Front Panel Operation
3-61
TIMER:
Use the timer to control the time interval between
measurements.
The timer can be set for an interval from 0.001 seconds
(1msec) to 999999.999 seconds with 1msec resolution.
After a measurement is triggered to start, the next measure-
ment starts at the end of the programmed timer interval. If
however, the programmed timer interval is shorter than the
time it takes to complete a single measurement, the next
measurement does not start until the previous one is done.
NOTE
Front panel TRIG key (see MANUAL) is
active with the timer selected. Pressing the
TRIG key after the completion of a
measurement starts the next measurement
(assuming the Model 2001 is programmed
for another measurement; see COUNT).
Perform the following steps to use the timer:
1. With the SELECT MEASURE SRC menu displayed,
place the cursor on TIMER and press ENTER. A mes-
sage indicating the presently set time interval (in sec-
onds) is displayed:
INTRVL = 000001.000
2. To retain the displayed timer interval, press EXIT or
ENTER. The instrument returns to the SELECT MEA-
SURE SRC menu.
3. To set a different time interval, use the cursor keys (
and ) to select the digits, and the RANGE
▲
and
▼
keys to increment and decrement the digits. Press EN-
TER when done to return to the SELECT MEASURE
SRC menu.
HOLD:
When HOLD is selected, the measure source is sup-
pressed. As a result, measuring is stopped and does not con-
tinue until HOLD is cancelled by selecting one of the other
measure source selections. Select HOLD from the SELECT
MEASURE SRC menu by placing the cursor on HOLD and
pressing ENTER. The instrument returns to the SETUP mea-
sure layer menu.
DELAY
This delay is used to hold up operation in the measure layer.
After the measure event occurs, the instrument waits until the
delay period times out (0 - 999999.999sec) before perform-
ing a device action.
COUNT
With this selection, you determine the number (count) of
measurements per scan sequence. The user programmed
count can be smaller, equal to, or larger than the number of
channels in the scan list. For example, if the scan list is made
up of four channels, you can program a count of 12. With this
count value, the instrument repeats the scan three times. An
advantage of repeating channels (rather than scans) is that
delays in the scan layer of operation are avoided. The mea-
sure delays among all 12 channels are the same.
With the SETUP measure layer menu displayed, select this
menu item by placing the cursor on COUNT and pressing
ENTER. The following menu is displayed:
MEASURE COUNT
INFINITE ENTER-CHAN-COUNT
INFINITE:
Use this selection to continuously repeat mea-
surements (and looping in the measure layer). With the
MEASURE COUNT menu displayed, select this menu item
by placing the cursor on INFINITE and pressing ENTER.
The display returns to the SETUP measure layer menu.
ENTER-CHAN-COUNT:
With this selection, the user de-
termines the number of readings per scan. You can program
the Model 2001 to measure up to 99999 times. Perform the
following steps to enter the measure count:
1. With the MEASURE COUNT menu displayed, place
the cursor on ENTER-CHAN-COUNT and press EN-
TER. A message indicating the present scan count is dis-
played:
MEASURE COUNT = 00001
2. The above measure count indicates that the instrument
will measure one time.
3. To program for a different count (1 to 99999), use the
cursor keys ( and ) to select the digits, and the
RANGE
▲
and
▼
keys to increment and decrement the
digits.
4. With desired count value displayed, press ENTER. The
display returns to the SETUP measure layer menu.
CONTROL
Use this menu item to enable or disable the source bypass.
The source bypass is used to bypass the measure event on the
first pass through the measure layer. With the SETUP mea-
sure layer menu displayed, select this menu item by placing
the cursor on CONTROL and pressing ENTER. The follow-
ing menu is displayed:
TRIGGER CONTROL
SOURCE ACCEPTOR
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