1. Fampidirana
The Extech Instruments HW30 HeatWatch is a multi-function stopwatch designed to provide essential environmental data alongside precise timing capabilities. This device displays digital up/down timer functions, current temperature, humidity, and calculates the heat index, which indicates how hot it feels when humidity is combined with the actual temperature. It is an ideal tool for monitoring conditions in various environments, particularly those with hot weather. Additional features include a 12/24-hour clock, a standard stopwatch, 30 lap/split memory, and a programmable alarm.
2. Endri-javatra fototra
- Multi-function stopwatch with digital display.
- Integrated up/down timer.
- Real-time temperature display.
- Real-time humidity display.
- Heat Index calculation for perceived temperature.
- 12/24-hour clock display.
- Stopwatch function with 30 lap/split memory.
- Asa fanairana azo fandaharana.
3. Ny votoatin'ny fonosana
Hamarino fa misy ny entana rehetra ary ao anatin'ny toe-javatra tsara rehefa manokatra ny fonosana:
- HW30 HeatWatch Humidity and Temperature Stopwatch
- Lanyard
- 1 x Lithium Metal Battery (installed or separate)
- Torolàlana miasa (ity boky ity)
4. Vokatra mihoatraview
The HW30 HeatWatch features a robust design with clearly labeled buttons for easy operation and a large LCD for clear readings.

Sary 4.1: Eo anoloana view of the Extech HW30 HeatWatch, showing the display and control buttons.

Sary 4.2: antsipirihany view of the HW30 display, indicating humidity (50%), temperature (86°F), and heat index (88°).
4.1. Fanaraha-maso sy fampisehoana
- Bokotra START/STOP: Initiates and pauses timing functions.
- Bokotra MODE: Cycles through different operating modes (Time, Stopwatch, Humidity/Temperature/Heat Index, Alarm).
- LAP/SPLIT/RESET Button: Records lap/split times or resets the stopwatch.
- bokotra RECALL: Accesses stored lap/split memory.
- LCD Display: Shows time, measurements, and function indicators.
5. Fametrahana
5.1. Fametrahana bateria
The HW30 HeatWatch requires one Lithium Metal battery for operation. The battery is typically included with the device.
- Tadiavo ny fonon'ny efitrefitra bateria ao ambadiky ny fitaovana.
- Use a small screwdriver or coin to open the battery compartment.
- Insert the Lithium Metal battery, ensuring correct polarity (+/-) as indicated inside the compartment.
- Soloy ny fonon'ny efitry ny bateria ary arovy izany.
Fanamarihana: Ario am-pahamendrehana ny bateria efa nampiasaina araka ny fitsipika eo an-toerana.
6. Torolàlana miasa
This section details the various functions and modes of the HW30 HeatWatch.

