Program 2 Relay Settle Time; Program 3 Set Ieee Primary Address - Keithley 706 Instruction Manual

Setting or changing the date is as simple as selecting the date
format. For example, use the following procedure to set the
date in american date format for November 24.
1. Press PRGM. Selects program mode and displays Pro ?.
2. Press 1. Selects Program 1, turns off the DATE LED and
displays the following:
RUE I 171
I
3. Press ENTER. The american date format was selected in
the previous procedure. Pressing ENTER displays the date
in the american date format and turns on the DATE LED.
4. Press 1, 1,2,4, ENTER. This action programs the date for
- November 24 and displays the following:
I PY
2.9.3 Program 2 Relay Settle Time
Program 2 is used to program the amount of time
(000.005sec to 999.999sec) the relays and all the measure-
ment equipment connected to a particular channel has to set-
tle out. Do not confuse the settle time with the interval time.
The interval time is the selected time a relay is closed in a
scanning sequence. The interval time overrides the settle
time. That is, if the settle time is set to two seconds and the
interval time is set to one second the scan sequence will
operate at one second interval rate.
Therefore, the settle time must always be shorter in duration
than the interval time.
At the end of the programmed settle time the Model 706 out-
puts a negative going, lTL level pulse with a duration of
greater than 1Opec. This pulse appears at the CHANNEL
READY output. The CHANNEL READY output is BNC con-
nector located at the rear panel of the Model 706. The pur-
pose of the settle time program is to have a selectable settle
.time for all instruments connected to a particular channel.
Then the pulse that appears at the CHANNEL READY output
can be used to inform another instrument (e.g. DMM, printer
or even the Model 706) that the settle time is complete.
To initiate Program 2 use the following procedure:
1. Press PRGM. This selects the program mode and displays
Pro 1.
2. Press 2. Selects Program 2 and displays the following for
approximately 0.5 seconds.
,
SEttlEl
After the settle message is displayed, the Model 706
displays:
This displayis shown is seconds. The minimum settle time
is 000.005 seconds and the maximum settle time is
999.999 seconds. The settle time is not affected by power
up. This is because the circuitry is backed up by battery
BTlOl.
Programming the settle time is a simple procedure. For exam-
ple, use the following procedure to program the settle time to
001 .OlO seconds.
1. Press PRGM. Selects the program mode and displays
Pro 1.
2. Press 2. Selects Program 2 and displays the settle message
described in step 2 of the previous procedure. Then the
previously programmed settle time is displayed.
3. Press 0, 0, 1, 0, 1, 0, ENTER. This step loads 1.01 seconds
as the settle time on the display. Pressing ENTER pro-
grams 1.01 seconds as the settle time and the Model 706
reverts to the channel mode at the previously displayed
channel.
NOTE
Initiating a new interval time resets the settle
time counter. If the settle time is greater than the
interval time the CHANNEL READY output
pulse does not appear upon the completion of a
scanning sequence.
2.9.4 Program 3 Set IEEE Primary Address
Program 3 is used to set the primary address of the Model
706 for IEEE-488 bus operation. The primary address of the
Model 706 is factory set to 18, but it may be set to any value
between 0 and 31 via front panel Program 3. This is a conve-
nient feature that eliminates the cumbersome rear panel swit-
ches that are generally used in other instruments to set
primary address.
The primary address specified in the controller's programm-
ing language must agree with the primary address of the
Model 706. Front panel Program 3 is the only way to change
the Model 706's primary address.
NOTE
If other instrumentation is connected to the bus,
be sure that each device has a different primary
address. If the precaution is not observed, er-
ratic operations may result.
To initiate Program 3 and change the primary address to 22
use the following procedure:
1. Press PRGM. Selects the program mode and displays
Pro 1.
2. Press 3. Selects Program 3 and displays the following:
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