Maintenance - R&S NGL200 series User Manual

®
R&S NGL200
CR mode
CR mode is a special case of sink mode in which the instrument behaves like a con-
stant resistor. Only in this mode, the respective channel keys and display font color in
the home window turns cyan.
In "normal" sink mode, the colors are the same as in source mode: green if the current
flowing into the R&S NGL200 is below the set current and red if the current is limited to
the set value. The only visible indication of sink mode is the change of the sign of the
current readout change to "Minus".
Color illuminated on front panel keys and display
font color of voltage and current in home window
Green
Red
Cyan
Also, the operating symbol mode (CV, CC or CR) is displayed at the channel status bar
of the respective channel.

4.4 Maintenance

Before cleaning the instrument, ensure that it has been switched off and power cable is
disconnected.
Clean the outer case of the instrument at regular intervals, using a soft, lint-free dust
cloth.
Instrument damage caused by cleaning agents
Cleaning agents contain substances that may damage the instrument. For example,
cleaning agents that contain a solvent may damage the front panel labeling, plastic
parts, or the display.
Never use cleaning agents such as solvents (thinners, acetone, etc.), acids, bases, or
other substances.
The display may only be cleaned with an appropriate glass cleaner. Rub the display
down with a dry, clean and lint-free cloth. Do not allow cleaning fluid to enter the instru-
ment.
User Manual 1178.8736.02 ─ 02.01
Getting Started
Operating mode
Constant voltage mode (CV)
Constant current mode (CC)
Constant resistance mode (CR)
Note: Instrument is operated in sink mode and
"Constant Resistance" is activated.
Maintenance
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