48
Note (V3.11 and up): If the TS 1 input is not being used by the controller, the TS 1 TEMPERATURE
is not displayed.
Note: Changing the TS Type will affect the temperature reading.
4.2.3 TS 2 TEMPERATURE
Purpose: This temperature is the value that the controller is reading from the
RTD connected to
its
TS 2 input. Depending on the TS CONTROL MODE, it may be used to determine the CONTROL
TEMPERATURE
(see section 4.2.1 on page 47).
Note (V3.11 and up): If the TS 2 input is not being used by the controller, the TS 2 TEMPERATURE
is not displayed.
Note: Changing the
TS Type will affect the temperature reading.
4.2.4 LOAD CURRENT
Purpose: The
LOAD CURRENT reading indicates the average current being drawn by the heating
cable.
Note: The controller calculates the
LOAD CURRENT using the current sensed by the switch inter-
face module multiplied by the
CURRENT TURNS RATIO to yield an adjusted current value.
4.2.5 RESISTANCE
Purpose: Resistance is calculated using the average adjusted voltage reading divided by the
average adjusted current reading to yield a load resistance in ohms. If the controller’s output
switch is on but no current is present, the
RESISTANCE will read “open circuit.”
Note: If the controller’s output switch is off, the RESISTANCE will display the last resistance which
was calculated while the output switch was on.
4.2.6 GROUND FAULT CURRENT
Purpose: If the controller detects any leakage current in the output circuit, it will indicate the
level in milliamps.
Note: To minimize nuisance alarms, the controller will not report a leakage current of less than
20 mAmps.
4.2.7 VOLTAGE
Purpose: The voltage reading indicates the average circuit voltage being measured by the switch
interface.
Note: The controller calculates this parameter using the voltage sensed by the switch interface
module and multiplying it by the
VOLTAGE TURNS RATIO to yield an adjusted voltage value.
4.2.8 POWER
Purpose: Load power provides an indication of the average power being consumed by the heat
trace cable or the total 3-phase power being consumed by a balanced 3-phase star (“Y”) con-
nected load.
Notes:
• The controller calculates load power by multiplying the average adjusted voltage reading by
the average adjusted current reading.
• The controller may be set up to calculate total 3-phase power for a balanced star (“Y”) con-
nected load if the
3-PHASE POWER CALCULATION parameter is enabled. In this case, total
3-phase power is calculated using the following equation:
P
total
= √3 x I
phase
x V
line-line
Where I
phase
= the adjusted phase current being measured, and V
line-line
= the adjusted
voltage reading being measured. The
VOLTAGE and CURRENT TURNS RATIOS affect both
calculations.
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