c) Diode test
Make sure that all the circuit parts, switches and components and other objects of measurement are
disconnected from the voltage at all times.
Select the measuring range
• Check the measuring leads for continuity by connecting both measuring prods to one another.
After that the value must be approx. 003.
• Now connect the two measuring prods with the object to be measured (diode).
• The display shows the continuity voltage in Millivolt (mV). Usual voltage values: silicon diode
ca. 700 mV, germanium diode ca. 250 mV). If „1“ is indicated, the diode is measured in reverse
direction or the diode is faulty (interruption).
•
After you finish testing, always switch the measuring device off. Turn the rotary switch to „OFF“.
d) Battery test
With the two measuring ranges, you can test all batteries and accumulators with a nominal voltage of 9 V/1.5V or 1.2 V. The
cells are slightly charged during testing, which corresponds to actual operation.
Select the respective measuring range
.
For 1.2 V accumulators, select the 1.5 V range
• Connect the red measuring tip with the positive pole and the black measuring tip with the negative pole.
• The contact voltage of the battery/accumulator is indicated on the display.
With new batteries or completely charged accumulators, the contact voltage is slightly higher than the stated nominal
voltage.
•
After you finish testing, always switch the measuring device off. Turn the rotary switch to „OFF“.
e) Rectangular signal generator
In this range, the DMM works as a rectangular generator for testing audio switching or similar. In this measuring range, the
measuring tips carry a signal of 65
±
5 Hertz and an amplitude of 3 Vpp.
Do not short-circuit the measuring cables in this measuring range.
Select the measuring range .
• Connect the two measuring tips with the measuring object (red = signal, black = reference mass).
•
After you finish testing, always switch the measuring device off. Turn the rotary switch to „OFF“.
f) Direct current measuring A
Current measuring is possible in three ranges from 0 to 200 mA. All current measuring ranges are provided with fuses and thus
protected against overload.
Proceed as follows to measure DC voltages:
•
If you want to measure currents up to max. 2000 μA, set the rotary switch to the position „2000μA“
or the matching measuring range.
• Now connect the two test prods in series with the object to be measured (battery, circuit etc.); the
display indicates the polarity together with the currently measured value.
Never measure currents above 200 mA in the μA/mA range, since this would cause the fuse to trip. The
voltage in the measuring circuit may not exceed 250 V. In current measuring range the two test prods have
a low-impedance connection. Merely touching a metal end poses the risk of an electric shock.
If measuring is no longer possible (measuring value does not change, etc.), the internal fuse may have been
triggered. See the next chapter to read about replacing the fuse.
•
After you finish testing, always switch the measuring device off. Turn the rotary switch to „OFF“.
MAINTENANCE AND CLEANING
The safety instructions below must be observed before the device is cleaned or maintained:
Live components may be exposed if the covering is opened or components are removed. The connected
lines must be disconnected from all measuring objects prior to cleaning or repairing the device.
Do not use scrubbing agents or chemical agents containing petrol, alcohol or the like to clean the product. These could corrode
the surface of the measuring instrument. The fumes are furthermore a health hazard and are explosive. Moreover, you should
not use sharp-edged tools, screwdrivers or metal brushes or similar for cleaning.
To clean the device, the display or measurement lines, use a clean, dry lint-free anti-static cleaning cloth.
REPLACING THE FUSE
If no measurement data is shown on the display, the fuse is probably defective. The fuse is integrated in the red test prod in a
user-friendly position. To replace the fuse, proceed as follows:
FUSED 0,5A F CAT 250V
FUSED 0,5A F CAT 250V
FUSED 0,5A F CAT 250V
Turn off the measuring instrument and remove both test prods from the device under test.
Unscrew the front end of the red test prod from the reaching area of the hands.
Replace the defective fuse with a fuse of the same type and nominal current (quick-acting 0.5 A/250 V fine-wire fuse).
Carefully screw the red test prod back together.
INSERTING/CHANGING THE BATTERIES
Operation of the measuring device requires two button cell batteries (LR44 or identical). A battery replacement is required when
the display becomes weaker.
To insert/replace the battery, proceed as follows:
• Disconnect the measuring device from the measuring circuit and turn it off.
• Loosen the casing screw on the rear and open the casing.
• Place new batteries into the battery compartment observing the correct polarity. Always observe the indicated polarity.
