RKI Instruments GasWatch 2 Bedienungsanleitung

www.rkiinstruments.com

GasWatch 2

Operator’s Manual

Part Number: 71-0065RK

Revision: F

Released: 2/2/11

GasWatch 2 Operator’s Manual

WARNING

Read and understand this instruction manual

before operating instrument. Improper use of the

gas monitor could result in bodily harm or death.

Periodic calibration and maintenance of the gas

monitor is essential for proper operation and cor-

rect readings. Please calibrate and maintain this

instrument regularly! Frequency of calibration

depends upon the type of use you have and the

sensor types. Typical calibration frequencies for

most applications are between 1 and 3 months,

but can be required more often or less often

based on your usage.

GasWatch 2 Operator’s Manual Warranty

Warranty RKI Instruments, Inc. warrants the GasWatch 2 sold by us to be free from

defects in materials, workmanship, and performance for a period of two

years from the date of shipment from RKI Instruments, Inc. This includes

the instrument and the original sensors. Replacement parts are warranted

for 1 year from the date of their shipment from RKI Instruments, Inc. Any

parts found defective within their warranty period will be repaired or

replaced, at our option, free of charge. This warranty does not apply to

those items which by their nature are subject to deterioration or

consumption in normal service, and which must be cleaned, repaired, or

replaced on a routine basis. Examples of such items are:

Warranty is voided by abuse including mechanical damage, alteration,

rough handling, or repair procedures not in accordance with the instruction

manual. This warranty indicates the full extent of our liability, and we are

not responsible for removal or replacement costs, local repair costs,

transportation costs, or contingent expenses incurred without our prior

approval.

THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES

AND REPRESENTATIONS, EXPRESSED OR IMPLIED, AND ALL OTHER OBLIGATIONS

OR LIABILITIES ON THE PART OF RKI INSTRUMENTS, INC. INCLUDING BUT NOT

LIMITED TO THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A

PARTICULAR PURPOSE. INNO EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE

FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND

CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO

FUNCTION OR OPERATE PROPERLY.

This warranty covers instruments and parts sold to users only by

authorized distributors, dealers, and representatives as appointed by RKI

Instruments, Inc.

We do not assume indemnification for any accident or damage caused by

the operation of this gas monitor and our warranty is limited to replacement

of parts or our complete goods.

Absorbent cartridges

Filter elements, disks, or sheets

Pump diaphragms and valves

Table of Contents GasWatch 2 Operator’s Manual

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Wristband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Sensor Cap/.Sensor Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Charcoal Filter Disk in GW-2C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

LCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Printed Circuit Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Alarm Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Buzzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Vibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Lithium Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Start Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Start-up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Performing a Fresh Air Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Turning Off the GasWatch 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Measuring Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Displaying the Peak, STEL, & TWA (GW-2C & GW-2H) . . . . . . . . . . . . . . . . . . 11

Displaying Min and Max (GW-2X). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Displaying and Setting the Alarm Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Setting the Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Setting the Span (Zero for GW-2X). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

GasWatch 2 Operator’s Manual Table of Contents

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Replacing the Lithium Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Replacing the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Replacing the Sensor Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Replacing the Charcoal Filter Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Replacing the Wristband. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Appendix A: MRI Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

WARNING: Understand manual before operating. Substitution of

components may impair intrinsic safety. To prevent

ignition of a hazardous atmosphere, batteries must only

be changed in an area known to be nonhazardous. Not

tested in oxygen enriched atmospheres (above 21%).

1 • Introduction GasWatch 2 Operator’s Manual

Introduction

Using an advanced microprocessor controlled detection system, the

GasWatch 2 Personal Single-Gas Monitor detects the presence of either

carbon monoxide (CO), hydrogen sulfide (H2S), or oxygen (O2). The

GasWatch 2’s compact size and easy-to-use design makes it ideally suited

for a wide range of applications, including sewage treatment plants,

tunnels, hazardous waste sites, petrochemical facilities, oil fields, mines,

and chemical plants. The GasWatch 2 is even small enough to be worn

comfortably on the wrist like a watch. The GasWatch 2 offers a full range of

features, including:

• Hands free gas monitoring

• Compact “watch type” design

• Fast, accurate response with digital liquid crystal display (LCD)

• Visual, audible, and vibration alarms

• Microprocessor control for reliability, ease of use, and advanced

capabilities

• Peak, STEL, and TWA indication for GW-2C & GW-2H

• Minimum and maximum indication for GW-2X

• STEL, TWA, and over range alarms

• Sensor fail alarm

• Displays current time

• Over 3,000 hours of operation from 1 battery

• CSA classified for Class I, Division I, Groups A, B, C, and D hazardous

atmospheres

WARNING: The GasWatch 2 detects carbon monoxide, hydrogen

sulfide, or oxygen deficiency and elevated levels of

oxygen, all of which can be dangerous or life threatening.

