RKI Instruments GX-8000 - Calibration Mode; Preparing for Calibration

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7
Calibration Mode
Calibrate sensors using a calibration gas at least once every six months. A calibration consists of a zero
adjustment and a span adjustment.
Calibration requires a demand flow regulator, calibration tubing, and calibration gas.
To enter Calibration Mode, while the instrument is in normal operation, press and hold the 
button then press and hold the DISPLAY button. Release both buttons when you hear a beep.
Calibration Mode’s menu items are shown below.
Item
LCD Display
Details
Fresh air adjustment
AIR CAL
Perform the fresh air adjustment.
Zero adjustment for
high-concentration
combustible gases
VOLZ.CAL
Perform the zero adjustment for
high-concentration combustible
gas sensor.
Simultaneous span
adjustment for all channels
AUTO CAL
Perform the span adjustment
simultaneously for all channels.
Span adjustment for each
channel
ONE CAL
Perform the span adjustment for
each channel.
Bump test
BUMP
Perform the bump test.
Exit calibration mode
NORMAL
Exit the calibration mode and
return to the detection mode.
7-1. Preparing for Calibration
Required equipment/material
Zero adjustment gas (100% N2) for high-concentration combustible gases
Span adjustment gas (NOTE: Calibration gas for the high concentration combustible gas sensor must be in a
balance of N2.)
Demand flow regulator
Calibration tubing
Stopwatch
Connection
Connect the equipment as shown below to perform a calibration.
Gas
sampling
bag
Gas sampling probe
(with a tube)
GX-8000
main unit
GAS IN
GAS OUT
(Open)
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.
Demand flow
regulator
screwed into gas
cylinder