VDO Stationary Set

Connects the WorkshopTab II to your rolling road, enabling W and L value measurement without an outdoor calibration lane. Wireless connection via the Workshop Link.

What Is the VDO Stationary Set?

The VDO Stationary Set – also referred to as the Rollenbank Interface Module or RIM – is an interface that connects the WorkshopTab II to a rolling road, enabling tachograph calibration to be carried out entirely within the workshop. It is designed for workshops that have an existing roller brake tester or rolling road and want to use it for tachograph calibration without requiring an outdoor 20-metre lane. During calibration, the W value – the number of electrical impulses per kilometre of travel – and the L value – the effective circumference of the tyre – must both be accurately measured and programmed into the tachograph. The Stationary Set captures both measurements automatically via the rolling road, transmitting the data wirelessly to the WorkshopTab II through the Workshop Link.

For workshops with a roller brake tester already in place, the Stationary Set removes the need for an outdoor calibration lane entirely. W and L values are measured automatically - no manual data entry, no weather dependency, no requirement to drive the vehicle outside.

The Rolling Road Calibration Process

The Stationary Set captures wheel revolution data from the rolling road and passes it to the WorkshopTab II via the Workshop Link. The WorkshopTab II then calculates the W and L values automatically as part of the standard calibration sequence.

1) Set up the reflector strip

A reflector strip is placed on the vehicle wheel. The rolling road sensor detects the strip as the wheel rotates, counting each revolution.

2) Run the vehicle on the rolling road

The vehicle is driven on the rolling road. The Stationary Set counts the KITAS impulses from the motion sensor alongside the wheel revolutions detected by the rolling road sensor.

3) Data transmitted wirelessly

The Stationary Set transmits the captured signals wirelessly to the WorkshopTab II via the Workshop Link. No manual data entry is required at this stage.

4) W and L values calculated automatically

The WorkshopTab II automatically calculates both the W value and the L value from the transmitted data. Both values are then programmed into the tachograph as part of the calibration sequence.

Two Approaches to W and L Value Measurement

There are two ways to measure the W and L values required during tachograph calibration. The right approach depends on your workshop layout and existing equipment.

Outdoor 20-Metre Lane - VDO Blue Meter

Vehicle driven through a measured outdoor lane
Blue Meter optical sensor positioned at the start of the lane
Measurements transmitted wirelessly to WorkshopTab II
Suitable for all workshops with available outdoor space
Weather dependent - requires dry, flat surface

Rolling Road - VDO Stationary Set

Vehicle driven on existing roller brake tester in the workshop
Reflector strip on wheel - sensor on rolling road detects revolutions
Measurements transmitted wirelessly to WorkshopTab II
No outdoor lane required - fully indoor calibration
Weather independent - no external space needed

The two methods are not mutually exclusive. Some workshops use the rolling road for routine calibrations and the Blue Meter for situations where the rolling road is in use or unavailable. Contact ETS to discuss the most practical configuration for your workshop setup.

What Your Workshop Needs Alongside the Stationary Set

The Stationary Set is one component in a complete rolling road calibration setup. The following are required for it to function correctly.

VDO WorkshopTab or WorkshopTab 2 - the primary calibration device
Workshop Link - the interface through which the Stationary Set communicates with the WorkshopTab.
Rolling road or roller brake tester - compatible with well-known rolling road suppliers. Confirm compatibility with ETS before purchase
Reflector strip - placed on the vehicle wheel during the rolling road run.

Part Number and Supply

The Stationary Set is available through ETS as part of a complete workshop calibration setup. Contact ETS to confirm current stock, pricing, and compatibility with your rolling road before ordering.

Item	Part Number	Notes
VDO Stationary Set (RIM)	A2C59512714	Rolling Road Interface Module. Wireless connection to WorkshopTab via Workshop Link. Confirm rolling road compatibility with ETS before ordering.

What is a rolling road and why use one for tachograph calibration?

Not available for direct online purchase. Contact our workshop equipment team to discuss supply options,
accessories, and pricing.

Frequently Asked Questions

What is the W-value and why does it need to be measured?

A rolling road – also called a roller brake tester – is workshop equipment that allows a vehicle’s wheels to rotate in a fixed position. It is commonly used in commercial vehicle testing centres and workshops for brake testing and vehicle inspections. During tachograph calibration, the W value and L value must be measured by counting wheel rotations over a known distance. Traditionally this requires an outdoor 20-metre calibration lane. The Stationary Set allows the same measurement to be taken on the rolling road inside the workshop, removing the need for an outdoor lane and making the calibration process fully weather independent.

Does the Stationary Set replace the VDO Blue Meter?

Not exactly – they solve the same problem using different methods. The Blue Meter is designed for outdoor 20-metre lane measurement. The Stationary Set is designed for rolling road measurement inside the workshop. Both transmit W and L values wirelessly to the WorkshopTab. If your workshop has a rolling road, the Stationary Set is the more practical option for routine calibrations. Some workshops keep both – using the rolling road by default and the Blue Meter as an alternative when the rolling road is in use. Contact ETS to discuss which is right for your setup.

What is the Workshop Link and is it required?

Yes, the Workshop Link is required. It is the interface device through which the Stationary Set communicates with the WorkshopTab. Without it, the Stationary Set cannot transmit data to the WorkshopTab. If your workshop already uses a WorkshopTab for tachograph calibrations, you may already have the Workshop Link in place. Contact ETS to confirm your current setup before ordering.

Which rolling roads is the Stationary Set compatible with?

VDO state that the Stationary Set works with well-known rolling road suppliers, but the specific brands and models compatible with it require confirmation with ETS before purchasing. Contact us with details of your existing rolling road equipment, and we will confirm compatibility.

Does the Stationary Set work with the WorkshopTab II?

Yes. All WorkshopTab accessories are compatible with the WorkshopTab II, with the exception of the original docking station. The Stationary Set works with both the WorkshopTab and the WorkshopTab II via the Workshop Link.

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