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Digital Multimeter
7352A / 7352E
- New measurement environment by twin A/D converters
- Double the throughput by Ach/Bch synchronous measurement
- Wide dynamic range of 5½ digits on both Ach and Bch
- Wider current measurement range and parallel measurement with voltage or temperature
A ch: 10 pA to 2 A
B ch: 100 µA to 10 A - A variety of interfaces
7352A: USB, GPIB, RS-232
7352E: USB
The 7352A and the 7352E are the next-generation digital multimeters equipped with twin-A/D converters that enable fully-independent measurement of two-channel signals. These multimeters are suitable for high-speed measurement, parallel measurement of different functions and multi-channel measurement by configuring a system.
The channel A (Ach) has basic measurement functions including DC voltage/current, AC voltage/current, resistance and frequency measurement functions, while the channel B (Bch) has DC voltage/current, AC current and temperature measurement functions. Thus, higher throughput can be obtained with Ach/Bch synchronous measurement or Ach/Bch parallel measurement of different functions.
Furthermore, the dynamic range of current measurement has been broadened significantly, enabling measurement from low current of 10 pA to large current of 10 A.
The 7352A is equipped with a RS-232 interface in addition to USB and GPIB interfaces as standard for use in R&D and production lines. The 7352E is equipped with a USB interface as standard for low-cost system configuration.
Features
Improve the system throughput with minimum dispersion?
Twin A/D converters realize synchronous measurement of Ach and Bch functions. Even at the sampling rate per PLC at which noise rejection is possible, two-function measurement data can be obtained without switching the functions, allowing the significant improvement of the system throughput.
Measure Bch as well as Ach highly accurately?
Since Bch is fully independent from Ach, its measurement is not affected by the potential difference between them. In addition, high-accuracy Bch measurement is available with 5½-digit display. Moreover, this series is capable of high-accuracy parallel measurement of different measurement functions such as voltage/current, voltage or current/temperature, or AC/DC between Ach and Bch.
Measure much lower current?
The broadened dynamic range enables measurement of low power consumption. Ach has measurement ranges from 2 µA (10 pA resolution) to 2 A, and Bch has 10 A measurement range (100 µA resolution). Two functions such as current/voltage or current/temperature can be measured with high sensitivity and resolution and these results are dual-displayed.
Build up a system easily?
In building up a system, system interfaces are available for easy connection with a programmable controller. The 7352A is equipped with USB, GPIB and RS-232 interfaces as standard.
Free software to download the measurement data onto the Excel file is avaialble from our website.
Right and Left Display Combinations and Measurement Functions
Measurement Time
The maximum sampling rate is 140 readings/sec for 1-channel single measurement and 123 readings/sec for 2-channel synchronous measurement. The sampling rate per PLC at which noise rejection is possible is 46 readings/sec for single measurement and 40 readings/sec for synchronous measurement that are the highest rate in this class.
| RATE mode | Integration time | Display digits | Single measurement | Synchronous measurement | |||
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DCV DCI 2WΩ LP-2WΩ |
ACV ACI Continuity Diode |
ACV (AC+DC) ACI (AC+DC) |
DCV DCI 2WΩ LP-2WΩ |
ACV ACI Continuity Diode |
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| FAST | 2 ms | 19999 | 140 rdgs/s (7.1 ms) | 30 rdgs/s (33 ms) | 123 rdgs/s (8.1 ms) | ||
| MED (50 Hz) | 1 PLC | 199999 | 40 rdgs/s (25 ms) | 19 rdgs/s (52 ms) | 38 rdgs/s (26.3 ms) | ||
| MED (60 Hz) | 1 PLC | 199999 | 46 rdgs/s (21.7 ms) | 22 rdgs/s (45.4 ms) | 43.5 rdgs/s (23 ms) | ||
| SLOW1 | 100 ms | 199999 | 9.5 rdgs/s (105 ms) | 4.7 rdgs/s (212 ms) | 9.5 rdgs/s (105 ms) | ||
| SLOW2 | 200 ms | 199999 | 4.9 rdgs/s (205 ms) | 2.4 rdgs/s (412 ms) | 4.9 rdgs/s (205 ms) | ||
Applications
Evaluation of DC/DC Converter
The input and output characteristics, load regulation characteristics, conversion efficiency, and rise in temperature of a DC/DC converter can be evaluated by a single unit of the 7352A/7352E. This series has five measurement capabilities: input voltage/current on Ach, output voltage/current on Bch and temperature on rear TEMP. In addition, change in input current or temperature against load current fluctuation can be measured in real time by using two-channel parallel measurement. Thanks to complete isolation between the channels, the input and output of an isolated DC/DC converter can be measured by just one unit. The channel outputs of a multi-output converter can be also monitored simultaneously by using one unit per two channels. Even in such case, there is no crosstalk between the channels.
