T-3102 Technical Bulletin 3
3. Rotate the heating set point
screw CW to decrease or
CCW to increase the heating
set point. Each increment
represents a 1F
°
change.
4. To make the set point knob
indicate the new settings,
loosen the dial set screw on
the set point dials.
5. Rotate the top (heating) dial
the same number of
increments and in the same
direction as in Step 3 above.
Tighten the set screw.
6.
Replace the cover. Position
the set point knob so that the
desired heating and cooling
set points can be viewed
through the windows.
Tighten the set point knob in
place.
Temperature and Pressure
Set Point Adjustment
Note: While performing this
procedure, the temperature at the
element must be within the
operating range of the instrument.
Cooling Set Point
1. Note the temperature at the
element.
2. Turn the set point knob to the
cooling set point that matches
the temperature in Step 1.
3. Loosen and remove the set
point knob.
4. Turn the cooling output
adjusting screw to reach and
output pressure equal to the
mid spring range of the
cooling valve. Note: The
cooling output adjusting screw
is inside the post.
5. Position the set point knob so
that the temperature at the
element can be viewed
through the cooling set point
window. Tighten the set point
knob in place and turn to the
desired cooling set point.
Heating Set Point
6. With a pencil, make a mark
on the cover next to the
heating set point window.
This mark will be used later in
the procedure to reposition
the heating dial.
7. Loosen the set point knob.
Remove the set point knob
and cover. Turn the heating
adjusting screw to reach an
output equal to the mid spring
range of the heating valve.
The heating set point is now
controlling at the ambient
temperature.
8. Turn the heating adjusting
screw to the desired heating
set point. Each increment
equal 1F
°
. CW rotation
decreases the setting and
CCW rotation increases the
setting. Replace the cover.
9.
Loosen the dial set screw
and move the top (heating)
dial to the new set point. The
new set point should be
positioned where the original
set point from Step 6 was
positioned. Tighten the dial
set screw.
10. Replace the set point knob.
The new set points can now
be viewed in the windows of
the set point knob.
Operational Checkout
1.
Note the settings on the set
point knob.
2.
Turn the set point knob all
the way CW. Output
pressure should rise to within
1 PSI of supply pressure.
3.
Turn the set point knob all
the way CCW. Output
pressure should drop below
3 psig.
4.
Turn the set point knob to the
position noted in Step 1
above. Remove the test
probe.
Repair Information
If the T-3102 fails to operate
within its specifications, and
attempts to calibrate the
instrument fail, refer to
Repair Parts R-T-3102-2 for
the appropriate repair parts.
