Sealey TM102 - Manual (Page 5)

4.5. DC VOLTAGE MEASUREMENT
CAUTION: Do not measure DC voltages if a motor on the circuit is being switched ON or OFF.
Large voltage surges may occur that can damage the meter.
4.5.1. Set the function switch to the V DC position, DC and mV will appear on the display.
4.5.2. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test lead banana plug into the positive
(V) jack.
4.5.3. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the
circuit.
4.5.4. Read the voltage in the display. AutoRanging will select the correct range, or manually select the desired range (see 4.2.)
to obtain a higher resolution reading. The display will indicate the proper decimal point and value. If the polarity is reversed,
the display will show (-) minus before the value.
4.6. AC VOLTAGE MEASUREMENT

WARNING! Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V
outlets for appliances because the contacts are recessed deep in the outlets.
As a result, the reading may show 0 volts when the outlet actually has voltage on it. Make sure the probe tips are touching
the metal contacts inside the outlet before assuming that no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may
occur that can damage the meter.
4.6.1. Set the function switch to the V AC position, AC and V will appear on the display.
4.6.2. Insert the black test lead banana plug into the negative (COM) jack. Insert red test lead banana plug into the positive (V) jack.
4.6.3. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the
circuit.
4.6.4. Read the voltage in the display. AutoRanging will select the correct range, or manually select the desired range (see 4.2.)
to obtain a higher resolution reading. The display will indicate the proper decimal point and value. If the polarity is reversed,
the display will show (-) minus before the value.
4.7. DC CURRENT MEASUREMENT
CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
4.7.1. Insert the black test lead banana plug into the negative (COM) jack.
4.7.2. For current measurements up to 2000µA DC, set the function switch to the µA position and insert the red test lead banana
plug into the (µA) jack.
4.7.3. For current measurements up to 200mA DC, set the function switch to the mA range and insert the red test lead banana
plug into the (mA) jack.
4.7.4. For current measurements up to 10A DC, set the function switch to the 10A range and insert the red test lead banana plug
into the (10A) jack.
4.7.5. Press the Mode switch to select DC on the display.
4.7.6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current.
4.7.7. Connect test leads in series with the circuit under measurement.
4.7.8. Apply power to the circuit.
4.7.9. Read the current in the display. AutoRanging will select the correct range, or manually select the desired range (see 4.2.)
to obtain a higher resolution reading. The display will indicate the proper decimal point and value. If the polarity is reversed,
the display will show (-) minus before the value.
4.8. AC CURRENT MEASUREMENT

WARNING! To avoid electric shock, do not measure AC current on any circuit whose voltage exceeds 250V AC
CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
4.8.1. Insert the black test lead banana plug into the negative (COM) jack.
4.8.2. For current measurements up to 2000µA AC, set the function switch to the µA position and insert the red test lead banana
plug into the (µA) jack.
4.8.3. For current measurements up to 200mA AC, set the function switch to the mA range and insert the red test lead banana
plug into the (mA) jack.
4.8.4. For current measurements up to 10A AC, set the function switch to the 10A range and insert the red test lead banana plug
into the (10A) jack.
4.8.5. Press the Mode switch to select AC on the display.
4.8.6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current.
4.8.7. Connect test leads in series with the circuit under measurement.
4.8.8. Apply power to the circuit.
4.8.9. Read the current in the display. AutoRanging will select the correct range, or manually select the desired range (see 4.2.)
to obtain a higher resolution reading. The display will indicate the proper decimal point and value. If the polarity is reversed,
the display will show (-) minus before the value.
TM102 Issue No: 2(I)- 19/06/14
Original Language Version © Jack Sealey Limited