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32 CHAPTER 6. FAULT DETECTION
6.1.2 Detector Over Range
If the detector is exposed to high levels of radiation or has an internal malfunction that
causes it to count beyond its count rate ability or dead time correction causes a math er-
ror, the unit flashes "or." The user should ensure whether a high radiation filed, internal
malfunction, or invalid settings are causing this fault by observing the instrument’s behavior
in a known radiation field.
Figure 6.2: Fault - Over Range.
6.1.3 Detector Overload
If a current overload threshold is enabled, the instrument can detect when there are some
forms of detector failure, a cable failure, or a high level of radiation. In this event, the unit
will flash "oL."
Figure 6.3: Fault - Overload.
6.1.4 Calibration Expiration
If the calibration expiration lockout is enabled, the instrument will flash "CAL" when cali-
bration is past due.
ò
DIP switch must be enabled. See Chapter 8, Calibration Lockout on page 56 for
more information.
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