Gas Measurement Instruments Gascoseeker 2-500 - Manual

CHECKLIST
1. Check the instrument has no obvious faults.
2. Check accessories.
3. Read and understand handbook before use.
4. Switch ON (see overleaf)
5. Check battery levels.
6. Check “ZERO” in fresh air.
SAFETY
• The instrument must be regularly serviced and calibrated
by fully trained personnel in a safe area.
• Batteries: Alkaline batteries must be exchanged in a
safe area and fitted correctly before use. Never use
damaged batteries or expose to extreme heat.
• Only GMI replacement parts should be used.
• If the instrument detects gas, follow your own organisa
tion’s procedures and operational guidelines.
• The combustion chamber is a flameproof assembly and
must not be opened in the presence of a flammable
atmosphere.
• Gascoseeker 2-500 instruments are certified as:
EEx iad IIC T4 (-20
o C < Tamb < 50 o C).
BAS01ATEX2292 II 2 G.
UL Class 1 Groups A, B, C and D.
• This equipment is designed and manufactured to protect
against other hazards as defined in paragraph 1.2.7 of
Annex II of the ATEX Directive 94/9/EC
Any right of claim relating to product liability or consequential
damage to any third party against GMI is removed if the warnings
are not observed.
Part Number: 13889 Issue 2 (15/03/2004)
GASCOSEEKER 2-500 OPERA
TING INSTRUCTIONS
AREAS OF USE
Exposure to certain chemicals can result in a loss of sensitivity of the flammable
sensor. Where such environments are known or suspected it is recommended
that more frequent response checks are carried out. The chemical compounds
that can cause loss of sensitivity include Silicones, Lead, Halogens and Sulphur.
Do not use instrument in potentially hazardous atmospheres containing greater
than 21% Oxygen. The enclosure material is polypropylene and must not be
exposed to environments which are liable to result in mechanical or thermal
degradation or to damage caused by contact with aggressive substances.
Additional protection may be required in environments where the instrument
enclosure is liable to damage.
OPERATOR MESSAGES / FAULT FLAGS
Various messages can appear on the LCD screen to indicate instrument status.
‘SAMPLE’
Indication that the pump is running and the instrument is sampling.
’OFF’
Indication that the instrument is about to switch OFF. Can be reset by pressing
MEASURE button once.
‘SAMPLE FAULT’
Indication that the instrument sample flow is incorrect due to sample path
blockage or pump failure.
‘CHECK ZERO’
Indication that there may have been a zero shift due to the presence of gas.
Switch off the instrument and switch on again in fresh air.
‘ZERO FAULT’
Indication that zero is outside calibration limits. Switch instrument OFF and
initiate ZERO sequence with instrument in fresh air to reset zero.
‘BAT’ (Flashing)
Indication that the batteries will soon require replacement as indicated by BAT
FAULT flag.
‘BAT FAULT’
Indication that the batteries require replacement.
‘ZERO’
Indication that the instrument is in the ZERO mode.
GAS MEASUREMENT INSTRUMENTS LTD.