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CAUTION
Do not exceed specified supply voltage ratings. Permanent
damage not covered by warranty will result. This device is not
designed for 120 or 240 volt AC operation. Use only on 10-28 VDC.
INSTALLATION
1. Location: Select a location where the temperature of the transducer will be
between -4 and 176°F (-20 to 80°C) for ETFE cable or -4 and 149°F (-20 to 65°C) for
polyurethane cable. Distance from the receiver is limited only by total loop resistance.
2. Position: The transducer is not position sensitive. However all standard models are
originally calibrated with the unit in a position with the diaphragm downward. Although
they can be used at other an gles, for best accuracy it is recommended that units be
installed in the position calibrated at the factory.
3. Mounting: The transducer can be mounted via several methods. It can be
suspended from the electrical cable, it can be placed resting on the bottom of the tank
in either horizontal or vertical orientation, or it can be attached to a pipe or hang wire
by the 1/2˝ NPT male connection on the top of the housing.
4. Wire Length: The maximum length of wire connecting the transducer and receiver
is a function of wire size and receiver resistance. Wiring should not contribute more
than 10% of the receiver resistance to total loop resistance. For extremely long runs
(over 1000 feet), choose receivers with higher resistance to minimize the size and cost
of connecting leads. Where wiring length is under 100 feet, wire as small as 22 AWG
can be used.
5. Wiring: An external power supply delivering 10-28 VDC with minimum current
capability of 40 mA DC (per transducer) is required to power the control loop. See
Figure A for connection of the power supply, transducer and receiver. The range of
appropriate receiver load resistance (RL) for the DC power supply voltage available is
expressed by the formula:
RL Max = Vps – 10 V
20 mA DC
Shielded cable is recommended for control loop wiring.
RED
PRESSURE
BLACK
TRANSDUCER
Black wire is negative (-) and red wire is positive (+) in Figure B.
TERMINAL 4 (-)
BLACK (-)
POWER
SUPPLY
10-28 VDC
mA
RECEIVER
-
Figure A
RED (+)
Figure B
MAINTENANCE
After final installation of the pressure transducer and its companion receiver, no routine
maintenance is required. A periodic check of system calibration is suggested. The
Series PBLTX transducers are not field repairable and should be returned if repair
is needed (field repair should not be attempted and may void warranty). Be sure to
include a brief description of the problem plus any relevant application notes. Contact
customer service to receive a return goods authorization number before shipping.
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