HRI-Mei sensor reading device is a data interface for pulse output for industrial water meters. It provides a high-resolution pulse output with a flow direction signal. The data interface can be used for M-Bus applications. Designed for industrial water meters like MeiStream and MeiTwin, the HRI-Mei can be retrofitted without breaking your meter’s metrological seal. It is also built to withstand harsh environments, like flooded pits.
The HRI-Mei is a data capture device for MeiStream an MeiTwin MID bulk water meters. All MeiStream standard registers are prepared to receive the HRIMei. The HRI-Mei can also be mounted afterwards without breaking the meter’s seal. The HRI-Mei provides a high resolution pulse output with water flow direction detection. Also the data interface can be used for M-Bus applications. With the HRI-Mei all known data interfaces with Encoder, Electronic and Hybrid registers can be replaced. Depending on the register a second pulser like the Opto OD can be plugged in additionally e.g. at the MeiStream. Also other applications requiring reed switches or optical pulse outputs can be supported with only this one data capture device.
Meter reading based for billing purposes i.e. mobile reading systems.
Meter remote reading and profiling via cable fixed networks with M-Bus, radio modem or GSM network.
Industrial control applications with the FM-1D/K or FM-2D/K
Data logging in conjunction with various data loggers; i.e. CDL.
Logging and transfer of flow profiles e. g. when using Waterbox internet access.
Robust design allows the use of the HRI-Mei in harsh environments like flooded pits.
The HRI-Mei provides 4 different pulse output modes via 2 lines. Parallel usage of the pulse output and serial output is not recommended and may cause problems depending on the application.
I1: Forward pulses
I2: Backward pulses
I1: For-/Backward pulses
I2: signal for the flow direction (1)
l1: balanced pulses (2)
l2: Alarm (opens when there is an alarm or cable cut) (3)
Opto-OD (NAMUR) pulse output (6 ms)
I1: pulses with flow direction code
I2: not used
HRI-Mei standard for cold water (30 °C) and warm water (50 °C).
Environmental temperature range: -10 °C ... +60 °C
(1) Ground level means reverse flow
(2) Backward pulses are compensated by suppressing the same quantity of forward pulses
(3) Alarms can be programmed for broken pipe, leakage, tampering, cable cut and indicated by ground level at the output
According to pulse mode
Opto-OD (NAMUR) compatible:
programmable pulse weights (10, 25,....1000) litre/pulse
Pulse length 6ms
NAMUR acc. EN 60947-5-6
Reed-RD compatible:
programmable pulse weights (10, 25,....10000) litre/pulse
Pulse length 32, 128 or 500ms
max. Voltage 48 Vdc
max. current 0,2 A
max. switching capacity 4 W
M-Bus (autodetected)
Autom. detection of baud rate (300/2400Bd) and type of interface.
Data protocol according IEC870-5/EN1434-3
An Encoder mode provides an easy to use data protocol compatible to the encoder registers.
Meter index
Fabrication number
Meter ID. equivalent to secondary address
Monthly meter index for programmable day
Meter index for programmable yearly key date and for the year before
Min./max. water flow with date/time
Backward water volume with date/time
Broken pipe and leakage detection with programmable flow thresholds
Tamper detection (*)
The HRI-Mei can be programmed to transfer selected information.
All changeable data can be set with MiniCom software via the M-Bus / MiniBus data interface.
MiniCom download is free of charge from the Sensus web site.
(*) Requires tamper target at the meter.
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