Shortridge Instruments Airdata ADM-870, Руководство по эксплуатации

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ADM-870 05/23/08 25
8.0 TEMPERATURE MEASUREMENT
8.1 TEMPROBE
The TemProbe temperature probe is used for temperature measurements. The TemProbe may be plugged
directly into the temperature input jack on the back of the meter. Since this receptacle is keyed, the plug of the
TemProbe sensor must be correctly aligned for proper insertion. The release button on the side of the
TemProbe must be pressed to disconnect the TemProbe from the meter.
After turning the meter on, press the MODE key until / F: READ is displayed. Then, using the retractile cord if
necessary, place the TemProbe sensor in the medium to be sampled. If the TemProbe is not installed on the
meter, or if it is open circuited (defective), the display will read NO PROBE.
8.1 ADT442 TEMPROBE
Accuracy is ± 0.5 / F from 32 / F to 158 / F with a resolution of 0.1 / F using the ADT400 Series TemProbes.
Measurement range for the ADT446 TemProbe is -20 / F to 180 / F and -67.0 / F to 250.0 / F for all the other
ADT400 Series TemProbes. Meter will display OVER TEMP or UNDER TEMP if the probe is exposed to
temperatures beyond this range. The maximum recommended safe exposure range is -100 / F to 250 / F and
the probe accuracy may be effected by exposure beyond this range. Do not expose the plastic base of the
TemProbe or the extension wand to temperatures above 200 / F.
NOTICE: The use of temperature cable extenders reduces the meter reading by a non-linear degree depending
on the combination of cable type, length and TemProbe temperature. The offset correction must be determined
by comparing readings taken with and without the extender cables at the temperature(s) to be measured.
8.2 AIRDATA MULTITEMP
The MT-440K MultiTemp comes as a unit with six insertion probes, two surface probes, one eight-position
switch, and a padded carrying case. The measuring capability of the MultiTemp combines with the memory
function of the AirData Multimeter to store up to 100 temperature readings along with the sequence tag for each
reading. Each temperature reading may be entered into memory in two seconds or less. A full set of readings
may be entered into memory in about 15 seconds. Plug the single cord on the bottom edge of the MultiTemp
into the temperature input jack on the back of the AirData Multimeter. Up to eight temperature probes (each with
a 12' cord) can be connected into the eight small, numbered temperature input jacks on the top edge of the
switch box. The jack numbers correspond to the eight switch point numbers surrounding the switch.
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 under 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 switch position #2 and take
a reading for temperature jack #2. Continue for as many of the eight temperature jacks as needed.
The individual reading storage function may also be used with the MultiTemp. Set the meter for the individual
storage function. 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.
The automatic reading function may be used with the MultiTemp. Set the meter for automatic readings and take
as many readings as needed for any of the switch positions. Changing switch positions during the actual
reading process will cause false readings.
The individual and automatic storage functions may also be used with the MultiTemp. Set the meter for the
individual storage or automatic reading storage functions as needed. Take as many readings as needed for