Thermo Scientific ThermoFlex Manual De Instrucciones página 182

Analog Values
*Qualifier Byte
b.7
b.6
Precision of measurement
b.5
b.4
b.3
b.2
Unit of measure index
b.1
b.0
E.g., the integer 986 proceeded by a qualifier
byte of 0x12 is 98.6°F.
Example to set setpoint to 25°C:
If the temperature units are unknown, before changing the setpoint send a command to request setpoint. The
response will include both the precision and units. Precision is fixed at 0.1 and units can be either °C or °F. If the
units are already known skip to step 3.
1. Master sends:
2. Slave responds:
Response indicates:
uses a 2 byte integer
precision and units are 0.1°C
3. Master sends:
4. Slave responds:
See Additional Command Examples in this Appendix.
Set Commands – When a Set Command is received and the value is within the allowable limits, the new value
will take affect immediately and the new value will be returned as part of the response to the command. If the
value is outside of the allowable limits, the value will be rejected and the old value will be returned as part of the
response to the command.
Error Response F0 - The "Bad Data" and "Bad Checksum" error responses will not be used. Reject out of
range values and return old settings. Do not reply to message frames with bad checksums. This behavior is
compatible with existing implementations of the protocol.
Thermo Scientific Thermo Scientific
CA 00 01 70 00 8E
CA 00 01 70 03 11 00 C8 B2 (0.1°C x 200)
CA 00 01 F0 02 00 FA 12
CA 00 01 F0 03 11 00 FA 00 (0.1°C x 250)
Unit of Measure
Index Unit
0 NONE
1 Temperature in °C
2 Temperature in °F
3
Flow liters per minute
4 Flow in gallons per minute
5 Time in seconds
6 Pressure in PSI
7 Pressure in bars
8 Resistivity in MΩ-cm
9 %
10 Volts 11 Pressure in K Pascals
μs/cm
12 Conductivity in
(REQ SETPOINT1)
(nn=03)
(d1=11)
(Set Setpoint 1 to 25.0°C)
Appendix C
ThermoFlex C-3