ATI Q46H/85 PAA System Part 6 – Configuration
39
O&M Manual
Rev F (8/17)
The CON setting enables normal setpoint operation for Relay B. Relay B
then operates identically to Relay A, with settings for setpoint, hysteresis,
delay and phasing appearing in the CONFIG menu automatically. See
Figure 19 for details.
The FAIL setting enables the fail alarm mode for Relay B. Relay B will
then trip on any condition that causes the FAIL icon to be displayed on
the LCD. Using this mode allows the User to send alarm indications to
other remote devices. See Figure 26 for details.
Temp Units This function sets the display units for temperature measurement. Press
ENTER to initiate user entry mode, and the entire value will flash. Use
the UP arrow key to modify the desired display value. The choices are
°F and °C. Press ENTER to store the new value.
pH Input Enables the auxiliary pH input on the instrument. Once enabled, an
optional pH sensor can be added to the instrument to provide for
additional monitoring of pH (dual instrument, PAA + pH output.)
For the relay-based analyzer with two analog outputs, the pH signal can
also be sent to one of the analog outputs for monitoring of pH. Once
enabled, the pH input value is displayed on the lower line of the
MEASURE screens. Press ENTER to initiate user entry mode, and the
entire value will flash. Use the UP arrow key to modify the desired
display value. The choices are OFF and ON. Press ENTER to store the
new value.
pH Type Allows the user to select either 1-Comb or 2-Q22P. The 1-Comb
selection configures the monitor for a standard pH electrode without
using its temperature compensation but in turn, uses the temperature
compensator from the PAA sensor. The 2-Q22P selection configures the
monitor for use with the Q22P sensor or for the 4-20 mA input from any
other pH monitor.
pH 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
Q46H 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 24 for buffer tables. Once the buffer set is selected, press
ENTER and the message Accepted! will be displayed on the lower line.
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