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3.1 POWER WIRING
3.2 INPUT SIGNAL WIRING
Before connecting signal wires, the Input Range Jumper should be verified for proper position.
AC Power
Terminal 1: VAC
PAXLV
Voltage Signal (self powered)
PAXLI
Current Signal (self powered)
Terminal 2: VAC
1
2
Terminal 4: + Volts DC/AC
Terminal 4: + Amps DC/AC
115/230
Terminal 3: - Volts DC/AC
Terminal 3: - Amps DC/AC
3
4
3
4
-
V
+
- +
A
2A MAX.
300V MAX.
4.0 S CALING
PAXLV
THE
M ETER
DIRECT VOLTMETER READOUT
When the application requires direct voltmeter readout, the Scale Switch
should remain in the “OFF” position. The Input Range Jumper is set to the
voltage range being applied. It is possible to select a range higher than being
applied to get lower resolution. The Decimal Point switches are set to resolution
of the selected Input Range Jumper.
SCALING VOLTMETER READOUT
In many industrial applications, a voltmeter is required to display a reading
in terms of PSI, RPM, or some other unit of measure. The signal voltage being
measured can be generated by a transducer that senses the variations and
delivers a linear output voltage. To provide the desired readout at the specified
voltage, the voltmeter must be scaled.
Place the Scale Switch in the “ON” position. This enables the Scale
Potentiometer which is accessible from the back of the meter. (Enabling the
Scale Potentiometer does NOT affect the calibration of the meter.) Place the
Decimal Point Switches to the proper location. To properly set the Input Range
Jumper, the Division Factor must be determined by first using the below formula.
After the Division Factor is calculated, use the Division Factor Range Selection
DIVISION FACTOR RANGE SELECTION CHART
D.F. Use Input Position
0.1 to 1.2 Pos 1: 0-1.999 VDC
1.2 to 10.5 Pos 2: 0-19.99
10.5 to 100.5 Pos 3: 0-199.9
100.5 to 1300 Pos 4: 0-300
Note: Only one voltage jumper should be selected. Install the jumper before
the voltage signal is applied.
BLOCK DIAGRAM PAXLV
+VDC
Chart to choose the proper Input Range Jumper setting. Apply the meter power
and the voltage signal. Adjust the Scale Potentiometer to the desired value.
This scaling only effects the span. There is no offset scaling. This means that
only zero voltage can display a value of zero.
+SIGNAL
COMMON
900K
90K
0-1.999V
0-19.99V
0-199.9V
SCALE
POT
DIVISION FACTOR FORMULA:
VT x D.D.P. = D.F.
D.R.
9K
1K
0-300V
S5
1.9.9.9
WHERE:
VT
D.D.P
D.F.
=
=
=
Maximum Transducer Output
Display Decimal Point
Division Factor
S3
S2
S1
S4
D.R.
=
Desired Reading
EXAMPLE : A relative humidity transducer delivers a 7.0 VDC voltage at a
relative humidity of 75%.
D.D.P.
0.000 =
00.00 =
000.0 =
0000 =
1
10
100
1000
The Display Decimal Point
(D.D.P.) is determined by
the desired decimal point
placement in the readout.
D.F. = VT x D.D.P. = 7.0 x 1000 = 93.3
D.R. 75
This Division Factor is between 10.5 and 100.5, therefore jumper position 3
(199.9 V) is selected. The Scaling Potentiometer is then adjusted for the desired
After the Division Factor for the application has been calculated, the proper
voltage range jumper can be selected. Use the “Division Factor Range Selection
Chart” to choose the proper jumper setting.
6
readout at a known relative humidity.
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