Shortridge Instruments ADM-860C, Руководство по эксплуатации

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ADM-860C 04/14/08 36
8.0 TEMPERATURE MEASUREMENT
8.1 TEMPROBE
Temperature measurements are obtained using the TemProbe temperature probe. 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.
The “settling in” time required for the thermistor to stabilize at the temperature of the air being measured will vary
with the temperature differential between the TemProbe and the air, and also with the velocity of the air across
the probe. The “settling in” time is typically less than for a standard glass thermometer.
After turning the meter on, press the MODE key until TEMP is briefly displayed, followed by the units and READ.
Then, using the retractile cord if necessary, place the TemProbe sensor in the medium to be sampled. Press
the READ key to take a temperature reading. If the TemProbe is not installed on the meter, or if it is open
circuited (defective), the display will read NO PROBE.
FIGURE 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 more than one temperature cable extender may reduce the meter reading by a non-linear
degree depending on the combination of cable type, length and TemProbe temperature. This is due to the
added resistance of the additional cable(s). This effect is likely to be negligible at very low temperatures, but
may be
$
0.15 / F per additional cable extender at 154 / F. The offset correction(s) 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 with six insertion probes, two surface probes, one eight-position switch, and
a small 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 eight 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 position numbers surrounding the switch.