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 to 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 pressure connection
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. Electrical Connections
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 Fig. 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 – 10V
20 mA DC
Shielded cable is recommended for control loop wiring.
Black wire is negative (-) and red wire is positive (+).
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 SBLTX transducer 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.
POWER
SUPPLY
10-28 VDC
-
RECEIVER
BLACK
RED
PRESSURE
TRANSDUCER
mA
Fig. A
Fig. B
Содержание SBLTX Series
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