TM105 Issue No: 2(I) - 17/06/14
© Jack Sealey Ltd
Original Language Version
4. OPERATING INSTRUCTIONS
NOTICE:
Read and understand all warning and precaution statements listed in the safety section of this operation manual prior to
using this meter. Set the function select switch to the OFF position when the meter is not in use.
4.1. AC Current Measurements
WARNING!
Ensure that the test leads are disconnected from the meter
before making current clamp measurements.
4.1.1. Set the Function switch to the 400.0A ~ 2.000A range.
4.1.2. If the range of the measured is not known, select the higher range first
then move to the lower range if necessary.
4.1.3. Press the trigger to open jaw. Fully enclose one conductor to be measured.
The clamp meter LCD will display the reading.
4.2. DC/AC Voltage Measurements
4.2.1. Insert the black test lead into the negative COM terminal and the red test
lead into the positive V terminal.
4.2.2. Set the function switch to the V position.
4.2.3. Select AC or DC with the MODE button.
4.2.4. Connect the test leads in parallel to the circuit under test.
4.2.5. Read the voltage measurement on the LCD display.
4.3. Resistance Measurements
4.3.1. Insert the black test lead into the negative COM terminal and the red test lead into the positive terminal.
4.3.2. Set the function switch to the Ω •))) position.
4.3.3. Touch the test probe tips across the circuit or component under test. It is best to disconnect one side of the device under
test so the rest of the circuit will not interfere with the resistance reading.
4.3.4. For Resistance tests, read the resistance on the LCD display.
4.4. Diode and Continuity Measurements
4.4.1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive diode
jack.
4.4.2. Turn the rotary switch to the Ω •))) position.
4.4.3. Press the MODE button until “ “ appears in the display.
4.4.4. Touch the test probes to the diode under test. Forward voltage will indicate 0.4V to 0.7V. Reverse voltage will indicate “OL”.
Shorted devices will indicate near 0mV and an open device will indicate “OL” in both polarities.
For Continuity tests, if the resistance is < 150Ω, a tone will sound.
4.5. Non-Contact AC Voltage Measurements
WARNING!
Risk of Electrocution. Before use, always test the Voltage Detector on a known live circuit to verify proper
operation
4.5.1. Touch the probe tip to the hot conductor or insert into the hot side of the electrical outlet.
4.5.2. If AC voltage is present, the detector light will illuminate.
NOTE!
The conductors in electrical cord sets are often twisted. For best results, rub the probe tip along a length of the cord to
assure placing the tip in close proximity to the live conductor.
NOTE!
The detector is designed with high sensitivity. Static electricity or other sources of energy may randomly trip the sensor.
This is normal operation
4.6. MODE BUTTON
To select DC/ACV, OHM / Diode / Continuity
4.7. DATA HOLD BUTTON
To freeze the LCD meter reading, press the data hold button. The data hold button is located on the left side of the meter
(top button). While data hold is active, the HOLD display icon appears on the LCD. Press the data hold button again to
return to normal operation.
4.8. MAX HOLD BUTTON
The max. Hold position is used to measure the maximum value. The maximum measured value is up dated continuously.
Press once again the button, will release the hold and allow a further measurement.
4.9. RANGE BUTTON
When the meter is first turned on, it automatically goes into AutoRanging. This automatically selects the best range for the
measurements being made and is generally the best mode for most measurements. For measurement situations requiring
that a range be manually selected, perform the following:
4.9.1. Press the RANGE button. The “Auto Range” display indicator will turn off, The “Manual Range” display indicator will turn on
4.9.2. Press the RANGE button to step through the available ranges until you select the range you want.
4.9.3. Press and hold the RANGE button for 2 seconds to exit the ManualRanging mode and return to AutoRanging.
Red Black Black Red
Probe Probe Probe Probe
Forward test Reverse test
