Measurement Computing USB-5203 - Manual (Page 9)

USB-5203 User's Guide Installing the USB-5203
9
Configuring the hardware
All hardware configuration options on the USB-5203 are software-selectable. The configurable options
dynamically update according to the selected sensor category. All hardware configuration options on the USB-
5203 are software-selectable. Settings are stored on an isolated microcontroller in EEPROM – which is non-
volatile memory on the USB-5203 – and are loaded on power-up.
Default configuration
The factory default sensor type configuration is Disabled. The disabled mode disconnects the analog inputs
from the terminal blocks and internally grounds all of the A/D inputs. This mode also disables each of the
current excitation sources.
Warm up
Allow the USB-5203 to warm up for 30 minutes before taking measurements. This warm up time minimizes
thermal drift and achieves the specified rated accuracy of measurements. For RTD or thermistor measurements,
this warm-up time is also required to stabilize the internal current reference.
Configuring data logging options
The following data logging options are programmable with software.
 select the input channels to log
 set the data format
 set the start mode
 set up alarm conditions
 copy and convert saved binary files
 delete data files
All data logging options are stored on the USB-5203 in non-volatile memory in EEPROM, and are loaded on
power up.
Calibrating the hardware
Factory calibration
The Measurement Computing Manufacturing Test department performs the initial factory calibration. Return
the device to Measurement Computing Corporation when calibration is required. The recommended calibration
interval is one year.
Field-calibration
The USB-5203 supports field-calibration with InstaCal. Calibrate the device whenever the ambient temperature
changes by more than ±10 °C from the last self-calibration.
Allow the USB-5203 to operate for at least 30 minutes before calibrating.