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MODEL TCL SECTION 9
CALIBRATION
If the zero current is much larger than expected, the zero calibration
failure screen appears. The analyzer will not update the zero current. For
troubleshooting assistance, see Section 11.5.
8. To return to the main display, press MENU then EXIT.
S1 Zero Cal
Sensor zero failed
Press Exit
9.3.3 Procedure — Calibrating the sensor
1. If the sensor was just zeroed, place the sensor back in the flow cell. Confirm that excess sample is flowing down
the inside tube of the overflow sampler. Also, verify that reagent is being delivered to the sample and that the air
pump is working.
2. Adjust the chlorine concentration until it is near the upper end of the control range. Wait until the analyzer reading
is stable before starting the calibration. When the TCL is first started up or when a new sensor is put in service,
allow at least 30 minutes for the reading to stabilize.
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 2 appears only if
you have a dual input 1056 analyzer.
5. Choose Total Chlorine.
6. Choose In Process Cal
Calibrate?
Sensor 1
Sensor 2
Output 1
Output 2
S1 Calibration
Temperature
Total Chlorine
S1 Calibration
Zero Cal
In Process Cal
Zero Cal
Sensor 1