TPI 270, Instruction Manual

Page: 21 / 40

Measuring Capacitance
WARNING!
All capacitance measurements are to be made on de-energized
circuits with all capacitors discharged only. Failure to de-energize
and discharge capacitors prior to measuring them could result in
instrument damage and/or personal injury. Make sure the temper-
ature probe is NOT plugged in during this test.
Instrument set-up:
FUNC. BLACK RED
TEST LEAD
TEST LEAD
COM V/ W/m A
Measurement Procedure:
1. Disconnect power to circuit to be measured.
2. Plug black test lead into the COM input jack.
3. Plug red test lead into V/
W
input jack.
4. Set the rotary switch to the
5. Remove the capacitor from the circuit and discharge it.
6. Connect test leads to the capacitor to be measured.
Observe polarity on polarity sensitive capacitors.
7. Read the capacitor value on the LCD.
Optional Modes
(See Other Features Section)
• D-H: Freezes the reading on the LCD.
21 20
Measuring Frequency
WARNING!
Never attempt a frequency measurement with a voltage source
greater than 500V. Determine the voltage of any unknown fre-
quency source before connecting the instrument in frequency
mode. Make sure the temperature probe is NOT plugged in
during this test.
Instrument set-up:
FUNC. BLACK RED
TEST LEAD
TEST LEAD
Hz COM V/ W/m A
Measurement Procedure:
1. Disconnect power to the circuit to be measured.
2. Plug black test lead into the COM input jack.
3. Plug red test lead into V/
W
input jack.
4. Set the rotary switch to the Hz position.
5. Reconnect power to the circuit to be measured.
6. Read the frequency on the LCD.
Optional Modes
(See Other Features Section)
• D-H: Freezes the reading on the LCD.
•
MAX/MIN:
Records minimum and maximum measure-
ments
position.