Keithley 6514, Instruction Manual

Page: 141 / 334

10-10 Limit Tests
Front panel operation
Limit test configuration
Most aspects of limit testing are configured from the limit configuration menu. When using
a component handler, the “start of test” (/STest, Test or Immediate) option is set from the arm
layer configuration menu.
Once in a menu structure, use the and keys to display menu items. Use the cursor and
and the and keys to key in values. To change polarity of a value, place the cursor on “+”
or “-” and press and . To change range for the value, place the cursor on the range symbol
and use the and keys (P = pico,
N
= nano, µ = micro, m = milli, ^ = x1, K = kilo, M = mega,
G = giga, T = tera). A menu item or value is selected by pressing ENTER.
Digital output bit patterns — An output pattern is set by selecting a decimal value (0 to 15)
that corresponds to the 4-bit BCD pattern of the output. To determine the output pattern value,
add up the decimal weight values for the desired HI lines:
For example, to set an output pattern to 0101 (lines 3 and 1 HI), set the output value to 5
(4 +1).
Limits configuration menu
The configuration menu for limits is structured as follows. Bullets denote the main items of
the menu. To access the menu, press SHIFT and then CONF-LIM.
• LIMIT 1 — Configure limit 1 test:
CONTROL
— Enable or disable limit 1 test.
HILIM — Set the HI limit (-9.999999T to +9.999999T), and set the “fail” digital out-
put bit pattern (0 to 15).
LOLIM — Set the LO limit (-9.999999T to +9.999999T), and set the “fail” digital
output bit pattern (0 to 15).
• LIMIT 2 — Configure limit 2 test:
CONTROL
— Enable or disable limit 2 test.
HILIM — Set the HI limit (-9.999999T to +9.999999T), and set the “fail” digital out-
put bit pattern (0 to 15).
LOLIM — Set the LO limit (-9.999999T to +9.999999T), and set the “fail” digital
output bit pattern (0 to 15).
• PASS — Set the digital output bit pattern for the “all tests pass” condition (0 to 15).
• DIG CLR (Digital Clear):
AUTO CLR
— Enable or disable auto-clear for the digital output.
DEL (Delay) — Set the pass/fail pattern pulse width (0 to 60 sec with 10µsec resolu-
tion).
DIGOUT — Set the digital output clear pattern (0 to 15).
Output HI Line: Out 4 Out 3 Out 2 Out 1
Decimal Weight: 8 4 2 1