GCU 15/25/100 –User guide 10/11
The range of 50 USER CONTROLLED settings are to be found in Channel Nos. 0 –
49, whilst the 50 FIXED FACTORY SETTINGS are confined to Channel Nos. 50- 99.
Whilst the 50 Factory Set Channels between 50 and 99 are fixed and cannot be
overwritten to Memory; the first 50 Channels (0 to 49) can be copied to the USER
MEMORY BANK for subsequent retrieval and use. However, any channel selected
from the 100 Switching Cycles available may be viewed for investigation or possible
adjustment even if a previous alternative Cycle had been selected for use.
Saving any adjustments made to a USER CONTROLLED Channel can be made when
the display ENTER:- Save / SCROLL to Swap is valid; with the Periods selected to
overwriting existing values in the User Memory.
The option ENTER:- NOT Save / SCROLL to Swap correspondingly allows the user to
utilize the Periods selected but not to save them for later use. The option to SAVE or
NOT SAVE is not available unless a change has been made and, of course, is only
valid for the USER CONTROLLED Channels 0-49.
3.3 Real-time capabilities
There is a REAL TIME CLOCK facility included whereby the Time of Day and actual
Day may be set up with the “Enter or Display the Time Of Day”and “Enter the Day’
options. Both functions require use of the SCROLL UP & DOWN and INCREMENT
& DECREMENT keys for setting up, with the SCROLL keys swapping between the
HOURS & MINUTES, whilst the INCREMENT & DECREMENT keys alter the
times associated with either the HOURS or MINUTES.
3.4 Sleep Mode option based on Real-time clock settings
A SLEEP Mode option is provided whereby any switching cycle may be temporarily
halted with the MOSFET held in the conducting condition for a period of time known
as the Sleep Period.
The Sleep Period is selected using the Scrolled function “Adjust SLEEP Times/Days
?“, with the Commence & Finish SLEEP Times adjusted using both SCROLL and
INCREMENT/DECREMENT Keys, The choice of a Day is made using the SCROLL
Keys for selecting a particular day or number of days. All days must be stepped
through in this instance, either SELECTING, or NOT SELECTING a particular day,
On any day selected, the unit inhibits the switching cycle during the period between
the hours and minutes set If the selected FINISH SLEEP time is less than the selected
COMMENCE SLEEP Time, then it is assumed that the Finish Time refers to the
following day. In this way, the Sleep Period may be extended to include the following
day. A selected Sleep Period may of course be set to operate every day by positively
selecting each day, or for over the weekend for instance by positively selecting only
SATURI)AY & SUNDAY. To be effective, it is essential that the REAL TIME
CLOCK is also correctly set up.
