HP 4262A Operating And Service Manual page 29

Model 4262A
Section III
** Two HIGH side terminals and two LOW
side terminals should be connected with
the shorting strap, for each configuration
of the UNKNOWN terminals. When the
UNKNOWN terminal configuration is not
appropriate, for example, shorted (C) or
open (L), display will show FAIL 1 (be¬
cause they result from different causes,
FAIL 2 or FAIL 3 are rarely displayed).
FP,l L
- • ° /
*** Setting change required is only the
underlined switch setting.
If FAIL is displayed, check the UNKNOWN ter¬
minal configurations as follows:
(1) That the two HIGH side terminals (Hour? -
Hpot)
and the two LOW side terminals
(Lcuh - Lpot)
are properly shorted.
(2) That short or open conditions properly exist
between HIGH and LOW side terminals.
(3) That GUARD terminal is isolated (open)
from both of HIGH and LOW terminals.
If FAIL is still displayed (under the above condi¬
tion), notify the nearest Hewlett-Packard office
with information detailing which combination of
settings show FAIL.
During SELF TEST, other controls are automati¬
cally set as follows:
CIRCUIT MODE. . . . SER when FUNCTION
is set to L or R/ESR.
PRL when FUNCTION
is set to C.
LOSS.D
LCR RANGE.MANUAL
D/Q RANGE.MANUAL
TRIGGER.INT
NOTE
TO ENSURE CORRECT RESULTS OF
SELF-TEST OPERATION IN L AND R
MEASUREMENT FUNCTIONS, CON¬
NECT ALL (HIGH AND LOW SIDE) UN¬
KNOWN TERMINALS TOGETHER WITH
A LOW IMPEDANCE STRAP (IF THIS
SHORT-CIRCUIT IS MADE AT THE
ENDS OF THE TEST LEADS, COR¬
RECT RESULTS MAY NOT OCCUR).
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