Garnet SeeLevel II 900-D4S Single Manual page 6

so up to 9,999 can be shown, with the decimal able to be as 9.999,
99.99, 999.9, or 9999 with no decimal. The volume is programmed
using the keypad, and a chart showing inches of level versus
barrels of volume for the tank is required. If the tank has straight
vertical sides so that the volume per inch of depth is constant
throughout the tank, then the volume per inch can be entered
and the display will calculate all of the inch versus volume table.
Even though the gauge has 1/4" resolution, it is only necessary to
program the volume for each whole inch; the display calculates
the volume at the 1/4", 1/2", and 3/4" points. Programming is a
two step process, first the chart of volume for the inches of level is
entered, and then the offset has to be set to account for variations
in tank height and sender mounting position. The display only has
to be programmed for one volume; all three LCDs use the same
calibration.
The lower right LCD shows the current alarm status, based on the
product level and the alarm set points. Alarms 1 to 4 are shown
as "1234" on the LCD; if the alarm output is active, the number
is shown and if the alarm output is inactive, the number is not
shown. So for example, if the "12 4" is shown, it means that
alarms 1, 2, and 4 are active, and 3 is not.
If the BATTERY button is pressed, the display will show the
condition of the sender battery and the display batteries. The
battery conditions can be "Good", "FAIr", or "Poor". If the
batteries are FAIR, they should be replaced soon, and if they are
POOR then the gauge may not function properly and the batteries
must be replaced immediately.
The LCDs take on different roles during programming, but this is
covered in the next chapter.
Display Keypad: The keypad consists of the 16 buttons on the
front of the display. The keypad is used for the following functions:
• To show battery condition as described above.
• To turn on the LCD backlight.
• To turn the gauge display on or off.
• To select °F or °C for the temperature display.
• To program the 4-20 mA outputs.
• To set the alarm points.
• To program the gauge calibration.
• To enter the security codes which control access to the various
gauge functions.
Page 6 900D4S Manual