Help Center

Help Center

Please check that your Staht proof load tester is charged. Use the USB-C port and charging cable to charge the unit. You can plug it into the mains, a power bank, or a USB car charger. If after a full charge it does not switch on, then please contact the Staht Technical Support team.

You can manually switch off the proof tester by pressing and holding the <GREEN> button for 2 seconds. If the load on the screen is <0.3kN, your Staht tester will automatically shut off after 10 minutes of inactivity. If the load on the screen is >0.3kN, then your Staht proof load tester will remain on, as load is being applied by the unit.

Please ensure that the correct USB-C adaptor lead is being used, and it is in good condition. Please ensure that it is correctly located in the charging port, and that it is receiving power from the other end via the mains or a charged power bank. 

Approximately 8 hours with constant use with a Bluetooth® wireless connection from a full charge.


The proof load tester is powered by a rechargeable Li-ion battery. Under international shipping regulations, new items are not shipped fully charged. Fully charge the battery prior to first use. It takes 2 hours to fully charge using UK mains charging.

60kN / 13489lbf is the maximum SWL / rated load. Above 63kN the display shows “Overload – Remove Load”. At this point you will need to decrease the load on the anchor to prevent any potential damage to the unit.

Before applying any load, ensure the Hex Drive is wound out to the indicator line. Next, ensure the top nut is fully tightened against the primary piston so that a load is shown on the screen (typically 0.5kN). After following these steps, if you still have the same issue, check to see if your anchor is slipping / failing.

Press the Yellow button to show the Peak and Live loads simultaneously. 

Yes, via the Staht Connect app, available on both Android and iOS.

You should use the bubble level on horizontal or vertical surfaces to level the bridge. On sloped surfaces, do not use the bubble level.

The bridge height of the Staht proof load tester has been designed to accommodate the vast majority of expected anchor standoff situations for the M6 – M20 range. Also, there is fine height adjustment to ensure the bridge is level. If additional height is required, then it is advised that you use suitable concrete or steel blocks to increase the overall height of the bridge. It is best practice to position the leg braces as low down on the legs as possible, and only raise them further up the legs if required.

An anchor may not achieve an expected load for many different reasons. The most common reasons are that the substrate may not as strong as expected or that the anchor has not been installed correctly. Please check with your anchor supplier if you need more guidance on anchor performance.

17mm. A 17mm socket is supplied with a 3/8” ratchet wrench in the kit as standard. Staht do not advise that users apply load using anything other than the ratchet wrench provided as this invalidate your warranty.

Yes, it comes calibrated, which is valid for 12 months.

No. To save on downtime, shipping and overall carbon footprint, take your Staht proof load tester to a local calibration laboratory, where they can digitally calibrate your Staht proof load tester. Please contact Staht for a list of accredited laboratories.

Although the Staht proof tester is designed to be robust, it is advisable that the Staht proof load tester has a calibration check to ensure that it is still functioning correctly before using it again.

If the last calibration was performed by Staht, then please contact the team. If the last calibration was performed by an approved calibration laboratory, then please contact them to arrange a replacement calibration certificate.

Staht recommend that the proof load tester is serviced every 3 years by Staht or a Staht approved service agent. 

The Staht proof load tester is designed to require minimal maintenance to ensure the continued functionality of the unit. It is best practice to keep your proof load tester in a clean and use it in accordance with the Staht User Instruction Manual. The design of the Staht proof load tester means that external lubrication is not required during the lifetime of the product.

A range of spare parts are available from Staht.

The adaptors that come as standard go up to M20. It is possible to test larger diameter threads with the use of additional adaptors. Please contact Staht to discuss your options.

The Staht proof load tester is not supplied with imperial anchor adaptors. It is possible to test imperial threads using appropriate nuts and washers in the Adaptor Jaw.

The warranty on the proof tester is 12 months from purchase, providing the proof tester has been used in accordance with the Staht User Instruction Manual.

All kit items, excluding the lanyards and the charge cable are covered by the Staht warranty.