Thermon TraceNet TCM 18 - Manual (Page 47)

PROG plus LOW
TEMP ALARM
1
This first display screen indicates the heat tracing
circuit number selected. Using the UP or DOWN arrow
select the desired circuit number or ALL and press
ENTER. The flashing cursor moves to the present low
temperature alarm value and allows the programming
of the alarm set points by using the UP or DOWN key.
Press the ENTER key to accept the new values.
Low temperature alarm setting range limits are gen-
erally -200
◦ F to 1112 ◦ F (-129 ◦ C to 600 ◦ C). However,
the low temperature alarm setting also cannot be set
higher than the temperature control set point (maintain
temperature) value.
Press the PROG key at any point to exit from this se-
quence. If left in the program mode, the TCM18 will af-
ter a short wait automatically return to the SCAN mode.
PROG plus LOW
TEMP ALARM
2
A new display screen appears which indicates the LOW
TEMP SEEN value which is the lowest temperature
that has been measured on the designated RTD(s).
The flashing cursor moves to the RESET and allows
the operate to erase the restored historical value on
the designated RTD(s) by selecting the “N” for a no
answer or by using the UP or DOWN arrow keys to
change to “Y” for a yes answer.
Where the “ALL” circuits option has been selected in
this programming sequence, the display screen will not
show the present lowest temperature seen values of all
heat tracing circuits on this TCM18 but will reset ALL
of the Lowest Temperature Seen values to the present
reading values without further review.
In the unlikely event of an RTD fault where the present
reading is out of normal range, the TCM18 will set
the new Lowest Temperature Seen to an extreme high
value such that as soon as the RTD is repaired, the
new lowest temperature seen will replace the abnormal
value.
43 PN 50316_0514