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.
