338 - Measuring equipment Testo - Free user manual and instructions
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| Type of product | Handheld measuring instrument |
| Dimensions (L x W x H) | 190 x 75 x 30 mm |
| Weight | 200 g (without batteries) |
| Power supply | 2 x AA batteries |
| Operating time | Approx. 200 hours |
| Measurement functions | Temperature, humidity, dew point |
| Temperature range | -20 to +50 °C |
| Humidity range | 0 to 100% RH |
| Display type | LCD with backlight |
| Data hold function | Yes |
| Auto power off | Yes, after 10 minutes |
| Protection class | IP40 |
| Interface | None (standalone) |
| Maintenance and cleaning | Wipe with a soft, dry cloth. Do not use solvents. |
| Safety precautions | Do not immerse in water. Avoid extreme temperatures and direct sunlight. |
| Spare parts and repairability | Batteries replaceable. Sensor can be replaced by authorized service center. |
| General information | For indoor use only. Original manual and CE declaration available. |
Frequently Asked Questions - 338 Testo
How do I turn on the Testo 338?
Press the ON/OFF button for 2 seconds until the display lights up.
What type of batteries does the Testo 338 use?
It uses 2 AA batteries (1.5V). Rechargeable batteries can also be used.
How do I change the batteries?
Slide the battery cover on the back, remove old batteries, insert new ones respecting polarity, and close the cover.
How do I measure humidity?
Press the MODE button to select humidity measurement. Hold the sensor in the air and read the value.
What is the temperature measurement range?
The range is -20 to +50 °C (-4 to +122 °F).
How accurate is the humidity sensor?
Accuracy is typically ±2% RH (at 25 °C, 10-90% RH). Check the manual for full specification.
Does the device have an auto power off?
Yes, it turns off automatically after 10 minutes of inactivity to save batteries.
How do I clean the device?
Wipe the exterior with a soft, dry cloth. Do not use water, solvents, or abrasive cleaners.
Can I calibrate the sensor myself?
No, calibration requires special equipment and should be done by an authorized Testo service center.
Where can I download the user manual?
The manual is available for free download at notice-facile.com or the official Testo website.
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USER MANUAL 338 Testo
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Product information
Brand : Testo
Model : 338
Category : Measuring equipment