Fluke 5520A - Page 120

5520A
Operators Manual
4-40
4-32. Setting Temperature Simulation (Thermocouple)
Note
Thermocouples have no electrical isolation.
Make sure the thermocouple wire and plug are not affected by extraneous
temperature sources. For example, do not place your fingers on the
thermocouple plug or wire when simulating a temperature.
Thermocouples generate a small dc voltage at specific temperatures. The simulated
output, therefore, is a small dc voltage based on the selected temperature and type of
thermocouple being simulated. To toggle the temperature reference between the 1968
International Provisional Temperature Standard (ipts-68) and the 1990 International
Temperature Standard (its-90), see “Using the Instrument Setup Menu.”
Complete the following procedure to set a simulated thermocouple temperature output at
the 5520A front panel TC connector. If you make an entry error, press Gto clear the
display, then reenter the value.
1. Press R to clear any output from the 5520A.
2. Connect the UUT as described earlier in this chapter under “Connecting the
Calibrator to a UUT.”
Note
You must use thermocouple wire and miniconnectors that match the type of
thermocouple. For example, if simulating a temperature output for a type K
thermocouple, use type K thermocouple wire and type K miniconnectors.
3. Set the UUT to measure temperature on the desired range.
4. Press the numeric keys and decimal point key to enter the desired temperature output
(maximum 6 numeric keys). For example, 123.456.
5. For an output in °C, press the C key. For an output in °F, press S and then the
C key.
6. The Control Display now shows the amplitude of your temperature output. For
example, 123.456 °C (below).
nn102f.eps
7. Press E. The calibrator clears your entry from the Control Display and copies
it into the Output Display (below is typical).
nn103f.eps
8. Press O to activate the calibrator output. Four softkey labels appear on the
Control Display.