Heath Consultants Gas Delivery Unit (GDUnet) - Manual (Page 20)

USER HANDBOOK
1-4
1.2.4 Analysis
The cylinder analysis should be known and within the operating
• Individual cylinders should be analysed.
• Limits on analysis should be clear.
• Method of analysis should be known.
1.2.5 Preferred Values
The typical values that would be used for instruments are given
below. The list is not exhaustive but can be used as a general
guide.
FOR ALL INSTRUMENTS ZERO RANGE - Control Air
Methane Instruments with 10% LEL Range - 0.5% CH
4
Methane Instruments with 100% LEL Range - 2.5% CH
4
Methane Instruments with %GAS Range - 100% CH
4
Methane Instruments with ppm Range - 800ppm CH
4
Methane Instruments with CO Range - 500ppm CO
Methane Instruments with H
2
S Range - 50ppm H
2
S
Note: This list is for guidance only and does not cover all the
ranges or gases that GMI instruments will cover.
1.2.6
For detailed specifications on test limits and gases users
should consult instrument manuals, service bulletins, operating
and limits suit their need and are in line with their Company
procedures.
The manufacturer or his agent should be consulted for up to date
instrument information.