Radio Shack 22-812A, Руководство пользователя, Страница: 11 / 24

MASTER BKGRD 6-26-07
11
MASTER BKGRD 6-26-07
Taking Measurements
Taking Relative Measurement
The meter allows you to take measurements with zero offset or other values as
reference using the REL button
.
Use zero offset as reference
1. Set the meter to any function e�cept ºC/ºF , dBm ,
,
, LOGIC , or
h
FE .
2. Disconnect test leads for capacitance, or touch the test leads together for
other functions to measure zero offset.
3. when you see the reading, hold down REL . Rel appears.
4. Take a measurement. You will get the actual �alue of the measured
component.
Use baseline as reference
1. Set the meter to any function e�cept ºC/ºF , dBm ,
,
, LOGIC , or
h
FE .
2. press RANGE to select a suitable range for relati�e measurement if necessary.
3. Connect the test leads to the component whose measurement you want to
use as a baseline.
4. when you see the reading, hold down REL . Rel appears. The meter sets
to manual range.
5. Take a measurement. You will get the relati�e �alue of the measured
component to the baseline. if the measured �alue is lower than baseline, the
meter will show a negati�e relati�e �alue.
To reset a relati�e measurement, press REL again or set the function dial to
another setting.
Displaying Temperature
You can use an optional thermocouple module (not supplied) to measure
temperature with your meter.
WARNING: Do �OT use the thermocouple to measure objects when the �oltage
is abo�e 30 V RMS and 42.4 V peak or 60V DC.
1. Set the function dial to
ºC/ºF / V .
2. Unplug both test leads from the meter, plug the thermocouple’s common
plug into –COM (common), then plug the thermocouple’s +V plug into
+ V.mA.
Ω
.
3. press SELECT to select temperature measurement. Then press RANGE to to
toggle between Celsius and Fahrenheit, Celsius and Fahrenheit, C or F appears.
4. Touch the thermocouple’s sensor head to the object you want to test.