_
Dräger PEX 3000
HQ
_
Operation
4.3.2 Calibration
menu
– To enter the calibration menu, press the
▼
key for more than one second
but less than three seconds. The display shows a flashing point on the
bottom right indicating the calibration mode.
ZE – Calibrating the zero-point
– Navigate using the
▲
or
▼
keys until the display shows ZE ("ZEro") and
confirm by pressing the (
▲
+
▼
) keys. The output signal switches to 3.4 mA.
– The display shows the currently measured gas concentration (negative
values are displayed up to “–9” or “-.9”).
– Apply zero gas to the sensor and wait for signal stabilisation (max.
3 minutes).
– Press the (
▲
+
▼
) keys to save the displayed value as a new zeropoint.
– Press the (
▲
+
▼
) keys once again to exit the function. The ZE display
appears once again.
– Press the
▼
key to the calibrate the span or
– Press the
▲
to switch back to measuring mode.
SP – calibrating the span
– Navigate using the
▲
or
▼
keys until the display shows SP ("SPan") and
confirm by pressing the (
▲
+
▼
) keys.
– The display shows the test gas concentration used during the previous
calibration in %LEL.
– Use the
▲
or
▼
key to set the concentration of the test gas currently in
use between 20 and 99 %LEL in 1 %LEL steps (or 0.1 %LEL steps
between 2.0 and 9.9 %LEL). Pressing the keys for a longer period
activates the repeat function.
– Press the (
▲
+
▼
) keys, apply test gas to the sensor and wait until the
displayed measured value has stabilised (maximum of 3 minutes).
– Press the (
▲
+
▼
) keys to recalculate and save the internal amplification.
– Press the (
▲
+
▼
) keys to display a reference value for the sensor’s
sensitivity (constantly amplified bridge signal).
– Press the (
▲
+
▼
) keys to exit the function. The display shows SP once
again.
– Press the
▲
key twice to return to measuring mode.
4.3.3 Maintenance
menu
– To enter the maintenance menu, press the
▼
key for more than 3 seconds
until the display shows “SL” and the point in the bottom right corner flashes
to indicate the maintenance state.
SL – set current output to X mA
This function can be used to set the transmitter’s output signals to specific
constant values for test purposes.
NOTICE
This function can trigger alarms at the controller!
41495
41497
41503
Содержание PEX 3000
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Страница 97: ...Declaraci n de conformidad _ HV _ Dr ger PEX 3000 10 Declaraci n de conformidad 43496...
Страница 98: ...HV _ Declaraci n de conformidad _ Dr ger PEX 3000 Esta p gina ha sido dejada en blanco a prop sito...
Страница 99: ...Declaraci n de conformidad _ HV _ Dr ger PEX 3000 Esta p gina ha sido dejada en blanco a prop sito...