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1
INTRODUCTION
1.1
Scope and definitions
This manual provides installation, operation and maintenance instructions for the Gas Check 5000is.
You must use the Gas Check as specified in this manual.
Read this manual before you install and operate the Gas Check. Important safety information is
highlighted as WARNING and CAUTION instructions; you must obey these instructions. The use of
WARNINGS and CAUTIONS is defined below.
.
The units of measurement used throughout this manual conform to the SI international system of
units of measurement
1.2
Description
Refer to Figure 1. The Gas Check is a portable, battery-powered, hand-held gas leak detector.
Indications of a leak are shown on the digital display (2) and are also given by a front panel mounted
LED flasher (3) and as audible clicks from the rear panel loud speaker (6).
·
The Gas Check 5000is is intrinsically safe and is suitable for leak detection of hydrogen and other
flammable gases, and for leak detection in hazardous areas of EEx ia IIC T4 rating.
The Gas Check has a convenient storage and carrying case, together with a spare battery holder, a
long flexible probe (for leak detection in areas where access is restricted) and a box-spanner for
probe changing.
1.3
Principal of operation
When the Gas Check is switched on, a small internal fan draws gas samples through the probe and
into the Gas Check. The Gas Check measures the thermal conductivity of the gas samples.
When you first switch on the Gas Check (using the power I/O key) or when you press the zero key :
see Section 4.1), the Gas Check zeros the leak rate display. If further samples have a different
thermal conductivity from the zeroed sample, the Gas Check calculates and displays the difference as
a leak rate. This means that you can use the Gas Check to detect any gas other than that in which
the Gas Check is zeroed.
WARNING
Warnings are given where failure to observe the instruction could result in
injury or death to people.
CAUTION
Cautions are given where failure to observe the instruction could result in
damage to the equipment, associated equipment and process.
