Amprobe AMB-50 Insulation-Resistance-Tester - Manual (Page 13)

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4. Insert the red test lead into the LINE input terminal and the black test lead into GUARD
input terminal.
5. Connect the red and black alligator clip to the circuit to be measured, negative voltage
output from LINE terminal.
6. Choose below insulation resistance measurement mode.
a) Continuous Measurement
• Press TIME button to select continuous measurement mode, there is no timer icon on the
LCD.
• Press and hold TEST button for 1 second to carry out continuous measurement. Output
insulation resistance testing voltage, TEST button light up, blinks on every 0.5 seconds.
• Press TEST button to close the insulation resistance measurement voltage when
measurement is completed. TEST button lights off, disappears. The LCD shows the current
insulation resistance measurement value.
b) Timed Measurement
• Press TIME button to select timed measurement mode, the LCD displays TIME 1 and
symbols.
• Press and buttons to set the time (00:10~15:00). Within 1 minute, the time increment
or decrement by every 5 seconds. Afterward, the time increment or decrement by every 30
seconds.
• Then press and hold TEST button for 2 second to carry out timed measurement. TIME 1 and
are displayed and blinked on the LCD on every 0.5 seconds.
• When the set time is reached, the insulation resistance measurement voltage will be
closed and the measurement will be automatically stopped. The LCD displays the insulation
resistance reading.
c) Polarization Index (PI) Measurement
• Press TIME button to select timed measurement mode, the LCD displays TIME 1 and
symbols.
• Press and buttons to set the time (00:10~15:00). Within 1 minute, the time increment
or decrement by every 5 seconds. Afterward, the time increment or decrement by every 30
seconds.
• Press TIME button again. TIME 2, PI and symbols appear on the LCD.
• Press and buttons to set the time (00:15~15:30). Within 1 minute, the time increment
or decrement by every 10 seconds. Afterward, the time increment or decrement by every 30
seconds.
• Then press and hold TEST button for 2 seconds to carry out timed measurement.
• TIME 1 and are displayed and blinked on the LCD on every 0.5 seconds before TIME 1 set
time is reached.
• TIME 2 and are displayed and blinked on the LCD on every 0.5 seconds before TIME 2 set
time is reached.
• When the two set time are reached, the insulation resistance measurement voltage
will be closed and he measurement will be automatically stopped. The LCD displays the
polarization index reading.
• Press , to set through the polarization index, TIME 2 insulation resistance reading and
TIME 2 insulation resistance reading