6
Use
en
4
Use
4.1
Preparations for use
4.1.1
Initial start-up
The gas detector remains in deep sleep mode upon delivery
and must be activated during the initial start-up.
1. Hold down the [
▼
] button for approx. 3 s.
This activates the gas detector.
4.1.2
Switching on the gas detector
1. Hold down the [OK] button for approx. 3 s.
The following is displayed or activated:
Display elements, LEDs, alarm signal and vibration alarm
Self-test
Software version and gas name
Alarm thresholds A1 and A2
Time to next calibration (configurable)
Time to expiration of the bump test interval (configurable)
Before every use, check whether the display elements and
information are displayed correctly.
A warm-up phase takes place when first switching on the gas
detector (duration depends on the sensor type; see the sensor
data sheet).
4.1.3
Switching off the gas detector
Hold down both keys for approx. 3 s, until shut-down is
complete.
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.
To ensure correct function:
Do no cover the gas inlet opening.
Place the gas detector on clothing near the mouth.
At temperatures below -20 °C, there may be deviations of
>10 % of the measured value if the corresponding sensor
was calibrated at room temperature. Dräger recommends
calibration at the primary application temperature if
measurements will be taken at very low temperatures. This
enables the highest possible measurement accuracy.
After the gas detector has been switched on, the current
measured value is shown in the display.
Check whether the warning [!] appears. If it is displayed, we
recommend performing a bump test, see Section 4.2.3 on
Page 6.
4.2.1
Activating the quick menu
The quick menu can be activated using the Dräger CC-Vision
Basic PC software.
Up to two preferred functions can be saved in the quick menu.
The following functions are available:
Fresh air adjustment
Bump test
4.2.2
Opening the quick menu
Prerequisite:
The quick menu is activated.
To open the quick menu:
1. Press the [
▼
] button three times within three seconds. A
double signal tone sounds.
2. Depending on the configuration, the fresh air calibration
symbol or the bump test signal will flash.
3. Press the [OK] button to start the feature or press the [
▼
]
button to switch to the next feature or to return to
measuring mode (depending on the configuration).
The quick menu closes automatically after 60 s of inactivity.
4.2.3
Carrying out a manual bump test
WARNING
Danger to health! Do not inhale the test gas.
►
Pay attention to the hazard information in the respective
safety data sheets.
Two modes can be selected for a bump test. Use the Dräger
CC-Vision Basic PC software to set the mode.
Quick bump test (test for alarm triggering)
Checks whether the pre-alarm threshold (A1) is
exceeded (or not reached in the case of O
2
).
Checks whether the concentration remains above the
alarm for a specified period of time.
Checks whether the test duration remains below a
specified maximum time period.
Advanced bump test (test for accuracy)
Checks whether the defined test gas concentration is
reached within a specified tolerance. The tolerance is
defined with a default value for each gas in the gas
detector, but can be adjusted by the user as needed.
Checks whether the test gas concentration remains
within the tolerance window for a specified time period.
Checks whether the test duration remains below a
specified maximum time period.
The bump test can be performed as follows:
Manual bump test (with quick menu)
Bump test with X-dock (see instructions for use for the
Dräger X-dock)
Bump test with the Dräger Bump Test Station (see the quick
reference guide on the Dräger Bump Test Station)
