ATI
Q46H/65 Residual Chlorine Dioxide System
Part 6
– Configuration
40
O&M Manual
Rev-J (11/18)
*Relay D Mode
OPTIONAL.
Relays D,E, and F can be used in two ways: as a setpoint
*Relay E Mode
control, or as an alarm. The two settings for Relay B Mode are
CON
and
*Relay F Mode
FAIL
.
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 25 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, ClO
2
+ pH output.)
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. 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 ClO
2
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 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. 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.
