66
15-3-2 Fine adjustment of zero and span
Note on using this function
Use this mode only when adequate accuracy can not be obtained by the regular
scaling set in function modes
f-34
and
f-35
. This mode uses the internal
correction factor and requires a high-precision digital multimeter. If a low-precision
multimeter is used, it may adversely affect the indicator performance and the output
voltage accuracy.
Zero and span adjustment of the AD-4532B DAV/DAI are not performed
externally but internally in a digital manner. Voltage is used for adjustment.
The adjustment points are 0 V, +10 V and -10 V. For current adjustment,
adjust to 4 mA at 0 V and 20 mA at +10 V.
This mode will be displayed only when the DAV/DAI option is installed.
1. In the measurement mode, press the FNC key for three seconds or
more to enter the function selection mode.
2. Press the > key several times to display
0p-da
.
3. Press the
↵
key to enter the DAV/DAI adjustment mode.
4. In the main display,
dav 0v
appears, indicating that the 0-V fine
adjustment mode is selected. And in the right side of the sub-display,
the output digital value appears. Connect the digital multimeter to
the DAV output terminal. Use the following keys to adjust the output
voltage while looking at the digital multimeter.
To adjust the current value, connect the digital multimeter to the DAI
output terminal. Use the following keys to adjust the output current
to 4 mA at 0 V and to 20 mA at +10 V while looking at the digital
multimeter.
1
>
Switches the adjustment points among 0 V, 10 V and –10 V.
1
∧
Increases the output voltage (or current) value.
When kept pressed, increases the value by ten.
1
∨
Decreases the output voltage (or current) value.
When kept pressed, decreases the value by ten.
1
↵
Saves the adjusted value.
ESC Cancels the operation and returns to the
0p-da
1
display.
FNC
3 seconds
4532
1000 400
fnc
0p-da
dav 0v
valUe 32768
dav 0v
valUe 32496
------
valUe 32496
dav 0v
valUe 32496
0p-da
ESC
ESC
