AMMONIA User Manual
AMMONIA_User 9/09
2
7
To calibrate a sensor, key
UP
or
DOWN
to the target sensor and press
ENTER
.
Key
ENTER
@
Calibrate
.
Displays current value. Key
ENTER
to modify.
Key
UP
or
DOWN
to change the underlined digit.
Key
RIGHT
to move the digit underline.
Press
ENTER
to calibrate.
or
EXIT
to leave unchanged.
In this example we increased the value measured by a NH3
sensor from
1.30 ppm
to
1.60 ppm
.
Calibrate
Alarms
Enter Value
1.30 ppm
Sensor Calibrate
Editing, or Exit
1.60 ppm
NH3
1.30 ppm
D
Sidebar:
Single Point and Two Point Sensor Calibration:
The pH, temperature, and Ammonia sensors
should be initially calibrated using two points. For example, the pH should be calibrated using
standard pH buffer solutions of 7 and 10 for the low and high points, respectively. The Analyzer
supports direct sets of sensor OFFSET & GAIN values. After the initial two point calibration, we
recommend that you perform a single point calibration. This can be done by measuring a sample
from the sensor sample header and calibrating the sensor based on the grab sample test value.
In most cases, it’s the simplest and most repeatable method.
Appendix E describes in more detail the single and two point calibration methods. The NH3
sensor should be calibrated based upon a Standard Methods procedure. The 1000 ml calibration
column is used to calibrate the NH3 sensor in its housing. The pH and and temperature sensors
should be temporarily removed from the sample header to perform their calibrations.
Calibration Faults:
Refer to the next page for options on fault.