Voltage of the system does not exceed 1000 V.
—
Make the measuring circuit connections mechanically strong and secure so
that they do not accidently open. The conductor cross sections and
connection points should be designed to avoid excessive heating.
—
On the 300mA and 10A ranges, an intermittent sound signal warns you,
when the measured value exceeds the upper range limit.
—
The current measuring ranges upto 300 mA are protected to a short circuit
current of 25 A by a fuse FF 1.6/1000V in conjunction with power diodes.
The cutout capacity of the fuse is 10 kA at a rated voltage of 1000 V and
ohmic load.
—
The current measuring ranges up to 10A are protected by a 16A/1000 V
fuse. The cut-out capacity of the fuse is 30kA at a nominal voltage of 1000
V and ohmic load.
—
A blown fuse is signaled on the LCD the instant a measured quantity having
a voltage of more than 4V is applied to the corresponding connection
sockets. Then, the digital display (9) shows the word “FUSE”.
—
After a fuse has blown, eliminate the cause of the overload before using the
meter again!
—
Replacement of the fuses is described in section “18. Maintenance”.
AC current measurement with (clip-on) current transformers
See appendix section 20.1.
9. Resistance measurement and continuity test
î
Verify that the device under test is electrically dead. External voltages
would falsify the measured result !
î
Set the function selector switch (6) to “
W
”.
î
Connect the device under test as shown.
î
Zero adjustment on the measuring ranges 300
W
to 3 k
W
When measuring small resistance values on the 300
W
and 3k
W
range, you
can eliminate the resistance of the leads and transient resistances by zero
adjustment:
î
Connect the test leads to the meter and join the free ends.
î
Briefly press the yellow multi-function pushbutton (5).
The meter acknowledges zero adjustment by sound signal, the LCD
shows “000,00” (+1 digit) and the symbol “ZERO” (18) is displayed. The
resistance measured the instant the pushbutton is pressed is used as
reference value (max. 2000 digits). It is automatically deducted from the values
measured thereafter.
You can clear the zero adjustment
- by pressing the yellow multifunction pushbutton (5) for a long time,
clearance is acknowledged by the buzzer sounding twice,
- by switching the instrument off.
Continuity test with buzzer
With “buzzer” function activated, the meter issues a continuous sound signal
below 100.00 on the 300.00 range only.
í
To switch buzzer ON:
Select range 30k
W
, 300k
W
, 3M
W
, or 30M
W
, through manual mode and briefly
press the yellow multi function key(5). The meter will show “cont.n” on display.
Press “AUTO/MAN” key. The meter will show “cont.y” on display.
Now press the yellow key(5) again. The symbol (20) appears on the display
when 300.00
W
range is selected.
í
To switch buzzer OFF:
Select range 30k
W
, 300k
W
, 3M
W
, or 30M
W
, through manual mode and
briefly press the yellow multi function key(5). The meter will show “cont.y”
on display. Press “AUTO/MAN” key. The meter will show “cont.n” on display.
Now press the yellow key(5) again. The symbol (20) disappears on the
display when 300.00
W
range is selected.
Summary of Contents for Gamma 10
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