Vivax Metrotech vLocDM, User Handbook Manual

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Other causes of overvoltage alarms are:
• Pipeline in very good condition (Small high impedance faults will require higher voltages to achieve the
requested current)
• Poor anode bed (Poor anode beds will require a high voltage drop across them to create the requested current)
• Poor pipe connections
4.7 Alarms
4.7.1 Over Voltage
Output exceeds 100V. (Also see Output Current Select)
4.7.2 Over Temperature
The over temperature alarm will shows on the display when the temperature of the output amplifier exceeds a
predetermined level. At this temperature the unit will shut down and cannot be switched on until the unit has
cooled down.
After the unit has been cooled down, it may be necessary to place the unit in a position where the ambient
temperature is less such as shaded position. Alternatively select a lower current output.
4.7.3 Over Power
The Over Power alarm will be shown on the display when the output power rating of the transmitter is reached.
The unit will shut down until the output power is reduced.
This can be doing either:
• Reduce the output current setting
• Improve the ground and pipe connections (This may be the case where the ground used is not an anode
bed. For instance where a ground rod is used because access to a CP station is not possible.)
4 Transmitter Functions and Operations