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Filter control and configuration
The FILT key toggles the state of the Filter. When the Filter is enabled, the FILT annunciator
is on. When disabled, the FILT annunciator is off. The analog and digital filters can be
configured while the Filter is enabled or disabled.
Perform the following steps to configure the Filter:
1.
Select the desired function (DCV1, DCV2, TEMP1, or TEMP2).
2.
Press SHIFT and then TYPE. The present state of the analog filter (on or off) is dis-
played.
3.
If you wish to change the state of the analog filter, place the cursor on "ON" or "OFF"
and press the RANGE
keys.
4.
Press ENTER. The present state of the digital filter (on or off) is displayed.
5.
If you wish to change the state of the digital filter, place the cursor on "ON" or "OFF"
and press the RANGE
6.
Press ENTER. The present digital filter window (0.01%, 0.1%, 1%, 10%, or NONE) will
be displayed.
7.
Use the RANGE
8.
Press ENTER. The present digital filter count (1 to 100) will be displayed.
9.
If you wish to change the digital filter count, use the cursor keys and the RANGE
keys to display the desired count.
10.
Press ENTER. The present digital filter type (moving average or repeat) will be
displayed.
11.
If you wish to change the digital filter type, place the cursor on the type name and press
the RANGE
or
12.
Press ENTER. The instrument returns to the normal measurement display state.
NOTES While the Filter is enabled (FILT annunciator on), changes to the configuration take
effect as soon as they are made. With Filter disabled, (FILT annunciator off), changes
to the configuration take place when the Filter is enabled.
If both the analog and digital filters are configured to be off, the digital filter will
automatically turn on if (or when) the Filter is enabled (FILT annunciator on). This
ensures that filtering (analog and/or digital) is being applied whenever the FILT
annunciator is on.
While the filtering operation is in progress, the FILT annunciator blinks. Readings
will continue to be processed (i.e., displayed, stored, sent over the bus, sent to analog
output), but they could be questionable. When the FILT annunciator stops blinking,
the filter has settled.
Changing function or range causes the Filter to reset. The Filter then assumes the
state (enabled or disabled) and configuration for that function or range.
When both channels are being measured for Ratio, the Filter state (enabled or
disabled) and configuration for channel 1 (DCV1) is used.
Range, Digits, Rate, and Filter
or
key. Note that the cursor is controlled by the
or
key.
or
keys to display the desired window.
key.
3-11
and
or
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