CS200
Control Systems
48
Troubleshooting
Push Buttons Will Not Respond
Moisture may have migrated into the sealed faceplate. Call your distributor for a Material Return Authorization.
Refer to the Service and Maintenance section of this manual to obtain information regarding equipment returns.
Liquid Level Readout is Incorrect
Liquid level is determined by a 8-thermistor assembly inside the protective sensor tube. The user may adjust
the desired START FILL elevation and STOP FILL elevation for the pool of liquid nitrogen within the confines
of 5 in. (127 mm). START FILL cannot be assigned to thermistor number 1. STOP FILL cannot be assigned to
thermistor number 8. The factory installs 8-thermistor assembly at the bottom of the sensor tube, which positions
thermistor number 1 at 1 in. (25.4 mm) above the floor (i.e.; the first thermistor is offset from the floor zero
inches).
If you would like to stop the fill at a depth greater than seven inches from the floor, the sensor assembly
must physically be raised inside the sensor tube. The distance that it has been raised becomes the new
OFFSET and the controller must be notified of this offset from the floor. The factory settings are START
FILL at 3 in. (76 mm) and STOP FILL at 5 in. (127 mm), with an OFFSET of zero. The factory settings for the
LABS94K are START FILL at 6 in. (152 mm) and STOP FILL at 9 in. (228 mm), with an OFFSET of 3.
Power Failure Alarm
If power is interrupted, a log of the time and duration will be recorded. If the unit is not connected to a battery
back-up or an external alarm, no local alarm will sound unless a high temperature is detected after power is
restored. A Remote Alarm will be triggered anytime the power is interrupted.
Содержание CS200
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