Inficon Sensistor ISH2000 HySpeed, Руководство по эксплуатации

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Hydrogen leak detector Sensistor ISH2000 - Operating Manual
18 OM-Sensistor ISH2000-EN-201304
EN
Hint: It is good practice to detect a leak, locate it, and immediately remove the probe
to avoid saturation. The probe is not damaged by the exposure but it will recover more
slowly. After excessive exposure it will be less sensitive for a short period of time.
6.3 To Quantify Leaks
The Measuring Mode (or use the figures in Combined Mode ) is used for measuring
the size of a leak (or the concentration of a gas sample). To be able to do this
measurement and obtain correct values, the instrument must first be calibrated using
the calibration function.
In the Measuring Mode the detector determines the gas concentration from the
change, as the probe goes from being exposed to background to being exposed to a
certain gas concentration. The detector does not continuously monitor the gas
concentration but takes just one reading instead. Another suitable alternative name
for this mode could be Sampling Mode. It is important to keep this in mind when using
the detector in this mode.
In Measuring Mode the probe should be moved directly from a background situation
to the test point. The size of the leak in cc/s, or any other selected units, is shown on
the display. The probe can and should be removed from the measuring point as the
measured value steady and remains on the display. The period during which the
measured value is displayed can be adjusted in the
Measuring Mode Settings menu.
The leak detector operates in the range 0.5 - 2000 ppm H
2
giving linearity between 0.5
and 500 ppm. To obtain greatest accuracy over this range, follow the calibration
recommendation. See “Calibrate the leak detector” on page 19.
CAUTION!
• Do not open detector! Service of this equipment may only be carried out by ser-
vice organizations authorized therefore by INFICON, Sweden.
• If the detector gets outer damage it must be controlled and repaired by service
organization authorized by INFICON.
• Do not expose the probe to a hydrogen concentration higher than 0.1% when
the instrument is not put into operation, this might damage or destroy the probe
sensor.
• When the instrument is put into operation the sensor withstands temporary
exposure to hydrogen concentration up to 100%. Avoid long exposures to high
concentrations.