Local Operation
Series 2268 850 Watt DC Power Supplies Reference Manual
44
2268S-901-01 Rev. A / January 2015
3.
Turn the rotary Adjust/Enter control until “NONE” is displayed in the output
current display.
4.
Press the rotary Adjust/Enter control to commit the setting once the desired value
has been set.
5.
The green FLD LED will turn off and the display will return to the normal display
mode.
The SCPI command (s) for these instructions are:
[:]SOURce[<channel>]:POWer:MODe[:STATe]
[:]SOURce[<channel>]:POWer:LEVel
ALARMS AND ERRORS
Several conditions can cause alarms in the POWER SUPPLY. Some conditions are:
•
From user configurable features.
•
Controlled in hardware and will trigger regardless of configuration.
All alarms, with the exception of the Fan alarm, will result in the output of the power supply
being disabled. The Fan alarm does not affect the output.
When an alarm is triggered, the appropriate alarm message will begin blinking on the display
and the Alarm
LED
will be illuminated. It is possible that more than one alarm will trigger at
the same time. When this occurs, the alarm with the highest precedence will blink on the
display.
The table that follows li
sts the precedence of alarms. If the alarm is cleared and the
event which caused the alarm has not been corrected, then the alarm may trigger again
immediately. Fix the reason for the alarm before you clear it.
Alarm
Precedence
Output
Latch
Maskable
Display
AC Fail
1 (Highest)
Yes
No
Over Temperature Protection (OTP)
2
Yes
No
OtP
Fan
4
No
Yes
Interlock
6
No
No
In Loc
Over Voltage Protection (OVP)
7
Always
No
Over Current Protection (OCP)
8
Always
No
Foldback
9
Yes
Yes
External Shutdown
10
No
Yes
Under Voltage Protection (UVP)
11 (Lowest)
No
Yes
Current Loop Protection
12 (Lowest)
Loop Pro
Flash Checksum Failure
1
N/A
N/A
N/A
1.
The Flash Checksum Failure alarms are an exception as they can only occur during boot up or
recalling a user setting slot. If a checksum error is detected when recalling a user slot, no modification of
settings will occur, and an error will be pushed to the SCPI error queue. If a checksum occurs at boot-up,
then this checksum error can be cleared by doing a soft reset or by power cycling the unit.
Содержание Keithley 2268 Series
Страница 102: ......
