ADM-860C 04/14/0837
Place each of the temperature probes in the system as required and allow the probe temperatures to stabilize.
A typical system testing application is shown in Figure 8.2. Set the meter for the temperature function as
discussed in Section 5.0 USING THE AIRDATA MULTIMETER. Set the MultiTemp for switch position #1 and
take a reading for the probe connected to temperature input jack #1. Turn the switch to position #2 and take
a reading for temperature jack #2. Continue for as many of the eight temperature jacks as needed.
The individual storage function may also be used with the MultiTemp. Select the STORE mode and then take
as many readings as needed for each of the switch positions. Careful recording of which switch position
readings are entered into memory under which sequence tag is essential to accurate recall of readings for
performance calculations.
FIGURE 8.2 AIRDATA MULTITEMP
Additional points may be measured in the same measurement sequence by using more than one MultiTemp
switch unit connected in series (piggybacking). Reading and memory entry of 64 temperature points would take
about two minutes (after temperature probes have stabilized). Connect the primary MultiTemp module to the
meter as described above. Connect the output jack of each secondary MultiTemp to the input jack of the
primary MultiTemp using plug adapter P/N PA-447. Each switch position of the primary MultiTemp can support
up to eight switch positions on a secondary MultiTemp. The temperature probes used with the MultiTemp and
AirData Multimeter are typically interchangeable.
These probes may be used in any liquid or gas compatible with stainless steel. Typical uses include: wet or
dry bulb air temperatures; thermometer wells; "Pete's" plugs; or direct immersion. Some applications include
humidity control systems; direct expansion A/C systems; outside air adjustment; hot water heating; chilled water;
condenser water; and many other circulating process liquid systems.
The surface probes may be used to measure pipeline surface temperatures when piping systems do not have
thermometer wells. These probes may also be used as fast acting air probes.
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