ATI
Q46H/65 Residual Chlorine Dioxide System
Part 6
– Configuration
37
O&M Manual
Rev-J (11/18)
Offset = X.X mV
pH sensor current output at 7 pH input. This value updates after
calibration is performed and is useful for resolving sensor problems.
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 four
items in this list: Cal Chlor, Cal pH (if enabled), Cal Temp and Set Range.
Cal ClO
2
The ClO
2
calibration function allows the user to adjust the analyzer span reading
to match a reference solution, or to set the sensor zero point. See Part 7
Calibration for more details.
Cal pH
The pH calibration function allows the user to (
if enabled)
adjust the analyzer
offset and span to match the sample or reference buffers. 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.
Set Range
This function allows the user to set the display range of the analyzer to a specific
application. Once set, all output functions use this display range to establish
configuration settings. Press ENTER to initiate user entry mode, and the value
will flash. Use the arrow keys to modify value; available ranges include 200.0
ppb, 2.000 ppm, 20.00 ppm, and 200.0 ppm. Press ENTER to store the new
value. The display range does not affect the internal auto ranging scaler that,
therefore, sensitivity is to specification in any user selected range.
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 analyzer 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 end of manual for the
Q46H lock/unlock code.
Press ENTER to toggle lock setting once code
is correct. Incorrect codes do not change state of lock condition.
