TESTO 6381 Instruction Manual page 58

4 Transmitter
✓ A precise pressure sensor (5-times more accurate than the
transmitter, e.g. DPC precision pressure sensor from testo
industrial services) is available.
1. Connect the positive output of the pressure sensor (3) to the
positive pressure connection of the transmitter (1) and the
negative output of the pressure sensor (3) to the negative
pressure connection of the transmitter (2).
2. Transfer the reference pressure value created with the pressure
sensor into the P2A software (see volume 2, 7.3.4.3. n-point
adjustment) or enter it via the user menu ().
3. Repeat step 2 for all of the measuring points.
4. Disconnect connections between the pressure sensor and the
pressure connections of the testo 6381.
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The number of measuring points is set to 3 by the factory
and can only be changed using the P2A software (see
volume 2, 7.3.4.3. n-point adjustment).
The n-point adjustment must always be carried out to its full
extent and in good time at all selected measurement points.
1 Positive pressure connection
2. Negative pressure connection
3. Pressure sensor