Switching on
Before switching on check all electrical connections to make sure they are correct. On
completion of the installation, the device can be switched on by applying the supply voltage.
Starting sequence
During the switching-on process, a segment test is performed for approx. 1 second, whereby all
LED on the front (including switchpoint LED) are triggered. After this, the type of software is
indicated for approx. 1 second and then, also for 1 second, the software version. After the
starting procedure, the unit changes to operation mode / display mode.
Min/max-memory
The measured minimum- and maximum-values are saved in a volatile memory in the unit and
get lost when the unit is switched off.
You can call up the contents of the memory by pushing (less than 1 second) the
[
▲
]-
or
[
▼
]
-
key
. The relevant value is indicated for approx. 7 seconds. By briefly pressing the same key
again, you will return immediately to the display mode.
[
▲
]
⇒
display of max-value
[
▼
]
⇒
display of min-value
Erase the value that is shown in the display by simultaneously operating the
[
▲
]-
and
[
▼
]-keys
.
The erasure is acknowledged by horizontal bars. The content of the memory will be lost with
switching off the device.
11
6. Operation and function description
6.2 Alarms / Relays
With the aid of the LED next to the 7-segment display, the switching state of the relays is
displayed. An active relay is indicated by the relevant LED lighting up.
The relays have the following properties with regard to their switching characteristics:
Setpoint x
deactivated or activated
Threshold
threshold value for switchover
Hysteresis
width of the window between the switch thresholds
Operating principle
active above SP value / active below SP value
Switch-on-delay
time between reaching the threshold and the resultant switching on
of the relay
Switch-off-delay
Time between reaching the threshold and the resultant switching
off of the relay
Overflow / Underflow
Overflow
An
overflow
of the display is indicated by horizontal bars at the top of the
7-segment display.
Underflow
An
underflow
of the display is indicated by horizontal bars at the bottom of the
7-segment display.
