SA9607P

http://www.sames.co.za.

7/12

PARAMETER DESCRIPTION

Refer to the EEPROM memory allocation map as well as the

Signal flow diagram figure 6, for a description of the registers

used in this section.

EEPROM Memory Allocation

The following table shows the EEPROM memory allocation

as well as the corresponding name. The uneven byte always

contains a XORed byte of the previous even byte. This is the

checksum byte used by the SA9607P to ensure data integrity.

Channel Balance (KC)

Kc defines the dividing factor, which is applied to the incoming

pulse rate. This value is typically 511. This factor is used for

calibration meter and gain balancing of the 2 current channels.

The value for Kc is usually between 400 and 640.

Kc is made up of 2 bytes, D12 and D14 or D16 or D18 which

forms a 10 bit value.

KEY: (- = DON'T CARE); (V = VALUE/PARAMETER); (0,1 = LOGICAL VALUE); (X = BIT-XOR)

Rated Condition (KR)

Kr is used to program the rated condition of the meter. This

feature is required for a correct counter increment of meters

designed for different rated conditions using the same

integrated circuit. Rated conditions from less than 10A to

several 100A are possible.

The channel balance values should be used to compensate

for rounding errors in Kr. Kr is calculated as follows:

Kr =(1252 x 1000 x 3600)/(Rated volt x Rated current x 6400)-1

Kr is made up of 1 byte (D20)

Description

Contents

Bit [7:0]

Name

Channel 1 Balance LSB

12

Kc1

vvvvvvvv

D12

13

XOR of ADDR 12

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Channel 1 Balance MSB

14

Kc1

------vv

D14

15

XOR of ADDR 14

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Channel 2 Balance LSB

16

Kc2

vvvvvvvv

D16

17

XOR of ADDR 16

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Channel 2 Balance MSB

18

Kc2

------vv

D18

19

XOR of ADDR 18

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Rated Condition

20

Kr

vvvvvvvv

D20

21

XOR of ADDR 22

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Led Pulse-rate

22

Cled

------vv

D22

23

XOR of ADDR 22

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Counter Pulse-width

24

Cpw

0v------

D24

Counter Resolution

24

Cres

------vv

25

XOR of ADDR 24

1xxxxxxx

Earth leak Compensation

26

Ne

------vv

D26

Channel Select Mode

26

Cs

----vv--

27

XOR of ADDR 24

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