YOKOGAWA WT210, User Manual, Page: 282 / 316

15-4
IM 760401-01E
9. Press The SHIFT key and display C will change to “rAnGE”. This completes the
range adjustments. When you press the RESET key instead of the SHIFT key,
the carried out adjustments will become invalid.
• In case the External Sensor Input Option is installed (/EX1 or /EX2)
1.
Connect the voltage output terminal of the AC voltage/current standard to the
voltage input terminal of the WT210/WT230. Connect the H terminal of the
standard to the core of the EXT terminal of the WT210/WT230 and the L
terminal to the shield of the EXT terminal of the WT210/WT230. On the WT230,
the core of the EXT terminals and the shield of the EXT terminals of all input
elements are connected collectively.
2. In step 2 of “Preparations” described earlier, select “Ein” and press the ENTER
key. Display B shows the external sensor range “E 10.00” V (or “E200.0” mV).
3. Set the output voltage of the standard to 10.000 V (or 200.00 mV) and output
the signal.
4. Wait for the measured value on display C to stabilize. Even in stable condition,
the value fluctuates up to approximately
±
2 digits.
The displayed value when using external sensor input is a value converted to
current. If a voltage value that is equal to the specified external sensor range is
input, display C shows the rated range of 50.000 A (assuming that there is no
error in the WT210/WT230 or the standard).
5. Press the ENTER key. The adjustment value is confirmed.
6. Press The SHIFT key and display C will change to “Ein”. This completes the
external sensor input adjustments. When you press the RESET key instead of
the SHIFT key, the carried out adjustments will become invalid.
Adjusting the D/A Output
• Preparations
1.
Connect the D/A output terminal (pin) corresponding to channel 1 of the external
I/O connector to the H terminal of the DMM and the COM terminal (pin No. 24)
to the L terminal. For the relationship between the D/A output terminals and the
D/A output channels, see “Pin Assignments” in section 9.1.
2. Set the DMM range to 20 V.
3. In step 2 of “Preparations” on page 15-1, select “dA” and press the ENTER key.
• Adjusting
After having carried out the above described preparations, the displays will show the
following. Display A will be blinking.
display A: ch 1
display B: 5.000
display C: 5.0000
1. Press the
∧
or
∨
key to select the channel to be adjusted shown on display A.
2. Press the ENTER key. The first digit on display C starts blinking. A voltage of
approxi5 V is output from the external I/O connector.
3. Press the VOLTAGE or CURRENT key to move the blinking digit on display C
and press
∧
or
∨
key to set the value of the blinking digit the same as the value
displayed on the DMM.
4. After setting all the digits on display C, press the ENTER key. Display C shows
“–5.0000” V and a voltage of approximately –5 V is output from the external I/O
connector.
5. Repeat step 3.
6. After setting all the digits on display C, press the ENTER key.
7. The channel shown on display A changes from “ch1” to “ch2.”
8. Reconnect the D/A output terminal that is connected to the DMM to the terminal
(pin) corresponding to channel 2. Make sure the output terminals do not come
in contact with each other or the conductive parts of the terminal to come in
contact with other objects.
15.1 Adjustments