1MΩ, auto-rangingResistance accuracy, oneyear10to5kΩ:0.5Ω5kΩto 200 kΩ

CommunicationsRS-232 serial standard,IEEE-488 (GPIB) optional, Conforms to IEEE-488.1, Capability: AH1,SH1, T6, L4, DC1Operating TemperatureRangeFull

4 Quick StartThis section briefly explains the basics of setting up and operating your 1504thermometer readout.4.1 UnpackingUnpack the thermometer car

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

ductor is positive and the inside is negative. When operating in DC mode, theAC power switch on the rear panel is not functional.The optional 9313 Bat

NOTE: The DC power option includes a low voltage indicator. The lowvoltage indicator needs to be plugged into the instrument with the batteryoption pl

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

5 Parts and Controls5.1 Front Panel ButtonsSee Figure 3.The front panel buttons are used to select units of measurement, access operat-ing parameters,

5.2 Rear PanelSee Figure 4.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 1504 Thermometer.6.1 Selecting UnitsTemperature can be displayed in degrees Celsius (i

1504 Thermometer ReadoutUser’s Guide18MenuSample Comm (Cal)ProbeSet clockSet filterSet probe type Enter passwordSet time stampSet coefficients Set men

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

E -04Increase or decrease the exponent using the U and D buttons. Once the ex-ponent is correct, press Enter to store it.6.4.3 Steinhart-Hart Ch

b=4.6354171E03, c=-1.2531030E05, and d=-6.2365913E06. Set the 1504 pa-rameters with values from the certificate as follows.Example 2:A thermistor’s ca

[]()()()[]rt CRAtBRAtBtCt ttt°=++++ + −≥<⎧⎨⎩⎪0202311 10000The A, B, and C coefficients can be converted to α, δ,andβ coefficients usingthe followin

play as an indication that the 1504 is still operating. Pressing any button on thefront panel restores the display. You can program the power saver to

7 Digital Communications InterfaceRemote communications allows an external device, such as a computer, to com-municate with the 1504 to obtain measure

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

7.1.2 Automatic Transmission of MeasurementsThe 1504 can be programmed to automatically send measurements to a remoteprinter or terminal. The transmis

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

7.2.1 Setting the AddressThe IEEE-488 bus requires that each device has a unique address. The defaultaddress of the 1504 is 22 but can be changed if n

297 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

SA=5:00<EOS> sets the sample period to 5 minutesSA=1:00:00<EOS> sets the sample period to 1 hour7.3.1.3 Selecting the Unit of MeasurementT

Bn=<value><EOS> sets b0, b1, b2, or b3for the thermistor characterization.n is a number from 0 to 3.7.3.2.2 Testing the CharacterizationTh

7.3.4.1 Setting the Duplex ModeWhen the RS-232 duplex mode is set to FULL all commands received by the1504 from the RS-232 port are echoed back. Setti

7.3.5.4 Setting the Serial NumberThe following command is used to set the serial number of the 1504:*SN=<value><EOS> sets the instrument’s

8 Calibration ProcedureThe 1504 uses a three-point calibration scheme with a quadratic polynomialcorrection function to maintain the accuracy of its r

7.1 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 257.1.1 Setting the Baud Rate . . . . . . .

8.2 Calibration ProcedureCalibration requires four-wire 10 kΩ and 100 kΩ resistors of 25 ppm uncer-tainty and a 0Ω resistor (or short). For verificati

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 1504, 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 12 V DC power source polar

ivTablesTable1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1Table 2 Typical Values for Thermistor C

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