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Use
4.2
Before entering the workplace
WARNING
Serious damage to health!
An incorrect calibration can lead to incorrect measurement results, which may
result in serious damage to health.
►
Before performing safety measurements, check the calibration by way of a
bump test, adjust as necessary, and check all alarm elements. If national
regulations exist, the bump test must be performed in accordance with
these regulations.
WARNING
Incorrect measurement results!
The gas inlet opening is fitted with a filter that protects against dust and water.
Contamination may change the qualities of the dust and water filter.
►
Do not damage the filter. Immediately replace damaged or blocked filters.
For information on calibration, see the technical manual (order no.
90 33 742). The technical manual can be downloaded on the gas detector's
product page under the following internet address: www.draeger.com.
To ensure correct function:
Do no cover the gas inlet opening.
Place the device on clothing near the mouth.
At temperatures of less than -20 °C, the measured value may deviate by
> 10 % if the relevant sensor was calibrated at room temperature. Dräger
recommends calibration at the primary operating temperature if the
measurement will be performed at very low temperatures. Thereby,
maximum measurement accuracy is achieved.
After switching on the device, the current measured value is shown in the display.
Check whether the warning [!] appears. If it is displayed, we recommend
performing a bump test, as described in Section 4.3.
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