Technical Data - VOLTCRAFT DVM 320 Bedienungsanleitung

Data-Hold "HOLD"
The value currently displayed is frozen by contacting the "HOLD" (pin 7) to "VDD" (pin 3). The
value will remain in the display until the contacts are removed.
D) Internal reference voltage "VR1"
The internal reference voltage is set with VR1. The voltage has been calibrated to 100.0 mV
in the factory, it can be adjusted according to the respective application, for example to make
good for inaccuracies of external voltage divider resistors.
E) LCD display test "LKT"
The contact "LKT" serves for short-term checks of the display segments. When it is contacted,
all the segments are shown for a check.
The test connection "LKT" must not be linked for more than 2 seconds, or
the module would be damaged.
Circuit examples
Voltage measuring range
This device can be configured for different voltage ranges, by soldering resistors to the
positions RA and RB.
For this module, a 0-Ohm resistor is installed for RA, which must be removed before RA and
RB can be modified.
RA & RB
For the respective resistance values please refer to the enclosed sheet with the various
application circuits.
For an accuracy of 0.5%, please use 0.5% resistors.
If the required accuracy is less, you can deviate from this rule.
Disposal
Used electronic devices are raw materials and must not be disposed of in the

domestic waste.
When the module has reached the end of its service life, please dispose of it
according to the current statutory requirements at your local collecting site. It is
forbidden to dispose of them in the household rubbish!

Technical data

DVM 220
Operating voltage 9 V/DC
Current consumption 2 mA
Measuring range 0 - 200 mV/DC
Display LCD, 1888
Measuring impedance 100 MOhm
Definition 0.1 mV
Accuracy 0.5 % ± 1 digit
Reading frequency 3 measurements/sec
Temperature stability 30 ppm/°C
Operating temperature 0 to +50 °C
Display light
operating voltage 9 V/DC
Display light
current consumption 15 mA
Dimensions See enclosed sheet, "dimensions"
DVM 320
9 V/DC
2 mA
0 - 200 mV/DC
LCD, 1888
100 MOhm
0.1 mV
0.5 % ± 1 digit
3 measurements/sec
30 ppm/°C
0 to +50 °C
12 V/DC 9 V/DC 12 V/DC
18 mA 30 mA 35 mA
These operating instructions are published by Voltcraft®, Lindenweg 15,
D-92242 Hirschau/Germany, phone +49 (0) 180 / 586 582 723 8.
These operating instructions reflect the current technical specifications at time of
print. We reserve the right to change the technical or physical specifiations.
© 2006 by Voltcraft®. Printed in Germany.