DEFORT DMM-1000N 98298123 - Инструкция по эксплуатации - Страница 10

9

GB

6. AFTER SALES SERVICE

Please retain the original packing. If the device needs to 
be transported again, the risk of damage during transport 
is minimised if you use the original packing. If a warranty 
claim is made, the device must be sent in as securely 
packed as possible, preferably in the original packing. All 
products undergo exhaustive testing before they leave 
the factory. Should however a defect be detected in your 
device, please contact at your Service address 

fi

 rst.

7. BEFORE PUTTING IN SERVICE

1.  In case the voltage and/or the current to be meas-

ured is/are unknown, set the rotary knob on the 
largest measuring range. If the accuracy on the 
rotary knob is insuf

fi

 cient, set on a lower range and 

soon.

2.  If the device is not going to be used temporarily, put 

the rotary knob in the OFF position.

3.  The switching of the multimeter is different for 

measuring voltage and for measuring current. 
Parallel connection in voltage measurement and 
series connection in current measurement. In the 
latter case, a conductor in the power circuit to be 
measured must be interrupted.

4.  Never connect a power source or voltage to the 

multimeter, if the FUNCTION switch is in the 

Ω

 or 

 position.

5.  Never connect a voltage higher than 1000 V DC or 

750 V AC to the measuring device.

8. BRIEF SYNOPSIS FOR MEASUREMENTS

The multimeter is suitable for measuring:
• 

Direct voltage (VDC, voltage of accumulator or bat-
tery, for example)

• 

Direct current (ADC)

• 

Alternating voltage (VAC, voltage of the mains input 
of a device, for example)

• Resistance 

(

Ω

, Ohm)

• 

Diodes and hFE transistor measurement

• 

Alternating current (AAC)

• Continuity 

test

A measurement object can be under voltage. To meas-
ure it, connect the multimeter in parallel.
If the current strength is to be measured, include the 
multimeter in the circuit (series connection). The power 
circuit for measuring the current must necessarily be 
isolated, because the current has to 

fl

 ow through the 

multimeter.
You must not switch the multimeter on Current meas-
urement, for example, if you are measuring the volt-
age. You could damage the multimeter beyond repair 
by causing a short circuit in this case.

9. OPERATION  

 1 

A.  3,5-digit LCD display (max. display: 1999. Display 

of decimal point, polarity, overload and discharged 
battery indication.

B.  FUNCTION switch: Rotary switch for the range to 

beset

C.  20 A. Positive connection for current measurements 

over 200 mA up to a maximum value of 20 A.

D.  mA. (0-200 mA)
E.  COM. Negative connection.
F. V

Ω

. Positive connection for voltage and resistance 

measurements.

10. MEASUREMENTS
10.1 MEASURING DIRECT VOLTAGE (V DC)

1.  Connect the BLACK lead to the «COM» connector 

socket and the RED lead to the «V

Ω

mA» connector 

socket.

2.  Set the FUNCTION switch on the desired «V» set-

ting and connect the leads to the voltage source to 
be measured or measuring points. Observe correct 
polarity (red is + and black is -), otherwise the dis-
play shows a minus sign before the value.

3.  Read offthe measured value in Volt.

RANGE

ACCURACY

200 mV

± 1,5%

2 V

20 V

20 V

1000 V

Input resistance 10 M

Ω

Overload protection DC 1000 V or AC 750 V
Effective value (outside 200-mV-range with highest 
value of 250 V Effective value).

HINT:

1.  In case the voltage range is unknown, you must put 

the FUNCTION switch in the highest measurement 
range and then reduce the range gradually if re-
quired.

2. If the 

fi

 gure «I» now appears on the display, the 

measurand lies outside the range set. The FUNC-
TION switch must be switched to a higher range.

3.  The maximum input voltage is 1000 V DC. Higher 

voltages cannot be measured.

4.  Proceed extremely cautiously with the measure-

ment of high voltages.

10.2 MEASURING ALTERNATING VOLTAGE 
(V AC)

1.  Connect the BLACK lead to the «COM» connecting 

point and the RED lead to the «V

Ω

mA» connecting 

point.

2.  Set the FUNCTION switch on the desired «V» set-

ting and connect the leads to the voltage source to 
be measured or measuring points. The polarity of 
the measuring tips is not relevant.

3.  Read off the measured value in Volt.

RANGE

ACCURACY

2 V

± 2,0%

20 V

200 V

750 V

Input resistance 10 M

Ω

 Frequency range 40-1000 Hz.

Overload protection AC 750 V Effective value or DC