Sealey TA320 - Manual (Page 19)

FREQUENCY (DUTY CYCLE) MEASUREMENTS (ELECTRONIC)
1. Set the rotary function switch to the green Hz/% position.
2. Insert the black lead banana plug into the
negative COM jack and the red test lead
banana plug into the positive Hz jack.
3. Touch the test probe tips to the circuit under
test.
4. Read the frequency on the display.
5. Press the MODE button to indicate “%”.
6. Read the % duty cycle in the display.
% 4 – 20mA MEASUREMENTS
1. Set up and connect as described for DC mA measurements.
2. Set the rotary function switch to the 4-20mA% position.
3. The meter will display loop current as a % with 0mA=-25%,
4mA=0%, 20mA=100%, and 24mA=125%.
INSULATION RESISTANCE MEASUREMENTS
a)Set the rotary function switch to the INSULATION position
and Press the RANGE button to chose one of the voltages
displayed in the top left corner.
b)Connect two testing lines to the item to be tested.
c)Push down and hold the “TEST” button or press the “LOCK” key first
and then the “TEST” button, if there is any static electricity present
in the item being tested and its voltage is over 30V, it will fail and no
high-voltage testing will occur, “>30V” will display on the LCD, the
symbol “ ” flashes, and the buzzer will sound. Otherwise it will
enter into the formal testing process and the high-voltage will show
on the primary display, the insulation resistance in M
Ω is indicated
in-phase with the analog bar; on the top right corner display, the