RKI Instruments GasWatch 1 - Manual (Page 5)

GasWatch Instruction Manual (Two-Gas) Introduction • 1
Introduction
The GasWatch is a portable gas monitoring device. It is offered in single-gas and two-gas
versions. This instruction manual describes the two-gas version. The GasWatch is
compact, convenient, and offers a full range of features, including:
• detection of oxygen deficiency and carbon monoxide or hydrogen sulfide
• LCD display for complete, understandable information at a glance
• distinctive audible alarms for dangerous gas conditions and malfunctions
• designed for intrinsic safety for Class I, Groups A, B, C, and D hazardous atmospheres
• microprocessor control for reliability, ease of use, and advanced capabilities
• small size and light weight for user comfort
• wrist strap or optional arm strap for hands-free gas monitoring
WARNING: The GasWatch is designed to detect oxygen deficiency and carbon monoxide
or hydrogen sulfide, which can be life threatening. Users must follow the
instructions and warnings in this manual to assure proper and safe
operation of the GasWatch.
Specifications
Table 1: Specifications
CX-GW HX-GW
Target Gases Carbon monoxide (CO); Oxygen (O2) Hydrogen sulfide (H2S); Oxygen (O2)
Detection Range CO: 0 to 500 ppm; O2: 0 to 40.0% vol. H2S: 0 to 150.0 ppm; O2: 0 to 40.0% vol.
Alarm Point CO: 25 ppm;
O2: 19.5% vol. (dec.);23.5% vol. (inc.)
H2S: 10 ppm;
O2: 19.5% vol. (dec.);23.5% vol. (inc.)
Display Increment CO: 1 ppm; O2: 0.1% vol. H2S: 0.5 ppm; O2: 0.1% vol.
Sampling Method Diffusion Diffusion
Response Time CO: T90 in 30 sec.; O2: T90 in 20 sec. H2S: T90 in 30 sec.; O2: T90 in 20 sec.
Accuracy CO:
±
5 ppm (up to 150 ppm);
O2:
±
0.5% vol.
H2S:
±
1.5 ppm (up to 30 ppm);
O2:
±
0.5% vol.
Dimensions 3.1 in. x 3.3 in. x 1.2 in. (7.9 cm x 8.4 cm x 3.0 cm)
Weight 6 ounces (170.1 grams)
Battery life 1 720 hours
Oper. Temperature 14
°
F to 104
°
F (-10
°
C to 40
°
C)
Humidity (max.) 85% RH (non-condensing)
1 (based on continuous operation without alarms or use of back light feature)