Author – D. Rehe Feb 2020
(MV)
- Meter Output of Average Power (1mA for moving Coil Ammeter)
(PH)
- Phase Loss Output
(PLF) - Partial Load Failure
(PW)
- Power Limit
(T)
- Thermal Overload Protection
For detailed descriptions please refer the
F330 installation and commissioning manual
.
Various "Specials" (SP) versions exist with customised functions and in many cases very
minor changes to suit specific customer applications. See here for detailed of most SP
versions which have been created to date.
Calibration Procedure
Note:
Before beginning please ensure you have at least 200W load connected, can
be incandescent light bulbs, or preferably the heating/welding element you intend to use.
This ensures that you will have enough load to sink the output. Otherwise it will not be
possible to calibrate the controller.
Note:
You will need to remove the perspex cover to access the PCB for these
procedures.
Note:
Leakage of Thyristor (SCR) Semiconductors
Note there will always be some leakage current from the Thyristor (SCR)
Semiconductors. Generally, in the the low mA range, or for older devices this can
increase as they approach failure, several Amps in the worst cases. What this means
is there will always be a voltage present even when the enable of the controller is not
connected and the controller is effectively turned off. To prevent leakage in off state you
need secondary isolation via contactor or manual isolator to disconnect the circuit fully.
This is particularly important when the user needs to enter or touch the heating chamber
in between usage.
For all F330 controllers except those fitted with
CC,CCE option
1.A Bias(Zero) Adjustment
Set GAIN potentiometer(POT) fully anti-clockwise
Purchase a Current Clamp Meter similar as these Clamp Meters.
300 Amp True RMS
Clamp Meter.
Or for additional power quality features you can use this
1000 Amp True
RMS Clamp Power Meter
to clamp test the line current for each phase. We recommend
the standard Current Clamp for most applications as it comes with an impedance test
functions which is handy to verify failed SCR's or diodes by measuring Anode to
Cathode and Gate to Cathode for short circuits or low impedance.
See our Diode SCR
Testing Blog for the complete test procedure.
If you do not have a clamp meter you can
also measure the L1-L2, L2-L3, L3-L1 voltages.
Note:
Bias Adjustment can be adjusted from -20% to +20%
