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Chapter 1    Picture of DDZY22 Single Phase Smart Energy Meter

Chapter 2    Open Package Inspection

 After procurement of this meter, please perform open package inspection as per the following steps:

1.      Check whether the packing box is intact and without damage.

2.      Carefully open the packing box, take out the smart energy meter, check the product model and specification, and inspect whether the outer casing is intact.

3.      Put the smart energy meter steadily on top of a table, check whether all accessories are complete.

The detailed packing list of this meter is as follows:

Ser. No.

Name of goods

Model & specification





Smart energy meter






Instruction manual






Packing list






Certificate of inspection











If there is any doubt during the above inspection, please immediately contact supplier or delivery man. 

Chapter 3    Technical Parameter of DDZY22 Single Phase Smart Energy Meter

3.1         Brief Introduction of Products

DDZY22 model single phase smart energy meter is designed and manufactured by using nowadays most advanced energy meter ASIC (application specific integrated circuit), microprocessor, non-volatile memory that permanently saves information, wide temperature liquid crystal display etc. and SMT technology. It is of high accuracy, wide load range, high sensitivity, low power consumption, it is used for metering AC active energy in single phase power grid with rated frequency of 50/60Hz. This meter integrates multiple functions, realized TOU metering of forward, reverse active energy and remote transmission of real time voltage, live wire current, null wire current, active power, power factor etc. This meter also has IR, RS 485 interface which facilitate the power utilities to achieve computerized network management. And multiple kinds of anti-interference measures by means of software and hardware are adopted to ensure the reliable operation of energy meter thus accommodate to the demand of power utilities for effective, timely, modernized and scientific management of customers.

The operation information of energy meter can be obtained via micro-power wireless, palm top computer, RS485 interface. The power utilities can choose on their own the communication transmission mode according to the specific situation of their own region. The communication protocol of the energy meter complies with the requirements of DL/T645-2007 and its archival filing documents.

Remote management control function: by making use of wireless ad hoc network, RS485 communication it is possible to constitute remote meter reading, control function, and it is capable to realize remote meter reading, setting up, control and the like management of energy 

 3.2   Technical Parameters:

IEC 62052-11:2003  General requirement for electric energy measurement equipment, test and test conditions – part 11: measurement equipment

IEC 62053-21:2003  Special requirement for electric energy measurement equipment part 21: class 1 and class 2 static active energy meter

3.2.1       Specification and Technical Parameters:       Voltage and Current Parameters:

l  Nominal operating voltage: Un: 220V, operating voltage range (70% ~ 120%) Un

l  Voltage circuit: under reference voltage, reference temperature and reference frequency, the consumption of active power and apparent power of the voltage circuit of energy meter is less than 1.5W, 10VA in the state of non communication; and less than 3W, 12Va in communication state.

l  Current circuit: under basic current, reference temperature and reference frequency, the apparent power consumption of the current circuit of the energy meter is greater than 1VA.

l  Nominal current: 1.5(6)A  5(10)A  5(20)A  5(40)A  10(40)A  10(50)A  10(60)A   20(80)A  20(100)A      Starting current: ≤0.004Ib      No-load condition (creeping): it has logic anti-creeping function      Impulse constant: 12000 imp/kWh、3200 imp/kWh、2400 imp/kWh、1600 imp/kWh、1200 imp/kWh、800 imp/kWh、600 imp/kWh,pulse width 80±20ms   Range of operating temperature:-30℃~65℃,range of extreme temperature:-40℃~70℃,relative humidity ≤85%.     Net weight: <2.0Kg   Automatic meter reading function: freezing at zero hour day 1 of every month.  Adopting built-in hardware clock circuit with temperature compensation function, it has calendar, timing and leap year automatic switching function; the terminal output frequency of internal clock is 1Hz. Under reference temperature (23℃), the clock accuracy is ≤±0.5s/d. In the temperature range of-25℃~ +60℃, the clock accuracy is ≤±0.5s/d; the broadcast time adjustment range which the energy meter can accept is no more than 5min.     Performance parameters of the embedded wireless module in meters

A.    Application parameter

Interconnection characteristics: automatically build up network via wireless links.

Mode of meter reading: support the function of centralized meter reading and single meter thorough reading under the real time condition.

A.    Wireless parameter

Operating frequency range: 470MHz – 510MHz

Maximum emitting power: 17dBm

Data rate: 38.4Kbps

Receiving sensitivity: -108dBm@ 38.4Kbps & BER=0.1%

Operating duty ratio: the lasting time of emitting status <200msec

B.     Network parameter

Network capacity: elastic capacity program without explicit limitation on maximum number of nodes (depending on the capacity of the memory cell used by each node). For example, one typical system can support up to 1016 meters.

Data encryption: DES

Chapter 4   Energy Meter Function

4.1     Metering Function

4.3.1  It has the function of measuring the forward active electric energy and reverse active electric energy, it is capable of saving their data, based on which the combined active can be set up.