• Now, close the cover carefully again.
Never operate the measurement device when it is open. !RISK OF FATAL INJURY! Do not leave flat batteries
in the device. Even batteries protected against leaking can corrode and thus release chemicals which may
be detrimental to your health or destroy the battery compartment. Do not leave batteries lying around
carelessly. They might be swallowed by children or pets. If swallowed, consult a doctor immediately. If the
device is not used for longer periods of time, remove the batteries in order to prevent leaking. Leaking or
damaged batteries may cause alkali burns if they come in contact with the skin. It is therefore advisable to
use suitable protective gloves. Make sure that the batteries are not short-circuited. Do not throw batteries
into fire! Batteries may not be recharged. Danger of explosion!
Suitable replacement batteries are available under order number 652044 (order 1 set of 2).
DISPOSAL
a) Product
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.
Remove any inserted (rechargeable) batteries and dispose of them separately from the product.
b) (Rechargeable) batteries
You as the end user are required by law (Battery Ordinance) to return all used batteries/rechargeable batteries. Disposing of
them in the household waste is prohibited.
Contaminated (rechargeable) batteries are labelled with this symbol to indicate that disposal in the domestic
waste is forbidden. The designations for the heavy metals involved are: Cd = Cadmium, Hg = Mercury, Pb = Lead
(name on (rechargeable) batteries, e.g. below the trash icon on the left).
Used (rechargeable) batteries can be returned to collection points in your municipality, our stores or wherever
(rechargeable) batteries are sold..
You thus fulfil your statutory obligations and contribute to the protection of the environment.
TROUBLESHOOTING
In purchasing the DMM, you have acquired a product which has been designed to the state of the art and is
operationally reliable. Nevertheless, problems or faults may occur. For this reason, the following is a description of
how you can eliminate possible malfunctions yourself.
Always adhere to the safety instructions!
Error
Possible cause
The multimeter
does not function.
Are the batteries spent?
Check the status.
No measuring value
change.
Is the wrong measuring function active?
The internal overload fuse is defective.
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.
TECHNICAL DATA
2000 counts
Display
2.5 measurements per sec.
Measuring frequency
>1 MΩ
Input resistance
3 V/DC (2 x LR 44 or identical)
Operating Voltage
Operation: 0°C to 40°C, max. 80 % rel. air humidity (non-condensing)
Ambient conditions
103 x 52 x 27 (mm)
Dimensions (LxWxH)
ca. 80 g
Weight
Measurement tolerances
Statement of accuracy in ± (% of r display error in counts (= number of smallest points)). The accuracy is valid for
one year at a temperature of +23°C ± 5°C, and at a relative humidity of less than 75 %, non-condensing. The warming-up
time is about 1 minute.
Accuracy
Measuring range
Type of operation
±(1.5% + 2 counts)
200 mV
Direct voltage
±(2.5% + 2 counts)
2000 mV - 250 V
±(2.5% + 9 counts)
200 - 250 V
Alternating voltage
50 Hz
±(2.5% + 9 counts)
2000 µA - 200 mA
Direct current
±(2.5% + 5 3 Ohm)
200 Ohm - 2000 kOhm
Resistance
Diode test. . . . . . .. . .. . .. .
Test voltage: 1,3 V / test current 0,9 mA
Battery test. . . . . . .. . .. . ..
50 mA load current in 1.5 V range
5 mA load current in 9 V range
Max. input sizes/overload protection
250 VDC or VACrms (rms = effective)
Voltage measurement
max. 200 mA DC, max. 250 VDC
Current measurement
Fine fuse 5 x 20 mm (F500mA/250V)
Quick-acting 500 mA, 250 V. May only be exchanged by an expert.
Overload protection
Do not exceed the maximum permitted input values. Do not touch any circuits or parts of circuits, if they
can have higher voltages than 25 V Acrms or 35 V DC. Mortal danger!
Regularly check the technical safety of the device and the measuring cables, e.g. for damage to the casing
etc. Do not use the measuring device in case of damage!
The measuring range diodes and the battery test, rectangular signal generator as well as resistance measuring are
not protected against excess input voltage or overload. Exceeding the max. admissible input values or overload may
damage the measuring device or lead to mortal danger!
Legal notice
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
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. This publication represent the technical status at the
time of printing..
© Copyright 2015 by Conrad Electronic SE
V6_0315_02_JH
