SECTION 4
OPERATION
66
4.6.3.8 KEYBOARD LOCK
KEYBOARD LOCK SETUP allows you to control the keyboard lock feature and is accessed from the
General Setup menu (
fn
,
3
,7,2).
KEYBOARD LOCK SETUP: LOCK=OFF
(Press +/- Key to Toggle Selection)
(Press ENTER or EXECUTE to Exit)
LOCK=
:
OFF
or
ON.
OFF
- The keyboard is always enabled. This is the default setting.
ON
- The keyboard is locked and disabled after pressing the
DISPLAY
key. Key presses are
ignored when the keyboard is locked. The only exceptions are:
DISPLAY
– allowing access to all the metering displays
CLEAR
– to return to any previous display
OUTPUT ENABLE
– to apply power to the output terminals
To enable the keyboard, press both
fn
and
EDIT
. The keyboard remains enabled until
DISPLAY
is pressed.
4.6.3.9 CURRENT PROTECT
CURRENT PROTECT SETUP allows you to enable and disable the CURRENT PROTECT feature and is
accessed from the General Setup menu (
fn
,
3
,7,3).
CURRENT PROTECT SETUP:
PROTECT = OFF
(Press +/- Key to Toggle Selection)
(Press ENTER or EXECUTE to Exit)
PROTECT=
:
OFF
or
ON.
OFF
- The CURRENT PROTECT feature is not active.
ON
- The power source will normally operate in constant voltage mode. If the load current exceeds
the set Current Protect limit for a time interval that exceeds the protection delay setting, then the
power source will generate a fault condition and the output relay will open, disconnecting the load.
To set the CURENT PROTECT values for a Program, see Program Editing (
Notes:
1. During system operation, the UPC must be metering system output for Current Protect to operate.
Current Protect (as with voltage and current metering) is disabled during program edit or UPC.
2.
When the System Output is disabled due to Current Protect, the UPC will display, “ERROR –
CURRENT PROTECTION TRIGGERED”. Either the CLEAR or DISPLAY button must be depressed
to clear the fault before the UPC32 OUTPUT ENABLE switch will operate.
3. It is recommended the Current Limit (Ilim) be set to a value greater than Current Protect (IprA).
Setting current limit at or below current protect value will prevent Current Protect from disabling the
power source output.
4.
During “Transient Operation”, UPC Metering timing is modified. Subsequently, Current Protection
operation may be affected.
