DEFORT DMM-1000N 98298123 - Инструкция по эксплуатации - Страница 11

10

GB

1000 V peak value (constantly in all ranges).
Display: Corrected centre point corresponds to the ef-
fective value in a sinusoidal form.)

HINT:

1. In case the voltage range is unknown, you must set 
the FUNCTION switch in the highest measurement 
range and then reduce the range gradually if required.
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 750 VAC effective 

value. Higher voltages cannot be measured.

4.  Proceed extremely cautiously with the measure-

ment of high voltages.

10.3 MEASURING DIRECT CURRENT (ADC)

1.  Connect the BLACK lead to the COM connector 

socket. Connect the RED lead to the «V

Ω

mA» con-

nector socket. For measurements between 200mA 
and 20 A, remove RED lead to «20 A» connector 
socket.

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

ting and connect the leads in series to the power 
circuit to be measured. Observe correct polar-
ity (red is + and black is -), otherwise the display 
shows a minus sign before the value. The techni-
cal current direction of the RED lead to the BLACK 
lead is displayed at the same time with the current 
strength.

3.  Read off the value in (milli-) Ampere.

RANGE

ACCURACY

200 

η

A

± 2,0%

2 mA

20 mA

200 mA

20 A

Overload protection 0.2 A/250-V cut-out, 20-A-range 
not protected.

HINT:

1.  In case the current range is previously unknown, 

you must set the FUNCTION switch in the highest 
measurement range and then reduce the measure-
ment range gradually if required.

2. If the 

fi

 gure «I» now appears on the display, the 

measurand lies outside the set measurement 
range. The FUNCTION switch must be switched to 
a higher measurement range.

3.  The 20 A range is not protected with a fuse. Do not, 

therefore, measure for longer than 10 seconds.

10.4 MEASURINGTHE RESISTANCE (

Ω

 Ohm)

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

socket and the RED lead to the «V

Ω

mA» connec-

tor socket. (Hint: The polarity of the red lead is then 
«+».)

2.  Setthe FUNCTION switch on the desired «

Ω

» 

measuring range.

RANGE

ACCURACY

200 

Ω

± 2,0%

200 

Ω

2 K

Ω

20 K

Ω

200 K

Ω

2 M

Ω

20 M

Ω

Overload protection 250 V DC or AC Effective value, 
for maximum 15 seconds

3.  Connect the measuring tips to the components to 

be measured. Ensure that the component is not 
linked to the other components. Do not touch the 
measuring tips so as not to affect resistance val-
ues.

4.  Read off the measured value in 

Ω

 (Ohm).

5.  While measuring the resistances, current from the 

internal battery is used. This current consumption 
differs according to the set measurement range.

HINT:

1.  n case the measurand exceeds the highest value in 

the set measurement range, the display shows «I». 
Select a higher measurement range. If the resist-
ance is about 1 M

Ω

 and higher, the measuring de-

vice can take a couple of seconds to stabilise. This 
is normal in the measurement of high resistances.

2.  If the input is not connected, say in a broken power 

circuit, the display shows the 

fi

 gure «I». This means 

that the measurement falls outside the range.

3.  In case the resistance to be measured is connected 

to a power circuit, you must switch off the voltage 
before beginning the measurement and see that all 
capacitors are discharged.

10.5 DIODES MEASUREMENT 
(CONDUCTING-STATE VOLTAGE)

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

socket and the RED lead to the «V

Ω

mA» connec-

tor socket. (Hint: The polarity of the red lead is then 
«+».)

2.  Setthe FUNCTION switch on the 

 -range and 

connect the measuring tips to the diode to be 
measured. In the measurement of diodes or tran-
sistors, the polarity of the measuring tips deter-
mines whether the forward direction or the blocking 
direction is measured. The displayed value is the 
conducting-state voltage drop.

- 

The tripping current is 0.8 mA.

- 

In case the measuring tips are not or wrongly con-
nected to the diode i.e. in the blocking direction, the 
display shows the 

fi

 gure I.

10.6 HFE-TRANSISTOR MEASUREMENT

1.  Remove the measuring cable.