View Menu

The View Menu can be accessed from the main menu screen by pressing the right arrow key when “View” is highlighted on the display. This menu allows the user to navigate to and see the files, as well as check on many features of the F-900. Options from the View Menu are: Files, Voltage, Battery, Flash, Time, GPS, and SD card.

View Files

The View>Files Menu allows the user to review the filenames and file size of any files on the F-900. To view collected and saved data, either download files via USB or eject the SD card and insert it in a computer. In the View>Files mode, the top line of the display will show the word “View” on the left and “Files” on the right. Below this, the column on the left contains the filename and the column on the right contains the file size.

The options are:

• use the up or down arrow keys to scroll through the files
• press the left arrow or Stop to exit to the View Menu

Note: A file with a negative number for the file size is corrupt. This file should be deleted and re-created.

View Voltage

The View>Voltage Menu shows the current voltage of the instrument. Press the right arrow when Voltage is highlighted to check the unit’s voltage. If any of these numbers are rapidly changing after the instrument has warmed up, please contact technical support at [email protected]. Press the left arrow or Stop to exit back to the View Menu.

Voltage is set for each individual unit before leaving the Felix Instruments factory and is board specific. For default voltage values, please see the Production Test Check Sheet at the end of the Instruction Manual for factory voltage settings. V_System is the voltage of the control board. The voltage for V_Charger should increase when you connect the USB charger. V_3volt is the digital voltage from the CPU and the V_Analog is the converted analog voltage.

View Battery

The View>Battery Menu displays indicates on the top line if the unit’s Charging is On or Off, or if the unit is connected via USB cable to a computer. The QBAT value shows the battery level in hexadecimal follow immediately by the battery level in percent. VBAT shows the voltage of the battery and TBAT indicates if the temperature of the battery is ok. The Charge shows the output status of the battery charger. Press the left arrow or Stop to exit to the View Menu.

When the instrument is connected to the charger, the top line will indicated Charge On. Charge Off indicates that the unit is not charging. USB Host in the upper left corner indicates that the unit is connected to the computer or that the power supplied by the charger is not full charging voltage (unplug any other devices using the same charger).

The QBAT hexadecimal number should be changing and the battery percent increasing. Also, the voltage will begin to increase slowly. The Charge will read “off” when no charger is plugged in and “Complete” when finished charging. The Board refers to the hardware version of the unit. Features described in this manual are associated with all versions of hardware. When discrepancies occur, they are listed, along with the version that they are associated with.

Other View Menu Options

The View>Flash option is only accessible by Felix Instruments technicians.

The View>Time screen displays the current time on the instrument. Press the left arrow or Stop to exit back to the View Menu. The View>SD card screen indicates if an SD card is present in the unit, as well as other information about the SD card. If no SD card is in the instrument, or if the SD card is not fully inserted, “no SD card” will appear on the display.

GPS System Features

The F-900 has a built-in GPS system which can relay the longitude, latitude and altitude of the instrument when performing measurements. The View>GPS screen displays the mode of the GPS sensor (SEN= $GPGGA), as well as the values for latitude, longitude, altitude and indicates the number of satellites currently connected to. Press the up/down arrow to display the latitude, longitude and altitude information only.

The GPS uses GMT or Greenwich Mean Time for a standardized time. The GMT is displayed as the time (TIM) on the GPS menu and is synchronized with minute and second alignment. Often, when the instrument is turned on indoors, the latitude, longitude and altitude will be blank. This occurs when no satellite signal can be obtained by the instrument. Powering up the F-900 outdoors will correct this problem and allow latitude, longitude and altitude readings to be taken.