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OPERATING INSTRUCTIONS
DIGITAL VOLTmETER mODULE
ITEm NO.: 12 65 05 (DVm-230) Green
ITEm NO.: 12 65 06 (DVm-330) Green
ITEm NO.: 12 65 62 (DVm 230B) Blue
ITEm NO.: 12 65 63 (DVm 230GN) Green negative
ITEm NO.: 12 65 64 (DVm 230RN) Red negative
INTENDED USE
The module is intended for installation in other devices or casings. It displays direct currents ranging from 0 to 200 mV (DC).
By means of individual, external circuits, other physical quantities such as direct current or temperatures can also be displayed.
The measuring units and decimals can be selected. The polarity is automatically displayed.
A display light is integrated; it can be supplied with the operating voltage or with 12 V/DC.
The module must not be operated at voltages greater than 48 V/DC (by an optional volt-age divider). for
a voltage over 48V the respective instructions concerning clearances to air and leakage paths for shock
protection must be complied with. Always observe and adhere to the safe distance for dangerous contact
voltages/wires.
The measuring input must be galvanically separated from the power supply and must not be connected.
The power supply of the module comes from an external 9 V/DC power supply unit. The connection is at the back of the module
in a pin contact strip. You will have to set some soldering links for the selection of the measuring units. There is a data hold
function to "freeze" the measuring value. The product is only to be used in dry indoor locations. !
For safety and approval purposes (CE), you must not rebuild and/or modify this product. If you use the product for purposes
other than those described above, the product may be damaged. In addition, improper use can cause hazards such as short
circuiting, fire, electric shock etc. Read the instructions carefully and keep them. Make this product available to third parties
only together with its operating instructions.
DELIVERy CONTENT
•
Digital voltmeter module
•
Operating instructions
SAfETy INSTRUCTIONS
Read the operating instructions carefully and especially observe the safety information. If you do
not follow the safety instructions and information on proper handling in this manual, we assume no
liability for any resulting personal injury or damage to property. Such cases will invalidate the warranty/
guarantee.
a)
Persons / Product
•
The device is not a toy. Keep it out of the reach of children and pets.
•
Do not leave packaging material lying around carelessly. These may become dangerous playing material for
children.
•
Protect the product from extreme temperatures, direct sunlight, strong jolts, high humidity, moisture, flammable
gases, vapours and solvents.
•
Do not place the product under any mechanical stress.
•
If it is no longer possible to operate the product safely, take it out of operation and protect it from any accidental
use. Safe operation can no longer be guaranteed if the product:
-
is visibly damaged,
-
is no longer working properly,
-
has been stored for extended periods in poor ambient conditions or
-
has been subjected to any serious transport-related stresses.
•
Please handle the product carefully. Jolts, impacts or a fall even from a low height can damage the product.
•
Also observe the safety and operating instructions of any other devices which are connected to the product.
b)
miscellaneous
•
Consult an expert when in doubt about operation, safety or connection of the device.
•
Maintenance, modifications and repairs are to be performed exclusively by an expert or at a qualified shop.
If you are not sure about the correct connection or use, or if questions arise which are not covered by these operating
instructions, please do not hesitate to contact our technical support or another qualified specialist.
Voltcraft®, Lindenweg 15, D-92242 Hirschau, Tel. +49 180/586 582 7.
CONNECTION
a)
Overview of the PCB
All the connections and functional soldering links are made on the back of the
module.
This device can be configured for different voltage ranges, by
soldering resistors to the positions RA and RB.
b)
Selection of the measuring unit
Select the necessary measuring unit and the decimal point you need for your measuring section from the
illustration on the right and set the respective soldering link to "ON". See example drawing.
Please set all the fields you do not need to "OFF", or they cannot be blanked out clearly.
