Measuring bonding resistance in aircraft frames
Any electrically operated equipment used on aircraft as well as the bonding resistance of the frame itself, has to be checked regularly to ensure safety is not compromised.
So, the ability to make accurate and reliable measurements is crucial but with the values involved usually very low - often down to milliohms - the key requirement is to understand and eliminate potential sources of error from the measurement process.
To achieve this Cropico, the specialist supplier of precision measurement equipment, offers a range of advanced, precision instruments capable of meeting the demanding requirements of the aircraft industry.
The Cropico Series 4000 digital ohmmeter range provides a practical solution for a wide range of low resistance measurement applications.
The portable and rugged instrument includes a number of advanced features to ensure measurement accuracy including forward and reverse current measurement with auto averaging, true current zero, long scale length and a selectable measurement range from 40m ohms to 4k ohms with respective resolutions between 10 micro ohms and 1 ohm.
Within the range, model 4001 also includes temperature compensation, with preset coefficients for copper and aluminium plus user settable coefficients for other materials. Temperature measurement over the range –50 to +800ºC is also available.
Protection up to 415V rms is provided at the measurement terminals and push button operation is achieved easily by clearly marked function controls. Direct reading measured values are displayed on a four-digit LCD display. Over range and low battery indication is also provided and warning LEDs illuminate when an open circuit lead condition is detected.
Cropico are industry leading manufacturers of thermocouples, temperature sensors & temperature measurement devices.
