Model 2700 Multimeter/Switch System User’s Manual Scanning 7-19
Monitor can be used with limit testing to trigger the start of a scan. When the monitor
detects that a set reading limit has been reached, the scan is triggered to start. The detailed
procedure to perform a monitor scan is provided in “
Scan operation — Monitor scan,”
page 7-36.”
NOTE An overflow reading (“OVRFLW” message displayed) is interpreted by the
Model
2700 as a positive reading, even if the input signal is negative. This could
inadvertently trigger a monitor scan (see “
Scan operation — Monitor scan,”
page 7-36).
The monitor channel must be a channel that is in the scan list. If the monitor
channel is removed from the scan list, the lowest channel in the scan list will
become the monitor channel.
To set monitor, the instrument can be in the normal measurement state or enabled while in
the advanced scan menu. There are two methods to select a monitor channel; method 1
selects it while a channel is closed, and method 2 selects it with no channels closed.
NOTE The monitor channel must be a channel that is in the scan list.
Method 1:
1. Use the CLOSE key or the and keys to close the channel that you want to be
the monitor.
2. Press SHIFT and then MONITOR (MON annunciator turns on).
Method 2:
1. If a channel is closed, press OPEN to open it.
2. Press SHIFT and then MONITOR.
3. Use the , , Δ, and ∇ keys to display the monitor channel (i.e., MONITOR
101), and press ENTER. The monitor channel closes and the MON annunciator
turns on.
To disable monitor, again press SHIFT and then MONITOR (MON annunciator turns off).
Once enabled, you can change the monitor channel using the CLOSE key or the and
keys. If you open the monitor channel, the monitor does not disable but it does become
inactive (MON annunciator turns off). When a channel is closed, monitor becomes active
(MON annunciator turns on).
While in the normal measurement state, the present monitor channel dictates which
channel in the scan list is the monitor. Therefore, if you change the monitor channel, the
scan list monitor channel also changes.
When you change the monitor channel while in the normal measurement state, the
instrument setup does not change. If you want the monitor channel to assume the setup of
the scan list channel, you must disable the monitor and then re-enable it.
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