Datasheet

16 | Keysight | U1240 Series Handheld Digital Multimeters - Data Sheet
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U1240B Series Switch Counter Definition
Switch condition
1, 2
Circuit switch Display
3
Switch threshold
Low level Normally close Lo < 370 ohms
Intermittent
4
Close to open Number of switch count Low to high transition
High level Normally open Hi > 430 ohms
Intermittent
5
Open to close Number of switch count High to low transition
1. Detects intermittent Opens or Closes lasting for at least 250 μsec.
2. Test current of 0.5 mA with maximum open circuit voltage of 2.8 V is used.
3. Maximum count reading: 199.99 M (display “OL” when achieving 2 x 108 and thereafter).
4. Count only low to high transition for initial switch condition of Low.
5. Count only high to low transition for initial switch condition of High.
U1240B Series Frequency Specifications
Range Resolution Accuracy Minimum input frequency
100.00 Hz 0.01 Hz
0.03% + 3 1 Hz
1000.0 Hz 0.1 Hz
10.000 kHz 0.001 kHz
100.00 kHz 0.01 kHz
1000.0 kHz
1
0.1 kHz
1. Effective frequency measurement of up to 200 kHz; refer to frequency sensitivity table below for details.
U1240B Series Frequency Sensitivity During Voltage Measurement
Input range (Maximum input for specified accuracy = 10 x Range or 1000 V) Minimum sensitivity (RMS sine wave)
20 Hz to 50 kHz 50 to 200 kHz
1000.0 mV 0.3 V 0.6 V
10.000 V 0.5 V 1.8 V
100.00 V 5 V 10 V (< 100 kHz)
1000.0 V 50 V 100 V (< 100 kHz)
U1240B Series Frequency Sensitivity During Current Measurement
Input range Minimum sensitivity (RMS sine wave)
20 Hz to 20 kHz
1000.0 μA 100 μA
10000 μA 500 μA
100.00 mA 10 mA
440.00 mA 50 mA
10.000 A 1 A