2 T-3102 Technical Bulletin
Deadband Adjustment
1.
Insert an X-200-140
hypodermic test probe with
gage into the test
connection.
2.
Be sure that the temperature
at the element is above 67F.
At this point, the cooling lid is
unseated and the heating lid
is seated. If the temperature
at the element is below 67F,
the heating lid will be
unseated and inaccurate
gage readings will result.
3.
Rotate the set point knob
counterclockwise until output
pressure remains constant at
approximately 7-1/2 psig.
Note the set point knob
readings.
4.
Loosen the set point knob.
Remove the set point knob
and cover. Rotate the
deadband pressure regulator
screw until the desired
deadband pressure is
reached. Rotate clockwise
(CW) to increase or
counterclockwise (CCW) to
decrease the setting.
60
°
rotation equals
approximately a 1 PSI
change.
5.
Replace the cover. Position
the set point knob over the
dials so that the readings
noted in Step 3 can be
viewed through the windows.
Tighten the set point knob in
place and turn the knob to
original factory setting.
Temperature Set Point
Adjustment
If the pressure settings of the
heating and cooling set point are
acceptable to the application, the
following instructions can be used
to change dial settings. If both
dial settings
and pressure
settings must be changed, refer
to instructions entitled
“Temperature and Pressure Set
Point Adjustment”.
Changing Set Points with 10F
°
Span Between Heating and
Cooling
To change set points while
maintaining a 10F
°
span between
heating and cooling, simply rotate
the set point knob CW to
decrease or CCW to increase the
set points. Both set points will
decrease or increase equally.
Changing Span Between Set
Points
1. Turn the set point dial to the
desired cooling set point.
2. Loosen the set point knob.
Remove the set point knob
and cover.
Fig. 5: T-3102 with Set Point Knob Removed
