42 World Precision Instruments
APPENDIX B: CONTINUOUS RECORDING VIA USB
(PYTHON) ON A PC
The program on the USB ash drive is a self-executing program to record serial data
through a USB cable to a Window PC computer. This is intended to record continuous
measurements of a single sample. The following les are included on the USB stick:
• CDM v2.12.28 WHQL Certied EVOM™ Manual USB driver for Windows
• Python.exe Python recording program and other support folders for
Windows
• Read_EVOM_HOMECNX.bat Batch le for executing the recording program
• WPI_EVOMCNX_5C.py Python EVOM™ Manual USB digital recording program
• WPI_EVOM_Manual.csv Sample recording le
NOTE: An out of resistance range indication on the EVOM™ Manual screen will show
-----. The Python output will list -99999.9. If you are using a lower range (10K or 50K),
stop the output (X), increase the range and restart. The maximum resistance level that
the EVOM™ Manual can measure is 10,5000 ohms.
Running the External Data Connection Output
Program (PC, Mac, Linux)
Windows 8 or above users:
WPI provides a USB keydrive (also known as a ash drive) with all the software needed
to run the External Data Output program. To use these programs:
1. Connect the EVOM™ Manual to the USB port of the PC. The active remote
connection port for the EVOM™ Manual service port is in the back of the unit as
a USB-B connector [ marked in red].
Fig. 71—Plug the USB-B (red) connector into the port on the back of the EVOM™ Manual.
The plug-and-play service from Microsoft should install the driver automatically,
however if a driver is not found, there is a driver in the folder on the USB drive
called CDM v2.12.28 WHQL Certied, which can be used install the driver.
2. Plug the USB ash drive into a USB slot on your PC. If your PC does not have a
spare USB slot, you will have use the Windows option [B] below.
3. Open a Windows Explorer window and navigate to the USB ash drive folder on