DZD-8 Multi-function Full Wave DC Electron Meter
Environmental site assessments demand defensible data. The DZD-8 Multi-function Full Wave DC Electron Meter delivers repeatable resistivity and IP measurements that stand up to regulatory review. Whether you are mapping a contaminant plume, locating a landfill boundary, or imaging a saltwater intrusion, this instrument provides the evidence you need.
Full Waveform Recording Technology
Traditional meters average signals, hiding transient noise from nearby pumps, traffic, or telluric currents. The DZD-8 records 1KHz waveforms of both current and potential. You can visually inspect each measurement. If noise is present, you see it. You can also recalculate polarizability using different delay times - a critical feature when the secondary field from clay or organic contamination is weak.
Accuracy Specifications
Voltage resolution 5nV, accuracy ≤0.1% for signals >1mV. Current resolution 10nA. Apparent polarizability error ≤±0.2%. These specifications exceed typical environmental requirements, providing verifiable data quality for regulatory compliance.
Measurement Parameters
- Resistivity distinguishes clean sand/gravel (high) from clay or leachate (low)
- Polarizability (IP) responds to clay minerals, organic matter, and some metal contaminants
- Self-potential detects groundwater flow and redox zones
- Metal factor and attenuation provide additional discrimination
All parameters are measured from a single measurement sequence.
Field Workflow for Site Assessment
- Lay out a 2D ERT line across the suspected plume using centralized or distributed cables
- Press "Res" to check ground resistance and fix any poor electrodes
- Create a new project: name it, select 2D ERT, set electrode spacing and layout
- Press "Measure" - the DZD-8 automatically sequences through electrode pairs
- The screen builds a pseudo-section in real time
- After survey, press "7" to check data quality and retest any questionable points
- Transfer data via USB to the included software
Advanced Survey Capabilities
Rolling measurement extends profiles without moving all electrodes. After completing one section, the system prompts you to move a subset of cables, enabling efficient surveys of hundreds of meters with a single cable set - ideal for long pipelines or shoreline assessments.
3D ERT for detailed source zone imaging supports S, U, W, or Wang cable layouts with up to 60 or more electrodes depending on configuration. The 3D preprocessor allows data editing, bad electrode deletion, and export to inversion software for final 3D modeling in GIS or CAD.
Data Security and Chain of Custody
All raw waveforms are saved on the internal SD card (16G to 64G optional). USB transfer is simple - the instrument appears as a drive. No proprietary formats requiring expensive software. The provided analysis software exports to ASCII, Res2Dinv, Res3Dinv, and Surfer formats, maintaining raw files as audit trail.
Rugged Field Performance
IP67 waterproof - can be hosed off after dirty surveys. Operating temperature range -20°C to +60°C. The 6.4 inch high-brightness LCD remains readable in direct sunlight. The enclosure withstands vibration from trucks and generators.
Power Management
Internal 16.8V 12.5Ah battery provides 20 hours of operation. For multi-day assessments, connect a 12V external battery via the charge port. The instrument displays remaining charge as a percentage with orange screen warning below 15%.
Transmitter Performance
Maximum 1400V and 6A, 7500W output. In urban settings with low ground resistance, only 50-100V may be needed. For resistive dry sand or gravel, higher voltage pushes current through. Pulse width adjustable from 1 to 64 seconds - longer pulses improve signal-to-noise for deep or noisy sites.
Field Troubleshooting Guide
- High VP error: Usually indicates low voltage (<1mV). Increase MN spacing or use longer pulse
- Current too low: Dry ground conditions. Water the A/B electrodes or add multiple stakes per pole
- Current output protection: AB short circuit or very low ground resistance. Reduce voltage
- Erratic readings: Look for nearby power lines or cathodic protection systems. Move line perpendicular to interference source
The manual includes a four-resistor test (1kΩ, 100Ω, 1kΩ in series) to verify instrument channels before each major project.
Software Capabilities
The "Multifunctional DC analysis software" provides:
- Project creation with custom pole tables
- Coordinate modification (start coordinates, point spacing)
- Polarizability secondary extraction - change integration windows after field work
- Data export in multiple formats
- File merging for combined profiles
No subscription fees - purchase once, use forever.
Technical Specifications
| Parameter |
DZD-8 Specification |
| Receiver |
Full waveform record of current and potential |
| Voltage range |
±40V, 32-bit A/D |
| Voltage resolution |
5nV |
| Voltage accuracy |
>1mV: ≤0.1%; ≤1mV: ±1uV |
| Apparent polarizability accuracy |
Fs error ≤±0.2% |
| Current range |
0 - 6000 mA, 32-bit A/D |
| Current resolution |
10nA |
| Current accuracy |
≥10mA: ±0.1%; <10mA: ±2uA |
| Sampling frequency |
1KHz |
| Input impedance |
≥50MΩ |
| 50Hz interference suppression |
>120dB |
| SP compensation |
±40V full range real-time auto digital tracking |
| Max supply voltage |
1400V |
| Max supply current |
6A |
| Max output power |
7500W |
| Power pulse width |
1-64s, duty cycle 1:1 |
| Operating system |
Embedded Linux real-time |
| Display |
6.4 inch, 24-bit color, 1200cd/m2 brightness |
| Data storage |
16G-64G optional, USB2.0 transfer |
| Internal battery |
16.8V 12.5Ah, works 20 hours |
| External battery |
12V |
| Waterproof |
IP67 |
| Working temperature |
-20 to +60°C, 95% RH |
| Size |
300 x 225 x 132 mm |
| Weight |
5.6 kg |
Package Contents
In the box: Main unit, USB cable, high voltage input cable, external battery cable, charger, non-polarized electrodes (1 pair), stainless steel electrodes (10 pieces), USB drive, manual, certification, warranty card. Everything needed for environmental geophysics applications.
Professional Benefits
For environmental consultants, the DZD-8 reduces risk by providing verifiable full waveform data, high accuracy, rugged durability, and transparent software. Deliver reports with confidence and regulatory compliance.
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