Measurement Ranges And Maximum Readings; Manual Ranging - Keithley 2750 User Manual

4-2 Range, Digits, Rate, Bandwidth, and Filter
Range
The range setting is "remembered" by each measurement function. When you select a
function, the instrument will return to the last range setting for that function.

Measurement ranges and maximum readings

The selected range affects both accuracy of the measurement as well as the maximum
level that can be measured. The measurement ranges and maximum readings for all func-
tions, except FREQ, PERIOD, and TEMP, are listed in
Input values that exceed the maximum readings cause the message "OVERFLOW" to be
displayed.
Table 4-1
Measurement ranges and maximum readings
Function
DCV
ACV
DCI
ACI
Ω2
Ω4 *
*Offset-compensated ohms and dry circuit ohms:
OCOMP — Offset-compensated ohms can be performed on the 1
Ω,
1k
DRYCKT — Available ranges for dry circuit ohms include the 1
and 1k
FREQ and PERIOD — Frequency measurements from 3Hz to 500kHz, and period mea-
surements from 2µs to 333µs can be made on the ACV ranges.
TEMP — There is no range selection for temperature measurements. Temperature mea-
surements are performed on a single, fixed range. Depending on which type of sensor is
being used, the maximum temperature readings range from –200°C to 1820°C.

Manual ranging

To change range, press the RANGE
key press. The selected range is displayed for one second. Note that the manual range keys
have no effect on temperature (TEMP).
100mV, 1V, 10V, 100V, 1000V
100mV, 1V, 10V, 100V, 750V
20mA, 100mA, 1A, 3A
1A, 3A
10Ω , 100Ω , 1kΩ , 10kΩ , 100kΩ , 1MΩ , 10MΩ , 100MΩ
1Ω , 10Ω , 100Ω , 1kΩ , 10kΩ , 100kΩ , 1MΩ , 10MΩ , 100MΩ 120MΩ
Ω
and 10k ranges.
Ω
ranges.
Model 2750 Multimeter/Switch System User's Manual
Table
Ranges
Ω Ω
, 10
Ω Ω
, 10
Δ ∇
or key. The instrument changes one range per
4-1.
Maximum
reading
±1010V
757.5V
±3.1A
3.1A
120MΩ
Ω
, 100 ,
Ω,
, 100