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HVG-2020B Instruction Manual
The analog output voltage is available on pin 5 and referenced to analog common on pin 8. The voltage output
may be set to 1, 5 or 10 volts full scale. The standard value is 10 volts and will have been set as such unless
another value was specified at time of order. The analog full-scale settings can be changed in the field with
digital commands.
NOTICE: The load resistance must be no less than 1 kΩ for voltage output to maintain accurate
readings.
Optional to the standard voltage output is the 0-20 mA or 4-20 mA current output that is proportional to
pressure. The current loop output is useful for remote applications where pickup noise could substantially
affect the stability of the voltage output. The current loop signal replaces the voltage output on pin 5 of the D"
connector and is returned on pin 8.
NOTICE: The loop load must be less than 1.2 kΩ. Failure to meet this condition will cause failure of the
loop transmitter. Wiring diagrams for power and 4-20mA signals are shown below.
NOTICE: The power requirements are greater when using 0-20mA and 4-20mA output signals.
NOTE: 0-20mA cannot indicate a negative zero offset.
EAR99 Technology Subject to Restrictions Contained on the Cover Page
4 – 20 mA wiring diagram w/ unipolar supply
Page 16 of 40
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