P
RO
V
U
™ PD7000 Temperature Meter
Instruction Manual
32
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. On this P
RO
V
U
model, the valid settings are
1, 2, 5, and 10 (only).
Modbus RTU Serial
Communications (
serial
)
The meter is equipped with serial communications
capability as a standard feature using the 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
6
for details.
•
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 have its own unique Slave
ID or meter address. The ID or address 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.
Select Menu (
SElect
)
The
Select
menu is used to program the analog
output parameters. There are no other selections for
this model.
Analog Output Programming
(
AoutPr
)
The
Analog Output Programming
menu is used to
program the behavior of the 4-20 mA output. The
following parameters and functions are programmed
in this menu:
1. Source: Source for generating the 4-20 mA
output (e.g. PV - temperature)
2. Overrange: Analog output value with display in
overrange condition
3.
Underrange: Analog output value with display in
underrange condition
4. Break: Analog output value when input break is
detected
5. Max: Maximum analog output value allowed
regardless of input
6. Min: Minimum analog output value allowed
regardless of input
7. Calibrate: Calibrate the internal 4-20 mA source
reference used to scale the 4-20 mA output
Analog Output Source
The source for generating the 4-20 mA output may be
assigned to the process variable, maximum or
minimum value reached by the process, one of the
set points, or the Modbus PV input.
