INFICON Maxtek PM-700 Plating Monitor - Manual (Page 73)

PM-700 SERIES PLATING MONITOR
65
Note that it is normal for the power failure message to flash when the unit is first
turned on. Press the STOP button to clear this message.
5.2.2 Sensor Probe Failure
An "O" Fail message indicates an improper or missing signal from the oscillator
located in the Sensor Probe. The problem is most likely with the sensor crystal,
however, failures in the oscillator, cable, or sensor head can also generate this
failure message. The "O" failure message will be cleared automatically when the
monitor receives a proper signal from the sensor oscillator if the failure lasts for
less than 2 seconds. Failures of more than 2 seconds require the pressing of the
STOP button to clear.
5.2.3 Invalid Parameters
If the integrity of parameter values is lost then the C FAIL message will be flashed
when the monitor is turned on. This warns you of a possible internal failure of the
monitor. The C FAIL message can be cleared by pressing the STOP button.
The clearing of the failure message also results in resetting of all parameters
values to their defaults. If there are no other failure messages indicated then it is
possible that the monitor Lithium battery simply need to be replaced. If your
monitor still does not retain the parameter values intact (C FAIL flashes after
periods of power down) after replacement of the battery then your monitor should
be returned for service.
5.2.4 RAM Failure
In the case of a failure in the monitor's data memory, RAM, the "I" FAIL message
will be displayed. To confirm the RAM failure, cycle the AC power to the
monitor. The monitor will recheck its memory and if failed, will again display the
"I" FAIL message. If the "I" FAIL message is not displayed on power up the
second time, the problem may be intermittent. It is recommended that your
monitor be returned for service.
5.2.5 ROM Failure
In the case of a failure in the program memory, ROM, the "E" Fail message is
displayed. A ROM failure is treated in exactly the same manner as a RAM
failure. Please read the preceding section.
5.3 PROBE FAILED INDICATION
If a probe failure occurs, the red LED in the Probe Status window will be lit. If
the failed probe is the active one then the "O FAIL" message, described in Sensor
Probe Failure section on page 65, is also enunciated. Use Stop Button to clear the
failure message once the problem has been corrected. To clear an inactive probe
failed indication, after the problem has been corrected, press that probe button.
For example, if Probe B is the inactive probe and it failed. The red LED in the
Probe Status window will be lit (O FAIL message will not be enunciated). After