ATI Q46D Dissolved Oxygen System Part 6 - Configuration
31
O&M Manual
Rev-N (4/21)
Tcyc 24.0 hr Automatic sensor cleaning frequency (displayed only when enabled by
programming relay B for Cln1 or Cln2).
Note: A display test (all segments ON) can be actuated by pressing and holding the
ENTER key while viewing the model/version number on the lower line of the
display.
The MEASURE screens are intended to be used as a very quick means of looking up critical
values during operation or troubleshooting.
6.23 Calibration Menu [CAL]
The calibration menu contains items for frequent calibration of user parameters. There are two
items in this list: Cal D.O. and Cal Temp.
Cal D.O. The oxygen calibration function allows the user to adjust the transmitter
span reading to match a reference solution, or to set the sensor zero
point. See Part 7 - Calibration for more details.
Cal Temp The temperature calibration function allows the user to adjust the offset
of the temperature response by a small factor of ± 5°C. The temperature
input is factory calibrated to very high accuracy. However, long cable
lengths and junction boxes may degrade the accuracy of the temperature
measurement in some extreme situations. Therefore, this feature is
provided as an adjustment. See Part 7 - Calibration for more details.
6.24 Configuration Menu [CONFIG]
The Configuration Menu contains all of the general user settings:
Entry Lock This function allows the user to lock out unauthorized tampering with
instrument settings. All settings may be viewed while the instrument is
locked, but they cannot be modified. The Entry Lock feature is a toggle-
type setting; that is, entering the correct code will lock the transmitter and
entering the correct code again will unlock it. The code is preset at a
fixed value. Press ENTER to initiate user entry mode and the first digit
will flash. Use arrow keys to modify value. See Spare Parts List at the
end of this manual for the Q46D lock/unlock code. Press ENTER to
toggle lock setting once code is correct. Incorrect codes do not change
state of lock condition.
Set Delay The delay function sets the amount of damping on the instrument. This
function allows the user to apply a first order time delay function to the
oxygen measurements being made. Both the display and the output
value are affected by the degree of damping. Functions such as
calibration are not affected by this parameter. The calibration routines
contain their own filtering and stability monitoring functions to minimize
the calibration timing. Press ENTER to initiate user entry mode, and the
value will flash. Use the arrow keys to modify value; range is 0.1 to 9.9
minutes. Press ENTER to store the new value.
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