Keithley 706 Instruction Manual page 28

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A. Select desired new channel and press LAST.
B. Activate Program 99.
NOTE
Powering the unit down will not change the
designated last channel.
If the presently displayed channel is designated as the first
and last channel the display format is as follows:
I IU FLol
I
I
where:
- -30 = Present Channel
F = First Channel
L = Last Channel
o = Channel Open
4. CONTROL-The
CONTROL group of buttons consist of
the RESET button and the INTERVAL button. The buttons
and their functions are described as follows:
RESET-Actuation
of the RESET button opens all chan-
nels of the Model 706 and reverts the display to the
designated first channel. Actuating the RESET button dur-
ing a single or continuous scan mode sequence stops the
scan sequence, opens all channels and reverts the display
to the designated first channel. The RESET button is inac-
tive in the time, date, interval and Programs 8, 90, 91, 92
and 99.
INTERVAL-The
INTERVAL button selects the program-
med interval time for display. The interval time is the pro-
grammed time each channel is closed when using the step,
single or continuous scan mode. The interval time ranges
from 000.010 seconds to 999.999 seconds. Upon the ac-
tuation of front panel Program 99 the interval time is
reverted to the default condition of 000.010. Powering the
unit down will not change the programmed interval time.
.
There are two ways the interval time can be changed and
they are as follows:
A. Activate Program 99 (resets to 000.010).
B. Press the INTERVAL button and then press the ap-
propriate number from 000.010 to 999.999.
Press
ENTER.
5. DATA-The
DATA group of buttons consist of the O-9,
CANCEL and ENTER buttons.
They are described as
follows:
step
1
2
3
O-g-The O-3 data keys allow entry of numerical data onto
the display. The O-9 keys can be used to enter numerical
constants on the display for certain functions such as inter-
val time, channel number, front panel programs, time and
date.
ENTER-Upon
actuation,
the ENTER button loads the
displayed data for channel number, interval time, time,
date and program modes into the Model 706. In the pro-
gram mode, the ENTER button initiates the selected pro-
gram (O-7) after the necessary data is entered onto the
display.
CANCEL-During
the entry of data (C segment cursor is
flashing) the CANCEL button cancels the present display
and- reverts the instrument to the previous display. The
CANCEL button is functional only when entering data on-
to the display in the channel, interval, time, date and pro-
gram modes.
Refer to Table 2-16 for an example of the CANCEL button
function.
In Table 2-16 the interval display mode is selcted and a 120
second interval time is entered onto the display. For some
reason or other the interval time in step 2 is an error so the
CANCEL button was pressed to revert the display to the
previously programmed interval time.
6. SCAN-The
SCAN group of buttons consists of SINGLE,
CONTINUOUS,
and START/STOP
buttons. These three
buttons select the different scan modes and are described
as follows:
CONTINUOUS-Actuation
of the CONTINUOUS button
selects the continuous scan mode and turns on the con-
tinuous LED. The continuous scan mode allows the user to
scan through the programmed channels at the programm-
ed interval rate, continuously.
The continuous scan mode
is initiated upon the actuation of the START/STOP
button
or upon receiving the appropriate external trigger pulse.
Pressing the START/STOP
button during a continuous
scan sequence stops the scan at the presently displayed
channel. To continue the scan sequence simply press the
START/STOP
button.
Table 2-16. CANCEL Function
Example
Action
Comments
Press INTERVAL.
Selects interval display mode and turns on
the INTERVAL LED.
Press 1, 2, 0, 0, 0, 0.
Enters 120 second interval time on the display.
Press CANCEL.
Reverts the interval time data of step 2 to
the previously programmed interval time.
2-16

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