TM 10-8145-222-23
MAINTAINER MAINTENANCE
TEMPERATURE CHART RECORDER
TEST, REPLACE
INITIAL SETUP:
Tools and Special Tools
References
Service Refrigeration Ordnance
TM 10-8415-222-10
Tool Kit (WP 0096, Table 2, Item 6)
TM 10-8415-222-10
Materials/Parts
TM 10-8145-222-23P
Setup Charts CCW (WP 0097, Item 14)
Equipment Condition
Personnel Required
MTRCS set up and operating (TM 10-8415-222-10)
Utilities Equipment Repairer
TEST
The Temperature Chart Recorder can be completely tested using a simple check of the green LED indicator (Figure 1,
Item 1) on the unit. Depending on the condition of the light, certain requirements exist for the unit. A steady green
LED, with cartridge pens operating within the chart range, indicates that the temperature chart recorder is functioning
normally.
Using a combination of green LED indication and pen position, the temperature chart recorder operating conditions
can be tested. The following LED indications shown in Table 1 indicate the temperature chart recorder operating
condition.
Table 1. Temperature Chart Recorder LED Test States.
LED
Pens
Meaning
Remedy
Steady ON
Within chart range
Normal operation
None required
Steady ON
Above 100% outer ring
Unit operating in chart
Press and release
change mode
CHART CHANGE key
(3) to return unit to
normal operating mode.
Flashing rapidly
At 0% or 100% outer or
Sensors are in a break
Check or replace
inner range
condition, or pen inputs are
sensor; validate sensor
out of range above +90 or
setup (WP 0049).
below -10
Steady OFF
Not Applicable
No power to unit
Check for power at
power terminals at
control panel.
END OF TASK