Testing of Power Unit
The conventional dual DMM has the following problems in testing a power unit.
- Switching measurement is required because of a single A/D converter.
- It takes time to switch the AC-DC functions.
- When there is a potential difference between Ach LO and Bch LO, a large measurement error occurs on Bch.
Thus, in such measurement, two digital multimeters are required. On the other hand, the 7352A/7352E is provided with completely isolated Ach, Bch and TEMP, and is equipped with two independent A/D converters. Thus, switching measurement and functional change are unnecessary, and high-throughput measurement is available without influence between the channels. It has six measurement capabilities: AC input voltage/current and frequency on Ach, DC output voltage/current on Bch, and temperature on rear TEMP.
Specifications
| 7352A/7352E | ||||
| Ach | Bch | |||
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Maximum display |
199 999 | 199 999 | ||
| Measurement speed (readings/s) | 140 max | 140 max | ||
| DC voltage measurement | 1 μV to 1000 V | 1 μV to 200 V | ||
| Accuracy (typical value) | 0.011 %/year | 0.011 %/year | ||
| DC current measurement | 10 pA to 2 A | 100 μA to 10 A | ||
| Resistance measurement | 1 mΩ to 200 MΩ | N/A | ||
| AC voltage measurement (True RMS) | 1 μV to 700 V | N/A | ||
| AC voltage frequency range | 20 Hz to 100 kHz | N/A | ||
| AC current measurement (True RMS) | 1nA to 2A | 100 μA to 10 A | ||
| Calculation function | ✓ | ✓ | ||
| Temperature measurement | K (CA) -50 ℃ to 1370 ℃ T (CC)-50 ℃ to 400 ℃ |
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| Data memory | 20,000 | |||
| Interface | 7352A: USB, GPIB, RS232C 7352E: USB |
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*For the detailed specifications, please download the brochure from "Download."
Appearance
Optional Accessories
High-Voltage Probe 1116
Voltage dividing ratio: 1: 1000
Input voltage dividing ratio precision: ±5 % (at 1000 V input)
Input resistance: 1000 MΩ
Maximum allowable input voltage: DC 24 kV (successive), DC 36 kV (30 s), (nominal value)
| Name | Part Number |
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Input cable (general-purpose, with tester probes) |
A01001 |
| Input cable (test probe) | |
| Input cable (test probe 1 m) | CC010001 |
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Alligator clip adapter (for CC010001) |
CC015001 |
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Sheath-type thermocouple (T-type/CC) |
1101-100 |
| Sheath-type thermocouple (K-type/CA) | 1101-130 |
| Panel mount set (2U half) | A02039 |
| Panel mount set (2U half twin) | A02040 |
| Rack mount set (JIS 2U half) | A02263 |
| Rack mount set (JIS 2U half twin) | A02264 |
| Rack mount set (EIA 2U half) | A02463 |
| Rack mount set (EIA 2U half twin) | A02464 |
Download
Functions: (1) Obtains measued values the specified number of times at a specified interval. (2) Sends remote commands.
*Go to the download page.
