Advertenties
Beschikbare talen
Beschikbare talen
C) Continuity test
With this function voltage-free leads, fuses, circuits etc. can be acou-
stically checked for continuity. This measurement is performed as fol-
lows:
1. Position the rotary switch to (•).
2. Connect the red test lead to the V/Ohm socket (+) and the black test
lead to the COM socket (-).
3. Then connect the test probes to the points of measurement.
Attention!
Measure no charged capacitors, because otherwise the measuring
instrument can be destroyed by a possible discharge.
D) Resistance measurement
Attention!
Ensure that all components, circuits, chips and other objects to be mea-
sured, are completely voltage-free.
1. Set the measurement function switch to resistance measurement
(OHM).
2. Connect the red test lead to the V/Ohm socket (+) and the black test
lead to the COM socket (-).
3. Now connect the measuring probes with the test object.
The resistance of the test leads can normally be ignored (approx. 0.1
to 0.2 Ohm). However, this low value can lead to inaccuracies in the
lowest measurement range.
Using the "REL" function, this resistance can be "subtracted" to
compensate for these "measurement errors", i.e. the display refe-
renced and set to "0".
When a resistance measurement is performed, ensure that the test
points which you touch with the test probes during measurement
are free from dirt, oil, solder flux or similar. Such conditions can fal-
sify the measured value.
36
With resistances greater than approx. 4 MOhm the display can
require some time to become stabilised.
As soon as "OL" appears in the display and the bar graph flashes,
the measurement range has been exceeded and the measurement
path is interrupted.
E) Inductance measurement
For the measurement of inductance proceed as follows:
1. Set the rotary switch to "400 mH".
2. Measurements can now be performed with the test socket on the
measuring instrument. The "R-H" function can be used to switch to
and fro manually between two measurement ranges. If the "R-H"
function is not set, the measuring instrument automatically sets its-
elf to Auto Range.
Attention!
With inductance measurements, make sure without fail that the coil and
the circuit, to which it may be connected, is absolutely voltage-free. Any
capacitors present must be discharged.
F) Capacity measurement
For the measurement of capacities proceed as follows:
1. Discharge each capacitor before connecting it to the measuring
instrument.
Attention!
When short-circuiting capacitors, high-energy discharges can occur.
Caution: danger to life!! Do not touch capacitor connections with volta-
ges greater than 35 VDC and 25 VAC. Take care in environments in which
dust, inflammable gas, steam or liquids are present or can occur. ==>
Danger of explosion!
2. Set the measurement function switch (8) to "CAP".
3. Measurements can now be performed with the test socket on the
measuring instrument.
With polarised capacitors, observe the correct polarity.
G) Using the analogue bar graph
The bar graph is easy to operate and understand. It is comparable with
37
Advertenties
Hoofdstukken
