HP 4262A Operating And Service Manual page 39

Model 4262A
Section III
Figure 3-6
MEASUREMENT PROCEDURE FOR GENERAL COMPONENTS
DC POWER SUPPLY
Remove shorting bar connections between high terminals and between low terminals (all
terminals are now isolated from each other). Connect 16061A Test Fixture to 4262A
UNKNOWN terminals.
User constructed test fixture may also be
connected. Guard terminal is sometimes used
in small capacitance measurements.
2. Depress LINE button to turn instrument on. An initial display test is automatically per¬
formed before measurement begins.
3. Check that 4262A trigger lamp begins to flash. The 4262A control functions are auto¬
matically set as follows {automatic initial settings):
DC BIAS. OFF
SELF TEST. .OFF
CIRCUIT MODE.AUTO
FUNCTION.. . . . C
LCR RANGE.AUTO
LOSS.D
DQ RANGE.AUTO
TEST SIGNAL.1kHz
TRIGGER. INT
To check fundamental operating conditions of
the instrument, perform SELF TEST (refer to
Paragraph 3-5 for SELF TEST details). Press
SELF TEST button again to release the function.
4. Rotate C ZERO ADJ control until capacitance readout is 000 counts on LCR DISPLAY
(minus sign should not appear).
5. Connect a shorting lead to Test Fixture to short-circuit the Unknown terminals to zero
ohms (zero microhenries).
6. Press L FUNCTION button.
Figure 3-7. General Component Measurements (Sheet 1 of 3).
3-15