VEGA D77 Hydrostatic pressure transmitters - Manual (Page 19)

Pressure transmitters D76 and D77 19
Setup
Adjustment information:
- A modification of zero does not influence
the adjusted span.
- It is also possible to adjust currents for
partial fillings, e.g. 8 mA for 25 % and
16 mA for 75 %. Then the electronics auto-
matically calculates the current values for
0 % and 100 % (only possible with a differ-
ence
³ 3.3 %).
- If the current values react to the key press-
ing with a time delay, there can be two
reasons:
- the last adjustment was carried out with a
level deviating considerably from the
actual level.
Integration time
For damping level fluctuations, an integration
time ti of 0 … 10 sec. can be adjusted.
Adjust integration time
• Set rotary switch to "ti“.
• By pressing the "-“ key 10 times make sure
that the integration time is set to 0 sec.
• Per 1 sec. requested integration time, the
"+“ key has to be pushed once.
The integration time is the time required by
the current output signal to reach 90 % of the
actual level after a sudden change of the
level.