Cole Parmer RS-200 Series, Инструкция по эксплуатации

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APPENDIX ‘A’ STEM Protocol Commands
Stem address and serial port
The unit address of the Omni-station is 50. It cannot be changed.
The serial port operates at 9600 baud, eight data bits, no parity, one stop bit (“9600, N, 8, 1”).
There is no hardware or software data handshake. DCD, DSR and CTS are asserted, DTR and
RTS are not connected.
The serial port is wired as DCE (the Omni-station receives on pin 3 and transmits on pin 2).
Temperature control
TT - target temperature:
• Decimal values permitted, but are truncated to integer.
• Out-of-range values are rejected as bad commands.
• If a temperature probe is fitted, the system will attempt to make the probe reach the target
temperature.
•
If no temperature probe is fitted but the block has an internal temperature sensor, the
system will attempt to make the block reach the target temperature.
• If neither probe nor internal thermometer are present, the value in the target temperature
command will be interpreted as a duty cycle command.
• If a ramp-rate is set, a change in target temperature during heating/cooling restarts the
ramp from the current temperature.
Example >50 TT55 #0000[cr] will set the temperature to 55°C.
TE - enable thermal control:
• 1 = enable, 0 = disable.
Example >50 TE1 #0000[cr] will set the temperature control to active.
TR
- temperature ramp rate:
• Decimal values permitted, but are truncated to integer.
• Out-of-range values are rejected as bad commands.
• Units are degrees C per minute.
• A value of 0 turns off ramp-rate control (i.e. crash heat/cool).
• Ramp is applied from the current temperature, not the present target temperature (e.g. if
a target of 100 had been set, but it had not yet been achieved and was at 80, and a new
target of 120 is commanded, the temperature will be set to ramp from 80 to 120 and not
from 100 to 120).
• A change in ramp rate during heating/cooling restarts the ramp from the current
temperature
Example >50 TR3 #0000[cr] will set the temperature ramp rate to 3°C per min.
Stirring control
SS - stir speed:
• Decimal values permitted, but are truncated to integer.
• Out-of-range values are rejected as bad commands.
Example >50 SS500 #0000[cr] will set the stir speed to 500RPM.
SE
- stir enable:
• 1 = enable, 0 = disable
Example >50 SE1 #0000[cr] will set the stir control to active.