Bruker BioSpin NMR BVT3200, Technical Manual

Page: 30 / 56

30 (55) BRUKER BIOSPIN Technical Manual Version 002
AF - Air Flow 4.8.1
Write
NB : At start the microcontroller reads the jumpers (JP7-10) and the gas flow is
set as defined by the jumpers settings.
JP7 : V1 (A) JUMPER NOT SET
➔
VALVE OPEN
JP8 : V2 (B) JUMPER SET
➔
VALVE CLOSED
JP9 : V3 (C)
JP10 : V4 (D)
These jumpers are located between the valve block and the temperature
controller.
WARNING : Space characters are not allowed.
Read
Syntax :
EOT 0 0 0 0 STX
AF
> ABCD ETX BCC
Response : ACK
Description : This command allows to control the gas flow delivery.
Rules :
The unit has four gas flow valves. ABCD represent the value of
the delivery. Each character represent one valve state (a part of
the maximum delivery) and can only be «0» or «1». The total
delivery is the amount of the four individual deliveries. A
NACK
is send if one of these characters is not «0» or «1».
Table 1.2." Default gas flow versus jumper settings" on
page 10
shows the different gas flow deliveries.
Example : If ABCD is set to «1100» (12 decimal), The delivery corre-
sponds to 1600 litres per hour.
Syntax : EOT 0 0 0 0 AF ENQ
Response : STX AF > Value ETX BCC
Description : This command allows to read the actual gas delivery.
Rules :
Value is a 4 characters string.
Table 1.2." Default gas flow versus jumper settings" on
page 10
shows the different gas flow deliveries.