PSJ Digital Logging Recorder & Acquisition Software
PSJ Digital Logging Recorder & Acquisition Software
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Basic Information
| Model | Dimensions (mm) | Weight (kg) | Working Temp. | Rel. Humidity | Power |
| PSJ-2A | 40×370×130 | 5.0 | -25℃ ~ +45℃ | ≤80% (at +45℃) | 300W |
| PSJ-4 | 60×180×145 | 3.0 | -25℃ ~ +45℃ | ≤80% (at +45℃) | 200W |
Description
PSJ-2A Digital Acquisition Recorder
The PSJ-2A Digital Acquisition Recorder supplies power and signal collection for all downhole equipment. It can directly control a printer to plot curves without a laptop, storing the acquired data in internal memory for playback. During playback, curves can be displayed from shallow to deep or deep to shallow at multiple scale ratios. Upon completion, data is read via USB into a laptop for indoor playback and processing. Alternatively, a laptop can be used on-site for direct acquisition, observation, and curve printing, with processed data used to print final deliverables.
PSJ-4 Digital Acquisition Recorder
The PSJ-4 Digital Acquisition Recorder is designed for compactness and portability, meeting the needs of relatively single-task logging operations. Compared with the PSJ-2A, it omits compatibility with pure electrode probe strings, pulse-type probes, and legacy combined probe types; removes real-time curve printing and full-waveform recording. It communicates only with probes compliant with the Zhongdi Yingjie digital probe communication protocol.
Key features: compact, lightweight and portable; Chinese character display with easy operation; dedicated push-button switch; selectable constant-voltage / constant-current power supply; depth positive/negative correction; compatible with different pulse-count encoders; independent self-test signal generator; field-programmable data calculation; 10,000 m logging data storage capacity (theoretical 20 years); USB interface.
VPSJ-2 Data Acquisition Software
The VPSJ-2 logging system acquisition software is programmed in Visual C++ and offers stable data transmission, a user-friendly interface, and simple operation. It conveniently handles data reception, curve display, data playback, and printing. The acquired raw data can be imported into interpretation systems from various manufacturers.
Main functions: (1) Real-time acquisition, storage, and printing of logging data with on-screen curve and data display; (2) Opening existing files for playback with on-screen curve/data display and playback printing; (3) One-time reception of logging data from the acquisition panel with on-screen display; (4) Connection test between acquisition system and computer; (5) Engineering-style management of multiple data files; (6) Integrated full-waveform data acquisition; (7) Data export functionality.
Specification
| Parameter | PSJ-2A | PSJ-4 |
| DC Constant-Current Power | 10, 20, 40, 60, 80 mA; max. voltage 300V | 10, 20, 40, 60, 80 mA; max. voltage 200V |
| DC Constant-Voltage Power | 0–200V; max. current 150 mA | 36, 72, 100, 120, 200V; max. current 120 mA |
| Push-Power Constant Voltage | 0–200V adjustable | 100V |
| Per-Metre Correction Range | 12.7 mm ~ 0 mm | -12.7 mm ~ +12.7 mm |
| Communication Rate | Normal: 9600 bps; Full-waveform: 57600 bps | Field: 9600 bps; Indoor export: 10 m/s |
| Data Storage | 6000 m (at 5 cm sampling) | 10000 m (at 5 cm sampling); theoretical 20 years |
| Digital Signal Channels | 0–6 channels; values 0–4095 | 1–7 channels; values 0–4095 |
| Input Signal | 8V–10V (adjustable if exceeded) | 8V–10V (adjustable if exceeded) |
| Optical Encoder | Field-settable, default 500 pulses/rev | Field-settable, default 500 pulses/rev |
| Sampling Interval | 1, 2, 5, 10, 20 cm | 1, 2, 5, 10, 20 cm (default 5 cm) |
| Logging Speed | ≤36 m/min (at 5 cm sampling) | ≤36 m/min (at 5 cm sampling) |
| Data Range | Each channel: 0 ~ 65535 | Each channel: 0 ~ 65535 |
| Self-Test Signal | Simulated encoder: up / down | Simulated encoder: up/down; speed adjustable |
| Analog Signal Channels | 0–3 channels; voltage 0V–5V | 1–4 channels; voltage 0V–5V |
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