Riken Keiki GD-1DOXi, Operating Manual

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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 detector, please use
our maintenance service.

The followings are typical maintenance services. For more information, please contact RIKEN
KEIKI.
Main Services
Power Supply
Check : Checks the power supply voltage.
Verifies that the power lamp lights up.
(Verifies that relevant points can be identified on the system.)
(When a UPS (uninterruptible power system) is used, checks the operation with the UPS.)
Concentration
Display Check : Verifies that the concentration display value is zero (or 20.9 vol% on the oxygen deficiency
meter) by using the zero gas.
Performs the zero adjustment (fresh air adjustment) if the reading is incorrect.
Alarm Test : Inspects the alarm circuit by using the alarm test function.

Checks the alarm lamps. (Checks ALM1 activation.)

Checks the external alarm. (Checks the activation of the external alarm, such as a
buzzer.)
Span
Adjustment : Performs the span adjustment by using the calibration gas.
Gas Alarm
Check : Checks the gas alarm by using the calibration gas.

Checks the alarm. (Checks triggering of alarm when the alarm setpoint is reached.)

Checks the delay time. (Checks time to delay until the alarm is triggered.)

Checks the alarm lamps. (Checks ALM1 activation.)

Checks the external alarm. (Checks the activation of external alarms, such as a
buzzer and reset signal.)
Cleaning and
Repair of
Device
(Visual
Diagnosis) : Checks dust or damage on surface, cover or internal parts of the detector, cleans and
repairs such parts of the detector.
Replaces parts which are cracked or damaged.
Device
Operation
Check : Uses the keys to check the operation of functions and parameters.
Replacement
of Consumable
Parts : Replaces consumable parts, such as a sensor, filter and pump.