Technical data

working temperature

20 °C (+/- 5 K) with mechanical spirit levels
0 °C to + 40 ° C with electronic spirit levels

storage temperature

From -40 °C to + 70 °C with mechanical spirit levels
From -20 °C to + 70 °C with electronic spirit levels

Shaft diameter minimal

19.3 mm (special models 4520-4523 for larger shaft diameters)  
15.4 on models 422x / 100
3.0 mm on models 4620 / xxx

Shaft diameter maximum

115.9 mm (special models 4520-4523 for larger shaft diameters) 
85.0 on models 422x / 100
30.0 mm on models 4620 / xxx

Measuring range: mechanical

Depends on the accuracy of the built-in bubble and the number of scale divisions. The product of precision and number of scale divisions gives the value of the measurement range after each page.
Example: With an accuracy of 0,02 mm/m (20 μm/m) and 6 scale parts (from the middle to each side) the measuring range is +/- 6 x 0,02 mm/m = +/- 0,12 mm/m (+/- 120 μm/m).

The exact data are located at the respective product in the shop.

Measuring range: electronic

There are two measuring ranges adjustable. The measuring range is 2000 times the value of the set accuracy.
Example: Encoder is adjustable to 0.01 mm/m fine range and
0.1 mm/m coarse range.
At an accuracy of
0.01 mm / m (10 μm/m), the measuring range is +/- 20 mm/m
0.1 mm / m (100 μm/m), the measuring range is +/- 200 mm/m

properties:

Fixed installation and adjustability

Roeckle guarantees consistent accuracy through tension-free installation of the bubble. This eliminates time-consuming readjustments and calibrations before measuring.

casing

Roeckle precision spirit levels according to DIN 877 have a sturdy design made of high-quality special cast iron, textured. Available depending on the model in lengths of 60, 90, 100, 120, 150, 160, 200, 250, 300, 500 mm.

The existing full heat protection around the entire housing prevents influences from hand and breath heat.

Housing recesses allow lateral reading of the dragonfly.

measuring surfaces

With prismatic (150 °) and flat sole, for aligning horizontal surfaces and waves. All measuring surfaces are finely ground.

Versions are also available with flat sole, with magnetic inserts or with holes for fixing screws.

Customized designs (other angles) are possible at any time.

accuracy

The devices are equipped with polished and split longitudinal spirit level and transverse level. Available depending on model and length in the accuracies 0.6, 0.3, 0.1, 0.04, 0.02, 0.01 mm / m. The scale value of the longitudinal level is indicated on the nameplate. The permissible deviations are very different according to DIN 877 depending on the accuracy.
Example: The accuracy of 0.02 mm / m means: If the inclination of 20μm at a distance of 1 meter deviates, the air bubble will move 1 scale towards the higher side. According to DIN 877, the permissible deviation is 5μm (corresponds to 0.5 scale division).

application process:

Operating instruction and appropriate treatment of Precision Levels:

1. The measurement device is highly sensitive and must be protected against humidity, cold and heat. The working temperature of mechanical Precision Levels is 20°C (+/-5 K), the storage temperature is from -40°C to +70°C.
2. Before use the temperature of the Precision Level and the measuring object must have an equal temperature. Both parts must be within the range of the working temperature
3. The measuring bases of the level and the object must be accurately clean.
4. Before and during measurement the level only may be touched on the plastic hand grips for thermal protection.
5. Body heat and breath may have an effect on the result of measurement. Avoid long-lasting contact to the level.
6. Slide (but don’t put) the level on the object. There must be a close contact between the level and the object. The level has to bear solidly.
7. There mustn’t be any damage (e.g. bulging) of the measuring base. Commutation failure may cause an error of measurement. Slight bulges can be erased with an oil rubber.
8. The result of measurement can be read when the bubble stops oscillating. This can last for up to 40 seconds depending on the accuracy of the level.
9. For each measuring the level has to be slid to the same position to eliminate any error of measurement caused by unevenness of the measuring object.
10. Vibrations caused by the environment must not be transmitted to the object.
11. In order to exclude all measuring errors, it is essential to carry out a control measurement on the envelope (turn by 180 °) before each measurement, for instructions see below Procedure: Check of the deviation of Zero Point.
12. After use keep the Precision Level in its case for protection.
13. For repair expert knowledge is necessary. So the repair only should be processed by the manufacturer.
14. The manufacturer offers economic calibration service to keep the measuring device steadily in working order for a long time.
15. Attention: In case of damage of the vial by external impact, the room has to be vented effectually. The liquid of the vial evaporates into the environment. It may cause sickness, dizziness or unconsciousness in the worst case.

Incline check of the measuring object by an 180 degree turn

Incline check of the measuring object by an 180 degree turn Slide the level on a clean, plane and smooth horizontal surface. The negative range is on the left of both index lines, the positive range is on the right. The position of the static bubble is the first indicated value A (in scale division Skt) on the scale. Turn the level through 180 degrees, slide it to the same position of the surface. Read the second indicated value B. Add value A and value B. Devide by 2. The result is the inclination (A+B)/2. Each test result is to be read on the equal index line (e.g. on the right). The algebraic sign has to be observed.
Example: Accuracy = 0.1 mm/m, value A = +0.2 Skt, value B = -0.4 Skt, inclination = -10 μm/m (increasing left)

Check of the deviation of Zero Point by an 180 degree turn

Slide the level on a clean, plane and smooth horizontal surface. The negative range is on the left of both index lines, the positive range is on the right. For the first measuring the transverse vial must be directed to the right side. Otherwise the preceding sign will change (company standard). The position of the static bubble is the first indicated value A (in scale division Skt) on the scale. Turn the level through 180 degrees, slide it to the same position of the surface. Read the second indicated value B. Subtract value B from value A (result: difference on an 180 degree turn DaU). Devide by 2. The result is the Deviation of Zero Point (A-B)/2. Each test result is to be read on the equal index line (e.g. on the right). The algebraic sign has to be observed.
Example: Accuracy = 0.02 mm/m, value A = -0.2 Skt, value B = -0.8 Skt, DaU = +0.6 Skt = 6 μm/m