Sensoray 417 - Manual (Page 28)

27 Sensoray Model 417
Chapter 4 Programming
Sensor Table
Notes:
Scale Factors: The Scale Factor for each sensor type is shown above in the Resolution column,
above. Example: when a channel is configured for the +500mV measurement range, data is scaled
to 20
µ V per bit. In this case, convert the integer data returned by the Read Channel command to
Volts by multiplying times 0.00002.
Current Loops: Channels configured for current loops return data values that are scaled to 0.01%
per bit (4mA=0%, 20mA=100%). Correspondingly, decimal value 0 will be returned for a 4mA
current, and decimal 10000 (100% / 0.01% per bit) will be returned for a 20mA current.
“Disabled” type: Declaring a channel’s sensor type as Disabled removes the channel from the
scan loop. Data values returned from such channels are meaningless and should be ignored. In the
case of the Read Channel Group command, data is always returned for eight channels, regardless
of whether any of the channels are disabled.
Type 0: Sensor Definition Code 00H—the default sensor type after a reset—is provided for
back-compatibility with earlier Sensoray products. Use of this type is not recommended for new
designs, as higher resolution is available from type 15H. If you are utilizing the +5V measurement
range, specify type 15H for the best performance.
Table 11: Sensor Definition Codes and Scale Factors
Sensor Type Code Resolution
Voltage +100mV 17H 5µV
+500mV 16H 20µV
+5V 15H 200µV
+5V 00H 500µV
Thermocouple B 24H 0.10°C
C 23H
E 01H
J 1BH
K 1CH
N 22H
T 1DH
S 1EH
R 1FH
Current Loop 4-20mA 11H 0.01%
Disabled 13H N/A