1. Introduction
The RIGOL DM858 and DM858E series benchtop digital multimeters are highly cost-effective test tools designed for engineers. These multimeters feature a 5.5-digit resolution, a maximum reading rate of 125 readings/s, and a data logging memory capable of storing up to 500,000 points. With a DCV accuracy of 0.03% (1 year), they offer reliable and precise measurements.
The DM858 series provides 11 measurement functions for various input signals, 5 mathematical operations, and 3 graphical display types, fulfilling the requirements of most experiments and tests. The intuitive 7-inch touch screen ensures a clear view of measurement results and simplifies operation. Standard USB and LAN interfaces, along with a Web Control function, allow for direct instrument control and smoother interaction. Additionally, the inclusion of a Type-C interface enables convenient power charging. Its compact size and support for bracket attachment help save valuable bench space.
2. Product Features
- Max. reading rate: 125 readings/s
- Up to 500,000 points logging memory to record and analyze more data
- 5½-digit reading resolution (120,000 counts)
- True-RMS AC Voltage and AC Current measuring
- Built-in 10 groups of data storage and 10 groups of setup storage
- Strong Math functions, supporting various application protocols
- 7'' color touch screen, displaying dual-measurement results concurrently
- Type-C interface for power charge; compact in size, freeing up your bench space
- Standard USB and LAN interfaces, supporting Web Control
3. Components Overview
3.1 Front Panel
The front panel features the main display, control buttons, navigation keys, and input terminals for various measurements. The 7-inch color touch screen allows for interactive control and clear data visualization.
3.2 Rear Panel
The rear panel provides connectivity options for external devices and power. It includes LAN, USB, and USB-C ports, along with external trigger inputs.
3.3 Side Profile and Dimensions
The DM858 series is designed with a compact and ultra-thin body, making it suitable for various benchtop setups. The bare machine weighs only 1.25kg and has a depth of 80mm.
4. Setup
4.1 Powering the Multimeter
The DM858 series can be powered via its Type-C connector. This allows for flexible power options, including mobile power supplies, making it convenient for on-site testing. A 65W, 74Wh mobile power supply can enable the DM858 to operate for up to 8 hours.
4.2 Mounting Options
The multimeter features a wall-mounted interface on its back panel that complies with the VESA 100x100 standard. This allows for attachment to a desktop stand or other VESA-compatible mounts, helping to optimize workbench space.
4.3 PC Connection
The DM858 series offers standard USB HOST, USB Device, and LAN interfaces for flexible connection to a PC. This enables Web remote control and supports standard SCPI instructions for automated testing environments.
5. Operation
5.1 Basic Measurements
The DM858 series supports 11 types of input signal measurements, providing extensive testing capabilities:
- DC Voltage (DCV)
- DC Current (DCI)
- AC Voltage (ACV)
- AC Current (ACI)
- Two- and Four-wire Resistance
- Frequency and Cycle
- Continuity
- Diode
- Temperature
- Capacitance
The multimeter performs fast measurements with a 5.5-bit resolution and a rate of up to 125 readings per second. The 500,000-point recording memory allows for extensive data logging and analysis.
5.2 Graphical Display and Mathematical Operations
The multimeter supports three graphical display modes for intuitive observation and analysis of test values:
- Trend Charts
- Histograms
- Bar Charts
It also provides various mathematical functions, including statistical operations, limit operations, dB/dBm calculations, and relative operations, to enhance data analysis.
5.3 Sensor Measurements
The DM858 series comes with 10 preset standard sensor configurations and built-in thermocouple cold end compensation. Users can easily configure various types of sensors, such as pressure, flow, and temperature sensors, to expand measurement capabilities.
5.4 Touch Screen Interface
The 7-inch color touch screen display (1024x600 resolution) is divided into main and auxiliary display areas. This allows for simultaneous viewing of readings, instrument status, statistical information, and other content without needing to switch between interfaces. The spacious screen and touch functionality simplify measurement settings and result viewing.
