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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT
1404 Series
Primary Capacitance Standard
Operation Manual
Copyright © 2022 IET Labs, Inc.
Visit www.ietlabs.com for manual revision updates
1404 im/May 2022
www.ietlabs.com
IET LABS, INC.
Email: info@ietlabs.com
TEL: (516) 334-5959 • FAX: (516) 334-5988
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Summary of Contents for IET Labs 1404 Series
- Page 1 ¨ ¨ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT 1404 Series Primary Capacitance Standard Operation Manual Copyright © 2022 IET Labs, Inc. Visit www.ietlabs.com for manual revision updates 1404 im/May 2022 www.ietlabs.com IET LABS, INC. Email: info@ietlabs.com TEL: (516) 334-5959 • FAX: (516) 334-5988...
- Page 2 ¨ ¨ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT www.ietlabs.com IET LABS, INC. Email: info@ietlabs.com TEL: (516) 334-5959 • FAX: (516) 334-5988...
- Page 3 WARRANTY We warrant that this product is free from defects in material and workmanship and, when properly used, will perform in accordance with applicable IET specifi cations. If within one year after original shipment, it is found not to meet this standard, it will be repaired or, at the option of IET, replaced at no charge when returned to IET.
- Page 4 Safety Symbols General defi nitions of safety symbols used on the instrument or in manuals are listed below. Caution symbol: the product is marked with this symbol when it is necessary for the user to refer to the instruction manual. Hazardous voltage symbol: the product is marked with this symbol when high voltage maybe present on the product and an electrical shock hazard can exist.
- Page 5 To avoid the danger of introducing additional hazards, do not install substitute parts or perform unauthorized modifi cations to the instrument. Return the instrument to an IET Labs for service and repair to ensure that safety features are maintained in operational condition.
- Page 6 WARNING OBSERVE ALL SAFETY RULES WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES. Dangerous voltages may be present inside this instrument. Do not open the case Refer servicing to qualifi ed personnel HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT WHENEVER HAZARDOUS VOLTAGES (>...
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Page 7: Table Of Contents
Contents Chapter 1 Introduction ................1 1.1 Description of the 1404 Series ................1 Chapter 2 Specifi cations ................2 Specifi cations ........................ 2 Chapter 3 Operation ..................5 3.1 Initial Inspection and Setup .................. 5 3.2 Connections to Capacitor ..................5 3.3 Temperature Coeffi cient ..................5 3.4 Temperature Cycling ..................... -
Page 9: Chapter 1 Introduction
1404 Series Chapter 1 INTRODUCTION 1.1 Description of the 1404 Series The 1404 Series (Figure 1-1) are stable, pri- mary laboratory pacitance standards. They are working and laboratory standards grade. The 1404 units are available in values ranging from 10 pF to 10 nF with custom values available. -
Page 10: Chapter 2 Specifi Cations
1404 Series Chapter 2 SPECIFICATIONS For convenience to the user, the pertinent specifi cations are given in a label, shown in Figure 2-1 affi xed to the case of the instrument. SPECIFICATIONS Calibration: An A2LA certifi cate of calibration is supplied with each capacitor, giving the measured direct capacitance at 1 kHz, 30 Vac and 23°... - Page 11 1404 Series STANDARD REFERENCE CAPACITOR Model 1404-A 1000 pF Calibration: At 1 kHz, 1.5 Vac, at 23 Stability: Long term drift is less than 20 ppm per year, typically much smaller. Maximum change with orientation is 10 ppm and is completely reversible.
- Page 12 1404 Series Specifi cations...
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Page 13: Chapter 3 Operation
1404 Series Chapter 3 OPERATION Equivalent circuit showing direct capacitance, C D , 3.1 Initial Inspection and Setup and average values of residual inductance, L, and terminal capacitances, C H and C L . See specifi ca- This instrument was carefully inspected before ship- tions for values of residuals ment. -
Page 14: Temperature Cycling
1404 Series 3.4 Temperature Cycling Additional information on the design of the 1404 can be found at; The 1404 series can be used over a wide temperature https://www.ietlabs.com/pdf/GR_ range however it is important to understand that Experimenters/1963/GenRad_Experimenter_ hysteresis (retrace) can cause errors of up to 20 ppm. -
Page 15: Chapter 4 Maintenance
4.2.1 Calibration Interval The recommended 1404 Series calibration interval is twelve (12) months. The calibration procedure may be carried out by the user if a calibration capability is available, by IET Labs, or by a certifi... -
Page 16: Calibration With Genrad 1620 Or Ah2500A
1404 Series 4.3 Calibration Procedure with GenRad 1620 or AH2500A/ AH2700A Capacitance Bridge To calibrate an 1404 unit, proceed as follows: 1. 1404 capacitors with bnc connectors should have the shield disconnected at the HI termi- nal to minimize stray capacitance. The shield on the LO terminal should be maintained. -
Page 17: Replaceable Parts List
1404 Series 4.4 Replaceable Parts List There are no replaceable parts on the 1404 Series. Contact IET Labs at for an RMA should service be required at: https://www.ietlabs.com/ Maintenance...
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