User Manual

1-12 Getting Started 2400 Series SourceMeter
®
User’s Manual
Cooling fan
The Models 2410, 2420, 2425, 2430, and 2440 use a cooling fan to help keep
them from overheating. The Models 2400 and 2401 do not have a cooling fan. In
either case (fan or no fan), proper ventilation must be maintained to prevent
overheating. Refer to the “WARNING - CAUTION” located at the beginning of
Section 3 for details on maintaining proper ventilation.
Model 2410 — Uses a constant-speed fan that runs continuously while the power
is on.
Models 2420, 2425, 2430, and 2440 — Uses a 3-speed fan. With the OUTPUT
ON, the fan speed setting is determined by the present current range (source or
measure).
When the OUTPUT is turned OFF, the fan will either run at the low speed or stay
at the speed it was at when the output was on (current range dependent). This
speed option is set from the FAN selection of the GENERAL MENU. (See “Main
menu” in this section.)
NOTE If the Model 2420, 2425, 2430, or 2440 overheats, the output will trip and
the cooling fan will run at high speed (regardless of the speed option set
-
ting). See Section 6, “Overheating protection,” for details.
2420, 2425, 2430, and 2440
range
Fan speed
10uA, 100uA, 1mA Low (50%)
10mA, 100mA Medium (75%)
1A, 3A, 3A/10A (2430) High (100%)
1A, 5A (2440) High (100%)