300B - Thermometer Comark - Free user manual and instructions
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| Product Type | Digital Thermometer |
| Brand | Comark |
| Model | 300B |
| Measurement Range | -50°C to 300°C (-58°F to 572°F) |
| Accuracy | ±0.5°C (±0.9°F) from -20°C to 100°C; ±1°C elsewhere |
| Resolution | 0.1°C/°F |
| Display | LCD, 3.5-digit |
| Power Supply | 1 x LR44 button cell battery (1.5V) |
| Battery Life | Approximately 200 hours of continuous use |
| Dimensions | 150 x 30 x 20 mm (5.9 x 1.2 x 0.8 in) |
| Weight | 50 g (1.8 oz) including battery |
| Probe Type | External Type K thermocouple probe (included) |
| Functions | Data hold, Max/Min recall, Auto power off |
| Material | ABS plastic housing |
| Cleaning | Wipe with a soft, damp cloth; do not immerse |
| Safety | Not waterproof; avoid contact with liquids |
| Replaceable Parts | Battery and probe |
| Certifications | CE, RoHS |
Frequently Asked Questions - 300B Comark
How do I change the battery in my Comark 300B thermometer?
Remove the battery compartment cover on the back of the thermometer. Replace the old LR44 battery with a new one, ensuring correct polarity. Close the cover securely.
How should I clean the thermometer and probe?
Use a soft, damp cloth to wipe the thermometer body. For the probe, gently clean with a cloth moistened with isopropyl alcohol. Do not immerse any part in water.
What is the measurement range of the Comark 300B?
The thermometer can measure temperatures from -50°C to 300°C (-58°F to 572°F).
What is the accuracy of the 300B thermometer?
Accuracy is ±0.5°C (±0.9°F) in the range -20°C to 100°C, and ±1°C outside that range.
What type of probe does the Comark 300B use?
It uses a Type K thermocouple probe. The thermometer is designed to work with standard Type K probes.
How do I use the data hold function?
Press the HOLD button to freeze the current reading on the display. Press again to release and resume normal measurement.
What should I do if the display shows an error message?
Common error codes: 'OL' indicates over-range (temperature too high or low); 'LOB' indicates low battery. Replace battery or measure within range. If persistent, check probe connection.
Is the Comark 300B waterproof?
No, it is not waterproof. Avoid exposure to water or other liquids to prevent damage.
How do I calibrate the thermometer?
The Comark 300B is factory-calibrated and does not require user calibration. For high-accuracy applications, send it to a certified calibration lab.
Where can I purchase replacement probes or accessories?
Replacement Type K probes and batteries are available from Comark authorized dealers or online retailers. Use only genuine Comark parts for best performance.
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USER MANUAL 300B Comark
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Product information
Brand : Comark
Model : 300B
Category : Thermometer