Device Maintenance - nvent RAYCHEM Elexant 4010i User Manual

RAYCHEM-AR-H60624-40X0iOpsManual-EN-1905
resistance values, 1 – 250% in case of high resistance values).
Trace Resistance is calculated (in Ohms) using the average adjusted voltage reading divided by the
average adjusted current reading. If the controller's output switch is on, but no current is present, the
RESISTANCE will read "N/A." See Section 5.8.4 for more details.
IMPORTANT: If the controller's output switch is off; the RESISTANCE will always display the last resis-
tance which was calculated while the output switch was last on.
3.2.2.5 Trace Power
Trace power provides an indication of the average power being consumed by the EHT circuit.
IMPORTANT: The control module calculates load power by multiplying the average adjusted voltage
reading by the average adjusted current reading. Both the VOLTAGE TURNS RATIO and the CURRENT
TURNS RATIO affect the trace power reading.
3.2.3

Device Maintenance

These parameters include internal accumulators and Maximum/Minimum records to assist with main-
tenance of the heat trace installation. These parameters can be reset at any time through the GUI or the
communications ports.
3.2.3.1 Cycle Count
This data indicates the total number of off-to-on transitions a contactor has made since the last time
the CONTACTOR CYCLE COUNTER was reset. This serves as a method to perform preventative
maintenance on the contactor according to the manufacturer's specifications. This value is written to
the controller's non-volatile memory once every 24 hours or whenever any maintenance data is reset
by the user.
IMPORTANT:
• The CONTACTOR CYCLE COUNTER is only indicated if the SWITCH CONTROL MODE is set to either
DEADBAND or PROPORTIONAL AMBIENT CONTACTOR.
• Note: Once the CONTACTOR CYCLE COUNTER reaches 999,999,999 it will stop counting until it is reset.
3.2.3.2 Hours in Use
This data is used to indicate the total hours of use of the controller since its initial operation. It may be
useful to log the amount of time a particular controller has been in operation for the purposes of
maintenance planning or reliability testing. The value of this accumulator is written to the controller's
non-volatile memory once every 24 hours or whenever any maintenance data is reset by the user.
3.2.3.3 Heater ON Time
This data is used to indicate the number of hours that the EHT output has spent in the on state.
3.2.3.4 Hours Since Reset
This data is used to indicate the number of hours that have passed since the unit was last powered on or
the maintenance data was reset.
3.2.3.5 Trace Power
This parameter indicates the power used by the EHT and includes an accumulator that records the total
power the circuit has used since the last time the reading was reset.
3.2.3.6 Device Reset
This alarm is set when the controller software starts. Possible causes include:
1. Power to unit has been interrupted.
2. A transient has caused the unit to restart.
3. An internal condition has caused the unit to restart.
3.2.3.7 Max/Min
The controller stores the Maximum and Minimum readings for the following parameters:
Temperature (Control, TS1, TS2, TS3)
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