Yokogawa PK200 User Manual
Page 21
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
3
0.2kgf/cm
2
0.4kgf/cm
2
0.6kgf/cm
2
0.8kgf/cm
2
1.0kgf/cm
2
4
0.4kgf/cm
2
0.8kgf/cm
2
1.2kgf/cm
2
1.6kgf/cm
2
2.0kgf/cm
2
5
0.2bar
0.4bar
0.6bar
0.8bar
1.0bar
6
0.4bar
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