CSS_02-3259A_Phase_Angle_Voltmeter.pdf

CALIBRATION STANDARDS SPECIFICATION

PROCUREMENT PACKAGE

PHASE ANGLE VOLTMETER

DEPARTMENT OF THE NAVY

METROLOGY AND CALIBRATION PROGRAM

CSS 02-3259A

17 JAN 2018

CALIBRATION STANDARDS SPECIFICATION

PROCUREMENT PACKAGE

PHASE ANGLE VOLTMETER

Prepared by:

Microwave/Electro-Optic Standards (MS 32)

Measurement Science Department

Naval Surface Warfare Center, Corona Division

P.O. Box 5000

Corona, CA 92878-5000

DEPARTMENT OF THE NAVY

METROLOGY AND CALIBRATION PROGRAM

PHASE ANGLE VOLTMETER CALIBRATION STANDARD SPECIFICATION CSS 02-3259A

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Table of Contents

1.0 SCOPE

1.1 General

1.2 Usage

2.0 REQUIREMENTS

2.1 Electrical Power Sources and Connections

2.2 Environmental Requirements

2.3 Performance Requirements

1.0 SCOPE

1.1 General. This document specifies the minimum requirements for a phase angle voltmeter. This equipment shall be of commercial design. It is intended to be used by Navy personnel in shipboard and shore-based laboratories and for on-site, in-place calibration. The equipment will be used primarily on bench top applications to calibrate various test instruments such as synchro/resolver and test sets.

1.2 Usage. Equipment covered by this CSS is intended for use in testing equipment and systems in the worldwide controlled environments in which military equipment is operated. Equipment will also be subjected to conditions aboard land, sea, and air vehicles, both military and commercial, during periods of transportation and storage.

2.0 REQUIREMENTS

2.1 Electrical Power Sources and Connections.

2.1.1 Nominal and Alternate Power Source. The phase angle voltmeter shall operate at:

a. 120 Vrms

b. Single-phase 50 and 60 Hz

2.2 Environmental Requirements.

2.2.1 Temperature Not Operating. The phase angle voltmeter shall conform to the specified performance and accuracy requirements after being stored at temperature ranging from -20 ºC to 60 ºC.

2.2.2 Temperature Operating. The phase angle voltmeter shall conform to the specified performance and accuracy while operating in temperature ranging from 15 ºC to 30 ºC.

2.2.3 Humidity. The phase angle voltmeter shall conform to the specified performance and accuracy in the condition where the relative humidity is 20% to 50%.

2.3 Performance Requirements.

2.3.1 Measurement Types. The phase angle voltmeter shall be able to measure Total, Fundamental, Harmonics, In-phase, Quadrature, Frequency, Ratio, Null, and Phase Angle.

2.3.2 Input Channels. The phase angle voltmeter shall have a minimum of two isolated input terminations, reference and signal. The input shall have the following characteristics:

a. Connector Type: Corrosion resistance and clean.

b. Input Impedance: The input impedance shall be 600 kΩ, minimum.

2.3.3 Voltage Input Ranges: 50 mVrms to 300 Vrms, minimum with accuracy of 2.30% of input value or better.

2.3.4 Current Shunt. The phase angle voltmeter shall offer a compatible current shunt rated up to 20 A with phase accuracy of ±0.08° or better.

a. The current shunt shall be internal to the equipment as an optional function inline with one of the signal input channels or a separate input channel.

2.3.5 Phase Input Range: 0.00° - 359.99° or ±179.99° with accuracy of ±0.08° for frequencies 45 Hz to 1 kHz and ±0.10° for frequencies 1 to 24 kHz or better.

The phase measurement repeatability shall be ±0.02° or better.

2.3.6 Null Meter. The phase angle voltmeter shall be able to perform AC voltage null measurement with the following accuracy:

a. Nulling Sensitivity of 1 µV.

b. Total Mode Noise of 35 µV.

2.3.7 Frequency Ranges: 45 Hz to 24 kHz, minimum.

2.3.8 Display Requirements. The display shall display results from all the measurement types listed in 2.3.1 with the following resolutions:

a. Voltage. 4 1/2 digits, minimum.

b. Phase. 5 digits, minimum.

2.3.9 Phase offset. The phase angle voltmeter shall allow the user to enter a phase offset.

2.3.10 Range Selection. The phase angle voltmeter shall have autoranging and a manual range selection function on the front panel. The selected ranged shall be visible on the front panel.

2.3.11 Interface. The phase angle voltmeter shall have a GPIB (IEEE-488) communication interface for external programming and control.