Gossen MetraWatt METRA HIT 16I/L, Руководство по эксплуатации

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11 Capacitance Measurement
➭
Be certain that the device under test is voltage-free. Extraneous
voltages distort the measurement results!
➭
Set the rotary switch to “F”.
➭
Connect the (discharged!) DUT to the “
⊥
” and “F” jacks with
measurement cables.
Note!
For polarized capacitors, the “–” pole must be con-
nected to the “
⊥
” jack.
Resistors and semiconductor paths connected in paral-
lel to the capacitor distort measurement results!
Zero Balancing in the 30 nF Measuring Range
The inherent capacitance of the instrument and the capacitance of
the cables can be eliminated with zero balancing for the measure-
ment of small capacitive values in the 30 nF range:
➭
Connect the measurement cables to the instrument without a
DUT.
➭
Briefly press the multifunction key FUNC .
The instrument acknowledges zero balancing with an acoustic
signal and “
00
.
00
” (+1 digit) is displayed with blinking decimal
point. The capacitance which was measured at the moment the
key was activated serves as a reference value (max. 200 digits). It
is automatically subtracted from subsequently measured values.
Zero balancing can be deleted:
– by pressing and holding the multifunction key
FUNC , after which
deletion is acknowledged with a twice repeated acoustic signal.
– by switching the instrument off.
12 Frequency Measurement
Frequency measurement is possible in all voltage measuring ranges
in the AC and DC operating modes.
➭
Set the rotary switch to V or V .
➭
Apply the measured quantity in the same fashion as for voltage
measurement.
Observe footnote 4) on page 22.
➭
Briefly press the multifunction key FUNC .
The instrument switches to frequency measurement, and the fre-
quency is displayed at the LCD.
The lowest measurable frequencies and maximum allowable
voltages can be found in chapter 17 „Characteristic Values“.
Switching between Voltage and Frequency Measurement
Repeated brief activation of the multifunction key FUNC causes con-
tinuous alternation in the following sequence:
voltage
→
frequency
→
voltage
→
....
You can switch from frequency measurement directly back to volt-
age measurement by:
– pressing and holding the multifunction key
FUNC . This is acknowl-
edged by the instrument with a twice repeated acoustic signal.
The voltage measuring range which was last selected remains
active.
– activating the rotary switch.