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Chapter 15. PART REPLACEMENT
Replacing parts periodically is recommended as preventive maintenance, for long and productive use
of the paperless recorder.
15.1. Replacement intervals
The recommended intervals shown below are rough estimates only, based on standard conditions.
Part name
Replace after
Remarks
Power supply unit
5 years
At an ambient temperature of 25 °C
LCD 5
years*
Keypad 5
years
70,000 times Resistive load (at contact rating or less)
Relay (for mechanical
alarm output)
20,000 times Inductive load (at contact rating or less)
Lithium battery
5 years
*: This period is based on the half-life of the backlight’s brightness when the display brightness is set
at 3 (the factory setting).
Standard conditions are defined below.
Item
Conditions
Temperature
20 to 25
°
C
Humidity
20 to 80 % RH
Length of operation
8 hours/day
Environment
Free from corrosive gas.
Little dust or soot.
No excessive moisture.
Little mechanical vibration or shock.
No other negative influences on operation.
Handling Precautions
・
The degree of reduction of the LCD’s brightness differs depending on the usage conditions. The
replacement interval can be extended by using the screen saver function and by setting the brightness
control lower.
Return the recorder to the factory when part replacement is needed. Replacing parts
yourself might result in electric shock or fire.
Caution