Maxwell MX-25 302 User's Guide download pdf (Page 10)

Note:

1. This unit uses a special temperature measuring sensor.

2.7 Transistor h

Test

Turn the switch to h

fe.

1. Connect the sensor to the COM and mA ports.

2. Put the transistor into the appropriate socket, depending on the transistor being NPN or PNP.

3. The display shows the current amplifying factor of the transistor I

= 10uA, V

=3V.

2.8 Frequency measurement

1. Connect the instrument cable or shielded wire to the COM and to the V//Hz/C port.

2. Set the switch to “200kHz” and touch the source of the signal with the leads.

Note:

1. Do not try to measure the frequency when the voltage is more than 250V (RMS)

2. In noisy environment use shielded cable when measuring low signals

3. Do not touch the circuit when measuring high voltage

2.9 Freezing the display

1. Press the HOLD button to freeze the display with the current data, press the hold again to turn it back to measurement mode.

3. Automatic stand-by mode

1. 15 minutes after the latest measurement the unit will switch to stand-by mode

2. To turn it on again press the POWER button

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Maxwell MX-25 302 User's Guide Page 10