Temptek VETERAN LS Series, Instruction Manual

Page: 51 / 80

Temperature Control Units : With ‘LS’ Series Instrument
Page: 51
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
leakage. Install the capillary tube and resume operations.
5.8 INSTRUMENT SERVICE
A. The instrument controller is a
microprocessor based instrument
designed to cycle the heater and
PVT
TM
solenoid cooling valve to
maintain process temperature at
setpoint (figure 5.8A) .
B. The instrument is not a field
serviceable component. If the
instrument is determined to be in
need of repair, the operator must
remove the assembly and return
it to the factory for repair.
C. To service the instrument, take the following steps:
1. Disengage process operations according to the procedure
outlined in section 3.4. The operator must be certain all
system pressure is relieved and the unit’s pressure gauges
read “0”.
2. Disengage main power supply and verify the Power light on
the display is “off”.
3. Remove the thermoformed front panel and set aside. The
panel is attached to the stainless steel cabinet by 4 small
screws.
4. Open the hinged electrical cabinet panel cover. The panel
is opened by removing four small screws.
5. The instrument is
mounted on the electrical
cabinet panel cover. The
instrument is secured
by four mounting bolts.
A series of electrical
connections link the
instrument to the
mechanical components of
the unit (Figure 5.8B).
5. Remove the large molex
connector.
6. Remove the ground terminals.
7. Remove the sensor plug.
Sentra VE instrument
Figure 5.8A
Connections
Figure 5.8B