Riken Keiki GX-3R User Manual

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7-2-7. Auto calibration gas concentration selection
This section describes how to select the calibration gas concentration for the individual sensors.
Calibration gas concentration can be set in one-digit units within the setting range.
<Calibration gas concentration setting range>
Detection target gas Sensor model Calibration gas 1 digit Lower limit Upper limit
Combustible gas (HC) NCR-6309 Isobutane (i-C
4
H
10
) 1 %LEL 5 %LEL 75 %LEL
Combustible gas (CH
4
) NCR-6309 Methane (CH
4
) 1 %LEL 5 %LEL 75 %LEL
Hydrogen sulfide (H
2
S ）
ESR-A1DP or
ESR-A13i
Hydrogen sulfide
(H
2
S ）
0.1 ppm 1.0 ppm 200.0 ppm
Oxygen (O
2
) ESR-X13P Oxygen (O
2
) 0.1 vol% 0.0 vol% 18.0 vol%
Carbon monoxide (CO)
ESR-A1DP, ESR-
A1CP, or ESR-
A13P
Carbon monoxide
(CO)
1 ppm 20 ppm 2,000 ppm
Carbon monoxide (CO) ESR-A1CP Hydrogen (H
2
) 1 ppm 25 ppm 2,000 ppm
* CO(-H
2
) calibration should be performed using single gas and not as a mixture of CO and H
2
.
* Hydrogen must be calibrated in the range from 10 °C to 30 °C.
1
Press the AIR button to select “AUTO
CAL”, then press the MODE button.
The auto calibration screen is displayed.
2
Press the AIR button to select “CAL-P”,
then press the MODE button.
3
Press the AIR button to select the
calibration gas type.
Pressing the AIR button displays the detection target
gas in sequence.
Pressing the AIR button once more
displays “ESCAPE” and returns the
display to the screen in Step 1.
4
Press the MODE button on the sensor
selection screen for changing
calibration gas concentrations.
The calibration concentration change screen is
displayed.
5
Press the AIR button to select the
calibration concentration, then press
the MODE button.
“END” appears and the display returns to the
screen shown in the step 3 returns automatically..

Riken Keiki GX-3R Specifications

General

Brand	Riken Keiki
Model	GX-3R
Category	Monitor
Language	English