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GasCheck G Instrument User Manual V2.4
Unrivalled Gas Detect ion.
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'Esc' key twice to exit to the main menu.
Gas selection
3
GasCheck G is calibrated using Helium gas at manufacture, however other gases can be
detected and measured using a gas table within the instrument.
Although GasCheck G can't differentiate between gases it can quantify other gases using
response factors stored in its internal gas table. Gas groups 1 2, 3, 4 and 5 offer a generic
sensitivity.
The following list indicates response factors for specific gases however for advice on gases
not listed please contact Ion Science Ltd for advice.
Name Abbreviation
Minimum sensitivity
cc/sec (ml/sec)
Minimum sensitivity
cc/sec (ml/sec)
Hydrogen H2 7.7 E-6 cc/sec 0.0000077 cc/sec
Helium He 1.0 E-5 cc/sec 0.000010 cc/sec
Refrigerant R12 R12 2.7 E-5 cc/sec 0.000027 cc/sec
Refrigerant R1301 R1301 2.4 E-5 cc/sec 0.000024 cc/sec
Refrigerant R134a R134a 5.8 E-5 cc/sec 0.000058 cc/sec
Refrigerant R22 R22 2.6 E-5 cc/sec 0.000026 cc/sec
Refrigerant R11 R11 3.2 E-5 cc/sec 0.000032 cc/sec
Sulphur Hexaflouride SF6 2.2 E-5 cc/sec 0.000022 cc/sec
Carbon dioxide CO2 4.0 E-5 cc/sec 0.000040 cc/sec
Methane CH4 2.9 E-5 cc/sec 0.000029 cc/sec
Argon Ar 3.5 E-5 cc/sec 0.000035 cc/sec
Oxygen O2 2.9 E-4 cc/sec 0.000290 cc/sec
Refrigerant R502 R502 3.0 E-5 cc/sec 0.000030 cc/sec
Refrigerant R404a R404a 3.2 E-5 cc/sec 0.000032 cc/sec
Refrigerant R407c R407c 3.3 E-5 cc/sec 0.000033 cc/sec
Refrigerant R410a R410a 3.2 E-5 cc/sec 0.000032 cc/sec
Refrigerant R507 R507 3.8 E-5 cc/sec 0.000038 cc/sec
To select an alternative gas use the 'Up and Down' keys to select the desired gas and then
press the 'ENTER' key to confirm the selection, at which point a tick will appear. Press the
'ENTER or Esc' key to exit into the 'Main menu'.
If the gas to be detected does not appear in the instruments internal gas table then one of
the five 'Gas Groups' can be selected. 'Gas Groups' have a variation of sensitivities. (Group 1
being high sensitivity through to Group 5 being low sensitivity) Contact Ion Science Ltd for
advice.
Gas groups allow the instrument to calculate leak rates with reasonable accuracy.
Upgrade
1 & 2
The GasCheck G instrument can be upgraded using a simple upgrade code.
This facility allows GasCheck G to be upgraded instantly by the user in the field.
The table below shows the various features within each model