Motwane’s Contact Resistance Meter- CRM-100A is a Digital Micro Ohmmeter, designed to measure extremely low resistances. The instrument is based on the proven four wire measurement method for low resistances to eliminate the effect of lead resistance of two wire methods. The instrument is designed to replace a complex bridge set up with a single compact unit. The DC injection is adjustable between 10A to 100A. The testing information is displayed on a large LCD with a backlight and real-time data is displayed during the test ON conditions. The instrument gives a high resolution of 0.1μΩ on 200 μΩ resistance range. The instrument is easy to operate and user friendly. Accessories are rugged and come with heavy duty clips for better grip on the test objects. The kit and accessories are housed in a trolley mounted case for easy transportation. Advanced Dot Net based software is provided for data downloading, analysis, and report generation. The instrument can be operated through software from a remote location. Internal memory is provided for onsite data storage.
Stationary and moving contacts are built from alloys that are formulated to endure the stresses of electrical arcing. However, if contacts are not maintained regularly, their electrical resistance builds up due to repeated arcing, resulting in a significant decrease in the contact’s ability to carry current and an increase in resistance. Excessive corrosion of contacts is detrimental to the breaker’s performance. Hence to check contacts, apply DC and measure the contact resistance or voltage drop across the closed contacts. The use of a higher current value gives more reliable results than using lower current values. The resistance value is usually measured in micro ohms (μΩ).
CRM-100A has a large application for direct and indirect measurements in various industries and manufacturing facilities. High accuracy and repeatability make it a reliable tool for quality assurance and easy operations. It is a very handy tool for quick maintenance checks in various industries.
Typical resistance measurement applications are:
Output current :
DC test current: 10A, 20A, 50A & 100A
Open circuit voltage: 5V DC
|Accuracy||±(0.5% + 5 digits)|
Continuous operation up to 50A
4 minutes-ON and 10 minutes-OFF for 100A
3½ digit large LCD display
USB for data transfer
Audio-visual indication for test on operation
Indication on mains on the operation
Blinking display for over range indication
230V, 50Hz ± 10%
Operating Temperature: 0°C to 55°C
Storage Temperature: -10°C to 55°C
Humidity: < 90% RH, non condensing
Dimensions ( DxWxH in mm ) : 365 x 426 x 178
Weight : 12 Kg
Safety : According to EN 61010 – 1
EMC : According to EN 61326 – 1
Output lead set 4 X 5m
Mains power cord
Mains protection fuse 5A
Note: Do not use this instrument in the HT switchyard
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