Triplett 9045 - Manual (Page 28)

28 Triplett Model 9045
7.2.10.3 Connect the test leads to the circuit to be measured, and read the
frequency on the LCD display. Observe the position of the decimal point and
the annunciator to determine the units of measure (i.e. Hz, kHz, MHz, etc)
7.2.10.4 To measure Duty Cycle, press and release the Hz/DUTY button. The
display will change to a Duty Cycle readout in %. Press the button again to
return to the Frequency measurement mode.
7.2.10.5 High Voltage Low Frequency (120VAC, 220VAC, 480VAC, 50Hz, 60Hz)
measurements are made in the AC Voltage measurement mode. Set the
FUNCTION switch to
7.2.10.6 Connect the black test lead to the COM jack, and the red test lead to the
jack.
7.2.10.7 Connect the test leads to the circuit to be measured and read the
voltage of the signal to be measured.
7.2.10.8 To measure Frequency, press and release the Hz/DUTY button. The
display will change to a frequency readout. Observe the position of the
decimal point and the annunciator to determine the units of measure (i.e.
Hz, kHz, etc). Press the button again to measure Duty Cycle in %. Press the
button again to return to the AC Voltage measurement mode.
Notes: The test is very sensitive and is intended to measure low level
signals in electronic circuitry. If it is used to measure the frequency of an AC
power line, even small amounts of noise or distortion on the line may cause er-
ratic readings.
8: MAINTENANCE
Your Triplett Model 9045 DMM is a precision measuring instrument and, when
used as described in this manual, should not require maintenance.
However, periodic calibration of the meter will insure that it is accurate and per-
forming in accordance with its design specifications. A one year calibration inter-
val is suggested.
To clean the outside of the meter, use a cloth dampened with a mild detergent
solution. Do not use any abrasive cleansers, or chemical solvents that may dam-
age the case of the meter.