Customer Application Support

We are seeking a highly skilled Application Engineer with strong expertise in energy metering technologies, including developing metrology (single & three phase) , DLMS/COSEM protocol, and energy meter hardware architecture.

Education

Bachelors degree in electrical engineering, Electronics, Instrumentation, or related fields. Masters degree is a plus.

Key Skill set:

Strong Understanding of Electrical Measurement Principles:

• Fundamentals of AC power measurement (singlephase & threephase)
• RMS calculations for voltage, current, power & energy
• Concepts of active, reactive, apparent power
• Power factor measurement (displacement & distortion PF)
• CT/PT interfacing, burden selection, linearity, and phaseangle correction
• Antitamper metering concepts (neutral disturbance, magnetic tamper, bypass detection)

Expertise in Metrology Algorithms

• Implementation of sampling, digital filtering, and signal conditioning
• Frequency tracking & phaselocked loop (PLL) algorithms
• Compensation techniques for:
• Gain & offset errors
• Phase angle errors
• Temperature drift
• Energy calculation algorithms (block processing, timedivision sampling, etc.)
• Lowsignal detection, creep handling, and startup threshold logic

ADC & Sensor Interface Knowledge

• Experience with (SigmaDelta) ADCs, multichannel highresolution converters
• Understanding sampling rate, aliasing, ENOB, quantization noise
• Design and calibration of current sensors:
• Shunts
• CTs
• Rogowski coils
• Hall sensors
• Noise isolation, grounding, and analog frontend design

DLMS/COSEM Knowledge (for Smart Meters)

While metrology is separate from DLMS, a metrology engineer should understand how measured parameters map to communication standards:

• OBIS code mapping for power & energy registers
• COSEM interface objects related to billing, load profiles, events
• Security suites (Suite 0 / Suite 1 / Suite 2)
• Interoperability testing with HES/MDM
• DLMS data structures for profile capture & metering blocks

Calibration & Accuracy Testing

• Handson experience with meter test benches (ZERA, Radian, Secure, L&T)
• Multipoint calibration techniques:
• Voltage, current, phase angle, power factor
• Accuracy standards:
• IS 16444 (Smart Meters)
• IS 15959 (DLMS)
• IEC 6205321/22/23
• Endurance, creep, tamper, harmonic, and influence quantity testing