Lambda-Messtechnik GmbH Dresden

For tool-users, who are ISO 9000 certified or are planning to do so we recommend a regular  inspection of the tool focussing on test accuracy of the Pipe-Thermal Conductivity Test Tool λ-Meter RP1000 as follows:

• The tool user can check and verify accuracy of the tool in regular intervals (e.g. monthly or quarterly) by using a reference specimen with long-term stability (e.g. a pipe insulation consisting of thick mineral wool). The test conditions will not change and remain constant over time. The "RP1000-Control Program" can then be used for preparing and filing test reports (~18kB).
  
  
• Additionally the tests results can be processed and presented in the format of a so-called „Error Analysis Report“ (for error analysis and remedy). This report can be sent to the laboratory of Lambda-Meßtechnik GmbH Dresden for evaluation. The report helps to identify internal tool deviations for the individual variables that are used to calculate the thermal conductivity even if the test values have no significant discrepancy. All results of this examination will be documented in another report. If actual discrepancies do occur the tool user will of course get the best support possible to remedy the deviation and the tool will be restored to maximum accuracy.
  
  
• In some cases the ISO certification authority does not accept the reference specimen as evidence for the long-term stability of the tool. The tool can therefore be ordered in a special “ISO 9000- configuration”. This option allows the tool owner to check the individual test variables that are used to calculate the thermal conductivity for accuracy. It verifies that those variables are determined with a constant accuracy. A special “ISO 9000-test” can be done with the “ISO 9000-configuration”. During this test, the control unit displays the current temperature on the sensor-plates, the heat fluxes across the gap and towards the counter heater as well as the heating voltage and heating current. These signals are connected to coloured sockets situated on the back panel of the pipe thermal conductivity test tool λ-Meter RP 1000 for internal verification. This allows the user to measure (during stationary operation) the necessary signal voltages using a digital voltmeter of sufficient accuracy and to compare these with the values displayed by the control unit. The heating current can be verified indirectly with an external voltage reading over the internal precision resistor (0.1 %, temperature coefficient: 1). The verification of the measured temperatures is done by comparing the displayed real temperatures to the measured voltages on a temperature-voltage graph (provided with the configuration).
  
  
• This option clearly goes unmatched by any other tool manufacturer.

Also the tool-owner may always and anytime return his tool to the laboratory of Lambda-Meßtechnik GmbH Dresden for service and maintenance if necessary.