HP 4262A Operating And Service Manual page 26

Section III
Figure 3-1
Model 4262A
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LINE ON/OFF switch: Turns instrument
on and readies instrument for measurement
Circuit Mode Indicator: LED lamp, next to
equivalent measuring circuit being used,
lights. Sample connected to UNKNOWN
terminals © is measured in an equivalent
circuit selected by FUNCTION © and
CIRCUIT MODE ® switches and is indi¬
cated by appropriate LED lamp. Equivalent
circuits are shown as electronic circuit sym¬
bols at the left of indicator lamps. Desired
circuit parameter of component is meas¬
ured in one of the following selected circuit
modes:
Parallel capacitance i _i i_ I
Parallel resistance
Series capacitance
Series resistance
Parallel inductance
Series inductance
Series resistance
© Trigger Lamp: Turns on during sample
measuring period. Turns off during period
when instrument is not taking measure¬
ment (or hold period). There is one tum-
on-and-off cycle per measurement. This
lamp turns on and off repeatedly when
TRIGGER (J) is set to INT.
H
CD b
HHAV-
H
CD b
LCR Display: Inductance, capacitance or
resistance value including the decimal point
and unit is displayed in 3-l/z digit decimal
number from 0000 to 1999. If the sample
value exceeds 1999 in a selected range,
OF(Over-Flow)appears in this display. This
display also shows PASS or FAIL when
SELF TEST is performed,
D/Q Indicator: In a capacitance or induct¬
ance measurement, this indicator indicates
which of D (dissipation factor) or Q (quali¬
ty factor) is displayed in D/Q display©).
In resistance measurement, this indicatoris
also lit (however, D or Q indication has no
meaning and D/Q display © is left blank).
D/Q Display: Value for dissipation factor
or quality factor is displayed in capacitance
and/or inductance measurement. In resis¬
tance measurement, this display is kept
blank.
RANGE Indicator: The range automati¬
cally or manually selected is indicated by
LED lamp. The table printed above the
LED array shows the measurement ranges
of the Model 4262A.
TEST SIGNAL These pushbuttons enable
selection of measurement frequency—
120Hz, 1kHz or 10kHz and that of low test
voltage of the signal applied to sample to
be tested. LOW LEVEL switch is effective
only in parallel capacitance measurements,
supplying a test voltage of SOmVrms. For
units equipped with option 010, arrow on
pushbutton (120Hz) points to 100Hz.
3-2
Figure 3-1. Front Panel Features (sheet 1 of 2).