Split-Type Residential Prepaid Water Meters with RF Communication
and Electronic Latched Valve
The CA568-R series represents an upgrade from the CAW-C series. It
operates according to the STS (Standard Transfer Specification)
standard and utilizes radio frequency (RF) wireless communication.
The meter incorporates a low-power, bistable latched valve powered
by a battery, capable of opening and closing up to 4 million times
throughout its battery lifespan. With the CAW-C series, users
benefit from consistently accurate meter readings and robust
revenue protection. Furthermore, the electronic components of the
meter are potted and sealed above the metering chamber, isolating
them from water exposure, which significantly enhances the meter's
reliability.
The meter communicates wirelessly via RF with a Customer Interface
Unit (CIU). The CIU is installed within the customer's home, while
the meter itself is housed in a cabinet located away from the
residence. The STS decryption process occurs within the meter, and
the CIU provides a user-friendly interface for the customer. The
CIU's Liquid Crystal Display (LCD) can show information such as
token acceptance or rejection, credit status, and historical usage
data. This split design ensures the meter is immune to tampering or
fraud targeting the CIU.
To top up or recharge the water meter, a consumer simply needs to
purchase a 20-digit credit token from a vendor and enter the code
using the CIU. Through our comprehensive range of prepaid vending
solutions, a utility or service provider can efficiently manage the
CA568 series water meters alongside STS prepaid electricity meters
within a single vending system.
Features:
- Qn 1.5 Class B capacity is more than sufficient for typical
household daily usage.
- Available in sizes DN15, DN20, and DN25.
- Features contactless read/write RFID transponder technology.
- Operates with a separate in-home CIU (Customer Interface Unit).
- Includes a counter register and a large character LCD display.
- Electronics are potted, making the meter water-resistant for humid
and tropical environments.
- Tamper and fraud resistant.
- Provides a low credit warning.
- Capable of retaining data for over 10 years without power.
- Prepared for optional AMR functions via RF, MODBUS, and RS485
interfaces.
Key Benefits:
a) Quick and easy installation, suitable for both new installations
and retrofits.
b) Supports multi-rate tariffs and records usage on a Time-of-Use
(TOU) basis.
c) Potted electronics provide water resistance, adapting well to
humid and tropical environments.
d) Vending software allows configuration for free basic water,
emergency credit, and low credit warnings.
e) Supports drive-by reading and fully automated reading for AMI
smart metering applications.
f) Enables remote reading and valve control (on/off).
g) Reduces operational and inventory costs.
Specifications:
| Nominal size | Dn | mm | in-line |
|---|
| 15 | 20 | 25 |
|
| Maximum flow rate | Q4 | m3/h | 3.125 | 5.0 | 7.875 |
| Ratio "R" | Q3/Q1 |
| 100 | 100 | 100 |
| Permanent l flow rate | Q33 | m3/h | 2.5 | 4.0 | 6.3 |
| Transitional flow rate | Q22 | 0.05 | 0.08 | 0.126 |
|
| Minimum flow rate | Q11 | 0.031 | 0.05 | 0.0787 |
|
| Minimum reading | m3 | 0.0005 |
|
| Maximum reading | 99999 |
|
|
Maximum Permission Error (MPE)
Q1≦Q≦,Q2 MPE =_+_ 5%
Q2≦Q≦Q4, MPE= _+_ 2% (For hot water metering, MPE=_+_ 3%)
Dimensions and diagram
| Nominal size | Length | Width | Height | Thread |
|---|
| mm | D |
|
|
|
| 15 | 165 | 101 | 124 | G3/4B |
| 20 | 195 | 101 | 124 | G1B |
| 25 | 225 | 101 | 124 | G5/4B |
