VOLTCRAFT AT-200 Notice D'emploi page 31

c) Frequency measurement
In no event exceed the max. permitted input values. Do not contact
circuits or parts of circuits if you measure voltages higher than 25V
ACrms or 35V DC pending within them.
Proceed as follows to measure the frequency:
- Connect the black measuring line with the COM socket (7) and the red measuring
line with the VΩ-socket (6) till they are plane at the measuring instrument.
- Set the range selection switch (5) to position "Hz".
- Now connect the two measuring prods to the object to be measured (generator,
switching etc.).
- The current measuring value is shown on the display (1).
Proceed as follows to measure the pulse-pause ratio (duty cycle):
- Press the "Hz/%" button (2). You switch over these two measuring functions. The
measurement unit "%" appears on the display.
- Now connect the two measuring prods to the object to be measured (generator,
switching etc.). The current measuring value is shown on the display (1).
d) Temperature measurement
In no event exceed the max. permitted input values. Do not contact
circuits or parts of circuits if there could be voltages higher than
25V ACrms or 35V DC pending within them !
The temperature measurement can be performed only at the connection sockets (6)
= + and (7) = - and only by means of K-type thermosensors. Use the multipurpose
plug with the correct polarity for connecting the thermosensor.
The temperatures may only be applied at the sensor. The measuring instrument is
only specified (guaranteed precision) for an ambient temperature of 23°C (+/-5°C).
Proceed as follows to measure temperatures:
- Remove all measuring lines from the multimeter and set the range selection switch
(5) to position "C" or "F" (Fahrenheit).
- Insert the enclosed multipurpose plug with the correct polarity into the sockets (6)
and (7).
- Now, insert the plug of the K-type thermosensor with the right polarity (narrow
contact stud = +) into the multipurpose plug. Then, the temperature is indicated in
"°C" (Celsius) or "°F" (Fahrenheit) on the display.
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