When using the GasWatch 2, you must follow the

instructions and warnings in this manual to assure

proper and safe operation of the unit and to minimize the

risk of personal injury. Be sure to maintain and calibrate

the GasWatch 2 as described in this manual.

GasWatch 2 Operator’s Manual Specifications • 2

Specifications

Table 1: GasWatch 2 Specifications

GW-2C GW-2H GW-2X

Target Gas Carbon Monoxide

(CO) Hydrogen Sulfide

(H2S) Oxygen

(O2)

Detection Range 0 to 500 ppm 0 to 100.0 ppm 0 to 40.0% vol.

Display Increment 1 ppm 0.5 ppm 0.1% vol.

Detection

Principle Electro Chemical Electro Chemical Galvanic Cell

Alarm Points Low 25 ppm

High 50 ppm

TWA 25 ppm

STEL 200 ppm

Low 10.0 ppm

High 30.0 ppm

TWA 10.0 ppm

STEL 15.0 ppm

Low 19.5% vol.

(decreasing)

High 23.5% vol.

(increasing)

Sampling Method Diffusion Diffusion Diffusion

Response Time T90 in 30 seconds T90 in 30 seconds T90 in 20 seconds

Accuracy ±5% of reading or

± 5 ppm CO

(whichever is

greater)

±5% of reading or

± 2 ppm H2S

(whichever is

greater)

± 0.5% O2

Safety/Regulatory

C US

186718

CSA classified, “C/US”, as Intrinsically Safe. Exia. Class I,

Groups A, B, C, & D. Class I, Zone 0, Group IIC.

Temperature Code T4.

Power Two AAA size Alkaline Batteries Standard, Duracell MN2400

or PC2400, Eveready Energizer E92 or EN92

Continuous

Operating Hours Approximately 3,000 Hours With No alarms or Backlighing

Case High-impact Plastic, Dust Proof and Weather Resistant

Standard

Accessory Wristband

3 • Specifications GasWatch 2 Operator’s Manual

Optional

Accessories • Belt Clip

• Hard Hat Clip

• Lapel Clip

Dimensions and

Weight Dimensions: 2.5 (H), 1.7 (W), 0.9 (D) inches

Weight: 2 oz.

OperatingTemp.&

Humidity -10°C - 40°C, below 85% RH (non condensing)

Table 1: GasWatch 2 Specifications

GW-2C GW-2H GW-2X

GasWatch 2 Operator’s Manual Description • 4

Description

This section describes the components of the GasWatch 2. These

components include the GasWatch 2’s case, wristband, sensor cap and

sensor cover, charcoal filter disk (in the GW-2C), sensor, LCD, control

buttons, printed circuit boards, alarm lights, buzzer, vibrator, and lithium

battery.

Sensor Diffusion

Port

LCD Display Window

Alarm LED Lens

Buzzer Opening

Wristband

Control Buttons

Sensor Cap

AIR

POWER

MODE

Figure 1:Components of the GasWatch 2

5 • Description GasWatch 2 Operator’s Manual

Case

The GasWatch 2’s sturdy, high-impact plastic case is suitable for use in

many environmental conditions, indoors and out. The unit is dust proof and

weather resistant. The case has two halves, the top case and the bottom

case. They are held together by four screws in the bottom case. The case

is a different color depending on the model. The GW-2C for CO is red, the

GW-2H for H2S is orange, and the GW-2X for oxygen is blue.

The digital LCD is visible through the top case. It displays gas

concentrations, battery level, time, and other readings including TWA,

STEL, and peak gas levels. Below the LCD are two black control buttons.

The button on the left is labeled POWER/MODE. The button on the right is

labeled AIR.

To the left of the LCD is the buzzer, which is located inside the unit. To the

right of the LCD is the sensor cap which retains the sensor. Above the LCD

is a frosted lens through which the alarm lights are visible.

A battery cover is located on the bottom case and is held in place by two

screws. The wristband attaches to the bottom case.

Wristband

The GasWatch 2 comes with a wristband as a standard accessory so the

unit may be worn as a watch and allow hands-free gas monitoring. The

wristband is held in place with the same type of spring bars that are used in

a watch. The spring bars are protected by hollow tubes which fit into the

wristband. Optional accessories are available from RKI Instruments, Inc.

that can be used in place of the wristband such as a belt clip.

Sensor Cap/Sensor Cover

The sensor cap snaps onto the right side of the case and retains the

sensor. It also retains the sensor cover which is a round hydrophobic disk

membrane which protects the sensor from dirt and weather. A gasket

installed on the sensor seals against the sensor, sensor cover, and sensor

cap.

Charcoal Filter Disk in GW-2C

The GW-2C includes a charcoal filter disk which is located in a recessed

area of the sensor gasket beneath the sensor cover. The charcoal filter disk

removes gases from the sampled air that will cause a response on the CO

sensor such as H2S and certain hydrocarbons. If false or elevated CO

readings are noticed, especially in the presence of H2S, change the

charcoal filter disk (see the Maintenance section for instructions).

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