Holley mME DTZ541 - Test-LED; Notes on Measurement Accuracy

User Manual LoRaWAN mME DTZ541 Three-phase electricity meter
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Features
Explanation
Mechanical environmental
conditions
M1
Electromagnetic
environmental conditions
E2
Protection class
IP51
Relative humidity
95% non-condensing, <75% annual mean according to
IEC 62052-11, EN 50470-1 and IEC 60068-2-30
Temperature range
-25 ° C ... + 55 ° C (operation)
-40 ° C ... + 70 ° C (storage)
lifespan
20 years
User protection
2 security options for seal
Terminal block
DIN 43857 part 2
Clamps ∅
9,5mm
casing material
Glass fiber reinforced polycarbonate
Size
290,5 mm (L) * 170 mm (W) * 52,5 mm (H)
Weight
720g
4.1 Test-LED
The test LED of the DTZ541 illuminates the infrared light. It is used to output energy-proportional
active energy pulses and to display start-up and idling. When idling, the test LED lights up
continuously. If the meter measures above its start-up threshold, the energy-proportional pulses are
displayed. The accuracy of the DTZ541 is determined by the LED pulse outputs.
4.2 Notes on measurement accuracy
Only the specified meter types with the associated software version numbers are permitted for use of
the LMN interface in accordance with calibration law. For this purpose, the respective approved
software versions must be observed. The measured value data have a resolution of 4 decimal places.
All parties involved must ensure that the requirements from PTB-A 50.8, Appendix A3 for latency
times and applicable tariff application cases are complied with, also taking into account several
communication adapters connected to a smart meter gateway.