New Cosmos Electric KS-7D, Instruction Manual

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8. Maintenance
Daily checks are carried out by the user, while monthly and annual inspections are performed by the
user, New Cosmos or its authorized representative.
8-1. Inspection Contents and Frequency
*1: Regardless of the battery level, the first battery replacement should be done within 3 years from the purchase
date. Succeeding replacements should be done every 3 years.
*2: Perform a zero adjustment in clean air that is free from target gas or interfering gases.
*3: The first battery replacement should be done within 3 years from the purchase date. Succeeding replacements
should be done every 3 years. Contact your New Cosmos representative for sensor replacement (fees apply).
1) Concentration Display
▪
Check that the CO concentration is displayed on the LCD and that the detector operates
properly.
2) Backup Battery Level
▪
Check the backup battery level on the LCD. If the low battery icon appears (indicating
70 hours or less of operation), then battery replacement is recommended.
▪
The unit can continuously operate for about 350 hours with a new backup battery (at 20°C,
with no alarm activation and backlight being off).
Check items Start-up
Expansion
or
relocation
Periodic Inspection
Daily
check
Monthly Annually
1) Concentration display V V V
2) Backup battery level V V V
*1
V
3) Alarm test V V V
4) Zero adjustment
*2
V V V
5) Span adjustment (gas calibration) V
6) Sensor replacement
V
*3
Every 3 years
Important Notice for Maintenance
In order to ensure the reliability of the gas detector, it is vital to perform periodic span
adjustment on the gas sensor. It is highly recommended that a maintenance contract with a
local New Cosmos representative be made for the performance of scheduled sensor
adjustment and replacement.
▪
Backup is not possible while the empty battery alert icon is flashing. A low
battery does not affect the detector
’s operation, but replace the battery or remove
it from the unit in order to prevent possible battery leakage.
▪
If a gas alarm occurred while the backup battery was being used, a significant
amount of battery was consumed. Battery replacement is recommended.
▪
Even though the backup battery was unused, replace it every 3 years to prevent
possible battery leakage. (Replace the clock battery every 10 years regardless of
its battery level.)
▪
Refer to 8-2.
“Sensor/Backup Battery/Clock Battery Replacement” for battery
replacement procedure.
NOTE