Fluke 8845A, User Manual

Page: 51 / 103

Front-Panel Operation
Configuring the Meter for a Measurement
3
3-9
The beeper state is stored in non-volatile memory and does not change when the Meter is
turned off or after a remote interface reset. The beeper is enabled when the Meter is
shipped from the factory.
Setting the Display Resolution
The steps for setting the Meter’s displayed resolution, varies depending on the selected
function. The dc volts, dc current and ohms functions set the resolution based on the
power line cycle (PLC) setting. AC volts, ac current, capacitance and temperature set
resolution using a low, medium or high setting.
To set the Meter’s display resolution dc volts, dc current and ohms:
1.
Press
L
to see the measurement Setup menu.
2. Press the soft key under the
RESOLUTION #DIG PLC
label to reveal the
resolution selection menu.
The soft key labels are updated with five choices.
4 DIGIT .02 PLC
5 DIGIT .2 PLC
5 DIGIT 1 PLC
6 DIGIT 10 PLC
6 DIGIT 100 PLC
These choices determine the displayed resolution (4½, 5½, and 6½ digits) and the
measurement cycle time in reference to the power line frequency in cycles (PLC)
For example, selecting
5 DIGIT 1 PLC
will display 5½ digit resolution and take
a measurement using one power line cycle A/D integrate period. For 60 Hz power, a
measurement is almost once every 60
th
of a second or 16.6666 milliseconds.
3. Press the soft key labeled with the desired resolution.
Note
Some of the faster PLC choices are not available when 2
nd
MEAS or DCV
Ratio are selected.
To set the Meter’s display resolution for ac volts, ac current, capacitance and
temperature:
1.
Press
L
to see the measurement Setup menu.
2. Press the soft key under the
RESOLUTN
label to reveal the resolution selection
menu.
Three soft key labels are updated with
HIGH
,
MEDIUM
, and
LOW
. The actual
number of digits displayed will depend on the selected function and the Meter’s
range.
3. Press the soft key labeled with the desired resolution.
Setting the AC Signal Filter
There are three ac filter settings that can be employed to help make more accurate
measurements: 3 Hz Slow, 20 Hz, and 200 Hz.
For the ac volts and ac current functions, a filter selection is available as a modifier.
Pressing the
Filter
soft key will expose a menu that allows you to select between the
three filter settings.