Fluke Biomedical 956A-201-M2 - Manual (Page 33)

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The calibration mode can also be entered with the UDR in the check source mode of operation. Move the
rotary switch to position 8 and press the check source button. While holding down the check source
button, press the ENTER button. This will turn the Check Source LED on, actuate the check source relay,
and lock the Check Source function on. The Check Source button may now be released and the Check
Source will remain on. Pressing the enter button again will start the calibration. The check source light
will remain on, indicating that the check source relay is energized. The check source condition will clear
when the calibrate mode is exited.
In Calibrate mode, the analog outputs are frozen at their last value, prior to entering the Calibrate mode.
In Calibrate mode, any High and Warn alarms are cleared, the Fail LED is turned on, and the Fail Safe
Alarm, Warn and Fail relays change state, to indicate the unit is not monitoring radiation.
In Calibrate mode, the bargraph display is blanked.
Trip Test Mode, 956A-201-M2
The Trip Test Mode is provided to verify operation of the output relays, status indicators, display and
analog outputs. The Trip Test Mode is entered by pressing and holding in the front panel TEST
pushbutton. The Trip Test Mode is exited by releasing the TEST pushbutton, and then pressing and
releasing the ACKNOWLEDGE pushbutton.
Pressing the TEST pushbutton will cause the Alarm, Warn and Fail
relays to change state and indicate an alarm condition. Prior to
activating the Test Mode ensure the appropriate plant personnel
are notified.
A detailed description of the operation is as follows:
TRIP TEST pushbutton depressed to initiate Trip Test Mode
• Front panel display shows 8.8.8.8.8
• KR/h, mR/h and R/h Backlights are illuminated
• Bargraph is fully illuminated, in amber
• HIGH Alarm relay changes state (de-energize)
• WARN Alarm relay changes state (de-energize)
• Aux Relay changes state (de-energize)
• Fail relay changes state (de-energize)
• High, Warn, Fail. Range, and Check Source LEDs are illuminated
• Analog Outputs are at Full Scale
TEST pushbutton Released
• Front panel display shows current value and continues to count
• mR/h backlight is illuminated
• Bargraph will display the actual count rate in Red
NOTE