Manual

IM 21B03D01-01E
5-3
5. OPERATION
For the model with reverse action (/RA), please
turn span adjustment counterclockwise to increase
output air pressure. To decrease output pressure,
please turn span adjustment clockwise.
Zero adjustment
F0502.EPS
Figure 5.2 Zero Point Adjustment Mechanism
(6) Input a 0% input signal.
Confirm if 0% output air pressure reaches the
specified pressure. If not, make zero point adjust-
ment.
(7) Input a 100% input signal
Confirm if 100% output air pressure reaches the
specified pressure. If not, make span adjustment.
(8) Repeat steps (6) and (7) two to three times to
adjust the zero point and span.
(9) After completing adjustments, change the input
signal to 0%, 25%, 50%, 75%, and 100% and
confirm if the specified output is reached at the
relevant input.
Confirm the accuracy with reference to the input
and output signal reference values given in Table
5.5 “Input and Output Signals.”
Zero adjustment
F0503.EPS
Span adjustment
Figure 5.3 Span Adjustment Mechanism
<Example: For 20 to 100 kPa output signal at 4
to 20 mA input signal>
Calibrate the input and output signals with reference to
Table 5.6. Accuracy should be within ±0.5% of span.
Table 5.6 Input and Output Signals
Input Signal Output Signal
0% 4mA 20kPa
25% 8mA 40kPa
50% 12mA 60kPa
75% 16mA 80kPa
100% 20mA 100kPa
T0506.EPS
Table 5.5 Input and Output Signals
4 to 20mA 4mA 8mA 12mA 16mA 20mA
(20mA) (16mA) (12mA) (8mA) (4mA)
10 to 50mA 10mA 20mA 30mA 40mA 50mA
(50mA) (40mA) (30mA) (20mA) (10mA)
Output Signal 0% 25% 50% 75% 100%
1 20kPa 40kPa 60kPa 80kPa 100kPa
2 40kPa 80kPa 120kPa 160kPa 200kPa
30.2kgf/cm
2
0.4kgf/cm
2
0.6kgf/cm
2
0.8kgf/cm
2
1.0kgf/cm
2
40.4kgf/cm
2
0.8kgf/cm
2
1.2kgf/cm
2
1.6kgf/cm
2
2.0kgf/cm
2
50.2bar 0.4bar 0.6bar 0.8bar 1.0bar
60.4bar 0.8bar 1.2bar 1.6bar 2.0bar
7 3psi 6psi 9psi 12psi 15psi
8 6psi 12psi 18psi 24psi 30psi
9 3psi 9psi 15psi 21psi 27psi
Input Current of the model with / RA is shown in ( ).
Input
Output
Signal
T0505.EPS