Model 7700 Multiplexer Module Instructions for use with DAQ6510
20 077144300 / April 2018
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 verify the accuracy of
temperature measurements. If the DC volts and resistance functions meet or exceed specifications,
temperature function accuracy is automatically verified.
You can verify temperature accuracy using the following procedures (Thermocouple temperature (on page 20
)
and RTD temperature (on page 21)).
Thermocouple temperature
This setup and reading limits table below does not include errors from ice point, thermocouple wire, and
connections. HI and LO connections from the calibrator and 7700 must be electrically isolated from each other.
To verify the thermocouple temperature:
1. Connect the DC voltage calibrator output terminals and ice point reference to the CH1 H and L INPUT
terminals of the module using low-thermal shielded connections, as shown in the next figure.
Figure 10: Connections for thermocouple temperature verification
2. Install the module in Slot 1 of the DAQ6510.
3. Turn on the power.
4. Allow the instrument to warm up for one hour.
5. Make sure that the front-panel TERMINALS switch is set to REAR.
6. On the front panel of the instrument, select the FUNCTION key and then select Temperature.
7. On the Home screen, swipe to the CHANNEL swipe screen.
8. Close channel 101.
9. Set the channel to temperature.
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