Maintenance Menu; Sl - Set Output To X Ma; Cl - Calibration Of Output Signal - Dräger PEX 3000 Instrucciones Para El Servicio

Maintenance Menu

Maintenance Menu
To enter the maintenance menu press key
display shows "SL" and the point on the right bottom flashes to indicate the
maintenance mode.
SL – Set Output to x mA
By means of this function the transmitter's output signals can be set to certain
constant values.
Attention:
This function can activate alarm conditions at controller unit!
Navigate by means of keys
q l
press keys ( + ) to enter.
— The signal output of the transmitter is set to 4 mA, the display shows "04".
q
By means of the keys
22 mA in steps of 1 mA. Pressing the keys for longer activates a repeat function.
q l
Press keys ( + ) to terminate this function. The display shows SL again.
q
Press key to step back into measurement mode.
CL – Calibration of Output Signal
By means of this function the signal output of the transmitter can be adjusted such
that a current of 4 mA corresponds to 0 % LEL and a current of 20 mA corresponds
to 100 % LEL or 10 % LEL.
Generally the output signal can be measured at the controller side as voltage drop
across the input resistance, if not the 4 to 20 mA-loop has to be interrupted to install
an amp meter fort his purpose.
Attention:
If the current loop is interrupted for this purpose the explosion protection is
not ensured!
Navigate by means of keys
q l
Press keys ( + ) to adjust the lower reference point, the display shows "04" cor-
responding to 4 mA.
Measure the current by means of the amp meter.
q
By means of the keys
reads a current of 4 mA as accurate as possible (between 3.95 toand 4.05 mA).
q l
Press keys ( + ). By this the lower reference point is saved and the menu swit-
ches over to the upper reference point. The display shows "20" corresponding to
20 mA.
Measure the current by means of the amp meter.
q
By means of the keys
reads a current of 20 mA as accurate as possible (between 19.95 and to
20.05 mA). Pressing the keys for longer activates a repeat function.
q l
Press keys ( + ) to save the upper reference point and terminate this function.
The display shows CL again.
q
Press key twice to step back into measurement mode.
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l
for more than 3 seconds until the
q l
or until the display shows SL ("Set Loop") and
l
or the signal output can be adjusted between 1 and
q l
or until the display shows CL ("Calibrate Loop").
l
or adjust the signal output such that the amp meter
l
or adjust the signal output such that the amp meter
9023810 - 2nd edition - September 2005