Hydraulic Oil Filtration Tester FDH-5901 by CSFriend
| Brand | CSFriend |
|---|---|
| Origin | Hunan, China |
| Model | FDH-5901 |
| Cooling Method | Compressor-based refrigeration |
| Heating Method | Electric heating tube |
| Temperature Control | Digital PID controller |
| Temperature Range | 0–60 °C |
| Timing System | Digital timer |
| Power Supply | AC 220 V |
Overview
The CSFriend FDH-5901 Hydraulic Oil Filtration Tester is an engineered benchtop instrument designed to evaluate the filterability of hydraulic fluids under standardized thermal conditions. It operates on the principle of measuring the time required for a specified volume of oil to pass through a standardized microporous membrane (typically 0.8 µm or 1.2 µm pore size) at controlled temperatures—commonly 23 °C and 74 °C per ASTM D2272 and ISO 13357-1 protocols. The system integrates precise thermal regulation with automated timing to deliver repeatable, operator-independent filtration performance data. Its design supports routine quality control in lubricant manufacturing, OEM fluid specification validation, and in-service oil condition monitoring where particulate-induced filter clogging poses operational risk.
Key Features
- Integrated monolithic chassis minimizes mechanical vibration and thermal cross-talk between heating and cooling subsystems, enhancing measurement stability.
- Dual-mode thermal management: high-efficiency imported compressor for rapid cooling down to 0 °C, paired with calibrated electric heating tubes for uniform temperature ramping up to 60 °C.
- Digital PID temperature controller with ±0.3 °C accuracy across the full 0–60 °C range; real-time setpoint tracking and auto-tuning capability ensure minimal overshoot and drift.
- Independent digital timer with audible alarm output upon completion—programmable for durations up to 99 minutes 59 seconds, compliant with ASTM D2272 timing requirements.
- Front-panel interface with LED display for simultaneous readout of actual temperature, setpoint, and elapsed time—no external software or PC connection required for basic operation.
Sample Compatibility & Compliance
The FDH-5901 accommodates standard 100 mL test samples of mineral-based, synthetic, and biodegradable hydraulic oils—including HLP, HVLP, HFDU, and HEES formulations. It supports testing with certified glass-fiber or mixed-cellulose ester (MCE) membranes meeting ASTM E128 and ISO 4003 specifications. While the instrument itself does not carry CE or UL certification, its electrical architecture complies with IEC 61010-1 safety requirements for laboratory equipment. Test procedures executed on this platform align with ASTM D2272 (Standard Test Method for Filterability of Petroleum Oils), ISO 13357-1 (Petroleum products — Determination of filterability — Part 1: Cold filter plugging point method), and JIS K 2284. Data generated may be incorporated into GLP-compliant reporting workflows when paired with documented SOPs and manual audit trails.
Software & Data Management
The FDH-5901 operates as a standalone hardware unit without embedded firmware or network connectivity. All operational parameters—including temperature setpoint, hold duration, and timer start—are configured manually via front-panel controls. Result recording is performed externally using laboratory notebooks or LIMS-integrated spreadsheets. For laboratories requiring electronic record retention, users may pair the device with validated third-party data acquisition systems that capture timer output signals (TTL or relay closure) and temperature analog outputs (0–10 V or 4–20 mA optional). No proprietary software is supplied; no FDA 21 CFR Part 11 compliance features are included out-of-the-box.
Applications
- Quality assurance of new hydraulic oils prior to shipment—verifying conformity to OEM filterability limits (e.g., Caterpillar CEC L-92-B, Bosch Rexroth D-11).
- Assessment of oxidation-induced sludge formation in service-aged oils, correlating increased filtration time with viscosity increase and acid number rise.
- Screening additive package stability during thermal aging studies, particularly anti-wear (ZDDP) and dispersant degradation pathways affecting particle agglomeration.
- Validation of filter media compatibility in hydraulic system redesign projects—quantifying differential pressure buildup rates across candidate membranes.
- Teaching laboratories demonstrating ASTM-standardized fluid cleanliness metrics in mechanical engineering and tribology curricula.
FAQ
What standards does the FDH-5901 support?
It enables execution of ASTM D2272, ISO 13357-1, and JIS K 2284 filtration time tests through precise temperature control and timed flow measurement.
Is the instrument suitable for testing water-glycol or phosphate-ester fluids?
Yes—provided compatible membrane materials (e.g., PTFE-backed MCE) are selected to prevent chemical degradation during testing.
Does the FDH-5901 include a built-in pressure regulator or vacuum source?
No—external vacuum pumps or regulated nitrogen supply lines must be connected per test method requirements (typically –50 kPa to –80 kPa differential pressure).
Can temperature calibration be performed in-house?
Yes—using traceable NIST-certified RTD probes inserted into the sample chamber’s thermal well; calibration intervals should follow internal QA policy or ISO/IEC 17025 guidelines.
What maintenance is required for the compressor system?
Annual inspection of condenser coils and refrigerant charge verification by authorized HVAC technicians is recommended; no user-serviceable components exist within the sealed refrigeration loop.
