<5.
Operation
>
5-2
IM 21B03D01-01E
<Example: 20 to 100 kPa output signal for 4 to
20 mA input signal>
Adjust the zero adjustment so that an output signal
of 20kPa is obtained when a 4mA input signal is
applied.
Table 5.2
Output Signals
Output Signal Code
Output Signal
1
20 to 100 kPa
2
40 to 200 kPa
3
0.2 to 1.0 kgf/cm
2
4
0.4 to 2.0 kgf/cm
2
5
0.2 to 1.0 bar
6
0.4 to 2.0 bar
7
3 to 15 psi
8
6 to 30 psi
9
3 to 27 psi
Zero adjustment
F0502.ai
Figure 5.2
Zero Point Adjustment Mechanism
5.3 Calibration
CAUTION
Always perform calibration in a non-hazardous
area.
(1) For the model with A/M selector switch, please
set the A/M selector switch to A (Auto). (Turn
the switch counterclockwise.)
(2) Remove the converter cover.
WARNING
For flameproof specifications or intrinsically safe
explosion-proof specifications, first conduct a
gas detector check to confirm that there is no
explosive gas in the area.
(3) Apply supply air pressure to the current-to-
pneumatic converter.
For supply air pressure, see the data plate or
Table 5.3 “Supply Air Pressure.”
Standard output applies for model suffix output
signal code “1, 3, 5, 7” and multiplied pressure
output for model suffix output signal code “2, 4,
6, 8, 9.”
Table 5.3
Recommended Supply Air Pressure
Output
Signal Code
Output Signal
Supply Air
Pressure
1
20 to 100 kPa
130 to 150 kPa
2
40 to 200 kPa
230 to 260 kPa
3
0.2 to 1.0 kgf/cm
2
1.3 to 1.5 kgf/cm
2
4
0.4 to 2.0 kgf/cm
2
2.3 to 2.6 kgf/cm
2
5
0.2 to 1.0 bar
1.3 to 1.5 bar
6
0.4 to 2.0 bar
2.3 to 2.6 bar
7
3 to 15 psi
19 to 22 psi
8
6 to 30 psi
34 to 37 psi
9
3 to 27 psi
34 to 36 psi
(4) Then input a 0% input signal.
Apply 4 mA for 4 to 20mA input or 10mA for 10
to 50mA input.
Control the zero adjustment so that the output
air pressure reaches the specified pressure.
For 0% output air pressure, see the data plate
or Table 5.4 “Output Signals.”
To increase output air pressure, turn the
zero adjustment clockwise. To decrease
the pressure, turn the zero adjustment
counterclockwise.
For the model with reverse action (/RA),
please turn zero adjustment counterclockwise
to increase output air pressure. To decrease
output air pressure, please turn zero adjustment
clockwise.
三千控制阀网
www.cv3000.com
