4
– A fresh air calibration can be performed at start up. The gas value will flash
for approx. 5 seconds after indication of the alarm limits. Press
[OK]
during
this period to perform the fresh air calibration. If during the flashing period
no key or
[+]
is pressed then the fresh air calibration is skipped and the de-
vice will go into the measurement mode.
5.2 Before entering a working place
– Use the clip to attach the device to clothing before working in or near poten-
tial gas hazards.
– After turning the device on, the actual measurement value will normally be
shown in the display.
5.3 Performing a “bump test” with gas
– Prepare a Dräger test gas cylinder with 0.5 l/min flow regulator and a gas
concentration higher than the alarm threshold to be tested.
WARNING
For the O
2
sensor: after the first activation of the device, a sensor warm up
time of up to approx. 15 minutes is needed; for all further activations the
warm up time is approx. 1 minute. The gas value flashes and the
[!]
icon is
lit until the warm up time has passed, and until the second warm up time has
passed.
WARNING
The CO and H
2
S have a 15 minute warm up after the first activation of the
device. For all further activations, these sensors will be ready immediately
after the activation sequence.
WARNING
The gas opening is equipped with a dust and water filter. This filter protects
the sensor against dust and water. Do not destroy the filter. Contamination
may change the properties of the dust and water filter. Replace destroyed or
clogged filter immediately. Ensure that the gas opening is not covered and
that the device is also near to your breathing area. Otherwise the device will
not work properly.
WARNING
If the notice icon
[!]
is lit after turning the device on, it is recommended that
you perform a bump test.
CAUTION
Risk to health! Test gas must not be inhaled.
Observe the hazard warnings of the relevant safety data sheets.
– Insert the Dräger Pac 3500/5500 and connect the test gas cylinder to the in-
let (back most) nipple on the calibration adapter or to the Dräger Bump Test
Station.
– To enter the bump test mode manually press the
[+]
3 times within
3 seconds. The device beeps twice, quickly. The Display begins to flash
slowly and the
[!]
icon appears.
– Open the regulator valve to let test gas flow over the sensor.
– If gas concentration exceeds the alarm thresholds A1 or A2 the correspond-
ing alarm will occur.
– To finish the bump test press
[OK]
, the
[!]
icon is removed from the display
and the device returns to the measuring mode.
– If during the bump test no alarm occurs within 1 minute, the device alarm
mode is entered to indicate failure. The error icon
[X]
flashes; error code 240
is shown in the display until the error is acknowledged. "
– – –
" is shown in-
stead of the measured value and the
[X]
icon is displayed. In this case the
bump test can be repeated or the device can be calibrated.
– The result of the bump test (passed or failed) will be stored in the event log-
ger (see section 5.6).
– The bump test can also be finished automatically by the instrument without
pushing the "OK" button. This function can be activated using the PC soft-
ware CC Vision (see section 5.7).
– If the bump test has been carried out successfully, the display shows " GO ".
– If the bump test mode was entered by mistake, while the notice icon
[!]
is lit,
press
[+]
to cancel the bump test mode and switch over to measurement
screen.
5.4 During operation
– If the allowable measurement range is exceeded or a negative drift occurs,
the following will appear in the display: “
” (too high concentration) or
“
” (negative drift).
– Alarms are indicated as described in section 6.
– Continuous function of the device is indicated by the life signal, which is a
beep every 60 seconds, if configured (see section 4).
5.5 Turning the device off
– Simultaneously hold both keys for approximately 2 seconds until "3" ap-
pears in the display. Continue to hold both keys until the countdown is fin-
ished. A horn signal indicates that the device is turned off.
5.6 Event logger
– Dräger Pac 3500/5500 is equipped with an event logger. The event logger
stores 60 events. If event No. 61 occurs the logger overwrites the oldest
stored event.
– For download of the stored data connect Dräger Pac 3500/5500 to a PC us-
ing the connecting cradle or the E-Cal System. The stored data can be
downloaded with installed software Gas Vision.
