ATI
Model A15/82 Fluoride Monitor with Auto-Calibration
20
O&M Manual
Rev-G (6/10)
20.
CALIBR. T: 3.0’
This routine specifies the amount of time that fluoride standard will be fed into the
chemistry module during the automatic calibration routine. The default is 3 minutes, which is the
recommended interval. Do not set this value for less than 2 minutes. A longer interval can be used if
desired, but is not normally necessary.
21.
HOLDING T: 1.0’
This routine specifies the period of time after completion of the automatic calibration
during which the analog and relay outputs are held. The default is 1 minute, but can be extended if
desired.
22.
STAND.: 1.02PPM
The fluoride standard used to calibrate the monitor can be any fluoride value within
the operating range. The default is 1 PPM because it is normally close to the desired operating value for
most drinking water fluoridation systems. However, the value can be adjusted if a different standard is
used.
23.
ZERO MAX 10 mV
When the automatic calibration is complete, the monitor analyzes the zero offset of
the sensor compared with a value calculated during a manual 2-point calibration. If the sensor has
drifted more than 10 mv, an alarm is activated. The zero drift allowed can be increased, but 10 mv is
adequate for fluoride sensors.
24.
Change A Nr.: No/Yes:
This routine allows you to enter your own access code number. Changing the
access number will restrict access to the configuration menu by anyone who does not know the number
you enter. To change the number, press UP to change the display to YES and press ENTER. Use the
UP or DOWN arrow to set the number you want and then press ENTER.
When you press ENTER, the display will show “Confirm Nr.: 0”. To change the access number, the
number must be entered twice. Use the UP or DOWN arrows to set the same number again and then
press ENTER. After the second entry, the new number will be stored and must be used to gain access to
the configuration menu from then on.
