2.2.4 OPERATION IN HARSH WEATHER
Characters on the display will form at a slower rate in temperatures below –10 °C.
The survey meter automatically compensates for this delay by sensing temperatures
below –10 °C. and reducing the display refresh time from every two seconds to
every five seconds. Operation of the set is normal otherwise.
2.2.5 EXTERNAL PROBE OPERATION
External probes for Alpha, Beta, Gamma, X-ray, and Neutron monitoring are
available. Each external probe is configured such that during power-up of the survey
meter, the type of probe is recognized electronically by the survey meter. The
ADM300 provides power to operate the probe.
External probes are connected to the survey meter through the 7-pin connector on
the back panel while the ADM300 is turned OFF.
The survey meter must be turned OFF before connecting the external probe to the
survey meter. After connection, when the survey meter is turned ON, the meter
automatically gets all the necessary configuration and calibration data from the
probe. Since each probe contains its own calibration information, any probe can be
used with any ADM300 and maintain its calibration.
The up arrow (↑) INC button is used to switch the rate display to other available
units. Note: Rate Alarm and other functions are not available for all probes.
Note: When an external probe is attached, the internal detectors are de-activated; the
accumulation of dose is suspended; and the alarm set points are inactive. The "-002"
ADM300 version allows monitoring of the internal GIVI tube dose rate.
2.2.5.1 ALPHA PROBE, AP100A
1. With the survey meter turned OFF, connect the probe cable to the 7-pin
connector on the probe and the other end of the cable to the ADM300 7-pin
connector.
2. Turn the survey meter power ON. The unit displays "Please Wait" then
"ALPHA PROBE" and units of measurement appear. The unit automatically
begins to measure Alpha radiation.
Note: If the unit does not indicate probe is attached or if a light leak in the Mylar
window is suspected, refer to Chapter 3, Operator Maintenance, for trouble
shooting procedures.
3. To monitor Alpha radiation remove the protective cover, place the probe
window toward the contamination source.
28
To Next Page
