电磁计量标准-分析测试百科网

JJG(邮电) 036-1997 射频通信测试仪检定规程

Verification Regulations for Radio Frequency Communication Tester

ICS
CCS: A55
发布: 1997
实施

ASTM G59-97(2009) 动电势极化电阻测量的标准试验方法

This test method can be utilized to verify the performance of polarization resistance measurement equipment including reference electrodes, electrochemical cells, potentiostats, scan generators, measuring and recording devices. The test method is also useful for training operators in sample preparation and experimental techniques for polarization resistance measurements. Polarization resistance can be related to the rate of general corrosion for metals at or near their corrosion potential, Ecorr. Polarization resistance measurements are an accurate and rapid way to measure the general corrosion rate. Real time corrosion monitoring is a common application. The technique can also be used as a way to rank alloys, inhibitors, and so forth in order of resistance to general corrosion. In this test method, a small potential scan, ΔE(t), defined with respect to the corrosion potential (ΔE = E – Ecorr), is applied to a metal sample. The resultant currents are recorded. The polarization resistance, RP, of a corroding electrode is defined from Eq 1 as the slope of a potential versus current density plot at i = 0 (1-4): The current density is given by i. The corrosion current density, icorr, is related to the polarization resistance by the Stern-Geary coefficient, B. (3), The dimension of Rp is ohm-cm 2, icorr is muA/cm2, and B is in V. The Stern-Geary coefficient is related to the anodic, ba, and cathodic, bc, Tafel slopes as per Eq 3. The units of the Tafel slopes are V. The corrosion rate, CR, in mm per year can be determined from Eq 4 in which EW is the equivalent weight of the corroding species in grams and ρ is the density of the corroding material in g/cm3. Refer to Practice G 102 for derivations of the above equations and methods for estimating Tafel slopes. The test method may not be appropriate to measure polarization resistance on all materials or in all environments. See 9.2 for a discussion of method biases arising from solution resistance and electrode capacitance.1.1 This test method covers an experimental procedure for polarization resistance measurements which can be used for the calibration of equipment and verification of experimental technique. The test method can provide reproducible corrosion potentials and potentiodynamic polarization resistance measurements. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory ......

Standard Test Method for Conducting Potentiodynamic Polarization Resistance Measurements

ICS: 17.220.20 (Measurement of electrical and magnetic
CCS: A55
发布: 1997
实施

JJG 622-1997 绝缘电阻表(兆欧表)检定规程

Verification Regulation of Megohm-meter

ICS
CCS: A55
发布: 1997
实施: 1998-05-01

BS EN 50113:1996 测量,控制,调节.电温度传感器.热电偶用绝缘管

This standard applies to ceramic insulating tubes for use with thermocouples.

Measurement, control, regulation - Electrical temperature sensors - Isolating tubes for thermocouples

ICS: 17.200.20
CCS: A55
发布: 1996-11-15
实施: 1996-11-15

AWS FACT SHEET NO. 17-1996 电磁辐射(EMF)

Electric and magnetic fields are often referred to as “electromagnetic fields,” or EMF. There is concern that EMF may affect your health.

Electric and Magnetic Fields (EMF)

ICS: 17.220.20
CCS: A55
发布: 1996-01-01
实施

JJG 588-1996 冲击峰值电压表检定规程

Verification Regulation of Impulse Peak Voltmeter

ICS
CCS: A55
发布: 1996
实施: 1997-03-01

JJG 153-1996 标准电池检定规程

Verification Regulation of Standard Cell

ICS
CCS: A55
发布: 1996
实施: 1997-06-01

JJG 496-1996 工频高压分压器检定规程

Verification Regulation of High Voltage Divider at Power Frequency

ICS
CCS: A55
发布: 1996
实施: 1997-03-01

ANSI/IEEE 1460:1996 准静态磁场和电场的测量导则

Provides a listing of possible measurement goals related to characterizing quasi-static magnetic and electric fields and possible methods for their accomplishment.

Guide for the Measurement of Quasi-Static Magnetic and Electric Fields

ICS: 17.220.20
CCS: A55
发布: 1996
实施

IEEE 4-1995 高压测试技术

This standard is applicable to: (a) Dielectric tests with direct voltages, (b) Dielectric tests with alternating voltages, (c) Dielectric tests with impulse voltages, (d) Tests with impulse currents, (e) Tests with combinations of the above, and (f) Capacitanceand dielectric loss measurements. This standard is applicable only to tests on equipment having its rated voltage above 100 volts.

Standard Techniques for High-Voltage Testing Amendment 4a: 03/17/2001