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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.
2. Choose HOLD.
3. The screen shows the current hold status for each sensor. Select the
sensor to be put in hold. Press ENTER.
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.
Hold
S1 Hold No
S2 Hold No
S1 Hold
Menu
Calibrate
Hold
Program
Display
Hold
S1 Hold outputs
and alarms?
No
Yes
No