ST Engineering MMR3 Water Meter Reader User Manual
- June 5, 2024
- ST Engineering
Table of Contents
ST Engineering Telematics Wireless Ltd
Model: MMR3
Water Meter Reader
USER MANUAL
General description
The MMR3 is a plug-and-play RF transceiver unit operating at 916.3MHz.
The MMR3 unit collects wireless transmissions from water meters. The water
meters are compatible with the Silver Spring network. The received data is
saved in the internal memory or transmitted via RS232/USB to an external PC.
External photos
LED indicators
Tx mode IND red LED is lit when transmitting data.
Rx mode IND green LED is lit when receiving mode is enabled.
Standby mode IND orange LED is lit while in standby mode.
Technical Data
4.1 Electrical Characteristics
| Parameter | Value |
|---|---|
| Input Voltage | 120VAC ,60Hz |
| Control interface | USB, RS232 |
4.2 Radio Characteristics
Transmitter|
---|---
Parameter| Value
Transmit Frequency| 916.3MHz
Modulation| 2FSK
Modulation Coding| Manchester
Bit rate (net data rate)| 60 kbps
Peak Output power (without Antenna)| 14dBm
Sensitivity (BER 1E-3)| -95 dBm
4.3 Environmental Characteristics
| Operating Temperature | -30° C to + 70° C |
|---|---|
| Storage Temperature | -40° C to + 70° C |
| Humidity | Up to 95% |
4.4 Antenna requirement
This radio transmitter 4732A-MMR31 has been approved by ISED Canada to operate
with the antenna types listed below with the maximum permissible gain
indicated. Antenna types not included in this list that have a gain greater
than the maximum gain indicated for any type listed are strictly prohibited
from use with this device.
| Antenna manufacturer | Model no. | Gain |
|---|---|---|
| Panorama | PCX-TNC-C3G | 2dBi |
Regulation Information
FCC Part 15 Class B digital device notice
The digital circuit of this device has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates uses and
can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. Suppose this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on. In that case, the user is encouraged to try
to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
CAN ICES-3 (B)/NMB-3(B)
This Class B digital apparatus complies with Canadian ICES-003.
FCC and Industry Canada interference Notice
This device complies with Part 15 of FCC rules and with Industry Canada
license-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference received, including interference
that may cause undesired operation of the device.
FCC and Industry Canada Radiation Hazard Warning
WARNING! To comply with FCC and IC RF exposure compliance requirements,
the device should be located at a distance of at least 20 cm from all persons
during normal operation. The antennas used for this product must not be co-
located or operated in conjunction with any other antenna or transmitter.
WARNING! Changes or modifications to this equipment not expressly
approved by the party responsible for compliance (ST Engineering Telematics
Wireless Ltd.) could void the user’s authority to operate the equipment.
Revision 1.0, July 6, 2020
Copyright © Telematics Wireless Ltd.
All rights reserved
The document contains proprietary information of Telematics Wireless, Ltd.; it
is provided under a license agreement containing restrictions on use and
disclosure and is protected by copyright law.
Due to continued product development, this information may change without
notice. The information and intellectual property contained herein are
confidential between Telematics Wireless Ltd. and the client and remain the
exclusive property of Telematics Wireless Ltd. If you find any problems in the
documentation, please report them to us in writing. Telematics Wireless Ltd.
does not warrant that this document is error-free. No part of this publication
may be reproduced, stored in a retrieval system, or transmitted in any form or
by any means, electronic, mechanical, photocopying, recording, or otherwise
without the prior written permission of Telematics Wireless Ltd.