TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 9 06/04/24 Thomson Technology
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UTIL and GEN NORMAL Output relay energizes when the generator
supply and utility supply are both energized and
are within programmed voltage, frequency and
phase balance limits on all phases.
7.6. VOLTAGE SENSING CALIBRATION
The TSC 800 software program provides voltage-sensing calibration for the utility, generator
and load sensors. All voltage-sensing circuits are factory calibrated to specific voltage levels
prior to shipment of the transfer switch. Recalibration in the field is rare and in most cases
only the Span Calibration needs minor adjustment. Zero calibration should only be
undertaken by qualified personnel due to the nature of the requirements to achieve proper
zeroing, factory zero calibration should provide accurate readings with no adjustments
required. Zero calibration is only required on first time setup of new software where zero
correction factors are unknown. Using the original correction factors determined at the factory
as noted on the supplied Program Data Sheets can be reapplied as these values are
associated to sensing resistor error factors of the TSC 800 circuit board (not a software
offset).
Should field calibration of any voltage-sensing circuitry be required, the following procedure
may be used.
WARNING
Voltage sensing circuits are capable of lethal voltages while
energized. Standard safety procedures should be followed and
be performed by qualified personnel only. Failure to do so may
cause personnel injury and/or death.
7.6.1. GENERAL
7.6.1.1. To access the TSC 800’s software programming loop for
programming, the program menu must be selected, the Yes prompt entered
and the Read/Write Security Mode password number (or higher) must be
entered.
7.6.1.2. Once the programming loop has been accessed, scroll to the voltage
calibration screens as shown below.
UTIL AB
ZERO
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