Figure 6.1: The HW30 HeatWatch being held, demonstrating its portable and ergonomic design for active use.
6.1. Basic Operation and Mode Selection
Tsindrio ny MODE button to cycle through the following display modes:
- Fomban'ny fotoana: Displays the current time (12 or 24-hour format).
- Fomba famantaranandro: For timing events, including lap/split functions.
- Humidity/Temperature/Heat Index Mode: Shows environmental readings.
- Fomba fanairana: For setting and activating the programmable alarm.
6.2. Fametrahana ny ora sy ny daty
- Ao amin'ny Time Mode, tsindrio ary mihazona ny MODE button until the time digits begin to flash.
- Ampiasao ny START/STOP bokotra hanitsiana ny isa mirehitra (ora, minitra, segondra).
- Tsindrio ny LAP/SPLIT/RESET button to move to the next digit or setting (e.g., 12/24-hour format, date).
- Rehefa voarindra daholo ny fikandrana rehetra dia tsindrio ny MODE button to exit setup.
6.3. Using the Stopwatch Functions
- Switch to Stopwatch Mode using the MODE bokotra.
- mpanao gazety START/STOP manomboka ny fotoana.
- mpanao gazety LAP/SPLIT/RESET to record a lap or split time. The display will momentarily show the recorded time while the stopwatch continues to run in the background.
- mpanao gazety START/STOP hampiato indray ny famantaranandro.
- Raha hanohy indray, tsindrio START/STOP. Mba hamerenana, tsindrio LAP/SPLIT/RESET raha miato ny famantaranandro.
- To recall stored lap/split times, press the mahatsiaro button in Stopwatch Mode. Use LAP/SPLIT/RESET to scroll through memory.
6.4. Humidity, Temperature, and Heat Index Measurement
The HW30 automatically measures and displays humidity, temperature, and calculates the heat index in the dedicated mode.
- Switch to Humidity/Temperature/Heat Index Mode using the MODE bokotra.
- The display will show the current humidity percentage, temperature (in °F or °C), and the calculated heat index.
- Allow a few minutes for the sensors to stabilize and provide accurate readings, especially when moving the device between environments with different conditions.
6.5. Fametrahana ny fanairana
- Switch to Alarm Mode using the MODE bokotra.
- Tsindrio ary hazòny ny MODE button until the alarm time digits begin to flash.
- Ampiasao ny START/STOP button to adjust the flashing digit (hours, minutes).
- Tsindrio ny LAP/SPLIT/RESET bokotra hifindrana eo amin'ny ora sy minitra.
- Once the desired alarm time is set, press the MODE bokotra hanamafisana.
- Mba hampavitrika na hanafoana ny fanairana, tsindrio ny START/STOP button in Alarm Mode. An alarm icon will appear on the display when activated.
7. Fikojakojana
7.1. Fanadiovana
- Sasao malefaka ilay singa, damp lamba. Aza mampiasa mpanadio abrasive na solvents.
- Ensure the device is dry before storage or further use.
7.2. fitahirizana
- Store the HW30 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.
7.3. Fanoloana bateria
Replace the battery when the display becomes dim or the unit ceases to function. Refer to Section 5.1 for battery installation instructions.
8. Famahana olana
This section addresses common issues you might encounter with your HW30 HeatWatch.
| OLANA | Antony mety hitranga | vahaolana |
|---|---|---|
| Tsy misy fampisehoana na fampisehoana manjavozavo | Batterie ambany na maty; Fametrahana batterie tsy mety. | Replace the battery; Ensure battery is installed with correct polarity. |
| Famakiana mari-pana/hamandoana tsy marina | Sensors not stabilized; Extreme environmental conditions. | Allow several minutes for the unit to acclimate to the environment; Ensure sensors are not obstructed. |
| Stopwatch not responding | Unit in incorrect mode; Buttons stuck. | Cycle through modes to Stopwatch Mode; Check for any physical obstructions on buttons. |
| Heat Index reading seems off | Heat index calculation is based on specific algorithms and can vary slightly; Sensor acclimation. | Ensure temperature and humidity readings are stable; Understand that heat index is a calculated value. |
9. Famaritana
Technical specifications for the Extech HW30 HeatWatch Humidity and Temperature Stopwatch:
| famaritana | sarobidy |
|---|---|
| Laharana modely | HW30 |
| Ny refin'ny vokatra | 3.1 x 2.6 x 0.8 santimetatra (7.9 x 6.6 x 2.0 cm) |
| Lanja entana | 0.71 ounces (0.02 kilao) |
| Karazana bateria | 1 Lithium Metal bateria (tafiditra) |
| KEVITRA | plastika |
| loko | Maitso |
| mpanamboatra | Extech |
| Daty azo alaina voalohany | 20 aprily 2004 |
10. Warranty sy fanohanana
Extech Instruments products are designed for reliability and performance. For specific warranty information, please refer to the warranty card included with your product or visit the official Extech Instruments website. For technical support, troubleshooting assistance beyond this manual, or to inquire about replacement parts, please contact Extech Instruments customer service through their official channels.
Afaka mahita fampahalalana bebe kokoa sy loharano fanohanana ianao ao amin'ny Extech Instruments Brand Store on Amazon.





