DMMetering PRO-1250 Series User manual

® 2007
PRO – 1250 SERIES
DIN rail three phase four wire energy meter
1.1 Safety instruction
1.2 Foreword
1.3 erformance criteria
1.4 Specifications
1.5 Basic errors
1.6 Description
1.7 Dimensions
1.8 Installation
1.9 Operating
1.10 Troubleshooting
1.11 Technical support
User manual

® 2007
1.1 Safety instructions
Information for Your Own Safety
This manual does not contain all of the safety measures for operation of the equipment
(module, device), because special operating conditions, and local code requirements or
regulations may necessitate further measures. However, it does contain information
which must be read for your personal safety and to avoid material damages. This
information is highlighted by a warning triangle and is represented as follows,
depending on the degree of potential danger.
Warnin
This means that failure to observe the instruction can result in death, serious injury or
considerable material damage.
Caution
This means hazard of electric shock and failure to take the necessary safety
precautions will result in death, serious injury or considerable material damage.
Qualified personnel
Commissioning and operation of the equipment (module, device) described in this
manual may only be performed by qualified personnel. Qualified personnel in the sense
of the safety information contained in this manual are persons who are authorized to
commission, start up, ground and label devices, systems and circuits according to
safety and Regulatory standards.
Use for the intended purpose
The equipment (device, module) may only be used for the application cases specified in
the catalogue and the user manual and only in connection with devices and
components recommended and approved by DMMetering.
Proper handlin
The prerequisites for perfect, reliable operation of the product are proper transport,
proper storage, installation and assembly, as well as proper operation and
maintenance. When operating electrical equipment, certain parts of this equipment
automatically carry dangerous voltages. Improper handling can therefore result in
serious injuries or material damage.
•Use only isolated tools.
•Do not connect while circuit is live (hot).
•lace the meter only in dry surroundings.
•Do not mount the meter in an explosive area or expose the meter to dust, mildew
and insects.
•Make sure the used wires are suitable for the maximum current of this meter.
•Make sure the AC wires are connected correctly before activating the
current/voltage to the meter.
•Do not touch the meter connecting clamps directly with your bare hands, with
metal, blank wire or other material as you will have the chance of an electrical
shock.
•Make sure the protection cover is placed after installation.

® 2007
•Installation, maintenance and reparation should only be done by qualified
personnel.
•Never break the seals and open the front cover as this might influence the
functionality of the meter, and will avoid any warranty.
•Do not drop, or allow physical impact to the meter as there are high precision
components inside that may break.
Exclusion of liability
We have checked the contents of this publication and every effort has been made to
ensure that the descriptions are as accurate as possible.
However, deviations from the description cannot be completely ruled out, so that no
liability can be accepted for any errors contained in the information given. The data
in this manual is checked regularly and the necessary corrections are included in
subsequent editions. We are grateful for any improvements that you care to
suggest.
Subject to technical modifications without notice.
Copyri ht
Copyright DMMetering November 2007 All rights Reserved.
It is prohibited to pass on or copy this document or to use or disclose its contents
without our express permission. Any duplication is a violation of the law and subject
to criminal and civil penalties. All rights reserved, particularly in the event of a
patent award or utility model registration.
Re istered trademarks
DMMetering
®
is registered trademark of Inepro Industries Ltd – member of the
Inepro Group. The other names appearing in this manual may be trade names the
use of these names by third parties for their own purposes may infringe the rights
of the owners.
1.2 Foreword
Thank you for purchasing the DMMetering RO1250 SERIES DIN rail three phase
four wire energy meter. The DMMetering RO1250 SERIES energy meter is the
most advanced type electronic kWh meter available at the market. With the
DMMetering product range we have introduced a large scale of energy meters on
the market suitable for 110V AC to 400V AC (50 or 60Hz). Besides the normal
energy meters we also developed our own pre-paid meters with chip card, chip card
re-loaders and a complete C management control system. For more information
on other product please contact our sales department at [e-mail] or
[e-mail].
Although we produce the DMMetering RO1250 SERIES meter according to IEC
62053-21 and our quality inspection is very accurate there might always be a
possibility that your product shows a fault or failure for which we do apologize.
Under normal conditions your product should give you years of benefit and pleasure.
In case there is a problem with the energy meter you should contact your dealer
immediately. All energy meters are sealed with a special seal. Once this seal is
broken there is no possibility to claim for warranty. Therefore NEVER open an
energy meter or break the seal of the energy meter. The warranty time is 5 years,
after production, and only valid for construction faults.

