Riken Keiki GX-3R User Manual

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7-2. Calibration
The product can be calibrated using automatic calibration with preset gas concentrations in addition to air
calibration.
Span adjustment requires dedicated tools and a calibration gas. Contact Riken Keiki.
7-2-1. Preparation for calibration
This section describes how to calibrate the product using calibration adapter (simple type).
<Required equipment/materials>
 Calibration gas
 Gas sampling bag
 Calibration adapter (simple type) *ATEX/IECEx specification is shipped with this parts.
 Pump
<Recommended calibration gas concentrations>
Detection target gas Sensor model Calibration gas
Calibration gas
concentration
Combustible gas (HC) NCR-6309 Isobutane (i-C
4
H
10
) 50%LEL (0.9 vol%)
Combustible gas (CH
4
) NCR-6309 Methane (CH
4
) 50%LEL (2.5 vol%)
Hydrogen sulfide (H
2
S）
ESR-A1DP or ESR-
A13i
Hydrogen sulfide (H
2
S）
25.0 ppm
Oxygen (O
2
) ESR-X13P
Oxygen (O
2
)
Nitrogen diluted
12.0 %
Carbon monoxide (CO)
ESR-A1DP,
ESR-A1CP, or
ESR-A13P
Carbon monoxide (CO) 50 ppm
Carbon monoxide (CO) ESR-A1CP
Hydrogen (H
2
)
air diluted
500 ppm
* Hydrogen must be calibrated in the range 10 °C to 30 °C.
* The same applies to bump test gas.
CAUTION
 Do not use lighter gas to check the sensitivity of the product. Constituents in the lighter gas may
degrade sensor performance.

Riken Keiki GX-3R Specifications

General

Detection Gases	LEL, O2, H2S, CO
Detection Principle	Catalytic combustion (LEL), Electrochemical (O2, H2S, CO)
LEL Range	0-100% LEL
Battery	Rechargeable lithium-ion battery
Humidity Range	0 to 95% RH (non-condensing)
Device Type	Multi-gas monitor
Target Gases	Oxygen, Hydrogen Sulfide, Carbon Monoxide
O2 Range	0-30% vol
H2S Range	0 to 100 ppm
Alarm Set Points	Adjustable
Alarm Method	Audible, visual, and vibration alarms
Display	LCD with backlight
Operating Temperature	-20 to +50°C
Protection degree	IP66
CO Range	0-500 ppm