Flow 20 mA*
When the display is operated using loop power, the flow rate that corresponds to 20 mA must be set. This setting normally
represents the maximum rate of the flow sensor connected to the display but other entries are possible.
At the Fl=20mA prompt, press ENTER. The first digit of the current setting flashes. If the current setting is correct, press ENTER
to advance to the next parameter. If the current setting requires a change, press UP to increment the display digit until it
matches the first digit of the required maximum flow value. Press RIGHT to advance to the next digit. Repeat for all of the
maximum flow at 20 mA digits. Press ENTER to save and advance to the 4-20Cal parameter.
OTE:N In Programming mode, the monitor advances to the Clr G-T parameter. See Clear Grand Total* on page 24.
4-20 mA Calibration
This setting allows the fine adjustment of the Digital to Analog Converter (DAC) that controls 4…20 mA output. The
4…20 mA output is calibrated at the factory and under most circumstances does not need to be adjusted. If the output needs
to be adjusted for any reason the 4…20 mA calibration procedure is used.
At the 4-20Cal prompt, press ENTER. The monitor displays No. If you do not need to complete the 4…20 mA calibration, press
ENTER to advance to the Linear parameter. See Linearization on page 21. To complete the 4…20 mA calibration, press UP or
RIGHT to change the display to Yes. Press ENTER to advance to the 4mA Out parameter.
4 mA Adjustment
To set the 4mA Out value, connect an ammeter in series with the loop power supply as shown in Figure 11. 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.
P1
Freq. In
4-20mA
Iso Total Pluse
TR_B
TR_A
RS485 Gnd
Setpoint 1
Setpoint 2
Gnd
+
–
Total Reset
OC Total Pluse
Signal Gnd
TB1
Mag
Pulse
Iso
OC
Low
High
+
+
–
–
Input Total Pulse Signal
JP1
JP2
JP3
4-20 mA
Current Loop
(10…28V DC)
POWER
SUPPLY
10A MAX
FUSED
400mA
FUSED
CAT III
1000V
HOLD MIN MAX REL
Hz % ms RANGE
AutoHOLD FAST MIN MX LOGGING YES
CANCEL SAVE NO
SETUP
µA
mA
A
W
V
TEMPERATURE
COM
OFF
nS
W
VIEW MEM
CLEAR MEM
V
dB
mV
dB
ac+dc
V
ac+dc
A
mA
mV
ac+dc
mA
A
µA
ac+dc
µA
°C
°F
MEM
HM
MS
51000
AUTO
MANUAL
%
FAST MAX MIN AVG
0 0
LOG
HOLD
Figure 11: 4-20 mA calibration setup
20 mA Adjustment
The 20 mA adjustment is performed using the same procedure as the 4 mA adjustment.
4-20 mA Test
The ER-500 monitor contains a diagnostic routine that allows the simulation of mA output values between 4 …20 to check
output tracking. At the 4-20Tst prompt, the current flashes. Press UP to increase the simulated mA output in increments of
1 mA. Press RIGHT to decrease the mA output. 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 Press ENTER when the monitor is in test mode to exit the test mode and move on to the next
programming parameter.
Programming
DSY-PM-00028-EN-02Page 20 February 2017
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