ProtEX-MAX PD8-6060 Explosion-Proof Dual-Input Meter Instruction Manual
48
Noise Filter (
filter
)
The noise filter is available for unusually noisy
signals that cause an unstable process variable
display. The noise filter averages the input signal
over a certain period. The filter level determines
the length of time over which the signal is
averaged. The filter level can be set between 2
and 199. The higher the filter level, the longer the
averaging time and so the longer it takes the
display to settle to its final value. Setting the filter
level to zero disables the filter function.
Noise Filter Bypass (bypass)
The noise filter bypass changes the behavior of the
meter so that small variations in the signal are
filtered out but large abrupt changes in the input
signal are displayed immediately. The bypass
value determines the minimum amount of signal
change to be displayed immediately. All signal
changes smaller than the bypass value are filtered
or averaged by the meter. The noise filter bypass
may be set between 0.1 and 99.9% of full scale.
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.
Modbus RTU Serial Communications (
serial
)
The meter is equipped with serial communications capability as a standard feature using Modbus RTU
Serial Communication Protocol.
The meter may be connected to a PC for initial configuration via the onboard micro USB connection. For
ongoing digital communications with a computer or other data terminal equipment, an RS-232, or RS-485
option is required; see
Ordering Information
on page 5 for details.
Warning!
Do not connect any equipment other than Precision
Digital’s expansion modules, cables, or meters to
the RJ45 M-LINK connector. Otherwise damage will
occur to the equipment and the meter.
Note: More detailed instructions are provided with each optional serial communications adapter.
Note: Refer to the ProVu® Modbus Register Tables located at www.predig.com for details.
When using more than one meter in a multi-drop mode, each meter must be provided with its own unique
address. The meter address (Slave ID) may be programmed between 1 and 247. The transmit delay may
be set between 0 and 199 ms. The parity can be set to even, odd, or none with 1 or 2 stop bits.
Changes made to the Serial menu are initialized after the MENU key is pressed or after navigating
through the t-byte parameter.
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