Wavelength Electronics LFI-3751, User Manual

Page: 90 / 132

•
Four or six parameters must be set depending on the type of sensor you’re
using: [A1], [A2], [B1], [B2], [C1], and [C2] . [B2] and [C2] are used
for thermistors and RTDs only.
•
For example, to confi gure a thermistor, three (Temperature, Resistance)
data pairs are entered to establish how the thermistor resistance changes
with temperature. Six
Command Packets are sent to confi gure these
values. The following packets confi gure the instrument for a TCS-610
10 k
Ω
thermistor operating around 25°C. The three confi guration data pairs
are (10°C, 19.9 k
Ω
), (25°C, 10 k
Ω
), and (40°C, 5.326 k
Ω
).
Write
!010.00024
(Sets [A1] )
!019.90027
(Sets [A2] )
!025.00020
(Sets [B1] )
!010.00021
(Sets [B2] )
!040.00025
(Sets [C1] )
!005.32620
(Sets [C2] )
•
The table on the next page details the Command Codes and expected
data for all the sensors supported by the LFI-3751.
•
To read the current sensor confi guration, the Command Type changes
from a WRITE (2) to a READ (1):
Read
!000.00026
(Reads [A1] )
!000.00025
(Reads [A2] )
!000.00024
(Reads [B1] )
!000.00023
(Reads [B2] )
!000.00022
(Reads [C1] )
!000.00021
(Reads [C2] )
Chapter 4 - Remote Interface Reference
Confi guring the Sensor
90
Confi guring the Sensor
1. Characterizing Temperature Response
For complete detail about sensor confi guration, see Chapter 2.
RS-232
Commands Discussed:
[A1]
[A2]
[B1]
[B2]
[C1]
[C2]