Copyright 2022 Baker Hughes Company.
English–DPI610E Instruction Manual| 77
Functions
6.2.3.4 Normal and Pseudo Pressure Range
Internal and external pressure sensors are either gauge (measuring with respect to atmospheric
pressure) or absolute (measuring with respect to vacuum). The measured readings from these
sensors in their native form are referred to as ‘Normal’.
The sensors in pneumatic variants contain an accurate barometer which continuously measures
the atmospheric pressure. This measured reading can be used to convert the internal (or external
if present) pressure sensor reading from natively absolute to gauge or natively gauge to absolute.
These pressure sensor modes are referred to as ‘Pseudo-gauge’ (natively absolute sensor to a
gauge indication) and ‘Pseudo-abs’ (natively gauge sensor to absolute indication) respectively.
The hydraulic variants do not contain the barometer as it is not usual to require gauge readings
at the higher pressure these hydraulic variants work at. Therefore the hydraulic variants do not
support ‘Pseudo-gauge’ or ‘Pseudo-abs’ ranges.
6.2.3.5 Sealed Gauge Pressure Range
Hydraulic variants with internal or external absolute pressure sensors up to 10 bar and above,
can use an atmospheric reading to convert the sensor reading to gauge by taring the atmospheric
pressure value. This sensor mode is referred to as ‘Sealed Gauge’. When a supported absolute
pressure sensor is connected and detected and the pressure function is configured on either
channel, a pop-up window is displayed giving the option to use the sensor in absolute or sealed
gauge mode.
Step 5
Select
OK
to confirm.
Step 6
Check that the desired pressure
channel has been zeroed.
Note:
A Zero Error can occur if the
pressure reading, measured from the
sensor, is outside 1% of the full scale
value when the instrument pressure
port is opened to atmosphere.
