4. operation
Warning!
ensure that you read, understand and apply the safety and operational instructions before connecting the meter. only
when you are sure that you understand the procedures is it safe to proceed with testing.
Warning!
Risk of electrocution. High voltage circuits, both AC and dC are very dangerous and should be measured with great care.
operating temperature range 0
°
C to 40
°
C.
remember
to turn on meter before use and to turn it off when measurement is completed.
note:
IF “ol” appears in the display during a measurement, the value exceeds the range you have selected. Change to a higher
range.
note:
On some low AC and DC ranges, with the test leads not connected to a device, the reading may show a random fluctuating
reading. This is normal and is caused by the high input sensitivity. The reading will stabilise and give a proper measurement when
connected to a circuit.
4.1.
Mode Button (fig.1.10)
4.1.1.
To select AC/dC voltages, AC/dC current, Resistance, diode, Continuity and Capacitance check.
4.2.
Stroke Button 4/2 (DIS) Hz, %, ms CYL range button. (fig.1.9.).
4.2.1.
To select stroke 4/2 (dIS) Hz, %, ms CYl range.
4.3.
Data Hold, Backlight Button (fig.1.7.)
4.3.1.
The data hold function allows the meter to freeze a measurement for later reference.
4.3.2.
Press the data hold button to freeze the reading in the display. The indicator “hold” will appear in the display.
4.3.3.
Press the data hold button to return to normal operation.
4.3.4.
Press and hold the data button for two seconds to to switch on the display backlight.
4.3.5.
Press and hold the data button again for two seconds to turn off the backlight.
4.4.
relative Button (fig.1.8.)
4.4.1.
The relative measurement feature allows you to make measurements relative to a stored reference value. A reference voltage, current
etc. can be stored and measurements made in comparison to that value. The displayed value is the difference between the reference
value and the measured value.
4.4.2.
Perform any measurement as described in the operating instructions.
4.4.3.
Press the relative button to store the reading in the display and the “Rel” indicator will appear in the display.
4.4.4.
The display will now indicate the difference between the stored value and the measured value.
4.4.5.
Press the relative button to return to normal operation.
4.5.
ac or Dc voltage measurements
4.5.1.
Insert the black test lead into the negative “CoM” jack and the red test lead into the positive “V” jack.
4.5.2.
Turn the rotary switch to the VdC/AC position.
4.5.3.
Press the “Mode” button to select ac or dc voltage.
4.5.4.
Touch the test probes to the circuit under test and read the voltage display.
note:
Pressing the Hz button (fig1.9.) while in the voltage function will switch the display to frequency or duty cycle.
4.6.
ac or Dc current measurements
Warning!
Do not
make current measurements on the 20A scale for longer than 30 seconds in every 15 minutes. exceeding 30
seconds may cause damage to the meter and test leads.
4.6.1.
Insert the black test lead into the into the negative “CoM” jack and the red test lead into the:
a) positive ua/ma jack
for currents to 400mA (fig.1.5.)
b) positive 20a jack
for currents to 20A (fig.1.6.)
4.6.2.
Turn the rotary switch to the uA, mA or A position.
4.6.3.
Press the mode button to select AC or dC current.
4.6.4.
Touch the test probes in series with the circuit under test and read the current on the display.
4.7.
resistance, Diode, continuity or capacitance measurements
Warning!
To avoid electric shock, disconnect power to unit under test and discharge all capacitors before taking any resistance or
capacitance measurements.
4.7.1.
Insert the black test lead into the negative “COM” jack and the red test lead into the positive Ω
CAP jack.
4.7.2.
Turn the rotary switch to the Ω
CAP position.
4.7.3.
Press the Mode button (fig. 1.1.) to select Ω or
or or CAP.
4.7.4.
Connect the test probes to the two ends of the Resistance, diode, Continuity, Capacitance or circuit to be measured.
4.7.5.
Read the measured value from the display.
4.7.6.
When on continuity range a beeping will be heard if the resistance is lower than 150Ω.
4.7.7.
When measuring the forward voltage across a good diode will indicate 0.4V or 0.7V will be indicated and the reverse voltage will
indicate “ol” (same as on open condition). For a short circuit diode, a value of 0mV will be displayed.
Warning!
When checking in-circuit capacitance, be sure to disconnect the power supply from the circuit and that the capacitors are
fully discharged. The range control mode in capacitance measurement is auto-ranging.
4.8.
Frequency or Duty cycle measurements
4.8.1.
Insert the black test lead into the negative “CoM” jack and the red test lead into the positive “Hz” jack.
4.8.2.
Turn the rotary switch to the “Hz %dUTY” position.
4.8.3.
Press the Hz % button (fig.1.9.) to select Hz or %.
4.8.4.
Touch the test probes to the circuit under test and read the frequency or duty cycle on the display.
4.9.
temperature measurements
4.9.1.
Insert the type K thermocouple plug into the negative “CoM” jack and the positive jack ensuring the + symbol on the plug is inserted
into the po jack and the negative symbol on the plug is inserted into the negative “CoM” jack.
4.9.2.
Turn the rotary switch to the select °C or °F.
4.9.3.
Read the temperature on the display.
4.10.
pulse Width measurement
4.10.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the po jack.
4.10.2. Turn the rotary switch to the PUlSe WIdTH position.
4.10.3. Connect the black test probe to ground and the red test probe to the signal wire that connects to the component to be measured.
note:
The applied time for most fuel injector is displayed on the negative (-) slope.
Original Language Version
© Jack Sealey limited
TA202 Issue 5 (-6) 20/09/18
