Filter
Top Products
47
MODEL FCL-1056 SECTION 6.0
CALIBRATION
6.4.5 Procedure-Standardization
1. The pH value measured by the analyzer can be changed to match the reading from a second or referee
instrument. The process of making the two readings agree is called standardization.
2. Place the sensor in the flow cell. Wait until pH readings are stable.
3. Press MENU. The main menu screen appears. The cursor will be on
Calibrate. Press ENTER.
4. Choose the sensor you wish to calibrate. Sensor 1 is the chlorine sensor.
Sensor 2 is the pH sensor.
5. Choose pH.
6. Choose Standardize.
7. Once reading is stable, measure the pH of the liquid using a referee
instrument. Because the pH of many natural and treated waters depends
on temperature, measure the pH of the sample immediately after taking
it. For poorly buffered samples determine the pH of a continuously
flowing sample from a point as close as possible to the sensor.
Change the reading to match the reading of the referee instrument.
8. If the calibration is successful, the screen at left will be displayed for five
seconds. The display will then return to screen in step 3.
If the calibration is not successful, the existing calibration data will not be
changed. A screen will appear identifying the error (high slope, low slope,
or offset error). For troubleshooting see section 9.5.
9. To return to the main display, press MENU then EXIT.
Calibrate?
Sensor 1
Sensor 2
Output 1
Output 2
S2 Calibration
pH
ORP
Redox
Temperature
pH
S2 pH Cal
Buffer Cal
Standardize
Slope: 56.19 mV/pH
Offset: 2 mV
Standardize
Sensor 2
S2 pH Cal
Slope: 56.19 mV/pH
Offset: 2 mV
S1 Enter Value
0 7.00 pH
0