Performance Verification 1-15
Verifying temperature
Thermocouple, thermistor, and RTD temperature readings are derived from DC volts and
resistance measurements respectively. For that reason, it is not necessary to independently ver-
ify the accuracy of temperature measurements. As long as the DC volts and resistance functions
meet or exceed specifications, temperature function accuracy is automatically verified. How-
ever, temperature verification procedures are provided below for those who wish to separately
verify temperature accuracy.
Thermocouple temperature
1. Connect the DC voltage calibrator output terminals to the Model 2700 INPUT jacks
using low-thermal shielded connections. (Use 2-wire connections similar to those
shown in Figure 1-1.) Be sure the INPUTS switch is in the FRONT position.
2. Configure the Model 2700 for °C units, type J temperature sensor, and 0°C simulated
reference junction as follows:
a. Press SHIFT then SENSOR, and note the unit displays the temperature units:
UNITS: C. (If necessary, use the cursor and range keys to select °C units.)
b. Press ENTER. The unit displays the sensor type: SENS: TCOUPLE.
c. Make sure that TCOUPLE is displayed, then press ENTER. The unit then displays
the thermocouple type: TYPE: K.
d. Select a type J temperature sensor, then press ENTER. The unit then displays the
reference junction type: JUNC: SIM.
e. Make certain that the simulated reference junction type is selected, then press
ENTER. The unit then displays the current simulated reference junction tempera-
ture: SIM: 023.
f. Using the cursor and range keys, set the reference junction temperature to 0°C,
then press ENTER twice to complete the temperature configuration process.
3. Select the temperature function by pressing the TEMP key.
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