Display And Control Unit - BD Sensors LPT 200 Betriebsanleitung

8. Operation

8.1 Display and control unit

Mode of
output
signal
Bar graph
Fig. 4 Display
- / symbol
This symbol on the display indicates that the output signal has a linear
characteristic.
√ symbol
-
This symbol on the display indicates that the output signal has a square root char-
acteristic.
- symbol
This symbol shows when the signal has transgressed its upper or lower limits.
A bar graph is included on the display; this shows the acting pressure as a percentage of
the measuring range. The display indicates the measured value as well as allowing
configuration of the individual parameters using menus. The individual functions can be
set using two push buttons (accessible from the top). The device can be configured in situ
without opening the display and control module. In order to do so, the metal plate (on top
of the device) must be rotated to the rear after undoing the left screw. From left to right,
the two buttons are assigned to: Z, S.
Devices with and without a display are operated in different ways.
Devices without a display:
These are operated as follows:
Press both buttons for about 2 to 5 sec, briefly release them, and then press Z(ero) or
S(pan) for a further 5 – 10 sec. Press to perform the desired operation. Z then sets the 4
mA value to the acting pressure; S sets the 20 mA value to the acting pressure. It must be
ensured that the acting pressure is stable while performing either of these operations.
Devices with a display:
The menu system is self-contained. It allows you to "browse" both forwards and
backwards through the individual settings menus in order to reach the desired setting item.
All settings are permanently saved in a flash EPROM and are therefore retained even after
the supply voltage has been disconnected.
Measured value
Unit
Z S
Fig. 5 Push buttons
EN