VEGA D85 Hydrostatic pressure transmitter - Manual (Page 23)

Pressure transmitter D85 23
Setup
4 Setup
4.1 Adjustment structure
The hydrostatic pressure transmitters come
with or without adjustment capability.
After connection to the supply voltage, the
electronics carries out a self-test (approx.
2 sec.) and the current in this signal circuit
(sensors with analogue output signal) takes
on a value of > 21.6 mA.
Sensors with adjustment
(electronics version A and C)
Sensors with electronics version A deliver a
pressure-proportional current as measured
value and are not adjustable. All settings
such as adjustment, density correction etc.
are carried out via the signal conditioning
instrument. The sensors with electronics
version C come preadjusted according to the
measuring range of the sensor (factory set-
ting). In unpressurised condition, they con-
sume a current of 4 mA. With a pressure at
the measuring range final value, they con-
sume a current of 20 mA.
Sensors with adjustment insert in the
sensor (electronics version K)
The adjustment insert with selection switch
allows:
- zero adjustment
"z" = empty adjustment
- span adjustment
"s" = full adjustment
- adjustment of an integration time (time) "ti"
Adjustment in external connection hous-
ing VEGADIS 12 (electronics version L)
The adjustment insert with selection switch
(VEGADIS 12 with display) allows:
- zero adjustment
- span adjustment
- adjustment of an integration time (time)
- adjustment of a value for zero point
(empty)
- adjustment of a value for span (full)
- adjustment of the decimal point for the
displayed value
Adjustment with HART ® handheld
(electronics version I, K and L)
The hydrostatic pressure transmitters with
electronics version I, K and L can be ad-
justed with the HART
® handheld like other
HART ® capable instruments. A manufacturer
specific DD (Device Description) is not nec-
essary. The sensors work with the HART
®
standard menus.
Adjustment of VEGA signal conditioning
instrument VEGAMET (electronics version
A and B)
Electronics version A delivers a non-stand-
ardised output signal to a VEGAMET with
analogue input.
Electronics version B transfers the measured
value digitally (VBUS) to a digital VEGAMET
(514V, 515V, 614V).
The signal conditioning instrument itself, as
well as the pressure transmitter, can be oper-
ated by means of the standard six-key ad-
justment field (with clear dialog text display)
on the signal conditioning instrument.