ATI
Q45P pH System
Part 4
– Configuration
25
O&M Manual
Rev-B (7/15)
Main
Display
This function allows the user to change the measurement in
the primary display area. The user may select between pH,
sensor temperature, or output mV. Using this function, the
user may choose to put temperature in the main display area
and pH on the secondary, lower line of the display. Press
ENTER to initiate user entry mode, and the entire value will
flash. Use the UP arrow key to modify the desired display
value. Press ENTER to store the new value.
Select TC
This function allows the user to select either a Pt1000 or
Pt100 platinum RTD temperature element. The Pt1000
element is the standard element in all high performance Q25
sensors; it is the recommended temperature sensing
element for all measurements. The Pt100 selection is
provided as an alternative for use with existing combination-
style sensors. Press ENTER to initiate user entry mode, and
the entire value will flash. Use the UP arrow key to modify
the desired value. Press ENTER to store the new value.
Sensor Type
This function sets the sensor input type. This selection is
critical for control of the internal diagnostics and
compensation factors. Press ENTER to initiate user entry
mode, and the entire value will flash. Use the UP arrow key
to modify the desired value. Selections are
1
for Q25P glass
sensor,
2
for combination electrode,
3
for Q25P antimony
electrode, and
4
for pure water sensor using special
compensation table. Press ENTER to store the new value.
Auto Buffer
This is a multiple variable function that allows the user to
choose which pH buffer sets that will be utilized in the 2-
point calibration mode. The Q45P contains 3 sets of built-in
buffer tables with compensation values ranging from 0 to 95
°C. During 2-point calibration, the instrument will
automatically identify which buffer is being used and
compensate for the value based on the built-in tables. This
allows very quick, highly accurate calibrations by the user.
The order in which the buffers are used during calibration is
unimportant, since the system automatically chooses the
correct buffer.
The default setting for this feature is
OFF
, which disables the
auto-recognition function. Press ENTER to change this
setting. The buffer table set options are: 1: [4/7/10], 2:
[4/7/9.18], and 3: [4.65/6.79/9.23]. See Figure 4-4 for buffer
tables. Once the buffer set is selected, press ENTER and
