Follow the warnings described in this manual with the symbols shown below.
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a speci c point.
If you must handle the unit for its installation, start-up or maintenance, the following
should be taken into consideration:
Incorrect handling or installation of the unit may result in injury to personnel as well as damage
to the unit. In particular, handling with voltages applied may result in electric shock, which may
cause death or serious injury to personnel. Defective installation or maintenance may also
lead to the risk of re.
Read the manual carefully prior to connecting the unit. Follow all installation and maintenance
instructions throughout the unit’s working life. Pay special attention to the installation standards of the National Electrical Code.
Refer to the instruction manual before using the unit
In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can
result in injury or damage to the unit and /or installations.
CIRCUTOR, SA reserves the right to modify features or the product manual without prior noti cation.
DISCLAIMER
CIRCUTOR, SA reserves the right to make modi cations to the device or the unit speci ca-
tions set out in this instruction manual without prior notice.
CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device
speci cations and the most updated manuals.
4�3�5�- SPECIAL BROADCAST COMMAND ��������������������������������������������������������� 16
5�- TECHNICAL FEATURES �����������������������������������������������������������������������������������������������18
6�- MAINTENANCE AND TECHNICAL SERVICE �������������������������������������������������������������� 20
7�- GUARANTEE ����������������������������������������������������������������������������������������������������������������� 20
8�- CE CERTIFICATE ���������������������������������������������������������������������������������������������������������� 21
4
Instruction Manual
ReadWatt
REVISION LOG
Table 1: Revision log�
DateRevisionDescription
03/14M018B01-03-14AInitial Version
04/14M018B01-03-14BChanges : Points 3.4, 4.3.4 and 5
Instruction Manual
5
ReadWatt
1�- VERIFICATION UPON RECEPTION
Check the following points when you receive the unit:
a) The unit meets the specications described in your order.
b) The unit has not suffered any damage during transport.
c) Perform an external visual inspection of the unit prior to switching it on.
d) Check that it has been delivered with the following:
- A Velcro strap to attach the unit to the energy meter with impulse emitter,
- A connection cable,
- A CD.
If any problem is noticed upon reception, immediately contact the transport
company and/or CIRCUTOR's after-sales service.
2�- PRODUCT DESCRIPTION
ReadWatt is an impulse sensor that can be attached to an energy meter verication impulse
emitter so that, through a MODBUS RTU protocol, there is an energy totaliser with the same
accuracy as the meter itself, but without physical access being necessary.
The unit features:
- 1 impulse indicator LED.
- 1 impulse output.
- RS-232 communications with MODBUS RTU protocol.
- RS-485 communications with MODBUS RTU protocol.
6
Instruction Manual
ReadWatt
3�- UNIT INSTALLATION
3.1.- PRIOR RECOMMENDATIONS
In order to use the unit safely, it is critical that individuals who handle it follow
the safety measures set out in the standards of the country where it is being
used, use the necessary personal protective equipment, and pay attention to
the various warnings indicated in this instruction manual.
The ReadWatt unit must be installed by authorised and qualied staff.
The power supply plug must be disconnected before handling, altering the connections or
replacing the unit. It is dangerous to handle the unit while it is powered.
Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal
injury and damage to installations.
The manufacturer of the unit is not responsible for any damage resulting from failure by the
user or installer to heed the warnings and/or recommendations set out in this manual, nor for
damage resulting from the use of non-original products or accessories or those made by other
manufacturers.
If an anomaly or malfunction is detected in the unit, do not use it to take any measurements.
Inspect the work area before taking any measurements. Do not take measurements in dangerous areas or where there is a risk of explosion.
Disconnect the unit from the power supply (unit and measuring system power
supply) before maintaining, repairing or handling the unit's connections.
Please contact the after-sales service if you suspect that there is an operational
fault in the unit.
The installation where the unit is connected must have an earthing and the DC
ripple voltage of the power supply cannot exceed 10%.
Instruction Manual
7
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