Extech Instruments EX710 Bedienungsanleitung Seite 10

Temperature Measurements(ModeI EX730 only)
I. Set the function switch to the TEMP position.
2. Insert the Temperature Probe into the negative COM and the
positive jacks, observing polarity.
3. Touch the Temperature Probe head to the device under test.
Continue to touch the part under test with the probe until the
reading stabilizes.
Read the temperature on the display. The digital reading will
4.
indicate the proper decimal point and value.
Use the MODE button to select OFor oc.
5.
WARNING: Toavoidelectric shock, b esurethethermocouple probe hasbeen removed
before changing to anothermeasurement function.
Continuity Measurements
Insert the black test lead into the negative COM terminal and the red test lead into
the V.Q.CAP.TEMP.Hz. -N- positive terminal.
2. Set the function switch to the position.
Use the MODE button to select continuity
3.
the MODE button is pressed.
Touch the test probe tips across the circuit or component under test.
4.
If the resistance is < 40Q, a tone will sound.
5.
Diode Test
Insert the black test lead banana plug into the negative COM jack and the red test
lead banana plug into the
Turn the function switch to position. Use the MODE button to select the diode
2.
function if necessary (diode symbol will appear on the LCD when in Diode test mode)
Touch the test probe tips to the diode or semiconductor junction under test. Note the
3.
meter reading
4. Reverse the test lead polarity by reversing the red and black leads. Note this
reading
The diode or junction can be evaluated as follows:
5.
If one reading displays a value (typically 0.400V to 0.900V) and the other
reading displays OL, the diode is good.
If both readings display OL the device is open.
If both readings are very small or 'O',the device is shorted.
9599
The display icons will change when
positive jack
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Data Hold
To freeze the LCD reading, press the HOLD button. While data hold is active, the HOLD
icon appears on the LCD. Press the HOLD button again to retum to normal operation.
DC ZERO (Relative) (EX730 only)
The DC ZERO is a relative feature and can be used in any function.
I. Press the DC ZERO button to zero the display. "ZERO" will appear in the display.
The displayed reading is now the actual value less the stored "zero" value.
2. Press the DC ZERO button to view the stored value. "ZERO" will flash in the display.
3. To exit this mode, press and Hold the ZERO button until "ZERO" is no longer in the
display.
Peak Hold
The Peak Hold function captures the peak AC or DC voltage or current. The meter can
capture negative or positive peaks as fast as I millisecond in duration.
Turn the function switch to the A or V position.
I.
Use the MODE button to select AC or DC (ADC EX730 only).
2.
Allow time for the display to stabilize.
3.
Press and Hold the PEAK button until "CAL" appears in the display. This procedure
4.
will zero the range selected.
Press the PEAK button, Pmax will display.
5.
The display will update each time a higher positive peak occurs.
6.
Press the PEAK button again, Pmin will display. The display will now update and
7.
indicate the lowest negative peak.
To return to normal operation, press and hold the PEAK button until the Pmin or
B.
Pmax indicator switches Off.
Note: If the Function switch position is changed after a calibration the Peak Hold
calibration must be repeated for the new function selected.
LCD Backlight Button
The LCD is equipped with backlighting. Press the backlight button to turn the backlight on.
Press again to tum the backlight off.
Automatic Power OFF
In order to conserve battery life, the meter will automatically turn off after approximately
25 minutes. To turn the meter on again, turn the function switch to the OFF position and
then to the desired function position.
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