User Manual

Section 2: General operation Series 2200 Programmable DC Power Supplies Reference Manual
2-12 2200S-901-01 Rev. A/November 2011
Upper display messages
The instrument shows messages on the upper row of the display to indicate output operating and
error conditions. See Configuring the instrument for your application (on page 2-16) for general
information about these messages. See the following tables for the messages and a description of
what the messages indicate.
Operating conditions
Messages
Description
OFF
Power supply output is off.
CV
Instrument is operating in constant voltage (CV) mode.
CC
Instrument is operation in constant current (CC) mode.
RI
Instrument output has been turned off by the remote inhibit (RI) input. See
[SOURce:]DIGital:FUNCtion (on page 4-12) for more information.
Error conditions
Messages
Description
OVP
Instrument has sensed a voltage level above the threshold set for overvoltage control
and turned off the output. See Setting the overvoltage protection (on page 2-19) for
more information.
RSV
Instrument has sensed a reverse remote sense polarity condition and turned the output
off. Polarities of source and sense connections must be the same. See Using remote
sense (on page 2-23) for more information.
OTP
Instrument has sensed an excessive internal temperature and turned off the output.
If the instrument displays the OTP message, the instrument should be shut down immediately .Do not
operate the instrument when temperatures are above the internal temperature trip level to avoid
damaging internal components.
Lower display messages
The instrument shows the following messages on the lower row of the display.
Message
Description
OVP
If overvoltage protection (OVP) is set, the instrument displays the OVP message to
Indicates that OVP is set. Flashes when OVP has tripped. See Setting the overvoltage
protection (on page 2-19) for more information.
Lck
If the front-panel controls are locked, the instrument displays the Lck message. See
Configuration menus description (on page 2-9) for information on the >Protect >Key
Lock configuration. See Keypad special operations (on page 2-8) for information on
unlocking the front panel controls.