Description
The RMO-H series – battery operated and handheld micro-ohmmeters are unique solution for the contact resistance measurement of switchgears according to international standards (e.g. IEC 62271-100). RMO-H can be used for number of applications where non-inductive resistance is checked, during factory inspections or testing in the high-induction field environments. The set is equipped with the overcurrent protection.
RMO-H Series contains six models in total, divided in 2 sub-series depending of the test leads length requirement and the battery type:
- – RMO-H1, RMO-H2 and RMO-H3 models are intended for use with up to 5 m cables. 1-cell Li-Po battery with 8200 mAh capacity provides output voltage up to 4,1 V DC.
– RMO-H21, RMO-H22 and RMO-H23 models are ideal for applications where test leads longer than 5 m are required. The high output voltage (up to 8,3 V DC) is provided by 2-cell 4100 mAh Li-Po battery.
The test current is regulated and can be selected in a range of 1 A to maximum 300 A, depending of the maximum test current rating:
- – RMO-H1, RMO-H21 models – up to 100 A DC
– RMO-H2, RMO-H22 models – up to 220 A DC
– RMO-H3, RMO-H23 models – up to 300 A DC.
The high-capacity Li-Po battery enables generating a true DC ripple-free current. The main advantages of LI-Po technology over ultra-capacitor technology are:
- – No rest time needed between tests since there is no ultra-capacitor charging.
– Test current is regulated and it is not load-dependent like in case of ultra- capacitor. This means that user can select certain current value for the measurement (from 1 A to 300 A).
With use of automatic test ramp (picture bellow), the test current is gradually increased before the measurement and decreased after the measurement is competed. This significantly decreases influence of magnetic transients.
The RMO-H instrument can internally store up to 1000 measurements (time and date stamped).
DV-Win software enables download of the results, creating and exporting test reports in different formats. Communication between the RMO-H and a PC is through a Bluetooth communication.
Data sheet
