Saginomiya Temperature Recorder; Figure 6-32. Partlow Mechanical Temperature Recorder - Carrier 69NT40-511-310 Operation & Service Manual

1. Mechanical Temperature
Recorder Bulb
2. Element
3. Recorder Box
4. 31 Day Clock
5. Mechanism and Platen Assembly

6.24 SAGINOMIYA TEMPERATURE RECORDER

Do not overtighten chart nut after replacing
chart.
6.24.1Battery Check
a. Open door and remove chart nut and platen.
b. Push voltage indicator test switch (item 3,
Figure 6-33). Replace battery if voltage indicator
points to the red or white zone.
6.24.2Calibration
1 One full turn with the adjustment screw
changes the indicated temperature by
approximately 5°C (9°F).
2 Overtightening of setscrew may change
set temperature.
3 Calibration should only be done when
sensor temperature is decreasing.
4 DO NOT move stylus by hand.
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Figure 6-32. Partlow Mechanical Temperature Recorder

NOTE
NOTES
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6. Set Screw
7. Pinion Shaft
8. Recorder Door
9. Stylus
10. Clock Winding Key
11. Push Rod
a. Install new chart on platen.
b. Place the recording thermometer sensing bulb in
0°C (32°F) ice-water bath. Ice-water bath is
prepared by filling an insulated container (of
sufficient size to completely immerse bulb) with ice
cubes or chipped ice, filling voids between ice with
water, and agitating until mixture reaches 0°C
(32°F) as shown by a laboratory thermometer.
c. When the ice bath temperature reaches 0°C (32°F),
as shown by the laboratory thermometer reading,
compare the temperature indicated by stylus with
temperature shown by the thermometer. Allow
sufficient time to ensure bulb has cooled to the ice
bath temperature. If the two readings do not agree
within +/-- 0.3°C (1/2°F), the recording thermometer
should be rezeroed. Do not touch stylus during the
checkout procedure.
d. If adjustment is required,
(cross-recessed head). Using a 7 mm wrench,
rotate the adjustment screw clockwise to set the
stylus 1 to 2°C (1.8 to 3.6°F) higher than desired
temperature.
e. Rotate the adjustment screw counterclockwise to
set the stylus about 0.5°C (0.9°F) higher than set
6-27
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8
9
loosen setscrew
T-296