ATI
Q46UV UV254/Turbidity Monitor
Part 5 - Configuration
29
O&M Manual
Rev-D (11/19)
5.22 Measure Menu [MEASURE]
The default menu for the system is the display-only menu MEASURE. This menu is a display-only
measurement menu, and has no changeable list items. When left alone, the instrument will
automatically return to this menu after approximately 30 minutes. While in the default menu, the
UP arrow allows the user to scroll through the secondary variables on the lower line of the
display. A brief description of the fields in the basic transmitter version is as follows:
TRANSMITTER MEAS SCREENS:
XX.X NTU
Displays the measured turbidity value. Sensors contain both UV and IR
sensors. IR sensors are used to measure 90 degree scatter turbidity.
25.7°
Temperature display. Can be displayed in °C or °F, depending on user
selection. A small “m” on the left side of the screen indicates the
transmitter has automatically jumped to a manual 25C setting due to a
failure with the temperature signal input.
XX.X UVT
Displays the UV Transmittance value, which another way of expressing
UV measurement. As UVA increases, UVT will decrease but they are
not linear functions.
XX.X mg/l
This display shows the equivalent dissolved organic carbon related to the
UVA measurement. It is based on a default table programmed in
instrument memory.
XX.X IRT
Displays the value of Infrared indicates the background ambient light
level detected by the sensor. This value is not meaningful when the
sensor is inside the flowcell, but is useful when submersible turbidity
sensors are used in open channels. Extremely high ambient light levels
will trigger an alarm.
100% 20.00 mA
PID Status screen (if enabled.) Shows the present controller output level
on left, and actual transmitter current on the right. The controller can be
placed in manual while viewing this screen by pressing and holding the
ENTER key for 5 seconds until a small flashing “m” appears on the
screen. At that point the controller output can be adjusted up or down
using the UP and LEFT arrow keys. To return to automatic operation,
press and hold the ENTER key for 5 seconds and the “M” will disappear.
#1 4.00 mA
Analyzer output current # 1 (normally NTU)
#2 12.00 mA
Analyzer output current # 2 (normally Temperature)
#3 20.00 mA
Analyzer output current # 3 (if option included.)
Aux relay= D,E,F
Auxiliary relay annunciators (if option included.)
Q46UVA vX.XX
Transmitter software version number.
UV-1 VerXXXX
Sensor firmware version number.
I/F vX.XX
Transmitter scaling card firmware version number.
