Test Products International 440 - Manual (Page 24)

25 23
i. Measuring Frequency
WARNING!
Never attempt a frequency measurement with a voltage
source greater than 600V. Determine the voltage of any
unknown frequency source before connecting the instru-
ment in frequency mode.
Instrument set-up:
FUNCTION BLACK RED MINIMUM MAXIMUM
TEST LEAD TEST LEAD READING READING
Hz COM V
Ω
0.01Hz 2.0000MHz
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 the V
Ω input jack.
4. Set the rotary switch to the Hz function.
5. Reconnect power to circuit to be measured.
6. Read the frequency on the LCD.
!
Optional DMM Functions
PERIOD
F1 F2 F3 F4 F5
F4 Period Push F4 to display the Period (1/time) of measured frequency.
Optional D Mode Functions (refer to page 29)
COMBO METER SCOPE TREND EXIT
F1 F2 F3 F4 F5