RKI Instruments GD-70D Series User Manual

GD-70D - 86 -
10
Maintenance
This is a critical instrument for incident prevention and safety.
To maintain the performance of the detector and improve its reliability, perform regular maintenance.
NOTE
To use the pyrolyzer unit (PLU-70), also refer to the individual operating manual.
10-1 Maintenance intervals and items
• Daily maintenance: perform maintenance before beginning to work.
• Monthly maintenance: perform maintenance on the alarm circuit (alarm test) once a month.
• Regular maintenance: perform maintenance once every six months.
Task
Description
Daily
Monthly
Biannually
Power supply
check
Verify that the power lamp lights up.
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Concentration
display check
Verify that the gas reading is zero (or
20.9 vol% for oxygen). If the reading is
not zero (or 20.9 vol%), perform a zero
adjustment.
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Flow rate
check
See the flow rate indicator to check for
abnormalities.
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Filter check
Check the dust filter for dust or clogging.
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Alarm test
Inspect the alarm circuit by using the
alarm test function.
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Span
adjustment
Perform a span adjustment using
calibration gas.
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Gas alarm
check
Check alarm operation using calibration
gas.
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10-2 Calibration Overview
Calibration instructions depend on the GD-70D you are calibrating. The table below will tell you what
calibration instructions to use based on your GD-70D’s detection gas and range.
Detection Gas
Range
Calibration Instructions
AsH3 (Arsine) 0 - 0.20 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
B2H6 (Diborane) 0 - 0.30 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
BCl3 (Boron trichloride) 0 - 15.0 ppm Calibrating with a Gas Bag (Calibrating with HCl) on page 99

RKI Instruments GD-70D Series Specifications

General

Brand	RKI Instruments
Model	GD-70D Series
Category	Gas Detectors
Language	English