® 2007
1.3 Performance criteria:
Operating humidity ≤ 75%
Storage humidity ≤ 95%
Operating temperature -10°C - +50°C
Storage temperature -30°C - +70°C
International standard IEC 62053-21
Accuracy class 1
rotection against penetration
of dust and water I 51
Insulating encased meter of
protective class Ⅱ
1.4 Specifications:
Meter type RO-1250A (register display)
RO-1250D (LCD display)
Nominal voltage (Un) 230/400V AC (3~)
Operational voltage 161/279 – 300/520V AC (3~)
Insulation capabilities:
- AC voltage withstand 2KV for 1 minute
- Impulse voltage withstand 6KV – 1.2µS waveform
Basic current (Ib)
CT version 1A
Direct version 10A
Maximum rated current (Imax)
CT version 5A
Direct version 100A
Operational current range 0.4% Ib- Imax
Over current withstand 30Imax for 0.01s
Operational frequency range 50Hz ±10%
Internal power consumption ≤2W / 10VA per phase
Test output flash rate ( ULSE LED)
CT version 1600imp/kWh
Direct version 400imp/kWh
Test pulse output rate (pins 8 & 9)
CT version 1600imp/kWh
Direct version 400imp/kWh
L1, L2, L3 LED indicators Meter is connected to power
Consumption indicator (Red LED) Flashing at load running
1.5 Basic errors:
With balanced loads
0.05Ib Cosφ = 1 ±1.5%
0.1Ib Cosφ = 0.5L ±1.5%
Cosφ = 0.8C ±1.5%
0.1Ib - Imax Cosφ = 1 ±1.0%
0.2Ib - Imax Cosφ = 0.5L ±1.0%
Cosφ = 0.8C ±1.0%
With sin le phase load

® 2007
0.1Ib - Imax Cosφ = 1 ±2.0%
0.2Ib - Imax Cosφ = 0.5L ±2.0%
1.6 Description
A Front panel
B Cover
C Base
D Security hasp
Material
Front panel C inflammable retarding
Cover ABS inflammable retarding
Base ABS inflammable retarding
1.7 Dimensions
Height 130 mm
Width 126 mm
Depth 65 mm
Weight 0.7 Kg (net)
1.8 Installation
A
B
C
D

® 2007
- We recommend that the connecting wire which is used to connect the meter to
the outside circuit should be sized according to local codes and regulations for
the ampacity of the circuit breaker or over current device used in the circuit.
- An external switch or a circuit-breaker should be installed on the inlet wire,
which will be used as a disconnection device for the meter. And there it is
recommended that the switch or circuit-breaker is near the meter so that it is
more convenience for the operator. The switch or circuit-breaker should comply
with the specifications of the buildings electrical design and all local regulations.
- This meter can be installed indoor directly, or in a meter box which is waterproof
outdoor, subject to local codes and regulations.
- To prevent tampering, secure the meter with a padlock or a similar device.
- The meter has to be installed against a wall which is fire resistant.
- The meter has to be installed in a good ventilated and dry place.
- The meter has to be installed in a protection box when placed in dangerous or
dusty environment.
- The meter can be installed and used after being tested and sealed with a letter
press printing.
- The meter can be installed on a 35mm DIN rail or direct on a meter board with
screws.
- The meter should be installed in an available height so that it is easy to read.
- When the meter is installed in an area with frequent surges due to e.q.
thunderstorms, welding machines, inverters etc, protect the meter with Surge
rotection Devices
- After finishing installation, the meter must be sealed to prevent tampering.
- Connection of the wires should be done in accordance with the underneath
connection diagram.
A. Direct series
CAUTION
•Turn off and lock out all power supplying the energy meter and the
equipment to which it is installed before working on it.
•Always use a properly rated voltage sensing device to confirm that power is
off.
WARNING
•Installation should be performed by qualified personnel familiar with
applicable codes and regulations.
•Use isolated tools to install the meter.
•Fuse or thermal cut-off or single-pole circuit breaker can’t be fitted on the
supply line and not the neutral line.

