Inficon Sensistor ISH2000 HySpeed, Operating Manual

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Hydrogen leak detector Sensistor ISH2000 - Operating Manual
20 OM-Sensistor ISH2000-EN-201304
EN
7.4 Calibration procedure
Before calibration, the
Calibration Value, Calibration Unit and Leak Gas
in the
Calibration
Menu
must be set. See “Calibration value with Calibration leak” and “Calibration
value with Calibration gas” below.
Let the instrument be in operation for at least 30 minutes to achieve the best
conditions for a calibration.
When calibrating, do the following steps:
1. Go to Menu then Calibration/Calibrate/Enter or just push the button “Cal” on the
main screen.
2. Expose the probe to background.
3. Push the
Start
button or push the probe button.
4. Expose the probe for the Calibration gas/leak
The probe does not have to be exposed to the calibration gas during the entire
Calibration Time
(the time set in the
Calibration
menu while the bar is moving). The
instrument only measures the change as the probe goes from the background air to
calibration gas.
While the calibration time bar is moving, the probe should be exposed to the
Calibration gas or Calibration leak. Wait until the instrument shows “
Gas detected ”
and gives a sound signal. Repeat until you can save the calibration by pressing
Save
or
probe button. If the calibration is not saved, the instrument will revert to the
previous value after one minute.
Note: You will need to repeat the gas exposure procedures 2-3 times to get
Calibration OK
after changing setup or probe. The text
“Calibration failed! Check
leak/gas and sensor status”
(or a custom text) will appear after 5 attempts.
• Allow at least 30 seconds between each exposure for best accuracy!
• If the message “
No gas or Unstable Signal
” is displayed repeatedly - go back to
Locating Mode and check functionality.
• If “
Calibration in progress. Please repeat again”
is displayed it means that the
measured value deviated more than 10% from the previous calibration. Repeat
the calibration procedure.
7.5 Calibration value with Calibration leak
When measuring leak flow you will, in normal cases, calibrate the detector with a
Calibration leak.
Set the
Calibration Value
equal to the calibrated flow of your Calibration leak. Also
set the
Calibration Unit
to the same unit as that used to express the leak rate of the
Calibration leak. Finally set the Leak Gas that the leak is defined for. These values
can be found on the calibration certificate issued for the leak. Finally set the Leak
Gas that the leak is defined for. These values can be found on the calibration
certificate issued for the leak.
Example : Calibration leak rate is defined to: 4.2E-5 mbarl/s for Helium.
1- Set
Calibration Value
= 4.2E-05.
2- Set
Calibration Unit
= “mbarl/s