INTRODUCTION
The ER-500 flow monitor incorporates state-of-the-art digital signal processing technology designed to provide the user with
exceptional flexibility at a very affordable price. Though designed for use with Badger Meter® flow sensors, this monitor can
be used with almost any flow sensor producing a low amplitude AC output or contact closure signal.
The ER-500 monitor uses contact closures from an ILR transmitter that translates to flow rate through the use of a scaling
constant called a K-factor.
This monitor is also capable of accepting low-level frequency input signals typically found in flow sensors that generate
a frequency output. The output signal for these type of sensors is a frequency proportional to the rate of flow. The ER-500
monitor uses the frequency information to calculate flow rate and total flow. If required, the flow monitor can easily be
re-configured in the field.
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
+ –
KB/Display
J1
TB1
JP1
JP2
JP3
P2
Input Total Pulse Signal
P1
Mag
Pulse
Iso
OC
Low
High
2
1
Figure 1: ER-500 monitor
The monitor is available in two different levels of functionality. The standard model provides all the functions necessary for
the most common flow metering applications. The advanced version adds communications capabilities over an RS485 bus
using Modbus RTU and control outputs.
Introduction
DSY-PM-00028-EN-02Page 6 February 2017
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