MODEL TCL

SECTION 6

 

START-UP

6.5 USING HOLD

6.5.1 Purpose

To prevent unwanted alarms and improper operation of control systems or dosing pumps, place the alarms and outputs assigned to the sensor in hold before removing it for maintenance. During hold, outputs assigned to the sensor remain at the last value, and alarms assigned to the sensor remain in their present state.

Once in hold, the sensor remains in hold until hold is turned off. However, if power is lost then restored, hold will automatically be turned off.

6.5.2 Using the Hold Function.

1.Press MENU. The main menu screen appears. Move the cursor to

Program.

Menu

Calibrate

Hold

Program

Display

2. Choose HOLD.

 

 

Hold

 

 

S1Holdld

 

No

S2 Hold

No

 

 

 

3.The screen shows the current hold status for each sensor. Select the sensor to be put in hold. Press ENTER.

S1 Hold outputs

and alarms?

No

Yes

No

4.To put the sensor in hold, choose Yes. To take the sensor out of hold, choose No.

Once in hold, the sensor remains in hold until hold is turned off. However, if power is lost then restored, hold will automatically be turned off.

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Emerson TCL instruction manual Using Hold

TCL specifications

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