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IS.PR274/275-00
Typical Applications (wiring diagrams)
Figures 6 and 7 illustrate typical wiring diagrams for the mA output low pressure transducer.
Figure 6.
Wiring mA Output Transducers With an External
DC Power Supply
Figure 7.
Wiring mA Output Transducers Where the Controller or Meter Has
an Internal DC Power Supply
Figures 8 and 9 illustrate typical wiring diagrams for the VDC output low pressure transducer.
Figure 8.
Wiring VDC Output Transducers With an External AC
Power Supply
Figure 9.
Wiring VDC Output Transducers With an
External DC Power Supply
Adjustments
Jumper Configuration
Jumper configuration varies according to the output type of the low pressure transducer. Range
configurations are shown in Table 1. Jumper selections for mA output low pressure transducers
are shown in Figure 10; jumper selections for VDC output low pressure transducers are shown
in Figure 11.
Figure 10.
Jumper Selections for Pressure Transducers
With mA Output
Figure 11.
Jumper Selections for Pressure Transducers With
VDC Output
Checkout
1.
Verify that the transducer is mounted in the correct position.
2.
Verify the appropriate input signal and supply voltage.
3.
Verify the appropriate configuration range.
C
AUTION
!
•
Never connect 120 VAC to the pressure transducer. AC voltage should never be connected
to a transducer intended for a DC power supply.
Transducer Operation
1.
Adjust the pressure to obtain the maximum output signal for the appropriate range.
2.
Ensure that output is either 20 mA or 5 or 10 VDC.
3.
Adjust the pressure to obtain a minimum output signal.
4.
Ensure that output is either 4 mA or 0 VDC.
Note:
This pressure transducer is a highly accurate device. For applications requiring a high degree of
accuracy, use laboratory quality meters and gages.
Calibration
All transducers are factory calibrated to meet or exceed published specifications. If field
adjustment is necessary, follow these instructions:
Calibration of All Pressure Transducers
1.
Connect terminals [+] and [-] to the appropriate power source.
2.
Connect the DVM in series to the [-] terminal.
3.
Apply low pressure to the transducer and carefully adjust the zero trimmer [Z] to obtain the
desired low output pressure.
4.
Apply high pressure to the transducer and adjust the span trimmer [S] to obtain the desired
high output pressure.
5.
Repeat steps 3 and 4 until the transducer is fully calibrated.
Calibration of VDC Output Pressure Transducers Only
1.
Connect terminals [+] and [-] to the appropriate power source. The [-] terminal is also the
negative output terminal.
2.
Connect the DVM on DC volts across the [0] and [-] terminals.
3.
Apply low pressure to the transducer and carefully adjust the zero trimmer [Z] to obtain the
desired low output pressure.
4.
Apply high pressure to the transducer and adjust the span trimmer [S] to obtain the desired
high output pressure.
5.
Repeat steps 3 and 4 until the transducer is fully calibrated.
Maintenance
Perform regular maintenance on the total system to ensure the sustained optimum performance
of the low pressure transducer.
Field Repair
Do not attempt to repair the low pressure transducer. Replace a malfunctioning transducer with
a functional transducer if necessary.
Warranty
See the accompanying data sheet for additional information.
Copyright
©
Mamac Systems 2003. All rights reserved.
Mamac Systems reserves the right to change any specifications without notice to improve the
performance, reliability, or function of our products.
Table 1.
Jumper Range Configurations
Range
A
B
C
D
F
E
G
H
R1
0 to.10
-.05
to.05
—
—
—
—
—
—
R2
—
—
0 to
1.0
0 to.5
0 to.25
-.05
to.05
-.25
to.25
-.125
to.125
R3
—
—
0 to
5.0
0 to
2.5
0 to
1.25
-2.5 to
2.5
-1.25 to
1.25
-.625
to.625
R4
—
—
0 to 30
0 to 15
0 to
7.5
-15.0 to
15.0
-7.5 to
7.5
-3.75 to
3.75
R5
0 to 25
-12.5
to 12.5
—
—
—
—
—
—
R6
—
—
0 to
250
0 to
125
0 to
62.5
-125 to
125
-62.5 to
62.5
-31.25 to
31.25
R7
—
—
0 to
1250
0 to
625
0 to
312.5
-625 to
625
-312.5
to 312.5
-156.25
to 156.25
R8
—
—
0 to
7500
0 to
3750
0 to
1875
-3750 to
3750
-1875 to
1875
-937.5 to
937.5
