Printed in Slovenia
•
Subject to change without notice
•
Version 02 / Sep. 2006
•
22.600.718
1.
Check and correct, if necessary, the zero position of the pointer
when the instrument is switched off. After cleaning the transparent
window, eliminate eventual static electrification with a contact or
a humid mop.
2.
Set the ratings selector switch to the required rating. When
measuring current and voltages start at the highest rating and then
change over to the corresponding lower rating. The circuit is not
interrupted. Be careful about upper limits of ratings as well as
correct polarity of terminals. After the measurement set the
selector switch to the highest voltage rating.
3.
Set zero on ohmic ratings at short circuited terminals COM and 50
µ
A, 100 mV, A,
Ω
.
4.
Consider more detailed instructions in the following chapters for
meter connection.
9.
MEASURING INSTRUCTIONS
9.1
MEASUREMENT OF DC VOLTAGES
9.1.1
Direct measurement of voltage up to 600 V (20 k
Ω
/V)
Ratings selector switch:
600 V … 1 V
DC
Reading: a black scale V, A
DC
9.2
MEASUREMENT OF DC CURRENTS
Connect the instrument in series with the user into the conductor
which has lower voltage towards earth. For safety’s sake this voltage
should not exceed 600 V.
9.2.1
Direct measurement of currents up to 1 A and voltage
100 mV
Ratings selector switch:
1 A … 50
µ
A, 100 mV
Reading: a black scale V, A
DC
9.3
MEASUREMENT OF AC VOLTAGES
9.3.1
Direct measurement of voltages up to 600 V
Ratings selector switch:
600 V … 10 V
AC
Reading: a red scale
9.3.2
Measurement of amplification (weakening) in decibels
The dB scale enables you a direct finding of amplification
(weakening) at voltage measurement on four-poles. Amplification or
weakening is proportional to logarithm ratio of voltage square at input
and output of a four-pole in decibels (dB). The values in dB are
marked with a positive sign for amplification, and with a negative sign
for weakening.
A decibel scale is correspondingly divided into positive and negative
values from a starting point 0 dB (level 0). The starting point 0 dB is
defined with 0.775 V voltage according to the international standards.
Voltages are measured by the described method of measuring AC
voltages. At 10 V rating the decibels are read directly, while at other
ratings the rating constant should be added up to the read value by the
table:
Rating
(V)
10 30 100 300 600
Constant
0 +10 +20 +30 +40
9.4
MEASUREMENT OF AC CURRENTS
Connect the instrument in series with the user always into the
conductor with lower voltage towards earth. For safety’s sake this
voltage should not exceed 600 V.
9.4.1
Direct measurement of currents up to 3 A
Ratings selector switch:
3 A … 3 mA
AC
Reading: a red scale V, A
AC
At measurement at 3 A rating, the measurement should last max. 1
minute.
At measurement at 3 mA rating, the circuit resistance should be min.
150 k
Ω
.
9.4.2
Measurement of current by means of a clamp-on meter
For measurement of AC current without interruption use a clamp-on
meter.
Ratings selector switch:
regarding the ratio
Reading: red scale V, A
AC
Consider all instructions for measurement with the clamp-on meter.
9.5
MEASUREMENT OF RESISTANCE
Periodically check the battery condition and replace a used up battery
in due time. Before the measurement of resistance always make sure
that there is no voltage on the measured resistor. Capacitors should be
discharged.
At transition to another rating, set the pointer to a final tilt (0 on
Ω
scale). When testing the semiconductor, the battery positive pole
should be on COM socket.
In
Ω
x 1 range the battery is extremely loaded, therefore the
measurement should be as short as posible.
Ratings selector switch:
Ω
x 1 …
Ω
x 100
Reading:
Ω
scale
Short circuit COM plug-in sockets and 50
µ
A, 100 mV, A,
Ω
and set
the pointer to the final tilt (0 on
Ω
scale) with a knob.
10.
MAINTENANCE
A special maintenance is not required. Periodically check the battery
condition and voltages. A used up battery should not be left in the
meter. The battery contacts should be clean and should have a reliable
contact. If the instrument is not used for a longer period of time, take
the battery out of the meter.
10.1
REPLACEMENT OF A BATTERY AND A FUSE
Carefully remove the rubber border. Remove the base by pressing the
locking ring in the middle of connection sockets on the meter rear side
with a screwdriver or a similar tool. The meter should be
DISCONNECTED when removing the rubber border and the base!
Replace the battery and the fuse.
10.2
CLEANING
To clean the instrument use a soft mop and a brush. Eventual static
electrification of the window which could influence in the
measurement should be removed with an anti-static coating. Remove
the residue of electrification contact or a humid mop. Use alcohol to
clean dirt.
11.
REPAIR AND SERVICING
Please contact an authorised service for repair, servicing and purchase
of spare parts.
