Type / No.
Rev.
Date
Page
Total pages
EW082.695_en
5
02 August 2010
18
28
EsiWelma
s.r.l.
4.6
Output test mode
During the warm-up phase only, enter the monitoring mode and press
9
to access a menu
where it is possible to directly test the outputs, or press
0
to access the 4…20mA
calibration procedure described in the relative paragraph.
The display will show the following:
WARNING: the 0XXX values shown on the fourth line are the values of the A/D converter
corresponding to the two calibration points of the sensor.
Press key:
1
To activate and deactivate the fail alarm relay output
2
To activate and deactivate the alarm relay output for exceeding the 2
nd
threshold
3
To activate and deactivate the alarm relay output for exceeding the 1
st
threshold
4
To activate and deactivate the pre-alarm relay output
To increase the output current on measurement terminals 3 and 4 up to 22mA
To decrease the output current on measurement terminals 3 and 4 down to 0mA
To exit output test mode and return to monitoring mode.
Note: for the functions relating to keys 1, 2, 3 and 4 it is necessary to have the UZR20.4 relay
card in the equipment.
The warm-up phase is suspended during output test mode and starts again after returning to
monitoring mode.
If no key is pressed for 5 minutes during output test mode, it automatically exits and returns
to monitoring mode.
C a l i b . 4 - 2 0 m A : 0
T e s t : 1 , 2 , 3 , 4 , + , -
t 0 = 0 X X X t = 0 X X X
Fig. 4.20
