INSTALLATION
LOCATION
: Select a location where temperature of the
unit will be between 20°F and 120°F. Distance from the
receiver is limited only by total loop resistance. See
“Electrical Connections.” The tube feeding the pressure
to the instrument can be run practically any length
required, but long lengths will slightly increase response
time. Avoid surfaces with excessive vibration.
POSITION
: A vertical position is recommended, as all
stocked models are spanned and zeroed at the factory in
this position. They can be used at other angles, but final
spanning and zeroing must be done while transmitter is in
the alternative position.
PRESSURE CONNECTIONS:
A single pressure connec-
tion is provided at the bottom of the transmitter housing.
It has1/4” female NPT and 1/2” male NPT threads. Attach
positive pressure to this port.
MOUNTING
: The Series 634ES Transmitter can be
mounted three ways:
(A) Supported directly by pipe providing pressure.
(B) Attached to a mounting surface with 10-32 x 1/4”
machine screws (included). The machine screws are
installed through the mounting surface into tapped holes
on back of unit.
(C) Mounted with “Z” brackets (included). Attach “Z”
brackets to tapped holes on back of unit and fasten to
front of mounting surface.
ELECTRICAL CONNECTIONS
CAUTION:
DO NOT EXCEED SPECIFIED SUPPLY VOLT-
AGE RATINGS. PERMANENT DAMAGE NOT COVERED
BY WARRANTY WILL RESULT. THIS UNIT IS NOT
DESIGNED FOR AC VOLTAGE OPERATION.
Electrical connections to the Series 634ES Transmitter
are made inside the enclosure. Remove the cover, feed
stripped and tinned leads through the conduit opening
and connect to terminal block screws and -.
See Figure A for locations of terminal block, span and
zero adjust potentiometers. See Figure B (Pg. 3) for
schematic diagram.
FIG. A
An external power supply delivering 12.3 to 35 VDC with
minimum current capability of 40 mA must be used to
power the control loop in which the Series 634ES
Transmitter is connected. See Figure B for connection of
the power supply, transmitter and receiver.
The range of appropriate receiver load resistance (RL) for
the power supply voltage available is given by the formu-
la and graph in Figure C on Pg. 3.
Shielded 2-wire cable is recommended for control loop
wiring, and the cable shielding may be grounded if
desired. Note also that the receiver may be connected in
either the negative or positive side of the loop, whichever
is most convenient.
Should polarity of the transmitter or receiver inadvertent-
ly become reversed, the loop will not function properly,
but no damage will be done to the transmitter.
Series 634ES Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-69ES
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