Sealey TM102 - Manual (Page 6)

5.1. REPLACING THE BATTERY
 WARNING! To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover.
5.1.1 When the battery becomes exhausted or drop below the operating voltage, “BAT” will appear in the LCD display. The
battery should be replaced.
5.1.2. Follow instructions for Battery Installation- section 1.4. of this manual. Dispose of the old battery properly - see recycling
statements at the end of this manual.
 WARNING! To avoid electric shock, do not operate the meter until the battery cover is in place and fastened securely.
5.2. REPLACING THE FUSES
 WARNING! To avoid electric shock, disconnect the test leads from any source of voltage before removing the fuse cover.
5.2.1. Disconnect the test leads from the meter and any item under test.
5.2.2. Open the fuse cover by loosening the screws on the cover using a Phillips head screwdriver.
5.2.3. Remove the old fuse from its holder by gently pulling it out.
5.2.4. Install a new fuse into the holder.
5.2.5. Always use a fuse of the proper size and value (0.5A/250V fast blow for the 200mA range, 10A/250V fast blow for the 10A
range).
5.2.6. Fit the fuse cover back in place. Insert the screws and tighten them securely.

WARNING! To avoid electric shock, do not operate the meter until the fuse cover is in place and fastened securely.
 WARNING! Before attempting to open the case, ensure that the test leads have been disconnected from the multimeter
and that it is switched off to avoid electric shock hazard.
5.3. Clean the multimeter’s casing using a very slightly dampened cloth and mild detergent - do not use any abrasives or
solvents. Clean the inside of each terminal using a swab soaked in isopropyl alcohol, use a new swab to apply a light
coat of machine oil to each terminal.
5.4. If the multimeter is to be stored for a long period of time, remove the battery first to avoid any damage.
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.
4.9. RESISTANCE MEASUREMENT
 WARNING! To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords.
4.9.1. Set the function switch to the Ω position.
4.9.2. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test lead banana plug into the positive
Ω jack.
4.9.3. Touch the test probe tips across the circuit or component under test. It is best to disconnect one side of the component
under test, so the rest of the circuit will not interfere with the resistance reading.
4.9.4. Read the resistance 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.
4.10. AUDIBLE CONTINUITY TEST

WARNING! To avoid electric shock, never measure continuity on circuits or wires that have voltage on them.
4.10.1. Set the function switch to the / •))) position and press the Mode switch until •))) is displayed.
4.10.2. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test lead banana plug into the positive
(Ω) jack.
4.10.3. Touch the test probe tips to the circuit or wire you wish to check.
4.10.4. If the resistance is less than approximately 30Ω, the audible signal will sound. If the circuit is open, the display will indicate “ I”.
4.11. DIODE TEST
4.11.1. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test lead banana plug into the positive
jack.
4.11.2. Set the function switch to the / •))) position and press the Mode switch until is displayed.
4.11.3. Touch the test probes to the diode under test and note the reading down. Reverse the probe polarity and note the reading
again. If one reading has a value and the other is OL, then the diode is OK. If both readings are OL, then the diode is
open. If both readings are small or 0, then the diode is shorted.
NOTE: the value shown during the check is the forward voltage.
4.12. TEMPERATURE MEASUREMENT

WARNING! To avoid electric shock, disconnect any test probes from any source of voltage before making a temperature
measurement.
4.12.1. To measure temperature, set the function switch to the °C/°F selection and press Mode switch to select either
°Farenheit range or °Centigrade range.
4.12.2. Insert the type K thermocouple probe “-” negative banana plug into the negative COM jack and the “+” banana plug into
the positive Temp jack.
4.12.3. Touch the Temperature Probe head to the part whose temperature you wish to measure. Keep the probe touching the
part under test until the reading stabilizes (about 30 seconds).
4.12.4. Read the temperature in the display. The digital reading will indicate the proper decimal point and value.

WARNING! To avoid electric shock, be sure the thermocouple has been removed before changing to another
measurement function.
5. MAINTENANCE
TM102 Issue No: 2(I)- 19/06/14
Original Language Version © Jack Sealey Limited