2. Connect RS232 cable to D9 connector on back of instrument and other end to
PC.
3. Open a serial emulator such as the 2B Data Display Software, Teraterm, or
Hyperterminal on available com port running at 9600 Bits per second, 8 data
bits, No parity, 1 stop bit, hardware flow control.
4.
Locate “sw2” on circuit board. It is a small push button switch located above
the pressure sensor.
5. Press and hold the button labeled "sw2" on the PCB.
6. Power on the instrument.
7. Look on the serial emulator window for data output starting with "ADuC834".
(If data not seen on the terminal, repeat steps 5-7 until you see the data output.)
8. The instrument is now ready to have a new program downloaded to it from the
PC through the RS232 cable.
9. Close the terminal screen which will release the COM port.
10. Open the WSD (Windows Serial Downloader)
11. Press the "Reset" button on the WSD screen.
12. When the board is Reset properly the WSD screen will output this:
Configuration: COM1, 9600 baud, RESETTING PART: OK
13. Press the "Download" button on the WSD screen.
14. Choose the .hex file to download (For example: NO405VER23K.hex)
15. You will see a bar on the WSD screen showing the progress of the download.
When the bar has completed the download is successful.
16. Cycle Power to be sure the new version starts correctly.
V. Replace top cover and re-enter menu parameters
1. Replace top cover in the reverse process as removal.
2. Re-enter all parameters recorded in step 1 of section II.
