6 Maintenance
6-1. Maintenance intervals and items
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<About Maintenance Services>
We provide services on regular maintenance including span adjustment, other adjustments and
maintenance.
To make the calibration gas, dedicated tools, such as a gas cylinder of the specified concentration
and gas sampling bag must be used.
Our qualified service engineers have expertise and knowledge on the dedicated tools used for
services, along with other products. To maintain the safety operation of the unit, please use our
maintenance service.
Typical maintenance services are listed as follows. Please contact RIKEN KEIKI for more
information.
Main services
Power supply
check
: Check the power supply voltage.
Status display
check
: Check that the status indicates normal measurement state.
Concentration
display check
Verify that the concentration display value is zero by using the zero gas.
Perform zero adjustment if the display is incorrect.
External alarm
test*
: Inspect the alarm circuit by using the alarm test function.
Check the alarm lamps. (Check the activation.)
Check the external alarm. (Check the activation of the external alarm, such as
a buzzer.)
Span adjustment
: Perform the span adjustment by using the calibration gas.
Gas alarm check*
: Check the gas alarm by using the calibration gas.
Check the alarm. (Check triggering of alarm when the alarm setpoint is
reached.)
Check the delay time. (Check time to delay until the alarm is triggered.)
Check the external alarm. (Check the activation of external alarms, such as a
buzzer and reset signal.)
Cleaning and
repair of the unit
(visual diagnosis)
: Check dust or damage on the surface, cover or internal parts of the unit, and clean
or repair such parts as needed.
Replace parts which are cracked or damaged.
Unit operation
check
: Use the keys to check the operation of functions, parameters, etc.
Replacement of
consumable parts
: Replace consumable parts, such as a sensor and filter.
* Check and adjustment are performed at the indicator/alarm unit side.
