Cornwall Digital Timer for Increased Inductive Loads

Product detailed description

Cornwall Electronics digital timer enables automatic switching of mains-powered appliances with accuracy to 1 minute. The timer supports daily and weekly switching cycles and is equipped with a backup battery that preserves the settings for 100 hours even in the event of a power cut. Silent – without mechanical gears or ticking.

Key features

• Type: digital, weekly programmer
• Switching accuracy: 1 minute (min. interval)
• Number of programmes: 8 daily programmes (up to 112 different switching combinations per week)
• Day selection: 16 preset groups of days or combinations of days of the week
• Max. switching load: 3,500 W
• Backup battery: preserves settings during a power cut for min. 100 hours; the battery charges from the mains
• Display: LCD
• Summertime function: automatic switching between summer and winter time
• Random function: irregular switching to simulate people being present
• Operating temperature: −10 °C to +40 °C
• Operation: silent – without mechanical gears

How to use

Plug the timer into a socket and allow the backup battery to charge (ideally, leave it connected for the first few hours). Then set the current time and programme the required switch-on and switch-off times using the buttons. Select a group of days from the 16 preset combinations. Plug the appliance into the timer socket. In the event of a mains failure, the timer will retain the settings thanks to the backup battery. If the display does not respond, press the Reset button (a small hole for a pen tip).

Specifications

• Max. switching load: 3,500 W
• Min. switching interval: 1 minute
• Number of programmes: 8 (weekly; up to 112 combinations)
• Preset groups of days: 16
• Backup battery: yes (charges from the mains, min. 100 h autonomy)
• Display: LCD
• Operating temperature: −10 °C to +40 °C

Frequently asked questions

Why does the display show nothing after connection?

The backup battery in the timer may be discharged. Plug the timer into a socket, allow it to charge and then press the Reset button (a small hole for a pen tip) for several seconds.

Can I use the Random function for a grow light?

Do not use the Random function for plant lighting – irregular switching could cause stress. The function is intended to simulate people being present at home when they are away.

Can the timer handle a 600 W HPS discharge lamp?

Yes, the maximum load is 3,500 W. When switching several discharge lamps at once or lamps with a high inrush current, it is advisable to connect the timer through a contactor to extend its service life.