CiDRA SONARtrac PW VF-100 - Manual (Page 106)

20833-01 Rev 04 Page 7-12
7.4 Transmitter Input Definitions
The Gas Volume / Void Fraction calculations use inputs of pressure
and temperature. These inputs can be made through the use of
pressure and temperature transducers, or alternatively, an assumed
value for pressure and temperature can be input into the transmitter
during its setup. Note: These sensor inputs are not used for VF-100
or HD-VF-100 meter operation.
Two transmitter terminal blocks (shown below) are provided for
pressure and temperature transducers.
Figure 11 Transmitter Sensor Terminals
SENSOR 1 & 2 – Used in certain installations for inputs from user-
supplied loop powered 4-20mA pressure or temperature transmitters
which the passive sonar meter transmitter supplies with a nominal +/-
12V. The pressure or temperature transmitter electrical connections
must be isolated from ground ("floating").
When used in Hazardous area installations, be certain to follow
the wiring instructions contained in the Control Drawings for the
passive sonar meter transmitter as well as the Control Drawings
for the Hazardous area-rated pressure or temperature
transmitters. The Class I, Division 2 passive sonar meter
transmitter Control Drawings can be found in an appendix of this
manual. The ATEX Class I, Zone 2 passive sonar meter
transmitter Control Drawings can be found in an appendix of
SONAR PROCESS MONITORING SYSTEM SUPPLEMENT FOR
ATEX ZONE 2 SAFETY. Note that certain hazardous-area-rated
models of passive sonar meter transmitter consider this interface
to be Non-incendive field wiring with entity parameters and that
certain other hazardous-area-rated models of passive sonar
meter transmitter do not consider this interface to be Non-
incendive field wiring.