RKI Instruments GX-3R User Manual

8 • Chapter 1: Introduction GX-3R Operator’s Manual
Specifications
Table 1: Standard Sensor Specifications/Alarm Points
Combustible Gas,
Methane (CH
4
)
Calibration Standard*
Oxygen (O
2
) Hydrogen
Sulfide (H
2
S)
Carbon
Monoxide (CO)
Detection Range 0 - 100% LEL 0 - 25% volume 0 - 100.0 ppm 0 - 500 ppm
Service Range n/a 25.1 - 40% volume 100.1 - 200.0 ppm 501 - 2,000 ppm
Reading Increment 1% LEL 0.1% volume 0.1 ppm 1 ppm
Warning
Factory Setting
10% LEL 19.5% volume,
decreasing
5.0 ppm 25 ppm
Alarm
Factory Setting
25% LEL 18.0% volume,
decreasing
30.0 ppm 50 ppm
Alarm H
Factory Setting
50% LEL 23.5% volume,
increasing
100.0 ppm 1200 ppm
STEL Alarm n/a n/a 5.0 ppm 200 ppm
TWA Alarm n/a n/a 1.0 ppm 25 ppm
* The GX-3R is also available set up for general hydrocarbons and calibrated to a combustible gas other than methane, such as
isobutane. Consult RKI Instruments, Inc. for further information.
Table 2: GX-3R Specifications
Sampling
Method
Diffusion
Response Time T90 within 30 seconds
Display Graphics LCD Display
Environmental
Conditions
• 2000 meter maximum altitude
• Operating pressure: 80 - 120 kPa (80 - 100 kPa for explosion proof)
• Pollution degree 2
•IP 66/68
Operating
Temperature &
Humidity
Continuous environment: -20°C to 50
°
C/Below 90% RH
Temporary environment (up to 15 minutes): -40°C to 60
°
C/Below 95% RH
Indication
Accuracy for
Detection
Range
Combustible Gas, Catalytic Type Sensor
• Continuous environment (-20°C to 50
°
C): ± 5% of reading or ± 2% LEL (whichever is greater)
• Temporary environment (-40°C to -21°C and 51°C to 60°C): ± 10% LEL
Oxygen
• ± 0.5% O
2
Hydrogen Sulfide
• ± 5% of reading or ± 2 ppm H
2
S (whichever is greater)
Carbon Monoxide
• ± 5% of reading or ± 5 ppm CO (whichever is greater)

RKI Instruments GX-3R Specifications

General

Brand	RKI Instruments
Model	GX-3R
Category	Measuring Instruments
Language	English