Our Test Stations | Adjustment, Calibration and CE-M Approval of your crane scale
For over 40 years we have been specialists in the weighing of suspended loads and offer also all important services for crane scales.
The constant accuracy of your measuring instruments has the highest priority, not only in terms of compliance with standards and regulations, but also in terms of cost savings!
If the value of goods is calculated according to their weight, then inaccurate measurement results quickly cause annual losses of several thousand euros!
However, in practice, often the relevant terms adjustment, calibration and CE-M Approval are confused or equated.
For a better understanding, we would like to explain to you briefly what the definition of each term is.
When is an adjustment, calibration or CE-M Approval of my crane scale necessary?
According to DIN 1319-1: 1995, adjustment is defined as the setting up or the comparison of a measuring device to eliminate systematic deviations to a minimum which is acceptable for the intended applcation.
That means in plain language the shown value on your crane scale display will be adapted to the actual reference value.
Crane scales are adjusted, if during a calibration the deviation between reference weight and shown weight at display are impermissibly high. So adjustments require changes in the measuring system.
Calibrate defines the detection and documentation of the deviation of a crane scale display from the actual weight.
When calibrating the crane scale, the link between the input and output variables is determined and documented under specified conditions.
The input quantity is the actual weight and the output quantity is the electrical
output signal that is shown on display.
The duration until the next calibration of the crane scale is not exactly defined,
but may depend on numerous factors, such as Temperature fluctuations, frequency
of use and field of application.
As a rule, we recommend our customers, whose scales are used in an industrial environment to recalibrate once per year.
CE-M Approval is a legally regulated quality control. A CE-M approved crane scale is required by law when used to define product prices. The CE-M approval of crane scales also includes separate labeling regulations. Thus, a crane scale is sealed after the conformitty assessment was successfully accepted by the legal testing authority, so that no subsequent manipulation of the measuring device is possible.
For example, a CE-M approved crane scale is required if it weighs steel coils whose selling price depends on the exact weight.
All crane scales with a load capacity of up to three tonnes must be re-calibrated every two years. Crane scales with a maximum weight load of more than three tonnes only have to be re-calibrated every three years.
What distinguishes EHP?
We adjust, calibrate and CE-M approve your scales, even third-party products, quickly and cost-effectively at our own test stands. We constantly perform CE-M Approvals in cooperation with the regional legal testing authorities.
Due to our optimized workflow, we can carry out this service for you in less than three working days!
Because of these short turnaround times, you benefit from the fact that your weighing process will only be interrupted for a short period and you will immediately receive your crane scale back. This saves you time and costs.
If you are still in need of a crane scale, we can also provide you with an adequate rental scale to bridge the service time. All our test stands are so-called "dead load test benches". These measuring devices are among the most precise of their kind.
Here, the crane scale is loaded and unloaded step by step with calibrated weights in order to precisely determine the behaviour of the load cell. We only allow minimal deviations of 0.03%.
Conventional suppliers calibrate with the aid of a hydraulic lifting plunger. Due to numerous influencing factors such as fluctuating hydraulic pressure, wear of the seals, resulting tensile force, etc., considerable measurement inaccuracies can occur. An inaccurately calibrated scale can lead to weighing errors, which can result in lost sales or dissatisfied customers.
Conventional suppliers calibrate with the help of a hydraulic lifting ram. Due to numerous influencing factors such as fluctuating hydraulic pressure, wear of the seals, resulting tensile force, etc., considerable measurement inaccuracies can occur here. An inaccurately calibrated scale in turn leads to weighing errors that can lead to a loss of revenue or dissatisfied customers.
We would also be pleased to advise you personally!
How can I register my scale for calibration or CE-M approval at EHP?
Simply use the information form below. If possible, please give us information upfront like manufacturer, year of manufacture and device number of the crane scale.
Your inquiry is of course non-binding, but we will process it immediately.
You are also welcome to contact us directly by e-mail or phone to clarify your request!