E-RM 30
Installation and service manual
M2016/09f[EN]
2. D
ESCRIPTION
Radio module E-RM 30 is intended for record of data about consumed water – measured by mechanical
water meter – and for remote reading of these data. Mechanical water meter is equipped with rotating
circular disc with reflecting sector. Radio module permanently scan the surface of the disc – its speed and
rirection of rotation. Amount of consumed water is recorded and also direction of flow )forward flow or
backflow).
Radio module E-RM does not dispose of display – is equipped with IR interface with bi-birectional
communication. Via this interface it is possible to set module parameters, switch between operational modes,
get informations about set parameters, module functions and measured values (e.g. chapter 5.2. Reading
data, defining parameters and operating modes a 5.3. Change of operation mode).
Some models of the E-RM 30 (e.g. chapter 2.1. Type list) are able to detect attempts to manipulate the water
meter by using an external magnetic field (for example by using a magnet). The actual transfer of data
between the water meter and the radio module is based on an optical principle (just like the radio module
itself) and is therefore not affected by a magnetic field.
The radio module is equipped with electronic seals (and also the option to use mechanical seals) in order to
safeguard the module from tampering. If there is an unauthorised removal of the module from the meter, the
device records and stores the date of the offence and transmits this information by radio signal. The unit
remains in operating mode and after re-activation and re-setting it continues to measure the flow in the water
meter.
2.1. T
YPE
LIST
Radio modules E-RM 30 are produced in several types, which are divergent in water meter made for,
antenna size and skill of magnetic field detection.
The type with short antenna (about 15mm) is determined to places where is not possible to use a standard
one. Due to the low signal is recommended - if it is possible – to use a module with standard antenna.
Type
Water meter
Antenna
Biling period
Calculat. battery
lifetime (year)
Magnetic field
detection
E-RM 30.101
GSD8-RF
standard
year
6+1 (reserve)
-
E-RM 30.102
month
E-RM 30.111
short
year
E-RM 30.112
month
E-RM 30.201
JS
standard
year
6+1 (reserve)
-
E-RM 30.202
month
E-RM 30.211
short
year
E-RM 30.212
month
E-RM 30.301
JS
standard
year
10+1 (reserve)
●
E-RM 30.302
month
Warning!
Radio modules are determined just for one water meter type. You CAN´T use it for another type. For
example radio module E-RM 30.101 must not be used for water meter JS. The manufacturer
assumes no liability for measurement mistakes caused by water meter substitation.
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