Temperature Control Units : With ‘LS’ Series Instrument
Page: 48
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Service Department Fax: 317-885-8683
www.Temptek.com
of this manual. Restart unit operations according to section
3 of this manual.
5.6
SENSOR PROBE SERVICE
A.
Each temperature probe (figure
5.6A) is a temperature transducer.
The transducer is embedded into
a bulb well, which is threaded into
the tank. The transducer converts
the temperature of the water into a
proportional current output, which
the microprocessor controller reads,
displays, and bases it controlling
functions. The gain is automatically
calibrated within the controller
electronics, the zero adjustment
potentiometer is located on the CPU.
B.
Sensor probe errors are indicated by the Probe light on the
instrument with a Flashing Red display. When a sensor probe error
is displayed, take the following steps to correct:
1.
RECONNECTION. If the service connection of the sensor
probe becomes saturated with water. Simply unplug
the connection, shake out the water to clear the service
connection and replug. If this was the problem, the error
display should change to Solid Red which can be cleared
by pressing the Start push button. If not, continue with
replacement.
2.
REPLACEMENT. Replacement of the sensor probe
involves ceasing process operations (as outlined in
section 3.4 of this manual) and removing the defective
sensor probe. All factory supplied replacement probes are
complete with the service connection. Unit with ‘HE’ Series
instruments use two sensor probes: A “to process” and a
“from process”. The “high temperature limit” safety switch
is a part of the “to process” sensor probe. To replace any
sensor probe, follow the procedure as outlined below:
a.
Stop process operations as described in section
3.4 of this manual.
b.
Determine that all process pressure is relieved and
the unit’s pressure gauges read “0” pressure.
c.
Drain the unit by removing the pump casing drain
plug. The unit can be drained only to below the
sensor probe mount if preferred.
d.
Disconnect the sensor probe service plug.
Service connection
Figure 5.6A
Probe
Summary of Contents for VETERAN LS Series
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