Measuring Range - Maxwell 25304 User Manual

Note:
If you do not connect a unit to the connectors (or there is a
•
break) the display will show „OL" .
During the test 1 mA current goes through the diode.
•
The display shows the opening voltage of the diode in mV,
•
and overload if the diode is connected with the polarity
reversed
Temperature measuring
Set the function switch to °C position.
•
Connect the black wire of the temperature
•
measuring sensor to the „mA" connector and the
red one to the „V/Ω/Hz" connector. Put the sensor
to the place measured. The display shows the
measured value in °C.
Note:
The device functions with a special temperature measuring
•
sensor.
If the sensor is not connected to the connector, the device
•
displays the temperature of the environment.
Do not connect outward voltages to the connectors, if the
•
device is in temperature measuring function.
Transistor hFE test
Set the function switch to hFE position.
•
Determine if the transistor is NPN or PNP and
•
place it in the proper connector.
The amplification factor of the transistor is
•
displayed on the screen.
IB = 10 μA, VCE = 2,8 V
•
Frequency measuring
Connect the measuring wire or the shielded
•
cable to the „COM" and „V/Ω/Hz" connectors.
Set the function switch to „Hz" position and
•
touch the wires to the signal source.
Note:
Do not measure frequency at a voltage exceeding 250
•
V(RMs).
In noisy environment it is advised to use a shielded cable
•
for measuring small values.
Avoid touching the circuit when measuring high voltage!
•
Frequency measuring changes range automatically.
•
Inductance measuring
Set the function swith to the desired
•

measuring range.

Connect the measured inductor to the LX
•
connector.
Bemerkung:
If the measured inductance is not known, start measuring
•
at 2 mH range until overload signal turns off.
Inductors with low inductance function as short circuits. If
•
possible, do not connect such inductors to the connectors.
Measuring maximum value
Press PK HOLD button once and the highest value
•
measured will be displayed.
Press PK HOLD button once more to turn off the function.
•
W
arning
When measuring voltage make sure that the wires are
•
not connected to a current measuring connector and
that the function switch is not in resistance or diode
measuring measuring mode. Always check if you have
connected the wires into the proper connectors.
Be careful when measuring voltage above 50 V,
•
especially with high voltage equipment.
Avoid connecting to „live" circuits.
•
Turn off the power in the circuit before connecting the
•
multimeter to measure current and do not measure
above 20 A.
Before measuring resistance and diode make sure the
•
circuit is not under power.
Always set the function and measuring range
•
appropriate for the measuring. If in doubt, set the
maximum measuring range and go backwards.
Make sure that the wire and its isolation is not damaged.
•
Only replace fuses to the same type and value.
•
When replacing the fuse or battery make sure all
•
external power sources are turned off and that the
multimeter is turned off as well.
EN
User Manual