Walchem WebMaster Manuel d'instructions télécharger pdf (Page 75)

If you select Off, the valve will not open again until either Hand or Auto is selected! If you select

Hand, the valve will open until either Auto or Off is selected, or until the Hand Time Limit

(programmed in the next menu) expires.

The Off mode is handy to prevent the valve from opening while you are changing set points. The

Hand mode is handy to be able to test the valve, wiring, etc without needing to change set points.

Event Log

Click on the link to view the event log. The event log contains the date and time of each relay

activation and deactivation. The data will be a 1 if the relay is closed and a 0 if the relay is open.

The log also shows the state of the flow switch, with a 1 denoting flow, and a 0 denoting no flow.

A window will open to ask if you would like to open the file or save it to disc. Select the method

you would like to use. The file is a .csv (comma separated variable) file that will open in a

spreadsheet such as Excel.

6.20 Feed Output Menu

Feed Mode

Click on the radio button of the option that you want to use.

Bleed and Feed mode will add inhibitor at the same time as the bleed valve opens, for the same

amount of time. A lockout timer will stop inhibitor feed if the feed time exceed the programmed

limit.

Feed After Bleed mode will add inhibitor after the bleed has finished, for a programmed

percentage of the bleed time.

Feed Based on Makeup Volume mode will add inhibitor for a programmed amount of time after

a specified volume of makeup water has entered the system. This option can only be used if a

water meter is installed in the makeup water line.

Feed as % of Time mode will add inhibitor for a programmed amount of time, after a

programmed amount of time has elapsed.

Other (4-20 mA input 5) is used to control the feed relay based upon a signal from a transmitter

that is connected to 4-20 mA input number 5. This option is only possible if your controller is

equipped with the analog input option card.

Above Feed Modes, Multiple Sources are used to specify a different amount of Feed time

depending upon which makeup water source is currently supplying the tower. The makeup water

source is determined by comparing the measured makeup water conductivity with the ranges of

conductivity for each source (entered below, or in the Bleed page).

If you change the Feed Mode in this page, you must click on the Submit button to see all the

correct menus for that mode on this page.

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Walchem WebMaster Manuel d'instructions Page 75