Bedienungsanleitung Fluke 8808A (Seite 56 von 100) (Englisch)

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8808A

Users Manual

3-22

Table 3-6. Second Level Operations (cont.)

Buttons Description

Q and V[1] In COMP mode, stores value on primary display as LO compare point (see

the “Using the Compare Function” section later in this manual)

Q and U[1] In COMP mode, stores value on primary display as HI compare point (see

“Using the Compare Function”)

[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:

• 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.

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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