Thomas 4152 Traceable Full-Scale Thermometer User Manual

1. Product Overview

The Thomas 4152 Traceable Full-Scale Thermometer is a precision instrument designed for accurate temperature measurement in various environments. It features a large LCD display for clear readings, a durable stainless-steel probe, and multiple functions including high/low alarms and min/max memory. Each unit is supplied with an individually serial-numbered Traceable certificate, ensuring accuracy and traceability to NIST standards.

Image 1: Thomas 4152 Traceable Full-Scale Thermometer. This image shows the main unit with a round, gray casing and a large LCD display. The display shows '88.5°' and various function buttons like 'HI ALM', 'LO ALM', 'MAX/MIN', 'F/C', 'On/Off', and 'H/T'. A long, slender stainless steel probe with a piercing tip extends from the side, connected by a cable. The display also indicates temperature ranges in Celsius and Fahrenheit.

2. Setup

2.1 Battery Installation

The thermometer is supplied with a 1.5V silver-oxide battery, providing approximately 1.5 years of continuous use. To install or replace the battery, locate the battery compartment on the back of the unit. Use a small screwdriver to open the compartment, insert the new battery with the correct polarity, and securely close the cover.

2.2 Placement Options

The Thomas 4152 thermometer offers versatile placement options:

• Magnetic Back: The unit features a magnetic back, allowing for secure attachment to metal surfaces such as incubators, freezers, or water baths.
• Flip-Open Easel: An integrated flip-open easel allows the thermometer to stand upright on a lab bench or any flat surface for easy viewing.
• Spring Fastener: A spring fastener is included for clipping the unit to the edge of a container or shelf.

3. Operating Instructions

3.1 Power On/Off

Press the On/Off button to power the thermometer on or off.

3.2 Temperature Measurement

Insert the stainless-steel probe into the substance or environment where temperature measurement is required. The piercing tip allows for direct insertion. Readings are updated every second and displayed on the 3/8" LCD readout.

3.3 Switching Temperature Units (°F/°C)

Press the F/C button to toggle between Fahrenheit (°F) and Celsius (°C) temperature scales.

3.4 High/Low Alarms

The thermometer features programmable high and low alarms. Refer to the specific instructions for setting these alarms using the HI ALM and LO ALM buttons. An audible alert will sound when the temperature exceeds or falls below the set limits.

3.5 Minimum/Maximum Memory

Press the MAX/MIN button to view the minimum and maximum temperatures recorded since the last reset. To clear the memory, press and hold the MAX/MIN button.

3.6 Hold Function

Use the H/T button to hold the current temperature reading on the display. Press it again to release and resume live readings.

4. Key Features

• Piercing probe tip for easy insertion.
• Flip-open easel for standing on lab bench.
• Durable stainless-steel probe and 10-foot cable.
• Readings updated every second on a 3/8" LCD readout.
• Magnetic back for secure placement on metal surfaces.
• Switchable temperature ranges: -58 to 500°F (-50 to 300°C).
• Resolution: 0.1° (-20° to 200°), 1° (elsewhere).
• High/low alarm, minimum/maximum memories, and hold function.
• Accuracy: ±1.0°C between -20°C to 100°C.
• Supplied with a Traceable certificate from an ISO 17025 accredited laboratory, traceable to NIST standards.

5. Maintenance

5.1 Cleaning

To clean the thermometer, simply wipe it with a clean, damp cloth. Do not immerse the main unit in water or use abrasive cleaners. Ensure the probe is clean before and after each use, especially when used with different substances.

5.2 Storage

Store the thermometer in a dry environment, away from extreme temperatures and direct sunlight, when not in use.

6. Troubleshooting

7. Specifications

• Model: 4152
• Temperature Range: -58 to 500°F (-50 to 300°C)
• Resolution: 0.1° (-20° to 200°), 1° (elsewhere)
• Accuracy: ±1.0°C between -20°C to 100°C
• Probe Length: 5.75 inches (14.6 cm)
• Probe Diameter: 1/8 inch (0.32 cm)
• Cable Length: 10 feet (3.05 meters)
• Display: 3/8" LCD
• Power Source: 1.5V silver-oxide battery (included)
• Battery Life: Approximately 1.5 years of continuous use
• Unit Dimensions (Thermometer): 2-3/32" diameter x 9/16" depth (approx. 5.3 cm diameter x 1.4 cm depth)
• Material: Metal, Stainless-steel
• Special Features: High Accuracy, Magnetic Back, Flip-Open Easel, Spring Fastener, High/Low Alarms, Min/Max Memory, Hold Function
• Certifications: ISO 17025 accredited, NIST traceable
• Product Care: Wipe Clean

8. Warranty and Support

8.1 Traceable Certificate

Each Thomas 4152 Traceable Full-Scale Thermometer is supplied with an individually serial-numbered Traceable certificate. This certificate is issued from an ISO 17025 calibration laboratory accredited by A2LA and indicates traceability to standards provided by NIST (National Institute of Standards and Technology). This ensures the accuracy and reliability of your instrument.

8.2 Customer Support

For technical assistance, recalibration services, or any inquiries regarding your Thomas 4152 thermometer, please contact Thomas Scientific customer support. Refer to the product packaging or the official Thomas Scientific website for contact information.