Digital milliohmmeter combines versatility and accuracy

Citation

(2007), "Digital milliohmmeter combines versatility and accuracy", Microelectronics International, Vol. 24 No. 1. https://doi.org/10.1108/mi.2007.21824aad.007

Digital milliohmmeter combines versatility and accuracy

Digital milliohmmeter combines versatility and accuracy

The Cropico DO4A is a highly versatile digital ohmmeter used for low resistance measurement across a diverse range of applications including electrical bonding resistance, component quality assurance and power system safety applications.

The DO4A uses True 4 Wire measurement to eliminate lead resistance errors across a push button selectable range from 40mV to 4kV with respective resolutions between 10mV and 1V.

Contained in an aluminium case with a tilted carrying handle, the robust unit is a highly practical instrument that can be used in the workshop, by field or maintenance engineers or as part of more comprehensive electrical test facilities. Input protection is provided up to 415V rms (Figure 1).

For ease of operation the control functions have been kept to a minimum and a four digit LCD gives direct readings of the resistance measured, with over range and low battery indicators also provided.

Figure 1 Cropico DO4A milliohmmeter

Other special features include an auto zero facility where thermal emf may cause a large measuring error and warning LEDs to indicate an open circuit lead condition.

Rechargeable batteries provide full portability with over 14h of continuous working on the lowest ranges and 28h operation on others.

The Cropico DO4A is supplied ready for immediate use and comes complete with battery, mains cord and measuring leads. In addition, a wide range of optional accessories including duplex handspikes, other specialist clips, long length leads and wire clamps further extend the instrument's versatility.

For further information, visit the web site: www.cropico.co.uk