High-Speed Digital Multimeters with Variable Integration
The ADCMT 7461A, 7461P, and 7451A combine high-speed sampling, variable integration, trigger functions, and two-channel DC voltage capability for waveform capture, data logging, and precision electrical measurement.
The 7461A and 7461P provide 6½-digit resolution and sampling rates up to 20,000 readings per second. The 7451A provides 5½-digit resolution with sampling rates up to 5,000 readings per second.
Up to 20,000 rdgs/s
High-speed internal memory sampling
10 μs to 10 s
Variable integration on 7461A and 7461P
1 nA Resolution
Low-current measurement on 7461A and 7461P
Two-Channel DCV
Additional fixed 10 V DC voltage input
Variable analog integration supports accurate average measurement of pulsed voltage and current signals. Level, delta, pre-trigger, and external trigger functions help capture signal changes and events at defined measurement timing.
All three models include low-power resistance measurement and standard USB and GPIB interfaces. The 7461P adds Pt100 and JPt100 temperature measurement with resolution down to 0.001°C.
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High-Speed Sampling
Capture up to 20,000 readings per second with the 7461A and 7461P or up to 5,000 readings per second with the 7451A.
Variable Integration Time
Set integration time from 10 μs to 10 s on the 7461A and 7461P or from 100 μs to 10 s on the 7451A.
Advanced Trigger Functions
Level, delta, pre-trigger, and external trigger functions support waveform capture and event-based measurement.
Low-Power Resistance Measurement
Two-wire and four-wire low-power resistance modes reduce measurement-current heating in thermistors and other sensitive components.
Two-Channel DC Voltage Capability
A fixed 10 V Channel B input supports sequential two-channel DC voltage measurement or combined voltage and current measurement.
Precision Temperature Measurement
The 7461P supports Pt100 and JPt100 sensors with temperature resolution down to 0.001°C.
High-speed pulse waveform digitization
Standby and average current measurement
Low-current electronic device evaluation
Interval-based measurement and data logging
Rising-signal and abnormal-event capture
Thermistor low-power resistance measurement
Temperature measurement with the 7461P
Automated production and inspection systems
7461A / 7461P / 7451A Specifications
| Specification | 7451A | 7461A | 7461P |
|---|---|---|---|
| Display Resolution | 5½ digits | 6½ digits | 6½ digits |
| Maximum Display | 319,999 | 1,199,999 | 1,199,999 |
| Maximum Internal Sampling Rate | 5,000 readings/s | 20,000 readings/s | 20,000 readings/s |
| Maximum GPIB Transfer Rate | 1,000 readings/s | 1,000 readings/s | 1,000 readings/s |
| Variable Integration Time | 100 μs to 10 s | 10 μs to 10 s | 10 μs to 10 s |
| Sampling Period | 200 μs to 3,600 s | 50 μs to 3,600 s | 50 μs to 3,600 s |
| DC Voltage | 1 μV to 1000 V | 100 nV to 1000 V | 100 nV to 1000 V |
| DC Voltage Accuracy | 0.01%/year, typical | 0.0035%/year, typical | 0.0035%/year, typical |
| DC Current | 10 nA to 3 A | 1 nA to 3 A | 1 nA to 3 A |
| Resistance | 100 μΩ to 300 MΩ | 100 μΩ to 100 MΩ | 100 μΩ to 100 MΩ |
| AC Voltage | 1 μV to 700 V True RMS | 100 nV to 700 V True RMS | 100 nV to 700 V True RMS |
| AC Voltage Frequency Range | 20 Hz to 300 kHz | 20 Hz to 300 kHz | 20 Hz to 300 kHz |
| AC Current | 10 nA to 3 A True RMS | 1 nA to 3 A True RMS | 1 nA to 3 A True RMS |
| Temperature Measurement | Not available | Not available | Pt100: −200°C to +850°C JPt100 supported |
| Data Memory | 10,000 readings | 10,000 readings | 20,000 readings |
| Channel B DC Voltage Input | Fixed 10 V range | Fixed 10 V range | Fixed 10 V range |
| Interfaces | USB, GPIB | USB, GPIB | USB, GPIB |