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1/2 Ia IN/OUT
3/4 Ib IN/OUT
5/6 Ic IN/OUT
7 Neutral
8 and 9 Test pulse output contact
B. CT series
1/2 Ia IN/OUT
3/4 Ib IN/OUT
5/6 Ic IN/OUT
18/17/16 hase A/B/C
15 Neutral
8 and 9 Test pulse output contact
1.9 Operatin
Consumption indication
On the RO-1250 SERIES’S front panel, there are four LED, in which three LED are for
three phase voltage and another one for impulse.
Readin the meter
The RO-1250A series energy meter is equipped with a 5+1 register. Five integers are
marked with black color and one decimal is marked with red. The RO-1250D series
energy meter is equipped with 5+2 LCD display which is used as recording
consumption and can’t be reset to zero. The reading accuracy is 1/100 kWh.
Pulse output
RO-1250 series DIN rail energy meter is equipped with a pulse output which is fully
separated from the inside circuit. That generates pulses in proportion to the measured
energy. They are test pulse output (pins 8 & 9). Usually, the test pulse output is used
as testing accuracy or reading purpose in close quarters.
The test pulse output is a polarity dependant, passive transistor output requiring an
external voltage source for correct operation. For this external voltage source, the

® 2007
voltage (Ui) should be 5-27V DC, and the maximum input current (Iimax) should be
27mA DC. To connect the impulse output, connect 5-27V DC to connector 9 (anode),
and the signal wire (S) to connector 8 (cathode).
1.10 Troubleshootin
CAUTION
•During reparation and maintenance, do not touch the meters connecting
clamps directly with your bare hands, with metal, blank wire or other
material as you will have the chance of an electricity shock and a possible
chance for health damage.
•Turn off and lock out all power supplying the energy meter and the
equipment to which it is installed before opening the protection cover to
prevent the hazard of an electric shock.
WARNING
•Maintenance or reparation should be performed by qualified personnel
familiar with applicable codes and regulations.
•Use insulated tools to maintain or repair the meter.
•Make sure the protection cover is in place after maintenance or reparation.

® 2007
Continue.
Problem Check Solution
No light for the
ower supply
indicator (L1, L2 &
L3 LED).
Is AC power supply
connected to the
meter ?
Is the L1, L2, L3 and
N connecting
correct ?
Are the terminals 1,
2, 3, 4, 5, 6 and 7
connecting correct ?
Maybe there is a
fault in the inside
circuit.
Check switch or circuit-breaker
and fuse or thermal cut-off.
Re-install terminal screws on the
L1, L2, L3 and N. Make sure all
screws are fixed. Than there
should be a 230V 50Hz AC voltage
between the terminal screws on
the N and L1 or L2 or L3, when
power supply is input.
Reinstall terminal screws on the
1, 2, 3, 4, 5, 6 and 7. Make sure
all screws are fixed. Than there
should be a 230V 50Hz AC voltage
between the terminal screws on
the 7 and 1 or 3 or 5, when power
supply is input.
lease contact your technical
supporter to replace this meter.
No light for the
consumption
indicator ( ULSE
LED).
Is the load
running ?
Is the operating
power too low ?
Maybe there is a
fault in the inside
circuit.
Only when load is running, this
LED will flash.
If the operating power is too low,
the spacing interval of the flashes
will take some more time this is
why it seems like LED is not
burning
lease contact your technical
supporter to replace this meter.

® 2007
1.11 Technical support
For questions about one of our products, please contact:
-DMMetering dealer in your in your region
-Your local DMMetering distributor
-Email: [e-mail]
www.dmmeterin .com
Problem Check Solution
The register can’t
run.
Is there a power
supply inside the
meter ?
Is the operating
power too low ?
Maybe there is a
fault in the inside
circuit.
Check that the power supply
indicator ( L1, L2 & L3 LED ) is
burning.
If the operating power is too low,
the spacing interval of the pulses
will take some more time this is
why it seems like the meter won’t
count
lease contact your technical
supporter to replace this meter.
No test pulse
output.
Is DC power supply
connected to the
meter ?
Is the connecting
correct ?
Maybe there is a
fault in the inside
circuit.
Check the external voltage source
(Ui) is 5-27V DC.
Check correct connecting:
connect 5-27V DC to connector 9
(anode), and the signal wire (S)
to connector 8 (cathode).
lease contact your technical
supporter to replace this meter.
ulse output rate
wrong.
Maybe there is a
fault in the inside
circuit.
lease contact your technical
supporter to replace this meter.
Inepro Industries Ltd.
Room 3208, Central laza
18 Harbour Road, Wan Chai
Hong Kong
Fax: [phone]
www.inepro.com.hk
[email protected].hk