ATI
Q46H/63 Combined Chlorine System
Part 6 – Configuration
39
O&M Manual
Rev-K (11/18)
Slope = 100%
pH sensor slope response vs. ideal calibration. This value will update
after each calibration. As the pH sensor ages, the slope reading will
decay. This is useful for solving sensor problems (if enabled).
Offset = X.X V
pH sensor voltage output at 7 pH. 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 Cl
2
, Cal pH (if enabled), Cal Temp and Set Range.
Cal Cl
2
The chlorine 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.
