Thermon TraceNet TCM 18 - Manual (Page 56)

PROG plus
CONTROL BAND This sequence allows the programmer to select the
type of ambient control desired on Circuit 1. The flash-
ing cursor again requests the selection of the circuit
number. Press the UP or DOWN arrow key to select
Circuit 1. Press the ENTER key. The cursor moves
to the CONTROL BAND line. Use the UP or DOWN
key to select the Heater On to Heater Off differential
(when using an ON-OFF or SOFT START, with power
clamping, control mode). When using a proportional
control mode, the Heater On to Heater Off differential
determines the 100% power to 20% and OFF power
differential. Note that the TCM18 allows a wide band
control differential of as high as 320
◦ F or 177 ◦ C to be
entered. After selecting the differential, press the EN-
TER key. The cursor then moves to the Control Type
line. Use the UP or DOWN key to select from the op-
tions of ON/OFF, SOFT START, or PROPORTIONAL.
Having selected the desired option, press the ENTER
key. Note that ON-OFF control is a valid option for both
panels with solid state relay power switching and me-
chanical relay power switching. The selection of SOFT
START and PROPORTIONAL can only be used with
solid state power switching relays.
PROG plus
HEATER
ENABLE and
PROG plus
CONTROL BAND Repeat the first two steps in this list as needed to add
additional pipe sensed and ambient sensed RTD as-
signments to the remainder of the TCM18 circuits.
PN 50316_0514 52