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5. OperAtiON
5.1.
data Hold mode
5.1.1.
Press the " Hold '" button to hold the present reading on the display,
5.1.2.
To exit the data Hold mode, just press this button again,
5.2.
relative mode
5.2.1.
Selecting relative mode makes the meter store the present reading as a reference for subsequent measurements and zero the display.
5.2.2.
Press the
5.2.3.
The triangle symbol
5.2.4.
When a new measurement is taken, the display shows the difference between the reference and the new measurement.
5.2.5.
To exit Relative mode, press the
Note:
(i) For measurement functions which have both autorange mode and manual range mode, the meter changes to manual range mode
automatically when you select Relative mode. Select the desired manual range before you select Relative mode.
(ii) When you use Relative mode, the actual value of the object under test must not exceed the full-range reading of the selected
range. Use a higher range if necessary.
5.3.
manual ranging and Autoranging
5.3.1.
The meter defaults to autorange mode in measurement functions which have both autorange mode and manual range mode. When
the meter is in autorange mode, "Auto" is displayed.
5.3.2.
Press the rANGe/
5.3.3.
each press of the rANGe/
range.
5.3.4.
To exit the manual range mode, press and hold down the rANGe/
autorange mode, and "Auto" appears.
Note: only voltage, current and resistance measurement functions have autorange mode and manual range mode.
5.4.
measuring AC/dC Voltage
5.4.1.
Connect black test lead to the COm terminal and the red test lead to the
5.4.2.
Set the function switch to the V position for dC, V for AC.
5.4.3.
Connect the test leads across the source or circuit to be tested.
5.4.4.
Read the reading on the display. The polarity of the red test lead connection will be indicated as well.
Note: To avoid electric shock or damage to the meter, do not apply a voltage higher than 600V between terminals.
measuring dC Current
5.5.
5.5.1.
Set the function switch to the A position.
5.5.2.
If the display does not read zero, press the
5.5.3.
Press the trigger and clamp the jaws around the conductor to be tested. make sure that the jaws are perfectly closed.
Note:
a. only one conductor should be clamped.
b. The conductor should be in the centre of the jaws to get an accurate reading.
c. dO NOt touch any conductor with any part of the body.
5.5.4.
Read the reading on the display.
Note:
(i) Remove all the test leads from the meter before using the meter for current measurements.
(ii) After you set the function switch to the A position, wait 5 to 10 minutes before proceeding. This is necessary for accurate
measurements.
(iii) The meter's measuring capacity is 100A. measuring a current higher than 100A will cause a larger measurement error.
(iv) The reading on the display also indicates the current direction:
A positive reading (negative sign "-" does not appear) indicates that the current direction is from the meter's front to its back. (note:
Current direction is the opposite of electron flow direction).
dO NOt use the meter to measure a circuit's current if the circuit's voltage exceeds 600V.
8
5.6.
measuring AC Current
5.6.1.
Set the function switch to the
5.6.2.
Press the trigger and clamp the jaws around the conductor to be tested. make sure the jaws are perfectly closed.
Note:
(i) only one conductor should be clamped.
(ii) The conductor should be in the centre of the stand to get an accurate reading.
(iii) dO NOt touch any conductor with any part of the body.
5.6.3.
Read the reading on the display.
Note:
(i) Remove all test leads from the meter before using the meter for current measurements.
(ii) After the function switch is set to the
measurements.
(iii) The meter's measuring capacity is 100A. measuring a current higher than 100A will cause a larger measurement error.
(iv) dO NOt use the meter to measure a circuit's current if the voltage exceeds 600V.
© Jack Sealey limited
button. The meter enters relative mode and stores the present reading for subsequent measurements.
appears on the display as an indicator. The display reads zero.
button again and the
button to enter the manual range mode. The symbol "Auto" disappears.
button increases the range. When the highest range is reached, the meter scrolls to the lowest
position.
position, wait 5 to 10 minutes before proceeding. This is necessary to obtain accurate
Original Language Version
will appear on the display as an indicator.
disappears.
disappears.
button for about 2 seconds. The meter returns to the
terminal.
button for zeroing.
TA305 Issue 3 (3) - 12/12/18
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