Measurement Computing DAQFlex - Manual (Page 36)

DAQFlex Message-based Firmware Specification Hardware Reference – USB-2408 Series
36
USB-2408 Series
The USB-2408 Series includes the following devices:
 USB-2408
 USB-2408-2AO
Use the components below to set or get device properties.
Refer to the DAQFlex Software User's Guide for a description of each component and property.
Component Supported
Property/Command Set/Get Supported Values/Notes
AI
ADCAL/START Set
ADCAL/STATUS Get RUNNING, IDLE
RES Get
A/D resolution
S24 (24-bit signed integer)
AI{ch}
CHMODE Set/Get
SE, DIFF, TC/OTD, TC/NOOTD
SE is always returned for channels 8 to
15.
CJC Get DEGC, DEGF, KELVIN
DATARATE Set/Get
3750, 2000, 1000, 500, 100, 60, 50, 25,
10, 5, 2.5 (S/s)
OFFSET Get 4-byte floating point numeric
RANGE Set/Get
BIP10V, BIP5V, BIP2.5V, BIP1.25V,
BIP625.0E-3V, BIP312.5E-3V,
BIP156.25E-3V, BIP78.125E-3V
SENSOR Set/Get
TC/B, TC/E, TC/J, TC/K, TC/N, TC/R,
TC/S, TC/T
SLOPE Get 4-byte floating point numeric
VALUE Get Unsigned integer numeric
AICAL
LOCK Set
MODE Set/Get ENABLE, DISABLE
RANGE Set/Get
BIP10V, BIP5V, BIP2.5V, BIP1.25V,
BIP625.0E-3V, BIP312.5E-3V,
BIP156.25E-3V, BIP78.125E-3V
REF Set/Get
+78.125E-3V, –78.125E-3V,
+156.25E-3V, –156.25E-3V,
+312.5E-3V, –312.5E-3,
+625.0E-3V, –625.0E-3V,
+1.25V, –1.25V, +2.5V, –2.5V,
+5.0V, –5.0V, +10.0V, –10.0V
REFVAL/HEX Get
The measured calibration reference
voltage (hex bytes) stored in EEPROM
memory.
RES Get
A/D resolution
S24 (24-bit signed value)
UNLOCK Set
AICAL{ch}
OFFSET/HEX Set/Get
Double precision floating point numeric
(hex bytes); The channel is ignored.
SLOPE/HEX Set/Get
Double precision floating point numeric
(hex bytes). The channel is ignored.
TCCAL Set/Get ENABLE, DISABLE
VALUE Get
The value in counts of the AI channel
being calibrated.