INFICON HLD6000 Refrigerant Leak Detector - Manual (Page 43)

6 Operation
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Option 2:
Alternatively, you can calibrate the device for the desired gas without accessing an exter-
nal calibration leak with the desired gas:

The internal COOL-Check with coolant R134a is used as a basis and the discrepancy for the
desired gas is automatically corrected by means of an adjustable calibration factor on the
device.

For most gases the required calibration factors from INFICON can be used.
1 To freely select a gas, select " > Gas" and then set up "User 1", "User 2" or "User 3".
2 In the setting window under "User Gas Factor" enter the calibration factor which you
received from INFICON.

When carrying out the unit calculation of user gases in mbar l/s and Pam
3
/s an average
molecular weight of 96 is assumed. If this is not accurate enough then calibrate exter-
nally using a test leakage value in the corresponding unit.
Then calibration with the internal COOL-Check can be carried out, see "6.4.6.2 Calibration
with an internal COOL-Check", page 44 .
6.4.5 Verifying R290 with the sniffer line for R600a/R290
It is also possible to verify R290 (propane) with a sniffer line for R600a.

The measuring sensitivity for R290 is approx. 7% higher than for R600a.
You have the option of
 calibrating with an external calibration leak with R290 to avoid overly high displays or
 calibrating with an external calibration leak with R600a.
If sniffing with the R290 then the displayed measurement results will be 7% too high.

It is therefore recommended to also set the setpoint 7% higher than for sniffing with
the R600a.
6.4.6 Calibration
6.4.6.1 Time and type of calibration
The device should be calibrated daily and after every operator change. Calibration is also
required after the following actions:
 Switching the sniffer line
 Switching the sniffer probe
 Switching between the gases
 Request for calibration by the system
If you insert a COOL-Check calibration leak then this is the easiest method to calibrate the
device. The COOL-Check is integrated into the base plate of the device as described in the
separate COOL-Check installation manual.
The leakage rate of the COOL-Check is temperature compensated and thus makes the ac-
curacy required for calibration possible. The COOL-Check calibration leak contains R134a.
The most accurate calibration is achieved with the external calibration leak. The calibra-
tion leaks apply to one gas each and are temperature resistant.
When using a sniffer line for R744 (CO
2
) or a sniffer line for R600a/R290 then calibration can
only take place with one external calibration leak.