VEGA D86_D87 Hydrostatic pressure transmitters - Manual (Page 4)

4 Pressure transmitters D86/D87
Product description
1 Product description
1.1 Function and configuration
Pressure transmitters D86 and D87 are in-
struments for hydrostatic level measurement.
Pressure transmitter D86
Measuring cell: dry, ceramic-capacitive
Diaphragm: flush, sapphire-ceramic
®
Series: suspension version
Standard application: Level and gauge
measurements in water/sewage water,
flumes, basins, deep wells, vessels and
tanks
Pressure transmitter D87
Measuring cell: dry, metallic-capacitive
Diaphragm: Duratherm 600
Series: suspension version
Standard application: Level and gauge
measurements in water/sewage water,
flumes, basins, deep wells, vessels and
tanks
The pressure effects a capacitance change
on the measuring cell. This capacitance
change is detected by an ASIC (Application
Specific Integrated Circuit) and converted
into a pressure-proportional signal by the
integrated electronic module with
microcontroller. Precise, high-resolution dig-
ital processing of measurement data ensures
excellent technical data.
To improve reliability, the functionality of im-
portant electronic components is continu-
ously checked, and internal parameters such
as sensor value, temperature and operating
voltage are closely monitored.
Output signal
The output signal is transferred as a digital or
analogue signal from the pressure transmitter
to the signal conditioning instrument:
• analogue output signal
- unstandardised (in conjunction with
VEGA signal conditioning instrument)
- 4 … 20 mA standardised
• digital output signal (VBUS) for connection
to a digital VEGA signal conditioning instru-
ment (VEGAMET 514V, 515V or VEGALOG
571)