The PVM Utility is necessary for this procedure. To download the PVM Utility, refer to Download the
PVM utility on page 27.
This is the general procedure to update firmware for the meter and sensor. To update the sensor
firmware, the sensor must be connected to the meter.
1. Double-click the PVM Utility desktop icon.
2. Push the power button on the meter. When the meter self-test is complete, push OK.
3. In the Main Menu, select Setup, then push OK.
4. Select USB>CDC, then push OK.
5. Connect the USB cable to the portable meter and the PC.
6. In the PVM Utility window, select Connect.
7. In the drop-down menu, select the PVM (COM X) port, where COM X is the virtual port number
assigned to the PVM by Windows. Push OK.
8. In the left-side panel, select Firmware Update, then select the Meter or Sensor tab.
9. Select the correct firmware version, then click Start.
The firmware download starts. A "Firmware update successful" message shows when the
download is complete. For meter updates, the instrument display turns off until the instrument
completes the update. Then, the instrument automatically resets and powers up again after a few
minutes. Do not try to make the instrument power on or off before the update process is
complete.
10. In the Main Menu, select Diagnostics > About. Make sure that the firmware versions for both the
Handheld Boot and the Handheld Application are correct.
Clean the sensor
W A R N I N G
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
Clean the sensor when unexpected increases or decreases in flow or level trends occur and after
use in sandy or muddy waterways.
For heavy contamination, soak the sensor in clear water for a few minutes to help make the
contamination easy to remove.
Disconnect the sensor from the meter before it is cleaned. Use only solutions listed as acceptable in
Table 4 to clean the sensor. For sensors with a pressure cell (i.e., velocity plus depth sensors), make
sure the holes for the pressure cell chambers are washed out and clear of contamination. Rinse the
sensor with clean water before re-attaching the sensor to the assembly.
Table 4 Acceptable and unacceptable cleaning solutions
Acceptable Do not use
Dish detergent and water Concentrated bleach
Window cleaner Kerosene
Isopropyl alcohol Gasoline
Aromatic hydrocarbons
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