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attacked. Additionally, the fumes are explosive and damaging to health.
When cleaning, also use no sharp-edged tools, screwdrivers or metal
brushes or similar.
6.2 A 9 V battery is required to operate the measuring instru-
ment. The battery should be changed when the battery-
change symbol appears in the display. For this, proceed as
follows:
-
disconnect the measuring instrument from the circuit being
measured,
-
remove the test leads from the measuring instrument,
-
switch the unit off and
-
with a suitable cross-head screwdriver, unscrew the fixing screws
at the top centre and at the bottom left and right of the lower
case shell.
-
now carefully lever off the lower case shell.
-
wearing disposable gloves, remove the used battery and dis-
connect it from the connecting clips.
-
taking a new, unused battery, connect the connecting clips to
the correctly-polarised battery and place it in the battery
compartment.
-
having successfully inserted/changed the battery, carefully close
the case again. Take care not to trap the connecting clip leads
during re-assembly.
Attention!
Never operate the measuring instrument in an opened condition! Dan-
ger to life!
Never leave an exhausted battery in the measuring instrument, because
even “leak-proof” batteries can corrode and thereby release chemicals
which can endanger health or destroy the battery compartment.
6.
Note the following if other software is to be used:
The data format is 14 bytes long. The sequence is as follows:
BYTE 1 2 3 4 5 6 7 8 9 A B C D E
Example 1 DC - 3 . 9 9 9 V CR
Example 2 AC 3 9 9 . 9 m V CR
Program example in BASIC simply to read the multimeter:
10 OPEN “COM1:4800, N, 7, 2, RS, CS, DS, CD“ AS #2
20 IN$=INPUT$(14, #2)
30 PRINT IN$
40 CLOSE #2
50 END
Data transfer parameters (communication parameters):
Transfer rate
: 4800 baud (= bps = bits per second)
Character code
: 7-bit ASCII
Parity
: keine
Stop bits
: 2
6. Maintenance, changing the battery, chan-
ging the fuse, positioning the measuring
instrument
6.1 Maintenance
To guarantee the accuracy of the VC 630 / 650 / 670 multimeters long-
term, calibration should be carried out once yearly, possibly in our
service centre (S-2000).
Fitting/changing the battery is described in section 6.2; changing the
fuse is described in 6.3. To clean the unit and its display window and the
test leads, use a dry, clean, lint-free, anti-static cloth.
Attention!
Use no carbonaceous cleaning fluids nor petrol, alcohol or similar for
cleaning, otherwise the surface of the measuring instrument may be
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