Programming
Page 32
May 2020
DSY-PM-01378-EN-08
4 mA Adjustment
To set the 4 mA value, connect an ammeter in series with the loop power supply as shown
in
� The 4 mA DAC setting is typically 35…50� At the
4mA Out
prompt,
press
UP
to increase or
RIGHT
to decrease the current output while monitoring the
ammeter� When a steady 4 mA reading is established on the ammeter, press
ENTER
on the
monitor to save the output and advance to the
20mAOut
parameter�
20 mA Adjustment
The 20 mA adjustment is performed using the same procedure as the 4 mA adjustment�
4…20 mA Test
The 4…20 mA test simulates the mA output values between 4…20 to check output
tracking� At the
4-20 Test
prompt the current output flashes� Press
UP
to increase the
simulated mA output or
RIGHT
to decrease in increments of 1 mA� The ammeter should
track the simulated mA output� If a 4…20 mA test is not necessary, press
ENTER
to advance
to the
Linear
parameter�
OTE:
N
Pressing
ENTER
when the monitor is in
Test
mode exits the test mode and moves
on to the next programming parameter�
Linearization
To increase accuracy, linearize the monitor� The linearization function accepts a maximum
of ten points and requires additional calibration data from the meter being used with the
monitor� Typically, calibration information can be obtained in three, five and ten points from
the flow meter’s manufacturer� If linearization is not needed, press
RIGHT
to advance to the
Modbus parameter� See
� To complete linearization, press
ENTER
at
the
Linear
prompt� The meter advances to the
Lin Pts
parameter�
Number of Points
The Lin Pts value displays� If the number of points is set to 0, linearization is disabled� Press
ENTER
� The most significant digit of the number of points entry begins to flash� The first
number can be 1 or 0 only� Press
UP
to change the first digit� Press
RIGHT
to move to the
least significant digit�
OTE:
N
If the number you enter is out of range, the display flashes
Limit
and refuses
the entry�
Press
ENTER
to advance to the
Freq#1
prompt�
OTE:
N
If the number of linear points is set to 1 the B2900 monitor assumes you are
entering the maximum frequency and coefficient� Further, the meter assumes
that the implied first point is at a frequency of 0 Hz and a coefficient of 0�
Frequency
At the
Freq#1
prompt, press
ENTER
� The first digit of the first linear point’s frequency input
flashes� Press
UP
to increment the numerical values and
RIGHT
to change the position of
the number being entered� When the frequency value input is complete, press
ENTER
to
advance to the
Coef#1
parameter�
