1. Introduction
This user manual provides comprehensive instructions for the setup, operation, and maintenance of your labForce 4-Channel Alarm Timer. Designed for precision and reliability, this timer is ideal for repetitive testing and various laboratory or household applications requiring accurate timekeeping across multiple channels. Please read this manual thoroughly before using the device to ensure optimal performance and longevity.
2. Product Overview
The labForce 4-Channel Alarm Timer (Model 9371W52) is a versatile timing device featuring four independent channels, a high-decibel alarm, and an easy-to-read display. It comes with a NIST Traceable certificate, ensuring accuracy and reliability for critical applications.

Image 1: Front view of the labForce 4-Channel Alarm Timer, highlighting the digital display and control buttons.
Key Features:
- Four Independent Channels: Allows simultaneous timing of up to four different events.
- High-Decibel Alarm: Ensures alerts are heard even in noisy environments.
- NIST Traceable Certificate: Provides assurance of accuracy and calibration.
- Easy-to-Read Display: Clear digits for quick and convenient viewing.
- Compact Design: Portable and suitable for various settings.
Components:
- Digital Display: Shows time for selected channel and clock.
- T1, T2, T3, T4 Buttons: Selects the respective timer channel.
- CLOCK Button: Displays the current time or allows setting the clock.
- H, M, S Buttons: Used to set Hours, Minutes, and Seconds for timers.
- START/STOP Button: Initiates or pauses the selected timer.
- C (Clear) Button: Resets the selected timer to zero.
- Battery Compartment: Located on the back for AAA battery installation.
3. Setup
Battery Installation:
- Locate the battery compartment cover on the back of the timer.
- Slide the cover off in the direction indicated by the arrow.
- Insert one (1) AAA battery, ensuring the correct polarity (+/-) as marked inside the compartment. A battery is included with your timer.
- Replace the battery compartment cover, sliding it firmly until it clicks into place.
The timer display should now illuminate, indicating successful battery installation.
4. Operating Instructions
Setting the Clock:
- Press the CLOCK button to display the current time.
- Press and hold the CLOCK button for approximately 3 seconds until the hour digits begin to flash.
- Use the H (Hours), M (Minutes), and S (Seconds) buttons to adjust the time.
- Press the CLOCK button again to confirm the setting and exit clock setting mode.
Setting Individual Timers (T1-T4):
Each of the four channels (T1, T2, T3, T4) can be set independently for countdown timing.
- Select the desired timer channel by pressing its corresponding button (T1, T2, T3, or T4). The display will show the selected channel's current setting.
- Use the H (Hours), M (Minutes), and S (Seconds) buttons to set the desired countdown time. Pressing a button repeatedly will cycle through the digits.
- To clear a timer setting, press the C (Clear) button while the timer is selected and stopped.
Starting and Stopping Timers:
- After setting the desired time for a channel, press the START/STOP button to begin the countdown.
- To pause a running timer, press the START/STOP button again. The timer will hold its current value.
- To resume a paused timer, press the START/STOP button once more.
Alarm Function:
When a timer counts down to zero, the high-decibel alarm will sound. The alarm will continue to sound until the START/STOP button is pressed to silence it. The display will then show the elapsed time since the alarm triggered, indicating how long it has been past zero.
5. Maintenance
Cleaning:
To clean the timer, wipe its surface with a soft, damp cloth. Do not use abrasive cleaners or immerse the unit in water. Ensure the timer is dry before storage or continued use.
Battery Replacement:
When the display dims or the timer functions become erratic, it is time to replace the AAA battery. Follow the battery installation steps outlined in the "Setup" section. Dispose of used batteries responsibly according to local regulations.
Storage:
Store the timer in a cool, dry place away from direct sunlight and extreme temperatures. If storing for extended periods, it is recommended to remove the battery to prevent leakage.
6. Troubleshooting
- Timer not turning on or display is dim:
Check battery installation. Ensure the AAA battery is inserted with correct polarity. Replace with a fresh battery if necessary.
- Alarm is not sounding:
Verify that the timer has counted down to zero. Ensure there are no obstructions blocking the speaker. If the issue persists, replace the battery.
- Timer not responding to button presses:
Remove and reinsert the battery to perform a soft reset. If the problem continues, the unit may require service.
- Accuracy concerns:
Your timer comes with a NIST Traceable certificate, ensuring its accuracy at the time of manufacture. For re-calibration services or further accuracy inquiries, please contact Thomas Scientific support.
7. Specifications
| Attribute | Detail |
|---|---|
| Model Number | 9371W52 |
| Brand | THOMAS SCIENTIFIC |
| Number of Channels | 4 |
| Power Source | 1 AAA Battery (included) |
| Screen Size | 0.75 Inches |
| Color | Silver |
| Package Dimensions | 3.27 x 2.83 x 1.14 inches |
| Weight | 2.4 ounces |
| Manufacturer | Thomas Scientific |
| Date First Available | November 5, 2012 |
8. Warranty and Support
For product support, technical assistance, or inquiries regarding your NIST Traceable certificate, please contact Thomas Scientific directly. Information regarding specific warranty terms may be available through your point of purchase or on the official Thomas Scientific website.
You can visit the official Thomas Scientific store for more information and products: Thomas Scientific Store





