10
LEVEL ALARM STATUS
There are three level setpoints per tank (HI - MID - LO) which are programmed by the
user. When the level in the tank reaches a setpoint line 1 or 4 on the screen is relpaced by the
General Alarm Status Line . After all alarms have been acknowledged the display returns to its
normal appearance. However, the level status indicator is now activated for the alarms
acknowledged. Level alarm status indication appears on both the Single and the Multi-tank
screen in various forms. The Multi-tank screen displays an astericks ( *) for high level, the
letter "M" for mid level and the letter "L" for low level. These characters appear immediately
following the channel number. If there is no indication in the level status column for a
particular tank then the actual product level in the tank is between the lo level and the mid
level setpoint.
The letter "E" appearing in the level status column indicates that the product level is
at or below the level sensor in the tank.
The Single tank screen displays the tank level status on the 2nd line after the channel
number and preceding the word "LEVEL". When the tank product level is at or above the Hi-
level setpoint the characters "HI" appear. Similarly when the product level is at or above the
Mid-level setpoint and below the Hi-level setpoint the characters "Md" appear. The characters
"OK" are displayed when the product level is betweem the lo-level and the mid-level setpoints.
"LO" appears when the level is at or below the lo-level setpoint. When the product level is at
or below the tank sensor the characters "EMPTY" appear on the screen.
(CAUTION: Even though the screen reads "empty" product may remain in the
tank below the level sensor)
ANALOG TO DIGITAL COUNTS
The K1600 uses a 12-Bit Analog to Digital converter which normally converts a 4-
20 Ma current input signal to 0-4096 digital counts. The K1600 utilizes a "LIVE" zero and
condensed span adjustment so that a 4.00 milliamp input produces 50 AtoD counts and a 20
milliamp input produces 4050 counts. The system micro-processor then utilizes these digital
counts in determining the product level in the tank. The current ATOD count for each tank can
be viewed individually from the Single tank screen by pressing the <TIME/ZERO> button. These
values can be used as a reference to view and/or adjust the transmitter zero offset when a tank
is empty.
