LAMBDA REDOX measurement unit
Operation MANUAL
www.lambda-instruments.com
8
6 APPENDIX
6.1 RS communication protocol for LAMBDA REDOX Potential
measurement unit
6.1.1 Communication settings:
Speed:
2400 Baud
Data format:
8 bit, odd parity, 1 stop bit
Transmit-Receive switching:
DTR (usually automatic switching)
Transmit-Receive interval:
10 ms
6.1.2 Data format for transmission from the computer (master):
# ss mm
G
qs c
send data
# ss mm
M
qs c
send data
where:
ss
is the address of the slave receiver
mm
is the address of the transmitter (master)
M
or
G
command to send data
qs
control sum
c
carriage return CR (ASCII 0D)
6.1.3 Data format for transmission to the computer (master):
< mm ss a ddd qs c
where:
a
r
– for positive value
l
– for negative value
ddd
data (3 ASCII number 0.......9 - transmission from high to low)
qs
control sum in hexadecimal format (2 ASCII symbols 0.......9 A B C D E F)
6.2 How to set the REDOX measurement unit address?
To look up/modify the instrument address, disconnect the 8-pole cable from the REDOX
measurement unit.
Press the
ADRS
button continuously and at the same time connect the 8-pole cable to
REDOX measurement unit again. The message
“A”
and two numbers will appear on the
display. This number from 00 to 99 is the current address of the powder dosing instrument.
To change the address press the buttons
Λ Λ Λ
under the display until the desired number is
obtained.
To confirm and save the address, press the
OK
button.