Riken Keiki PT2-169, Operating Manual

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7 Maintenance 7-1. Maintenance intervals and items
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SD-1DGH-AS
<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.
Flow Rate Check : Checks the flow rate indicator to find abnormalities.
Checks the flow rate by using an external flow meter to verify the
correctness of the flow rate indicator on the detector. If the flow rate is
incorrect, performs the flow rate adjustment.
Filter Check : Checks the dust filter for dust or clogging.
Replaces a dirty or clogged dust filter.
Alarm Test : Inspects the alarm circuit by using the alarm test function.

Checks the alarm lamps. (Checks each activation of ALM1 and ALM2.)

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 the alarm activation when the alarm
setpoint is reached.)

Checks the delay time. (Checks time to delay until the alarm is
triggered.)

Checks the alarm lamps. (Checks each activation of ALM1 and ALM2.)

Checks the external alarm. (Checks the activation of external alarms,
such as a buzzer and reset signal.)
Cleaning and Repair of Detector
(visual diagnosis) : Checks dust or damage on surface, cover, or internal parts of the detector,
clean and repair such parts of the detector.
Replaces parts which are cracked or damaged.
Detector 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.