Precision Digital Corporation ProtEX-MAX PD8-6300, Instruction Manual

Page: 51 / 64

PD8-6300 Pulse Input Rate/Totalizer, Counter & Tachometer
Instruction Manual
51
Gate Function (
Gate
)
The gate function is used for displaying slow pulse
rates. Using the programmable gate, the meter is able
to display pulse rates as slow as 1 pulse every 999.9
seconds (0.001 Hz). The gate function can also be
used to obtain a steady display reading with a
fluctuating input signal.
The gate function (
Gate
) is the first option in the
Advanced Features menu. There are two settings for
the
Gate
, low gate (
Lo G
) and high gate (
Hi G
).
Low Gate (
Lo G
)
For most applications, low gate setting should be left
at 1.0 second. Increase low gate setting to obtain a
steadier rate display. The rate display will update in
accordance with the low gate setting, for example if
low gate is set at 10.0, the display will update every
10 seconds; changes in rate between updates will not
be reflected until next display update.
High Gate (
Hi G
)
Set the high gate value to correspond to the highest
expected pulse period (lowest pulse rate). For
instance, if the meter must display a rate when there
is 1 pulse coming into the meter every 10 seconds,
set the high gate to 11.0 seconds. When the signal is
removed from the meter, the display will show the last
reading for 11 seconds; then it will read zero.
Gate Settings
Slow Pulse Rate
Low Gate* (sec) High Gate (sec) Min Freq** (Hz)
1.0 2.0 0.5000
1.0 10.0 0.1000
1.0 20.0 0.0500
1.0 100.0 0.0100
1.0 200.0 0.0050
1.0 400.0 0.0025
1.0 800.0 0.0012
1.0 999.9 0.0010
*The low gate setting corresponds to the display update
rate and is used to stabilize the display reading with a
fluctuating signal.
**The minimum frequency is dependent on high gate
setting.
Contact De-Bounce Filter (
FiLter
)
The filter function (
FiLter
) can be used for
applications where the meter is set up to count pulses
generated by switch contacts. The filter value can be
set anywhere between 2 and 50, the higher the value,
the greater the filtering.
The filter function (
Filter
) is the second option in the
Advanced Features menu. There are two settings,
Hi SPd
(high speed) and
Lo SPd
(low speed), press
ENTER when
Lo SPd
is displayed to enable the filter
function. Program the filter value, so that there are no
extra counts when a contact closure is completed.
Filter Settings
Contact De-Bounce Filter
Filter Setting Speed Setting Max Freq (Hz)
2 Lo SPd 999
4 Lo SPd 499
8 Lo SPd 249
16 Lo SPd 124
32 Lo SPd 62
40 Lo SPd 50
50 Lo SPd 40
N/A Hi SPd 30,000
Rounding Feature (
round
)
The rounding feature is used to give the user a
steadier display with fluctuating signals. Rounding is
used in addition to the filter function.
Rounding causes the display to round to the nearest
value according to the rounding selected. This setting
affects the last two digits, regardless of decimal point
position.