Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 16)

2-7
SM 04L31A01-01E
Testing
2
Current Output Accuracy
1. Change the mode to setup and choose Control, Control action, and then Input
setting. Set the control mode to Single. Press the ESC key to return to the
preceding menu, and choose Output processing.
2. Set the type of control output to Current-output and analog output to 4-20 mA
for all the loops, save the settings, and change the mode to normal (the cycle
time can be set freely).
3. Press the DISP/ENTER key and choose Control and then Control groups to
display the control display.
4. Choose a loop number to measure with a blue arrow using the arrow keys.
5. Press the MODE softkey, and change the operation mode to manual by
choosing MAN with the up and down arrow keys and pressing DISP/ENTER key
to confirm it.
6. Press the RUN/STP softkey, and start control operation by choosing RUN with
the up and down arrow keys and pressing DISP/ENTER key to confirm it.
7. Press the OUT softkey. Set the output ratio to 0.0% and 100.0% with the up and
down arrow keys and measure each output current with an ammeter or the like.
Verify that the measured currents are within the ranges as shown in the table
below.
Output Ratio Reference Value Allowable Range
0.0% 4 mA 3.984 to 4.016 mA
100.0% 20 mA 19.984 to 20.016 mA
(Load condition: 250 Ω ±1%)
Voltage Pulse Output
1. Choose Output processing by following the procedures in step 1 of “Current
Output Accuracy.”
2. Set the type of control output to Voltage-pulse and the cycle time to 1 second
for all the loops, save the settings, and change the mode to normal (the type of
analog output can be set freely).
3. Change the operation mode to manual and start control operation by following
the procedures of steps 5 and 6 of “Current Output Accuracy.”
4. Press the OUT softkey. Set the output ratio to 20.0% with the up and down
arrow keys and observe the output voltage waveform on an oscilloscope or the
like. Verify that a rectangular waveform is displayed at a 1-second interval (0.2-
second high and 0.8-second low) and 12 V ± 5%.
Control Relay Output
1. Choose Output processing by following the procedures in step 1 of “Current
Output Accuracy.”
2. Set the type of control output to On/Off-control for all the loops, save the
settings, and change the mode to normal (the cycle time and type of analog
output can be set freely).
3. Change the operation mode to manual and start control operation by following
the procedures of steps 5 and 6 of “Current Output Accuracy.”
4. Press the OUT softkey. Set the output ratio to 0.0% and 100.0% with the up and
down arrow keys and verify that the relay outputs are as follows:
Output Ratio NO-C NC-C
0.0% Break Make
100.0% Make Break
2.2 Test Procedures