Badger Meter ER-500 - Page 23

Setpoint 1
The setpoint is the flow value at which the output transistor changes state. It is set using the same units as the rate units.
JP1
JP2
JP3
Input Total Pulse Signal
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
Open Collector
Control Output
1 and 2
2.2
…10k
Pull-up
Resistor
V
CC
100 mA
Maximum
Internal
OUTPUT
INPUT
1 2
4 3
JP1
JP2
JP3
Input Total Pulse Signal
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
Internal
Solid State
Relay
2.2 to 10k
Pull-up
Resistor
V
CC
100 mA
Maximum
Open Collector
Control Output
1 or 2
Figure 12: Setpoint output Figure 13: Typical solid state relay connections
At the SetPt 1 prompt, press ENTER. The most significant digit of the current setting flashes. If the current setting is correct,
press ENTER to advance to the next parameter. To change the current setting, press RIGHT to advance to the first digit of the
required set point value. Press UP to increment the digit until it matches the first number of the required set point. Repeat for
all the digits the set point. Press ENTER to save the new set point and advance to the HystSP1 parameter.
Hysteresis 1
Hysteresis is used to modify how the output transistor reacts around a setpoint by taking recent history into account.
Hysteresis prevents an output from turning on and off rapidly when the programmed flow rate is at or very near the setpoint.
For example, a low flow alarm is set to activate when the flow falls below a pre-programmed point. When the flow is reduced
to the setpoint, even minute changes of flow above the setpoint turns the output off, disabling the alarm. Without hysteresis,
if the flow rate fluctuates slightly above and below the setpoint, the output rapidly cycles between on and off states. See
Figure 14. The hysteresis value is set using the same units as the rate units.
At the HystSP1 prompt, press ENTER. The most significant digit of the current setting flashes. If the current setting is correct,
press ENTER to advance to the next parameter. To change the current setting, press RIGHT to advance to the first digit of the
required hysteresis value. When the correct place is reached, press UP to increment the digit until it matches the first number
of the required hysteresis. Press RIGHT to advance to the next digit of the required hysteresis value and press UP to increment
the display digit until it matches the next digit of the required hysteresis. Repeat this step for the all the digits of the hysteresis
and then press ENTER to save the new hysteresis and advance to the next parameter.
Minimum
Flow
Maximum
Flow
Output ON
OFF Setpoint ON Setpoint
Hysteresis
Output OFF
Figure 14: Setpoint actions
Programming
DSY-PM-00028-EN-02 Page 23 February 2017