6. Maintenance
6.1 General Care
To ensure the longevity and accuracy of your DM858/DM858E Digital Multimeter, follow these general care guidelines:
- Keep the instrument in a clean, dry environment, away from dust, moisture, and extreme temperatures.
- Avoid dropping or subjecting the multimeter to strong impacts.
- Do not expose the instrument to corrosive chemicals or solvents.
- Ensure proper ventilation around the device during operation.
6.2 Cleaning
To clean the exterior of the multimeter:
- Disconnect the instrument from all power sources and test circuits before cleaning.
- Use a soft, damp cloth with a mild detergent to wipe the casing.
- For the display, use a soft, lint-free cloth specifically designed for electronics screens.
- Do not use abrasive cleaners or solvents that could damage the plastic or screen.
- Ensure the instrument is completely dry before reconnecting it to power or using it.
7. Troubleshooting
This section provides solutions to common issues you might encounter with your DM858/DM858E Digital Multimeter. If you experience a problem not listed here, or if the suggested solutions do not resolve the issue, please contact RIGOL customer support.
7.1 No Power
- Check Power Connection: Ensure the Type-C power cable is securely connected to both the multimeter and a functional power source (e.g., wall adapter, mobile power bank).
- Verify Power Source: Confirm that the power source is providing adequate power (e.g., wall outlet is live, mobile power bank is charged).
- Inspect Cable: Check the Type-C cable for any visible damage. Try using a different, known-good Type-C cable if available.
7.2 Incorrect Readings
- Check Test Leads: Ensure test leads are correctly inserted into the appropriate input terminals for the measurement type.
- Verify Measurement Mode: Confirm that the multimeter is set to the correct measurement function (e.g., DCV for DC voltage, Resistance for resistance).
- Inspect Test Leads: Check test leads for damage or poor connections. Replace if necessary.
- Consider Environmental Factors: Extreme temperatures or strong electromagnetic interference can affect readings. Operate the multimeter in a stable environment.
7.3 Touch Screen Unresponsive
- Restart the Device: Power off the multimeter, wait a few seconds, and then power it back on.
- Clean Screen: Ensure the screen is clean and free of debris or moisture that might interfere with touch input.
- Firmware Update: Check the RIGOL website for any available firmware updates that might address touch screen issues.
8. Specifications
| Feature | Specification |
|---|---|
| Resolution | 5.5-digit (120,000 counts) |
| Max. Reading Rate | 125 readings/s |
| Data Logging Memory | 500,000 points |
| DCV Accuracy (1 year) | 0.03% |
| Operating Mode | Auto Range |
| Display | 7-inch Color Touch Screen (1024x600 resolution) |
| Interfaces | USB HOST, USB Device, LAN, Type-C (for power) |
| DC Voltage Input | 12V |
| AC Voltage Input | 100-240VAC |
| Dimensions (Bare Machine) | Depth: 80mm, Weight: 1.25kg |
| Battery Included | No |
| Certification | CE |
| DIY Supplies | Electrical |
9. User Tips
- Maximize Data Logging: Utilize the 500,000-point logging memory for long-term monitoring or capturing transient events. This is especially useful for analyzing trends over time.
- Leverage Graphical Displays: The trend charts, histograms, and bar charts can provide quick visual insights into your measurements. Use them to identify patterns, anomalies, or distributions in your data more easily than raw numbers.
- Portable Power: For field work or areas without easy access to power outlets, remember that the Type-C port allows powering the multimeter with a compatible mobile power supply, extending its usability.
- Web Control for Automation: If you're performing repetitive tests or integrating the multimeter into an automated system, explore the Web Control function via the LAN interface and SCPI commands for efficient remote operation.
10. Warranty and Support
For warranty information, technical support, or service inquiries regarding your RIGOL DM858/DM858E Digital Multimeter, please refer to the official RIGOL website or contact your local RIGOL distributor. Ensure you have your product model and serial number available when seeking support.
