Compare Function (Comp); Setting The Compare Range; Using The Compare Function; List And Number Editors - Fluke 8808A User Manual

8808A
Users Manual
Buttons
Q V
and
Q U
and
[1] Hold both buttons for 2 seconds.

Compare Function (COMP)

The Meter has a compare function (COMP) that provides an easy way to determine if a
reading falls within a designated range of values. The compare function can be used with
any function modifier.

Setting the Compare Range

Before selecting the compare function, you need to set the tolerance range against which
the reading that will be compared. This can be done in any of the following three ways:
•
•
•

Using the Compare Function

To select the compare function, press C. When the compare function is first selected,
the Touch Hold function is also activated and H is displayed. To turn off Touch
Hold, press and hold I for 2 seconds. The secondary display will then update with
each new reading.
When a stable value is detected, the Meter beeps if hold is on and the reading is shown in
the primary display. If the value is within the range you set, PASS is shown in the
secondary display. If the value is not within the set range, HI or L0 is shown as applicable
in the secondary display.

List and Number Editors

The Meter has a list editor and number editor. The list editor allows you to scroll through
and select from a list of options. The number editor allows you to enter or edit a numeric
value.
Editing is performed in the primary display. Normal operation of the Meter is interrupted
when either editor is invoked. If a computer interface command is received by the Meter
during editing, the edit is aborted and the Meter returns to normal operation. The item
being edited is not changed.
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Table 3-6. Second Level Operations (cont.)
[1]
In COMP mode, stores value on primary display as LO compare point (see
the "Using the Compare Function" section later in this manual)
[1]
In COMP mode, stores value on primary display as HI compare point (see

"Using the Compare Function")

Press C to enter the compare function mode. The reading displayed when you
enter the mode can be set to the high or low threshold. To set the reading as the
high limit, press and hold Sand U for 2 seconds. To set the reading as the
low limit, press and hold Sand V for 2 seconds. The Meter beeps to
indicate the limit has been set. If the display is blank or shows 0L (overload), the
limit could not be set and the high and low limits remain as previously set.
Use the number editor as described in the "Using the Number Editor" section
later in the chapter. (Before entering the number editor, be sure you are in the
appropriate range.) The decimal point and input range are fixed according to the
range in the editor.
Use the computer interface commands COMPHI and COMPLO to set the high and
low compare points remotely. See the "Compare Commands and Queries"
section in Chapter 4.
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