Manual Span Calibration Of The Output Signal - Dräger PIR 3000 Instructions For Use Manual

Manual span calibration of the output signal.

The span calibration of the gas transmitter is only possible under the following
conditions:
— The last zero calibration of the device was less than one hour ago.
— The span gas concentration is sufficiently high to effect a display on the device of
at least 20% LEL.
●
Deactivate alarm activation of the central device.
1 Use calibration adapter to expose gas transmitter to test gas and wait until meas-
urement value stabilises.
2 Place the magnetic pin onto the transmitter surface area marked by the "
icon and hold it there (within the black frame) for at least 5 seconds. The output
signal of the gas transmitter changes to the display of the span gas signal (3 mA).
3 Remove the magnetic pin. The output signal of the gas transmitter changes back
to the normal display. The device is now set to span calibration routine. While in
this routine, the display will decrease resp. increase, depending on whether the
magnetic pin is placed on either of the areas marked by the "
icons.
4 Adjust the output signal by placing the magnetic pin on one of the areas marked
by the " 0 " or "
S
5 Remove the magnetic pin. The device terminates the span calibration routine after
30 seconds without further changes being made and saves the new calibration
parameter. The output signal momentarily switches back to the span gas signal
display to confirm a successful calibration.
6 Stop the exposure to gas, then wait for the display to fall back to zero.
●
Reactivate alarm activation of the central device.
display
test gas concentration
0
–6.25 %LEL
(3 mA)
" icons.
(1) I (2) I (3) I
I
S
"
S
0 " or " "
S
(4) (5)
I
S 0
Operational Characteristics
I (6)
time
15