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2620A/2625A
Users Manual
xiv
Note
You cannot activate the Monitor function if the selected channel is set up
as OFF; the instrument gives a long beep and ignores your request.
The "MON" annunciator comes on, and the instrument starts taking measurements on the
selected channel. If you haven’t connected the input leads to a signal, the instrument
simply displays a nominal noise reading; on channels set up to measure resistance, "OL"
is displayed for overload. (The instrument also displays "OL", or "otc" for open
thermocouple, when attempting to measure temperatures on channels to which no sensor
has been connected.)
Press G, D to scroll through other channels and take additional measurements. Note
that the instrument automatically skips over channels that are not set up (i.e., those
channels still set to "OFF").
Press M to deactivate the Monitor function when you’re through. ( M toggles the
Monitor function on and off.)
Next, press Q to activate the Scan function. The "Scan" annunciator comes on, and the
instrument begins taking measurements on all the channels you’ve set up.
When the scan completes, the instrument normally then counts down the time interval
remaining until the next scan is due. (the countdown appears on the right display.)
However, if you performed a Configuration Reset, then the scan interval has been set
back to 0:00:00. Under this condition, the instrument performs continuous scanning.
Subsequent sections of the manual explain how to change the scan interval.
Even with the scan function on, you can still use the Monitor function to watch a
channel:
Press M to activate the Monitor function.
Press G, D to change the monitor channel, as desired. (The instrument continues to
take scan measurements in the background.)
Press M to deactivate the Monitor function when you are through.
Similarly, press Q to deactivate the Scan function when you are through.
Viewing Minimum, Maximum, and Last Data Values
While taking scan measurements, the instrument also collects Minimum, Maximum and
Last values for each channel. These values are stored in the "Review Array." You can
examine the data in the Review array when the instrument is in Active Mode or Inactive
Mode. If you are in Active Mode, (i.e. the Scan and/or Monitor functions are on), the
instrument will continue to take measurements in the background while you examine the
Review data.
Press N to call up the Review array onto the display.
Use the four arrow buttons to examine different entries in the Review array. The arrow
buttons move around in the Review array, as illustrated below.