INTRODUCTION

This Application Note describes the functionality of the

SA9607M and the SA9607P metering integrated circuits using

the PM9607AP evaluation module. The SA9607 family is a low

cost solution specifically designed to meet the needs of

markets that require both live and neutral energy

measurement, in order to detect possible meter tampering.

Using the SA9607 family the meter manufacturer is able to

build a meter that measures the energy consumption, even

during a tamper condition, and records it to a mechanical

counter.

This application note will focus on the practical use of the

SA9607 family. More detailed information specific to the

SA9607M or SA9607P can be found in the applicable

datasheet.

The SA9607 family is characterized by its ability to measure

live and neutral power consumption simultaneously. A

correctly installed meter should measure equal amounts of

power consumption in the live and neutral phases. During

meter tampering the two measurements are no longer equal.

The SA9607 will use the larger of the two currents for the

energy measurement. Differences of more than 12% between

the live and neutral power measurements are indicated on the

SA9607’s ELT output which can drive a LED directly.

The SA9607 are designed to drive mechanical counters

directly. The module is fitted with an impulse type counter that

increments with a single 71ms pulse. The SA9607 can also

drive low cost mechanical counters (stepper motors) that use

two consecutive pulses with opposing voltages to advance the

counter one position. The SA9607 outputs these two opposing

pulses in close succession, minimizing the chance of the

stepper motor being in the wrong phase after a power failure.

Calibration pulses, reverse power, earth loop tamper and

active channel are displayed with four LEDs fitted on the

module.

Using the SA9607M, the rated conditions of the meter as well

as the LED pulse rate and counter resolution can be selected

for a particular meter design. The meter manufacture is thus

able to produce a range of meters utilizing the same counter

and the same metering constant with a single integrated

circuit. Calibration of the meter is done with trim-pots or

resistor ladders. Table 1 gives a short list of all the possible

THE SA9607 SERIES ENERGY METER ICS

THE SA9607M PIN PROGRAMMABLE MONOCHIP

METER

sames

Application Note:

Energy Meter Evaluation Module

PM9607AP

meter configurations possible with the SA9607M using the

PM9607AP module. Note that the values of the current

transformer’s resistor values need to change to make some of

the rated conditions possible. This will be covered in the

Analog Section.

Table 1: A summary of the pin settings possible with the

SA9607M. Pin status 0 indicates connects to VSS and 1

indicates connection to VDD

THE SA9607P MONOCHIP METER WITH ON CHIP

CALIBRATION

The SA9607P uses an external EEPROM to store calibration

data as well as meter specific settings. A major advantage of

the SA9607P is that no external trim-pots or resistor ladders

are required to calibrate the meter. This greatly enhances the

meter reliability and can improve meter production times if

used in an automatic meter calibration system.

The SA9607P integrated circuit together with an external

EEPROM provides more meter setup features than the

SA9607M. Additional information regarding the meter (serial

numbers, client, and manufacture date) can also be stored in

the unused sections of the EEPROM memory. An IIC bus

based EEPROM is used to store configuration and meter

setup data for the SA9607P. The SA9607P will load this data

from the EEPROM during power up. During normal meter

operation it reloads periodically the data from the EEPROM.

The SA9607P never writes to the EEPROM. For more specific

configuration information please refer to the SA9607P

datasheet.

1/16

Setting

20A / 230V

40A / 230V

60A / 230V

1 pulse / kWh

10 pulse / kWh

100 pulse / kWh

Pin Status

RATED = 0

RATED = Open

RATED = 1

MP1=0,MP0=0

MP1=0,MP0=1

MP1=1,MP0=0

SPEC-0045 (REV. 1)

19-06-00