JENCO 6230M Portable High-Precision pH/ORP/Temperature Meter

Overview

The JENCO 6230M is a field-deployable, high-accuracy benchtop-grade pH/ORP/temperature meter engineered for rigorous industrial process monitoring, environmental sampling, and quality control laboratories. It operates on the principle of potentiometric measurement: pH is determined via the Nernst equation using a glass electrode system, while ORP (oxidation-reduction potential) is measured as the open-circuit voltage between a noble metal indicator electrode (typically platinum or gold) and a stable reference electrode (e.g., Ag/AgCl in saturated KCl). Temperature is acquired via an integrated Pt1000 or thermistor-based probe, enabling real-time compensation across the full operational range. Designed for traceable metrology, the instrument meets fundamental requirements for ISO/IEC 17025-compliant calibration workflows and supports GLP documentation protocols through its timestamped data logging and error-trace functionality.

Key Features

• Triple-parameter measurement capability: simultaneous, independent acquisition of pH, ORP, and temperature with full cross-parameter correlation
• High-fidelity analog front-end with low-drift amplifier architecture ensuring ±0.01 pH accuracy over extended operation cycles
• Auto 3-point pH calibration using standard buffers (pH 4.01, 7.00, 10.01) with automatic slope and offset validation
• Dual-mode temperature compensation: automatic (using built-in sensor) or manual entry for non-contact probe applications
• 40-entry internal memory with time/date stamping—each record includes pH, mV, °C, calibration status, and operator ID field
• Comprehensive diagnostic suite: six distinct error codes (e.g., electrode open circuit, buffer recognition failure, temperature sensor fault) displayed with explanatory icons
• RS-232C serial interface compliant with EIA/TIA-232-F specifications for direct connection to PCs, LIMS, or SCADA systems
• AC/DC dual-power architecture: operates from 100–240 VAC adapter or optional rechargeable Li-ion battery pack (sold separately), supporting >12 hours continuous field use

Sample Compatibility & Compliance

The 6230M is compatible with all standard BNC-connectable pH and ORP electrodes—including double-junction, gel-filled, and refillable liquid-junction types—as well as external temperature probes meeting DIN EN 60751 Class B tolerance. Its wide pH range (–2.00 to 16.00) accommodates aggressive process streams (e.g., caustic soda lyes, concentrated acid baths) and biological media (e.g., fermentation broths, wastewater effluents). The unit conforms to IEC 61010-1:2010 for electrical safety in laboratory equipment and carries CE marking for EMC compliance (EN 61326-1). While not intrinsically safe, it is rated IP65 for dust and water jet resistance when used with appropriate electrode housings—making it suitable for outdoor or semi-industrial environments under controlled conditions.

Software & Data Management

Data export is supported via ASCII text format over RS-232C at 9600 baud, 8N1 configuration. JENCO-provided PC software (Windows-compatible) enables batch download, CSV export, calibration report generation, and trend visualization. All stored measurements include embedded metadata: timestamp (YYYY-MM-DD HH:MM:SS), electrode ID (user-entered), calibration history flag, and ambient temperature at time of reading. Audit trail integrity is preserved through write-once memory allocation—records cannot be edited or deleted without full device reset, satisfying basic FDA 21 CFR Part 11 alignment for non-GMP environments. Optional firmware updates maintain compatibility with evolving electrode chemistries and regulatory reporting templates.

Applications

• Wastewater treatment plant monitoring: influent/effluent pH and redox profiling for nitrification/denitrification control
• Pharmaceutical water system validation (PW, WFI): routine conductivity-pH correlation checks per USP
• Food & beverage QC: titratable acidity verification in dairy, juice, and fermented products
• Electroplating bath management: real-time ORP tracking for chromic acid and nickel sulfate electrolytes
• Academic research labs: kinetic studies requiring synchronized pH/mV/temperature acquisition during reaction monitoring
• Environmental field surveys: soil leachate and surface water analysis under ASTM D1293 and ISO 10523 protocols

FAQ

Does the 6230M support automatic electrode diagnostics?
Yes—it continuously monitors electrode impedance, asymmetry potential, and response time during calibration and measurement, triggering specific error codes if deviations exceed preset thresholds.
Can the instrument store calibration data separately from sample readings?
No—calibration events are embedded within the same 40-record memory array but are tagged with “CAL” prefix and full buffer identification for traceability.
Is the RS-232 interface optically isolated?
No—galvanic isolation is not implemented; users deploying in electrically noisy industrial settings should employ shielded cables and ground-loop mitigation strategies.
What is the recommended recalibration interval under continuous use?
JENCO recommends daily verification with one-point check buffer (pH 7.00) and full 3-point calibration every 8–12 hours in high-precision applications or after electrode cleaning.
Does the device comply with GLP requirements for electronic records?
It supports core GLP principles (audit trail, operator identification, time-stamping), though full 21 CFR Part 11 compliance requires supplementary IT infrastructure (e.g., validated PC software, electronic signatures, secure network storage).