Fluke 1504 6.4 Selecting the Probe Characterization

when all thedigits are correct. If the password is entered correctly the first pa-

rameter inthe menu will appear.

6.4 Selecting the Probe Characterization

Before the 1504 can measure temperature accurately it must knowhow to cal-

culate temperature from the resistance of the sensor.You must enter the proper

characterization coefficients.The co efficientsare determined when the p robe is

calibrated.

Twotypes of characterizations can be used with the 1504: Steinhart-Hart and

Callendar-VanDusen.

The probe characterization type and characterization coefficientsare set in the

Probemenu. Press the Menu/Enter button (“SEt? ” appears), then the

C/Probebutton. The menu name, “ProbE”, will appear briefly then the char-

acterization type. The probe characterization typesare indicated on the display

as follows:

Pr= thr Steinhart-Hart thermistor

Pr= rtd Callendar-Van Dusen RTD

Select the desired probe characterization type using the Uand Dbuttons

and pressing the Menu/Enter button.After the characterization type is se-

lected the characterization coefficientsfo llow.

Probe characterization coefficients are setw ithin the Probemenu after select-

ing the probe characterization type. Each coefficientappears with the name of a

coefficientshown briefly followed by its value. The mantissa with its sign ap-

pears first(positive sign appears as “+”).

Use theLand Rbuttons to move between the digits (and the sign).

The selected digit will flash.Use the Uand Dbuttons to change a

digit.Once the sign and digits are correct, press Enter to accept the num-

ber.If you decide to cancel any changes you have made, you may do so by

pressing the /Exit button. This will immediately skip to the next coefficient.

The exponentof the coefficient is set after the mantissa.

6 General Operation

Selecting the Probe Characterization