STABILA
LD 250 BT
Product Overview
- 1) On/Measure
- 2) Area / Volume / Unit
- 3) Bluetooth®
- 4) Clear / Off
Instrument Set-up and Introduction
⚠️ The safety instructions and the user manual should be read through carefully before the product is used for the first time.
The person responsible for the product must ensure that all users understand these directions and adhere to them.
Device Operation Basics
The STABILA LD 250 BT features a display showing measurements, typically in meters (m). Key controls include:
1. Power/Measure Button: Initiates measurement or turns the device on/off.
2. Function Button (FUNC): Used to cycle through functions like Area, Volume, and Unit selection.
3. Bluetooth Button: Activates or deactivates the Bluetooth connection.
4. Clear/Off Button: Clears the current measurement or turns the device off.
Basic Operations and Setup
Battery Installation: The device requires 2 x AAA batteries. Ensure correct polarity when inserting.
Unit Selection: Press and hold the FUNC button for 2 seconds to change the measurement unit (e.g., meters, feet, inches). The display shows formats like 0.000 m, 0'00"1/16, or 0 in 1/16.
Beep ON/OFF: Press FUNC and the Bluetooth button simultaneously for 2 seconds to toggle audible beeps.
Power Off: Press and hold the Clear/Off button (circular arrow icon) for 2 seconds to turn the device off.
Bluetooth ON/OFF: Press and hold the Bluetooth button for 2 seconds to enable or disable Bluetooth connectivity.
Measurement Scenarios: The device can measure distances from walls or corners. Diagrams illustrate measurements taken from two points in a corner (labeled 1 and 2) and three points along a wall (labeled 1, 2, and 3).
Example Measurements: A distance of 8.532 m is shown being measured from a wall. Another diagram suggests a potential area measurement of 18.462 m².
Connectivity: The device can connect wirelessly via Bluetooth to devices like laptops and smartphones.
Technical Data
| Parameter | Value |
|---|---|
| Accuracy with favourable conditions * | ± 2.0 mm / ± 0.08 in *** |
| Accuracy with unfavourable conditions ** | ± 3.0 mm / ± 0.12 in *** |
| Range with favourable conditions * | 0.2-50 m / 0.6-164 ft |
| Range with unfavourable conditions ** | 0.2-40 m/0.6-131 ft |
| Smallest unit displayed | 1 mm / 0.04 in |
| Laser class | 2 |
| Laser type | 635 nm, < 1 mW |
| Ø laser point at distances | 6/30 mm (at 6/30 m) |
| Protection class | IP54 |
| Autom. laser switch off | after 90 s |
| Autom. power switch-off | after 180 s |
| Battery durability (2 x AAA) | up to 5000 measurements |
| Dimension (H x D x W) | 115 x 53 x 25 mm / 4.5 x 2.1 x 1 in |
| Weight (with batteries) | 95 g / 3.4 oz |
| Temperature range: Storage | -25 to 70 °C / -13 to 158 °F |
| Temperature range: Operation | 0 to 40 °C / 32 to 104 °F |
* Favourable conditions: white and diffuse reflecting target (e.g., white painted wall), low background illumination, and moderate temperatures.
** Unfavourable conditions: targets with lower or higher reflectivity, high background illumination, or temperatures at the upper or lower end of the specified range.
*** Tolerances apply from 0.2 m to 5 m with a confidence level of 95%. Tolerance may deteriorate by 0.1 mm/m for distances above 5 m in favourable conditions, and by 0.15 mm/m in unfavourable conditions.
Message Codes and Laser Classification
If the 'Error' message persists after switching the device on repeatedly, contact the dealer. If 'InFo' appears with a number, press the Clear button and consult the following:
Message Codes
| No. | Cause | Correction |
|---|---|---|
| 204 | Calculation error | Perform measurement again. |
| 240 | Data transfer error | Repeat procedure. |
| 252 | Temperature too high | Let device cool down. |
| 253 | Temperature too low | Warm device up. |
| 254 | Battery voltage too low for measurements | Change batteries. |
| 255 | Received signal too weak, measuring time too long | Change target surface (e.g., white paper). |
| 256 | Received signal too high | Change target surface (e.g., white paper). |
| 257 | Too much background light | Shadow target area. |
| 258 | Measurement outside of measuring range | Correct range. |
| 260 | Laser beam interrupted | Repeat measurement. |
Laser Classification
| Parameter | Value |
|---|---|
| Wavelength | 635 nm |
| Maximum radiant output power used for classification | 0.95 mW |
| Pulse repetition frequency | 320 MHz |
| Pulse duration | >400 ps |
| Beam divergence | 0.16 mrad x 0.6 mrad |
Warranty and Responsibilities
Warranty
STABILA provides a two-year warranty for the product. Further information can be found on the Internet at: www.stabila.de.
Areas of Responsibility
Responsibilities of the manufacturer of the original equipment:
STABILA Messgeräte
Gustav Ullrich GmbH
P.O. Box 13 40/D-76851 Annweiler
Landauer Str. 45/D-76855 Annweiler
USA/Canada:
STABILA Inc.
332 Industrial Drive
South Elgin, IL 60177
1.800.869.7460
The company above is responsible for supplying the product, including the User Manual in a completely safe condition. The company above is not responsible for third party accessories.
Responsibilities of the person in charge of the instrument:
- To understand the safety instructions on the product and the instructions in the User Manual.
- To be familiar with local safety regulations relating to accident prevention.
- Always prevent access to the product by unauthorised personnel.
Use of the product with Bluetooth® and Precautions
⚠️WARNING: Electromagnetic radiation can cause disturbances in other equipment, in installations (e.g., medical ones such as pacemakers or hearing aids) and in aircraft. It can also affect humans and animals.
Precautions:
Although this product conforms to the most stringent standards and regulations, the possibility of harm to people and animals cannot totally be excluded.
- Do not use the product near petrol stations, chemical plants, in areas with a potentially explosive atmosphere and where blasting takes place.
- Do not use the product near medical equipment.
- Do not use the product in airplanes.
- Do not use the product near your body for extended periods.
