ECOTEST BDBG-09, Руководство по эксплуатации, Страница: 29 / 46

Operating manual ВІСТ.418266.006-03 НЕ
29
“DER query”
frame format – the data display system to the detecting unit
D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 1 0 1 0 1 Byte 55h
– start-of-frame character
Byte AAh
1 0 1 0 1 0 1 0
0 0 0 0 А3 А2 А1 А0
D7...D4 – “D E R query” frame code
D3...D0 – detecting unit address *
* -
0Fh address – broadcast address. All detecting units respond to the query with this address.
“Current DER”
frame format – the detecting unit to the data display system
D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 1 0 1 0 1 Byte 55h - start-of-frame character
Byte AAh
1 0 1 0 1 0 1 0
0 0 0 1 А3 А2 А1 А0 D7...D4 -
“Current D E R” frame code
D3...D0 - detecting unit address
DER0 (low byte)
DER,
fixed point number,
Least significant bit (LSB) = 0.01 µSv/h
DER1
DER2
DER3 (high byte)
Byte Statistical error of measurement
D7 0 0 0 0 D2 D1 D0
D0,D1 – self-testing results of the
detecting unit
D0=1 – failure of the high sensitivity
detector
D1=1 – failure of the low sensitivity
detector
Reliable measurement result character
D2=0 – result is reliable
D2=1 – result is not reliable *
D7=0 – LSB DER = 0,01 µSv/h
D7=1 – LSB DER = 0,1 µSv/h
control arithmetical checksum with a carry
* - measurement result is accepted as not reliable if the statistical error of measurement exceeds maximum permissible
error of measurement