Catalogues - crack-depth-meter

Catalogue Crack Depth Meter

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Measuring set-up

Adaptable

Optimised for steel, iron and austenitic steels. A special version of the device can also be used for copper, brass, aluminium or other electrically conductive materials.

Simple and easy measurement

Calibrate the probe on the workpiece by means of an artificial crack or on a crack-free surface. Place the measuring pins on both sides of the crack onto the surface. Read crack depth from the display.

Accurate results

The RMG uses the AC electrical potential drop method with alternating current. Caused by the skin effect, the result of measurement is rather independent from the geometry of the work-piece. A simp le calibration procedure ensures that material influences and probe tolerances are widely compensated by the instrument. The scope of supply comprises a control block with an artificial crack to check and calibrate the instrument and the probe before the measurement. A subsequent material correction procedure on a crack-free surface of the workpiece yields good accuracy for many materials. Nevertheless, optimum accuracy is reached with one or more (up to 20) reference cracks of known depths which can be read in by the instrument. This function permits improved results even on those workpieces and materials which due to their unusual magnetic and electric properties were hither to considered as d ifficult for applying the AC potential drop method.

Sturdy and practicable

Shock-proof housing with washable keyboard.

Technical Data

Application:

Depth determination of surface cracks in electrically conductive materials

Principle of measurement: AC electrical potential drop method Dimensions (W x H x D): 83 x 151 x 35 mm³

Power supply:

2 x 1,5 V Alkali-Manganese drycells, size AA (Mignon); alternatively

2 x 1,2 V NiCd- or Ni-Hydrid-rechargeable batteries, size AA Optical alarm in case of empty batteries

At least 11.5 hrs with Alkali-Manganese cells

A total number of approx. 3850 values can be stored in up to 300 batches. For each batch, a statistical evaluation can be printed out. This evaluation determines the minimum value, the maximum value, the average and the standard deviation.

0 to 99.9 mm

Depending on material and measuring range. Typical figure for two-point material correction: Ferro-magnetic material 1 to 15 %, austenitic material 1 to 25 %.

RS232C to KARL DEUTSCH

printer oder PC:

4800 Bauds, 8 data bits,

1 stop bit, no parity-bit

Operation

from 0°C to 45°C,

Storage temp.:

- 20°C to + 60°C with

removed batteries,

from 0°C to + 45°C

with inserted batteries

(depending on battery type

and brand)

Operating time: Data Storage:

Crack between the measuring pins. The result is independent of the width of the crack.

Typical Application

Measuring range: Measurement accuracy:

Serial interface:

Environment conditions:

In production testing, the RMG helps to decide whether a further machining is possible: Is the crack depth within the manufacturing tolerance or permissible limit? If production or transportation machines are inspected, the crack growth can be monitored with the RMG to determine the most economic repair moment.

Ordering data

Instrument

RMG 4015.............................................................. 4015.003

Probes

Probe RMSQ 0°.................................................... 4418.001

Probe RMSL 0°...................................................... 4416.001

Probe RMSL 90°.................................................... 4417.001

Probe set for inclined cracks, consisting of: Probe RMSL-S 0°incl. contact magnet + cable ... 4421.001 Probe RMSL-S 90°incl. contact magnet + cable . 4420.001 Special characteristic for NFe ............................... 4901.001

Accessories

Control block (0 - 10 mm crack)............................ 4720.002

Charger

for inserted rechargeable batteries (230 V)............ 2806.001

Rechargeable battery set NiMH (2x 1.5 V AA)....... 6016.001

External charger 230 V for NiCd/NiMH batt.......... 6015.001

Matrix printer

(incl. 230 V mains unit, paper roll, printer ribbon).. 6010.001 Matrix printer

(incl. 115 V mains unit, paper roll, printer ribbon).. 6010.101 Printer cable

RMG 4015 (Lemo) - Matrix printer 6010 ................ 1657.305

PC cable

RMG 4015 (Lemo) - PC (RS232C interface).......... 1657.307

incl. 9-pin adapter D-Sub (m) - 25-pin D-Sub (f)

Fitting tool for probe contact pins ......................... 4816.001

Protection bag for RMG 4015................................ 4825.001

Software

PC data transfer "STATWIN 2002" ........................ 2904.001

Spare parts

8 contact pins (standard) ....................................... 4815.001

4 contact pins (needle) .......................................... 4815.002

4 contact pins (self-twisting).................................. 4815.003

Polishing vleece ..................................................... 4820.001

Paper roll for printer 6010 ...................................... 6011.001

Printer ribbon (black) for printer 6010.................... 6012.001

Mains/charger unit (230 V) for printer 6010 ........... 6013.001

Mains/charger unit (115 V) for printer 6010 ........... 6014.001

Commonly used probes

Small, light-weight, battery operated for mobile operation. Probes with exchangeable spring-loaded contact pins; suitable even for rough environment.

Menu und data processing

Menu-driven operation, data storage, batch operation for series of measurements, printer or PC connections are standard.

Probe choice

RMSQ for highest resolution and low specific resistance (also for non-ferrous metals). RMSL 0°for hard to reach areas, RMSL 90° with guiding prism for cylindrical surfaces. For inclined cracks probe set RMSL-S 90°with 90°-handle, RMSL-S 0°with 0°-handle. More special probes on request.

Contact pins

In general, all probes are usually equipped with sturdy standard pins which are suitable for all applications. Nevertheless, one set of spare pins are delivered together with each probe. Exchangeable special contact pins may help in difficult cases: Thin, non-conductive surface layers can better be penetrated by needle-contact pins. For better penetration through mechanically hard layers, self-twisting contact pins with spiral-shaped guidance are recommended. The pins rotate when the probe is placed on the surface.

Measuring probe set RMSL-S 90°

Phone: (+49-202)7192-0 Fax: (+49-202)714932 Otto-Hausmann-Ring 101 42115 Wuppertal, Germany info@karldeutsch.de • www.karldeutsch.de

KARL DEUTSCH