Three Phase Reference Standard CL3115

Reference Standard Meter CL3115, front view

Reference Standard Meter CL3115, rear view

This reference standard has accuracy class 0.02 related to apparent power
It can be used for

voltage measurement
current measurement
phase angle measurement
frequency measurement
harmonics analysis up to the 63^th
power measurement, active-, reactive-, apparent
self consumption measurements
accuracy error calculations stand-alone with one pulse input socket, or together with error calculators in stationary test benches
register tests

Specifications

Specifications Reference Standard CL3115-HW, Mains connection

Item	Values
Voltage	85 V to 265 V AC
Frequency	45 Hz to 65 Hz
Power consumption	< 30 VA
Preheating time	15 minutes
Operating temperature	5°C to 45°C
Max. relative humidity	≤ 85%, not condensate
Surge voltage protection	class C
Installation category	III
Pollution degree	2
Weight	approx. 13 kg
Dimensions	19" 3 units, H x W x D: 132,5 mm x 483 mm x 405 mm

Specifications Reference Standard CL3115-HW, measurement values

Item	Values
Test voltage, phase-neutral	30 V to 576 V
Voltage ranges	60 V, 120 V, 240 V, 480 V, auto range
Test current	1 mA to 120 A
Current ranges	10 mA, 20 mA, 50 mA, 0.1 A, 0.2 A, 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A, 50 A, 100 A, auto range
Frequency range, fundamental wave	40 Hz to 70 Hz
Bandwidth	4 kHz
Voltage measurement accuracy	< 0.01%
Voltage measurement drift	< 35 ppm/year
Current measurement accuracy < 25 mA	< 0.02%
Current measurement accuracy ≥ 25 mA	< 0.01%
Current measurement drift	< 65 ppm/year
Power measurement accuracy P, Q, S	< 0.02% (current ≥ 25 mA and λ = 1)
Power measurement drift	< 100 ppm/year
Phase angle	< 0.01° (current ≥ 25 mA and voltage > 30 V)
Frequency	0.005 Hz
Voltage temperature drift	< 2,5 ppm/K
Current temperature drift	< 5 ppm/K
Power temperature drift	< 7.5 ppm/K
Errors are independent of measurement mode and when using auto range. The reference standard provides a power proportional frequency output (160 kHz nominal).

Meter Constant Table

CL3115 power constants
	60 V	120 V	240 V	480 V
0.01 A	2 x 10⁹	2 x 10⁹	2 x 10⁹	2 x 10⁹
0.02 A	2 x 10⁹	2 x 10⁹	2 x 10⁹	2 x 10⁹
0.05 A	2 x 10⁹	2 x 10⁹	2 x 10⁹	2 x 10⁹
0.1 A	2 x 10⁹	2 x 10⁹	2 x 10⁹	2 x 10⁹
0.2 A	2 x 10⁹	2 x 10⁹	2 x 10⁹	2 x 10⁹
0.5 A	2 x 10⁹	2 x 10⁹	1.6 x 10⁹	8 x 10⁸
1 A	2 x 10⁹	1.6 x 10⁹	8 x 10⁸	4 x 10⁸
2 A	1.6 x 10⁹	8 x 10⁸	4 x 10⁸	2 x 10⁸
5 A	6.4 x 10⁸	3.2 x 10⁸	1.6 x 10⁸	8 x 10⁷
10 A	3.2 x 10⁸	1.6 x 10⁸	8 x 10⁷	4 x 10⁷
20 A	1.6 x 10⁸	8 x 10⁷	4 x 10⁷	2 x 10⁷
50 A	6.4 x 10⁷	3.2 x 10⁷	1.6 x 10⁷	8 x 10⁶
100 A	3.2 x 10⁷	1.6 x 10⁷	8 x 10⁶	4 x 10⁶

The table refers to the automatic settings. It's valid for 3 wire- and 4 wire measuring mode.

The output frequency for end of range in voltage/current pair with three phase connection is 160 kHz. The power pulses are on TTL/CMOS level. The burden capacity is > 20 mA.

Calculation formulas

Frequency

Constant

The meter constants can be set in the settings menu or selected automatic. Setting range is 1 i / kWh to 2 x 10⁹ i / kWh.

Screenshots

The equipment can be operated manually with menu keys or via RS-485 remote control. A interface description for integration into 3^rd party meter test equipment is available on request. Below are some screen-shots

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