SENTRON A120-001, Technical Manual

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5.2.3 Retrieving the pH signal
After a single or multipoint calibration the AD Converter module the pH value can be read out.
Retrieve pH value

Send the command bytes: 999!<CR>

Wait for the module to return the pH value, receive bytes: ABCDEFGHIJK
Data ABCDEFGHIJK marks the byte position. Values in bytes are needed for decoding.
Byte position A B C D E F G H I J K
Byte value
byte byte byte 000 000 000 000 000 000 013 010
Decode received sequence if e.g.:
Byte position A B C D E F G H I J K
Received bytes
001 023 027 000 00 000 000 000 000 013 010
Protocol:
A =
001
B = 023
C = 027
DEFGHIJK = n/a
A*4096 + B *64 + C = 1*4096 + 23*64 + 27 = 5595
pH value = 5.595
5.2.4 Retrieving the temperature signal
Retrieve temperature value

Send the command bytes: 777!<CR>

Wait for the module to return the pH value, receive bytes: ABCDEFG
Data ABCDEFG marks the byte position. Values in bytes are needed for decoding.
Byte position A B C D E F G
Byte value
byte byte 000 000 255 013 010
Decode received sequence if e.g.:
Byte position A B C D E F G
Received bytes
012 023 000 000 255 013 010
Protocol:
A =
012
B = 023
CDEFG = n/a
A*64 + B = 12*64 + 23 = 791
Temperature value = 79.1 °F