MODEL TCL

SECTION 7

 

PROGRAMMING THE ANALYZER

7.6 CONFIGURING TEMPERATURE RELATED SETTINGS

7.6.1 Purpose

This section describes how to do the following:

1.Choose temperature units.

2.Choose automatic or manual temperature correction for membrane permeability (chlorine sensor).

3.Enter a temperature for manual temperature compensation.

7.6.2 Definitions - Chlorine

1.AUTOMATIC TEMPERATURE CORRECTION. The total chlorine sensor is a membrane-covered amperometric sensor. The permeability of the membrane is a function of temperature. As temperature increases, membrane permeability increases. Thus, an increase in temperature will cause the sensor current and the analyzer reading to increase even though the chlorine level remained constant. A correction equation in the analyzer software automatically corrects for changes in membrane permeability. In automatic temperature correction, the analyzer uses the temperature measured by the sensor for the correction.

2.MANUAL TEMPERATURE CORRECTION. In manual temperature correction, the analyzer uses the temper- ature entered by the user for correction. It does not use the actual process temperature. Do NOT use manual temperature correction unless the measurement and calibration temperatures differ by no more than about 2ºC. Manual temperature correction is useful if the sensor temperature element has failed and a replacement sensor is not available.

7.6.3Procedure – Configuring Temperature Related Settings

1.Press MENU. The main menu screen appears. Move the cursor to Program and press ENTER.

Program

Outputs

Alarms

Measurement

Temperature

2.Choose Temperature.

Temperature

Units:Units:C

S1 Temp Comp: Auto

3.The screen summarizes the present sensor configuration. There will be between two and five items. Units and S1 Temp Comp, always appear. If manual temperature compensation was selected, the manual temperature value will also appear. If you have a dual input analyzer, temperature compensation items will appear for the other sensor. Only four items are shown at a time. To view the remaining items, scroll to the bottom of the screen and continue scrolling.

To make a change, move the cursor to the desired line and press ENTER. A screen will appear in which the present setting can be edited. To store a setting, press ENTER.

For an explanation of terms, see sections 7.6.1 and 7.6.2.

4. To return to the main display, press MENU then EXIT.

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Emerson TCL instruction manual Configuring Temperature Related Settings, Program Outputs Alarms Measurement
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TCL specifications

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