The SCR ELEKTRONIKS Millivolt Drop Tester is an industry acclaimed product. MVDT has a specially built constant current source (current generator) up to 400A (depending on model) and a dedicated PLC to store test parameters (in automatic models), perform test procedure, make the millivolt drop & junction resistance measurements and store test results, that can be retrieved later or downloaded to PC. PC based TestWare can display the test results & export those to Office, HTML, Printer or PDF. The manual models consist of the constant current source, digital ammeter and a digital millivolt meter with 3 ranges.
Microcontroller based unit
Automated Operation Available
Solid state DC current source from 1A to 400A depending on the range and model
Millivolt range from 0-2000 mV
Accurate adjustment of current with lesser time delay
Line and load regulation of about 0.2%
Compact in size
Light weight and portable unit
Heavy duty copper bus bars for minimal external voltage drop (error)
Programmable keypad on the front panel
LED Display to display test parameters and the test result
PC Interface possible with software (optional) to convert test results to tabulated formats such as EXCEL
MVDT M05 1) Output Current : 2-50A 2) Output Voltage : 5V 3) Size (HxWxDmm3) : 370x220x370 4) Weight : Less than 10 Kg.
MVDT M10 1) Output Current : 5-100A 2) Output Voltage : 2V 3) Size (HxWxDmm3) : 370x220x370 4) Weight : Less than 10 Kg.
MVDT M20 1) Output Current : 10-200A 2) Output Voltage : 2V 3) Size (HxWxDmm3) : 480x220x400 4) Weight : Less than 15 Kg.
MVDT M40 1) Output Current : 20-400A 2) Output Voltage : 2V 3) Size (HxWxDmm3) : 480x380x450 4) Weight : Less than 25 Kg.
Common Specifications for all models: 1) Line Regulation (200V to 250V) : 0.2% 2) Load Regulation (10-100% change) : 0.2% 3) Measurement Accuracy (current) : 1% 4) Measurement Accuracy (millivolt) : 1% 5) Millivolt Range : 0-200mV & 0-2000mV 6) Input Supply : User specified. default is AC 230V ± 10%
There are various models of this product – 10 V / 20 A, 5V / 50 A, 2 V / 100 A, 2 V / 200 A, 2 V / 400 A. In addition, the product can be PC based with the benefits such as graphical user interface, programmed current pump-in, and a time vs current vs millivolt drop curve.
The product is used to measure the millivolt drop at a high dc voltage or to assess the micro-ohms of an MCB. The measurement is important – the MCB should not drop more voltage and consume active power in real world. Also the test ascertains if the MCB contacts are properly manufactured in side the MCB to prevent unwanted drops. The tester can be used as a routine tester if the manufacturers desires for additional compliance and quality control.
