Keithley 2701, User Manual

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9-16 Limits and Digital I/O Model 2701 User’s Manual
The limits are illustrated in Figure 9-7.
Figure 9-7
Limits to sort 100
Ω
resistors (1%, 5%, and >5%)
Front Panel Operation — For front panel operation, the INSIDE beeper mode must be
used. A normal pitch beep and the message IN indicates that the resistor is within the 1%
tolerance limit (Figure 9-7). This 1% resistor belongs in Bin 1. A raspy beep and the “1”
message indicates that the resistor is >1% tolerance but <5% tolerance. This 5% resistor
belongs in Bin 2. For resistors >5%, no beep will sound. Place these resistors in Bin 3.
Remote Operation — For remote operation, make sure both Limit 1 and Limit 2 are
enabled. The following table evaluates the three possible pass/fail combinations for this
example.
Keep in mind that a fail condition must be reset before testing the next resistor. Fail can be
reset manually or automatically (see Table 9-2, CLEar command).
Limit 1 result Limit 2 result Resistor tolerance Bin assignment
Pass Pass > 1% 1
Fail Pass > 5% 2
Fail Fail >5% 3
100 W 101 W
HI1
105 W
HI2
95 W
LO2
99 W
LO1
Limit 1 (1%)
Limit 2 (5%)
LOW IN HIGH
Beep
(normal pitch)
Beep
(low pitch)
Beep
(low pitch) No Beep No Beep
2701-900-01.book Page 16 Wednesday, August 3, 2011 9:43 AM