VERSION 12/11
ITEm NO.: 12 65 67 (DVm 230W) White
ITEm NO.: 12 65 68 (DVm 330B) Blue
ITEm NO.: 12 65 70 (DVm 330RN) Red negative
ITEm NO.: 12 65 71 (DVm 330W) White
ITEm NO.: 12 65 98 (DVm 330GN) Green negative
ON
c)
Connection of the pin contact strip CN1
The electric connection of the module is done in the pin contact strip CN1. For the respective functions, please refer to the
following table.
Pin
Description
1
IN HI
2
IN LO
3
VDD
4
VSS
5
BL+
6
BL -
7
HOLD
8
d)
Measuring input "IN HI" and "IN LO"
The measuring input must be galvanically separated from the power supply and must not be connected.
"IN HI" and "IN LO" are differential inputs. They react to the voltage applied and not to the voltage relative to the operating
voltage. Only a direct voltage may be applied as the measurement voltage.
e)
Operating voltage "VDD" and "VSS"
The operating voltage (VDD) must be in the range of 9 V/DC (-0.5 V/+1 V). Do not go below or above this voltage, because the
measuring results would be inaccurate and the module would be destroyed.
If the operating voltage drops below 7 V, the display shows
voltage to the correct value.
f)
Display light "BL+" and "BL-"
The display light can be switched on by applying a voltage of either 9 V/DC or 12 V/DC.
The series resistors for the lights (LEDs) are integrated in the module.
If the operating voltage is to be 9 V/DC, a soldering link must be set at
CN2 (see illustration). It remains open for 12 V/DC.
g)
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.
h)
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 compensate for inaccuracies of external voltage divider resistors.
i)
LCD display test "LKT"
The test connection "LKT" must not be linked for more than 2 seconds, or the module would be
damaged.
The contact "LKT" serves for short-term checks of the display segments. When it is contacted, all the segments are shown
for a check.
j)
Circuit examples
For the circuit examples, please refer to the enclosed sheet with the various application circuits..
TROUBLEShOOTING
Symptom
The LCD shows "1"
The LCD shows "-"
ENTSORGUNG
Electronic devices are recyclable waste and must not be disposed of in the household waste.
At the end of its service life, dispose of the product according to the relevant statutory regulations.
TEChNISChE DATEN
Operating voltage:
Current consumption:
Measurement range:
Display:
Measuring impedance:
Resolution:
Accuracy:
Measuring frequency:
Temperature stability:
Operating temperature:
Display light operating voltage:
Display light current consumption:
Dimensions (W x H x D):
ON
Legal notice
These operating instructions are a publication by Voltcraft®, Lindenweg 15, D-92242 Hirschau/Germany, Phone +49 180/586 582 7
(www.voltcraft.de).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data processing
systems require the prior written approval by the editor. Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in technology and equipment reserved.
© Copyright 2011 by Voltcraft®
Function
Measurement input + (0 - 200 mV/DC)
Measurement input – (reference potential)
Operation voltage +9 V/DC
Operating voltage -
Display light +
Display light -
Data hold (connection to VDD)
Not assigned
"battery". Replace the battery immediately or set the input
Cause
The measurement value is outside the measuring range.
The voltage connected to "IN HI" and "IN LO" is reversed.
Item no.: 12 65 05 / 12 65 62 / 12 65 63 /
Item no.: 12 65 06 / 12 65 68 / 12 65 70 /
12 65 64 / 12 65 67
12 65 71 / 12 65 98
9 V/DC
9 V/DC
2 mA
2 mA
0 - 200 mV/DC
0 - 200 mV/DC
LCD, 1999
LCD, 1999
100 MΩ
100 MΩ
0.1 mV
0.1 mV
±0.5 % + 10 digit
±0.5 % + 10 digit
3 measurements / sec
3 measurements / sec
30 ppm/ ºC
30 ppm/ ºC
0 to + 50 ºC
0 to +50 ºC
9 V/DC
12 V/DC
9 V/DC
15 mA
18 mA
30 mA
48 x 24 x14 mm
72 x 36 x 14 mm
12 V/DC
35 mA
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