4.1.
moDe Button
(fig.1.2)
4.1.1.
Press the Mode button to toggle between:
AC / dC Voltage
AC / dC Current
Resistance, Continuity and diode measurements.
4.2.
range Button (fig.1.3)
The range is automatically selected in modes where Auto-ranging is stated above.
4.2.1.
To manually select a range within a function, press the range button repeatedly until the desired range is selected.
4.2.2.
To exit the manual range mode and return to auto-ranging, press and hold the range button for two seconds.
note:
If the range is too high, the meter will be less accurate.
If the range is too low, the meter displays ‘ol’ (over limit).
4.3.
HolD Button
(fig.1.1)
.
The data hold function allows the meter to freeze a measurement reading for later reference.
4.3.1.
Press the data hold button once to freeze the reading in the display. The indicator “hold” will appear in the display.
4.3.2.
Press the data hold button again to return to normal operation.
4.4.
peak Button (fig.1.5).
4.4.1.
The peak measurement feature allows peak AC / dC Voltage or Current to be captured. The analyser can capture peaks as quick as 1
millisecond in duration.
4.4.2.
Whilst in AC / dC Voltage or Current measurement mode, press and hold the Peak button until CAl is displayed. This procedure will
zero the range selected.
4.4.3.
Press the Peak button again and Pmax will display. Manual ranging is selected. The display will now update each time a higher peak
occurs.
4.4.4.
Press the Peak button again and Pmin will display. The display will now update each time a lower negative peak occurs.
4.4.5.
Press and hold the Peak button and Pmax or Pmin will switch off and the analyser returns to normal mode.
4.5.
BackligHt Button (fig.1.6).
4.5.1.
To turn the backlight on, press the backlight button.
4.5.2.
To turn the backlight off, press the backlight button again.
4.6.
maX/min Button (fig.1.4).
4.6.1.
Press the MAX/MIn button to enter the MAX/MIn recording mode. The display icon MAX will be displayed. Press it again and MIn will
be displayed. The analyser will go to manual ranging and display and hold the maximum or minimum reading (as selected) and will
update only when a new “max or min” occurs.
4.6.2.
Press the MAX/MIn button again and a flashing “MAX MIn” will appear. The analyser will display the present reading, but will continue
to update and store the max and min readings.
4.6.3.
To exit MAX/MIn mode, press and hold the MAX/MIn button for 2 seconds.
4.7.
ac anD Dc voltage measurement
4.7.1.
Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
ΩHz% etc. jack.
4.7.2.
Turn the rotary switch to the VAC or VdC position as required.
4.7.3.
Touch the test probes to the circuit under test (black test probe to earth or negative terminal) and read the voltage displayed.
note:
important:
Voltage must be measured in parallel (Red probe measuring circuit from power source).
Warning:
When measuring voltage, be sure that the red test lead is in the jack marked V
ΩHz% etc. If the red test lead is in the 20A
or 400mA jack, the user may be injured or the analyser damaged.
4.8.
ac anD Dc current measurement
Warning!
Do not
make current measurements on the 400mA and 20A ranges for longer than 30 seconds. Allow 5 minutes for cool
down before commencing measurements again. exceeding 30 seconds may cause damage to the meter and test leads.
4.8.1.
Insert the black test lead into the negative “CoM” jack and the red test lead into either the Positive 400mA jack for currents up to
400mA (fig.1.9) or the Positive 20A jack for currents from 400mA to 20A (fig.1.8).
note:
If you are unsure of the current draw, select the 20A jack first.
4.8.2.
Turn the rotary switch to the 20A or mA position.
4.8.3.
Press the mode button to select AC or dC current.
Warning!
Be sure to disconnect the power supply from the circuit.
4.8.4.
Touch the test probes in series with the circuit under test. Turn the power on to the circuit, and read the current displayed.
4.9.
Resistance Measurement
Warning!
To avoid electric shock, disconnect power to unit under test and discharge all capacitors before taking any resistance
measurements. Accurate resistance measurement cannot be taken if voltage is present. only measure in non-powered circuits.
4.9.1.
Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
Ω
Hz% etc. jack.
4.9.2.
Turn the rotary switch to the
position.
4.9.3.
Press the Mode button (fig.1.12) to select the resistance
Ω
mode.
4.9.4.
Connect the test probes to the two ends of the Resistance circuit to be measured.
4.9.5.
Read the measured value on the display.
4.9.6.
If greater accuracy is required, press the Range button to select the desired range.
4.10.
DioDe test
important:
Turn the power oFF to the test circuit
4.10.1. Insert the black test lead into the negative “CoM” jack and the red test lead into the positive V
Ω
Hz% etc. jack.
4.10.2. Turn the rotary switch to the position.
4.10.3. Press the Mode button (fig.1.12) to select the diode mode.
4.10.4. Connect the test probes to the two ends of the diode to be tested, read the measured value on the display.
4.10.5. Reverse the test probes on the two ends of the diode to be tested, read the measured value on the display again.
4.10.6. When measuring the voltage across a good diode, it will be high in one direction and low in the other. A defective diode will read the
same in both directions or read between 1.0 to 3.0 V. in both directions
Ω
Ω
TA303 Issue 2 (HF) 03/10/18
Original Language Version
© Jack Sealey limited
