Precision Digital Corporation ProtEX-MAX PD8-6000, Instruction Manual

Page: 51 / 64

ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
51
Advanced Features Menu & Display Messages
Display Parameter Action/Setting
ICal
Internal source
calibration Enter internal source
calibration (used for
scaling the meter without a
signal source)
C CAL
Current
calibration Calibrate 4-20 mA current
input (internal reference
source used for scaling the
input)
C lo
Current low Calibrate low current input
(e.g. 4 mA)
C Hi
Current high Calibrate high current input
(e.g. 20 mA)
V CAL
Voltage
calibration Calibrate voltage input
V Lo
Voltage low Calibrate low voltage input
(e.g. 0 V)
V Hi
Voltage high Calibrate high voltage input
(e.g. 10 V)
Diag
Diagnostics Display parameter settings
LED t
LED test Test all LEDs
(press menu to exit test)
Info
Information
Display software number
and version
Erase
Erase Erase MeterView Pro SW
stored in meter’s memory
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. See
examples below:
Rounding
Selection Actual
Value Display
Value Actual
Value Display
Value
1 12.022 12.022 12.023 12.023
5 12.022 12.020 12.023 12.025
10 12.024 12.020 12.025 12.030
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 on-board USB connection. For
ongoing digital communications with a computer or
other data terminal equipment, use the RS-485
connection.
•
DO NOT connect any equipment to the RJ45
M-LINK connector. Otherwise damage will occur
to the equipment and the meter.
•
DO NOT disconnect the RJ45 connector located
to the left of the power terminal block. Doing so
will disable the on-board digital I/O, and the
RS-485 serial communications.
Notes:
1. Refer to the ProtEX-MAX Modbus
®
Register Tables
located at www.predig.com for details.
2. Changes made to the Serial menu are initialized after
the menu key is pressed or after navigating through the
remainder of the serial parameters (i.e. pass the t-byte
parameter).
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.