O.n 23.8757.15 User Manual

The O.n 23.8757.15 is a precision measurement and calibration instrument designed for professional laboratory and industrial applications. It features high-resolution digital display, multi-parameter sensing capabilities, data logging, USB connectivity for PC interface, rechargeable battery operation, and robust construction for reliable performance in various environments. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-resolution LCD display, Multi-function control panel, Sensor input ports, USB connectivity port, Battery compartment, Calibration adjustment points.

Installation

Unpack and inspect contents. Place on stable, level surface.

1. Install battery: Open battery compartment, insert rechargeable battery following polarity markings.
2. Connect sensors: Attach appropriate measurement probes to sensor input ports.
3. Connect to PC (optional): Use USB cable to connect to computer for data transfer.
4. Power on: Press POWER button to activate instrument.

WARNING! Handle with care to avoid damage to sensitive components. Ensure all connections are secure before powering on.

First-Time Setup

Power on instrument; follow initialization sequence.

1. Set language: Navigate to SYSTEM menu, select preferred language (default: ENGLISH).
2. Configure measurement units: Select appropriate units for each parameter in SETUP menu.
3. Calibrate sensors: Perform initial calibration using reference standards.
4. Set data logging parameters: Configure sampling rate and storage settings.

CAUTION! Perform initial calibration in controlled environment for accurate measurements.

Specifications

• Model: O.n 23.8757.15
• Display: 3.5-inch backlit LCD with 320x240 resolution
• Measurement Range: Configurable based on sensor type
• Accuracy: ±0.1% of reading ±1 digit
• Connectivity: USB 2.0, Bluetooth (optional)
• Data Storage: 100,000 data points internal memory
• Power Source: Rechargeable Li-ion battery (7.4V, 2600mAh)
• Operating Temperature: 0°C to 50°C (32°F to 122°F)
• Dimensions: 150 x 85 x 45 mm (5.9 x 3.3 x 1.8 inches)
• Weight: 350g (0.77 lb) including battery

Controls and Settings

Access menu system via MENU button. Front Panel: POWER, MODE, ENTER, NAVIGATION arrows, BACK.

Remote Interface: Available via PC software for extended control options.

Measurement Settings: Range selection, averaging time, filter settings, alarm thresholds. System Settings: Language, display contrast, backlight timeout, power save mode. Data Settings: Logging interval, storage location, export format. Calibration: Zero adjustment, span calibration, sensor compensation.

Connecting Devices

Sensors: Connect to appropriate input ports. PC: USB connection for data transfer and remote control.

1. Turn off instrument before connecting/disconnecting sensors.
2. Match sensor type to correct input port (consult sensor documentation).
3. Secure connections to prevent signal interference.
4. Select input source via MODE menu when multiple sensors connected.

Tip: Use shielded cables for sensitive measurements to reduce noise interference.

Measurement Procedures

Supports continuous monitoring, spot measurements, and timed data logging.

1. Select measurement mode: Press MODE button to choose parameter type.
2. Connect sensor: Ensure proper connection to instrument.
3. Initiate measurement: Press ENTER to begin reading.
4. Record data: Use DATA LOG button to store measurements.
5. View history: Navigate to DATA menu to review stored measurements.
6. Export data: Connect to PC and use export function in software.
7. Calibrate regularly: Perform calibration as specified in maintenance schedule.
8. Adjust settings: Modify parameters as needed for specific applications.

WARNING! Do not exceed specified measurement ranges. Allow instrument to stabilize in new environment before critical measurements.

Data Management

Data Logging: Configure in DATA menu; set interval, duration, and storage location. Data Export: Transfer to PC via USB; supports CSV, Excel, and proprietary formats. Data Security: Password protection available for sensitive measurements (default password 0000).

Care & Maintenance

Power off before cleaning. Use soft, dry cloth for display and casing. Clean sensor connections with appropriate contact cleaner. Store in protective case when not in use.

CAUTION! Do not use abrasive cleaners or solvents. Keep away from extreme temperatures and humidity.

Regulatory Information

CE Certified: Complies with European Union safety standards. FCC Part 15: Class A digital device; may cause interference in residential areas. RoHS Compliant: Contains no hazardous substances above permitted levels. Copyright © 2025 O.n Instruments; all rights reserved. For technical support, visit www.on-instruments.com or contact +1-800-555-2387.

Troubleshooting

Reset: Menu > System > Factory Reset (note: erases all data and settings).

Service: +1-800-555-2387; www.on-instruments.com/support