7-6
Saginomiya (Model SKM) Recording Thermometer
Structural/Accessory Maintenance
CSR-20 & CSR-40, September 1999
d.
Then rotate the setting screw counterclockwise to
lower the recording pen reading until the pen reading
agrees with the “RET” controller display.
e.
Tighten the lock screw.
f.
Wait another 5 minutes while the unit operates on
Cool. Verify that the recording thermometer reading
is stable and agrees with the “RET” temperature in
the controller display.
g.
Press any key to unlock the controller display screen.
Power Element Assembly Replacement
The recording thermometer’s power element is field replace-
able. To replace the element assembly:
1.
Raise the stylus away from the chart. Remove the knurled
chart nut and chart.
2.
Remove the recording platen.
3.
Loosen five mounting screws that mount the capillary
holding plate and element assembly in the recorder.
Remove the power element assembly (includes recording
pen assembly).
4.
Remove the old sensing bulb and capillary from the unit.
5.
Install the new sensing bulb and capillary in the unit. The
capillary of the new thermal element may be bent, but DO
NOT bend the bulb.
6.
Install the capillary in the recorder and securely tighten
five mounting screws.
7.
Replace the recording platen, recording chart and chart
nut. Lower the recording pen.
8.
Check the calibration of the recorder. Recalibrate the
recorder if necessary.
Timer (Quartz Motor and Reducing Gear)
Replacement
The quartz motor is field replaceable. To replace the motor
and reducing gear assembly:
1.
Raise the stylus away from the chart. Remove the knurled
chart nut and chart.
2.
Remove the recording platen.
3.
Loosen the two terminal screws on the terminal board and
remove the motor wires.
4.
Loosen the five screws that mount the motor assembly in
the recorder. Remove the motor assembly.
5.
Install new motor assembly. Install an securely tighten
five mounting screws.
6.
Connect the motor wires to the terminal board. Make sure
the red positive (+) and black negative (-) wire are correct-
ly aligned.
7.
Check to see that the quartz motor is running. Look
through the inspection window and make sure the internal
flywheel on the quartz motor is revolving.
8.
Replace the recording platen, recording chart and chart
nut. Lower the recording pen.
Battery Voltage Indicator
The battery voltage indicator is field replaceable. If the indica-
tor needle oscillates when the test button is depressed, or the
needle remains in the red zone when a new battery is installed,
replace the voltage indicator assembly:
1.
Remove the knurled chart nut and chart. Remove the
recording platen.
2.
Loosen the two terminal screws on the terminal board and
remove the voltage indicator wires.
3.
Loosen the two mounting screws that mount the voltage
indicator assembly in the recorder. Remove the voltage
indicator (includes battery holder).
4.
Install a new voltage indicator. Install and securely tight-
en the two mounting screws.
5.
Connect the voltage indicator wires to the terminal board.
Make sure the red positive (+) wire and black negative (-)
wire are correctly aligned.
6.
Reinstall the battery in the battery holder (with correct
polarity). Check the voltage indicator by depressing the
test button to make sure the indicator needle is in the blue
zone. Also check to see that the quartz motor is operating
(flywheel revolving).
7.
Replace the recording platen, recording chart and chart
nut. Lower the recording pen.
