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9.7 How to Calibrate the Master Meter Temperature Probe
All Master Meters except 80M
1.
Remove the four screws holding the cover plate on the Master Meter Junction Box.
All Master Meters
2
. Connect the Master Meter cable to the Master Meter to be calibrated.
3.
Make sure that the proper meter capacity is selected in the box labeled “Select
Master Meter Type”.
4.
Remove the Master Meter temperature probe from its well. Do not disconnect any wiring.
5.
Using a rubber band, attach the Master Meter temperature probe to a sensing device that will
serve as a temperature standard. Immerse both into a liquid container that is already at the
temperature at which the test will be conducted. Make sure that the liquid is gently stirred to
equalize the temperature throughout the container.
It is important that there is no greater than ±1°F difference between the temperature of the
liquid in the container and the testing temperature. In addition, ensure that the temperature of
the liquid in the container is extremely stable and that the temperature standard has an
uncertainty of no more than ±0.20°F.
Before completing the next step, make sure that both the reference temperature and the
value displayed in the box labeled Count have stabilized.
6.
Type in the reference temperature as measured by the temperature standard, then click on the
<Accept> button at the bottom of the screen.
7.
The Calibration Instructions box on the screen now indicates to remove the Master Meter
temperature probe and let it stabilize. Leave both the temperature probe and the temperature
standard in the liquid container, and click on the <Accept> button at the bottom of the screen.
The recalibration of the Master Meter temperature probe is now complete and the new
setting and current date are saved.
8.
Remove both the Master Meter temperature probe and the temperature standard from the
liquid container. Remove the rubber band holding them together and carefully dry both probes.
9.
Re-insert the Master Meter temperature probe into its well and secure it in place.
All Master Meters except 80M
10.
Re-attach the Master Meter cover plate and tighten all four screws.
9.8 How to Calibrate the Field Meter Temperature Probe
1.
Make sure that the Field Meter Junction Box cable is connected to the Controller.
2.
Connect the Field Meter temperature probe to the Field Meter Junction Box at the
port labeled TEMP PROBE.
3.
Using a rubber band, attach the Field Meter temperature probe to a sensing device that will
serve as a temperature standard. Immerse both into a liquid container that is already at the
temperature at which the test will be conducted. Make sure that the liquid is gently stirred to
equalize the temperature throughout the container.
It is important that there is no greater than ±1°F difference between the temperature of the
liquid in the container and the testing temperature. In addition, ensure that the temperature of
the liquid in the container is extremely stable and that the temperature standard has an
uncertainty of no more than ±0.20°F.
Before completing the next step, make sure that both the reference temperature and the
value displayed in the box labeled Count have stabilized.
