Metrohm 822 Titration Curve Simulator - Manual (Page 21)

4 Appendix
822 Titration Curve Simulator, Instructions for Use
13
4.1.4 Testing department – test
A ramp in the voltage range of –2 V to +2 V is run through with curve
"7".
test curve
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0 5000 10000 15000 20000 25000 30000
pulse number
vo
lta
g
e [V
]
Excel diagram from original data
4.2 Meaning of the LEDs
The green LEDs represent the commands (more exactly: the single bits)
from the control device for the dosing device. The red LEDs represent
the reply i.e. the single bits from the dosing device to the control device.
Labeling on the device:
Red LEDs
serial out (SER_OUT)
Green LEDs
serial in (SER_IN)
serial 8-bit serial 25-bit bit-No. serial 25-bit serial 8-bit
e. g.:
685 Dosimat
700 Dosino
e. g.:
805 Dosimat,
800 Dosino
e. g.:
805 Dosimat,
800 Dosino
e. g.:
685 Dosimat,
700 Dosino
Reply from the dosing device 0 ... 24 Commands for the dosing device
Status information from 822 --- Status information from 822
4.2.1 Serial 8-bit
With the 8-bit transmission the single bits 0...7 have the following mean-
ings:
Reply from the dosing device:
SER_OUT - bit 0:
BUSY Status message for active cock
switching
SER_OUT - bit 1: STOP Status message if difference counter
= zero
SER_OUT - bit 2: ESU End switch down: cylinder at minimal
stroke
SER_OUT - bit 3: EXP0 Bit 0 for coding the cylinder volume