
Outputs and Digital Input
Configuring Analog Output
VT200/220 Technical Manual, Rev 1.00.01
69
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#
TM-VT200/220-EN
Par. Description
Values
A.3
Error output level
. Specifies whether scale errors should be
indicated as a low or high signal.
0 = Low (0mA)
1 = High (24mA)
A.4
Current / voltage
. This parameter must correspond to the
hardware jumper, which defines whether output should be in
current or voltage (see section
7.4.1).
0 = Current
1 = Voltage
A.5
Net / gross
. Specifies whether the indicator should always
output gross weight, or output net weight when tare is active.
0 = Net weight
1 = Gross weight
A.6
Effective Range for current output
. Sets the range to 0-
20mA or 4-20mA. Relevant only if A.4 and the hardware
jumper are set to current.
0 = 0-20mA
1 = 4-20mA
A.7
Resolution
. Specifies whether output should be in high
resolution if the display is showing high resolution.
0 = Display
1 = Internal
A.8
Operation
. Enables and disables the analog output.
0 = Disabled
1 = Enabled
7.4.3
Calibrating D/A Converter
To calibrate D/A converter (0-10V):
1. Place jumper JP1 on PCB (761) for voltage output.
2. Power up the unit, enter the setup menus and enter the
ACAL
menu.
3. Set parameters as follows:
A.1
=1;
A.2
=0;
A.3
=0;
A.4
=1;
A.5
=0;
A.6
=0;
A.7
=1;
A.8
=1.
4. Skip D/A calibration and save the above settings by selecting
STORE
.
5.
Access the function menu and select function 85 (see 3.3.1).
6.
The display shows
C 00000
. Enter 65535. Press
to output the value.
7.
Use a voltmeter to measure the voltage at pins 2 (+) and 3 (-) of the analog
output connector (J4). Record the value (in volts). Calculate a new value, which is:
100/recorded value. E.g. Recorded value is 9.94, new value is 100/9.94=10.06.
This is the
full scale voltage.
8.
Exit Fn 85 and re-enter the
ACAL
menu.
9. Set parameter
A.1
to 1. The calibration dialog starts.
10. When prompted for D/A Zero, enter 00.000.
11. When prompted for D/A Span, enter the
full scale voltage
you calculated in step 7.
12. When you finish stepping through the dialog, exit the
ACAL
menu.
13. Select
STORE
to save your settings.