Thermon TraceNet TCM 18 - Manual (Page 70)

Damaged, open, or wet thermal insulation
does not allow the heat provided to hold
the desired temperature. Repair damage to insulation.
Wrong insulation size, type, or thickness
on all of circuit being traced. Measure circumference of insulation, di-
vide by π, and compare to insulation diam-
eter charts for proper over sizing. Check
insulation type and thickness against de-
sign specification. Replace insulation or
review system design for alternate oper-
ating possibilities which involve more heat
output.
Wrong insulation size, type, or thickness
on part of circuit being traced. The insulation system should be as spec-
ified in the design for the entire circuit be-
ing traced. Having a high heat loss on one
part of the circuit and a lower heat loss
insulation on the other part of the circuit
(perhaps where the sensor is) will result
in the not so well insulated line being too
cold. Redo the insulation to assure unifor-
mity and consistency.
Improperly located RTD temperature sen-
sor. Is RTD sensor next to pipe support, equip-
ment, or other heat sink? Move RTD sen-
sor to location more representative of the
majority of the piping.
Improperly installed RTD temperature
sensor or RTD temperature probe. Permanent RTD temperature sensors are
most accurate when installed along the
pipe or equipment with at least a foot of
probe and sensor wire running along the
pipe before exiting through the insulation.
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