4.3.2 It has the function of TOU metering, the active electric energy is accumulated respectively according to the corresponding periods of time, T1 (sharp), T2 (peak), T3 (off-peak) and T4 (shoulder) energy are saved.

4.3.3  It is capable to save the total energy and the energy related with different tariffs for the last 12 months: the parting time for data storage is at 24 hour of month end, or at the integral point of time within day 1 to day 28 of every month.

4.2         Load Switch

4.3.1    Load switch could be of built-in or external mode. When built-in load switch is adopted, the maximum current of the energy meter should not exceed60A.

4.3.2  When the built-in load switch is adopted, there should be arc suppression measures (hardware or software) at the time of switch operation, its outlet loop should have safety measures to prevent against malfunction and to facilitate field testing. Under the condition of turning on and off the above current, the life-span of load switch should not be less than 6000 times. Under the condition that the reference voltage is applied on the voltage circuit of the energy meter, and 1.2Imax passes through the current circuit, conduct the switch on off test for 10 times; after test, the energy meter should be able to operate normally; When 70% ~ 120% of reference voltage is applied on the voltage circuit of the energy meter, the load switch should be able to operate normally.

4.3     Event Logging

4.3.1 Permanently register the occurring time of energy meter clearing event and the electric energy data at the time of clearing.

4.3.2  Register the total number of last 10 programming, time adjustment, the time of last 10 programming and time adjustment, operator code, data identification of programming items.

4.3.3  Register the total number of power-fail, the starting and ending time of last 10 power-fails.

4.3.4  Register the last 10 events of remotely controlled disconnection and the last 10 events of remotely controlled reconnection, log the occurring time of disconnection and reconnection events and the electric energy data etc.

4.3.5  Register the total number of cover opening, and the occurring and ending time of last 10 meter cover opening events.

4.4    Tariff, Period of Time Function

It has two sets of time intervals, tariff period of time table, it can switch automatically at the appointed time; at least 14 periods of time can be programmed at will within 24 hours; each set of tariff supports 4 tariffs which can switch over automatically at the appointed time.

4.5     Freezing Function

It has the function of fixed time freezing, instantaneous freezing, conventional freezing, daily freezing, integral point freezing, and all the frozen contents and the corresponding data identification conform to the requirements of DL/T 645 – 2007 and its archival filing document.

4.6    Alarm Function

When the following fault or alarm items appear, LCD should immediately remain at this code or present alarm prompt, and the back light illuminates continuously:

a)     When the energy meter has fault, the error information code is displayed (denoted by Err-XX):

1)     Err-01 control circuit error;

2)     Err-02 ESAM error;

3)     Err-04 clock battery voltage low;

4)     Err-08 clock fault;
5)     Err-10 authentication error;
6)     Err-16 modifying cipher key error.

4.7        Display Function

a)     LCD back light wake up mode, including push button wake up, infrared wake up (any infrared equipment can wake it up);

b)     In case of power failure, it is possible to wake up the display via push button (back light may not illuminate); if no operation after wake up, LCD should automatically shut off after one cycle of automatic display; 30 seconds after end of keying display operation, the display is automatically shut off.

Chapter 1    Meter Outline Dimension Drawing and Connection Diagram
5.1     Outline Dimension Drawing:

             Connection diagram for           Connection diagram for internal            Connection diagram for the type of 
    external directly connected type              directly connected type               connection via instrument transformer     

Chapter6    Transportation and Storage

6.1         Transportation

For transportation and storage, the energy meter should not be subjected to violent impact, they shall be handled with care, and placed according to the requirement of “upward” and “damp-proof” marked on packing carton. The transportation and storage should be in compliance with the provisions of GB/T 15464-1995 “General Technical Conditions for Packing of Instrument and Meters”.

6.2   Storage

Storage environment-25~70, relative humidity not exceeding 85%, no caustic gas contained in air. For storage of energy meter in warehouse, they should be placed on racks. The height for piling up the energy meters individually packed after carton opening does not exceed 5 pieces, the height for piling up the entire cartons should not exceed 5 cartons.

Chapter7. Equipment Maintenance and Handling of Common Faults

Fault phenomena

Possible reason

Disposition method

No display

No power supply

1.      Check circuits by means of multi-meter to see whether there is voltage (it is recommended to measure on the voltage terminal row of energy meter).

2.      Whether the voltage of energy meter is connected according to the nominal voltage marked on the faceplate of energy meter.

RS485 communication failure while performing meter reading

Incorrect connection

No external power source

1.      If the power pulse lamp on the nameplate blinks, check whether the connection for testing wire is correct.

2.      The pulse output mode of our company’s energy meter is mostly idle-contact output, it is a must to apply external power source (5V-24V) DC, the voltage may not be higher than this value. It might be checked by using multi-meter to see whether the requirement is reached.

Failure of parameter setting up

Hardware is not normal or no corresponding authority

1.      Firstly refer to the above point to seek for reasons.

2.      Whether the authority password is correct, whether the programming push button is pressed down.

If the problems can not be solved through the above method, please contact the customer service department of our company.