RKI Instruments GX-8000(PT0-098) - Manual (Page 40)

6 Maintenance 6-2. Gas calibration method
GX-8000 - 40 -
<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 gas monitor, please use our
maintenance service.
• The followings are typical maintenance services. For more information, please contact RIKEN KEIKI.
Main Services
Battery Level
Check : Checks the battery level.
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 gas monitor. 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 : Checks the alarm lamp and buzzer for normal operation using the alarm test function.
Span Adjustment : Performs the span adjustment 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.) Gas Alarm Check :
• Checks the buzzer, lamp, and concentration display. (Check each activation of ALM1 and
ALM2.)
Cleaning and
Repair of Gas
Monitor
(visual diagnosis) : Checks dust or damage on surface of the gas monitor, clean and repair such parts of the gas
monitor.
Replaces parts which are cracked or damaged.
Gas Monitor
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.
6-2. Gas calibration method
Perform span adjustment of sensors using a calibration gas at least once every six months.
The span adjustment requires dedicated equipment and a calibration gas. Request RIKEN KEIKI for it.
If you perform the span adjustment for yourself, prepare these tools in advance and perform the adjustment
in accordance with the "Maintenance Manual."
CAUTION
Do not use a lighter gas to check the sensitivity of the gas monitor. A constituent of the lighter gas
may deteriorate the sensor performances.