RKI Instruments GD-70D Series - Manual (Page 63)

8 Maintenance 8-1. Maintenance intervals and items
- 63 - GD-70D
<About Maintenance Services>
• We provide services on regular maintenance including span adjustment, adjustment 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. Please contact our sales department for more information.
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
(uninterruptible power system).)
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 (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.
Inspects the alarm circuit by using the alarm test function.
• Checks the alarm lamps. (Checks each activation of ALM1 and ALM2.)
Alarm Test :
• Checks the external alarm. (Checks the activation of the external alarm, such as a buzzer.)
Span adjustment : Performs the sensitivity calibration by using the calibration gas.
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.)
• Check the alarm lamps. (Check each activation of ALM1 and ALM2.)
Gas Alarm
Check :
• Check the external alarm. (Check the activation of external alarms, such as a buzzer and reset
signal.)
Cleaning and
repair of the
detector (visual
diagnosis) : If you find dust or damage on surface, cover, or internal parts of the detector, clean and repair
such parts of the detector.
Replace parts which are cracked or damaged.
Detector
Operation Check : Uses the keys to check the operation of functions and parameters.
Replacement of
Worn Parts : Replaces worn parts, such as a sensor, filter and pump.