902B Abs Piezo
Operation manual
9
Transducer installation (electrical)
The 902B is available with different input/output connectors. Use a cable with strain relief to ensure proper
electrical connection and to reduce stress on the connectors.
Ensure a low impedance electrical connection between the 902B transducer body and the
grounded vacuum system to shield the sensor from external electromagnetic sources.
Ensure that the analog output is connected to a floating input.
The power supply input is 9 to 30 VDC. The power supply input is protected by an internal thermal fuse. The
fuse is self-recoverable; do not replace it. Damage may occur to the circuitry if excessive voltage is applied,
polarity reversed or if a wrong connection is made.
If using the analog voltage output, connect the positive analog out and negative analog out pins to a
differential input voltmeter or an analog-to-digital (A/D) converter.
Do not connect the negative side of the
analog output to
the negative side of the power supply input or to any other ground. Doing so will cause half
of the power current to flow through this wire. Measurement errors in the output voltage may be seen due to
the voltage drop from this current. The longer the cable, the worse the error will be. Do not connect the set
point relay terminals to the analog output.
Correct connection of analog output to floating input
Incorrect connection of analog output to non floating input
