Can you tell me the differences between the PM700 Power Meter range ?

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The PM 700, PM700P, PM710 & PM750 all provide the following readings

Voltage of each phase, current in each phase
Real, active, apparent power per phase
Frequency, Power Factor
Active, apparent, relative energy (kWh, kVaR, kVArh)
Current demand, power demand
min /max of instantaneous readings
Voltage THD (Total harmonic Distortion)
Current THD(total Harmonic Distortion)

The PM700 is a 3 phase multi function meter with no RS485 Modbus communication and no pulsed outputs
The PM700P is a 3 phase multi function meter and has pulsed outputs but no RS485 Modbus communication
The PM710 is a 3 phase multi function meter and has RS485 Modbus communication and no pulsed outputs
The PM750 is a 3 phase multi function meter and has pulsed outputs and RS485 Modbus communication

Please note the PM700 range is now obsolete, for information on replacement please see FAQ FA264122