The transmitter will not update the zero current. For troubleshooting assistance, see
Section 11.5.
10. To return to the main display, press MENU and then EXIT.
9.3.3 Procedure - calibrating the sensor
Complete the following steps to calibrate the total chlorine sensor with the full scale
standard solution.
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 operating
range. Wait until the transmitter reading is stable before starting 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 is on Calibrate.
4. Press ENTER.
5. Choose the sensor you wish to calibrate.
Sensor 2 appears only if you have a dual input Rosemount 1056 Transmitter.
6. Choose Total Chlorine.
Calibration
Instruction Manual 67
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