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John Chubb
Instrumentation
________________________________________________________________________________________
USER MANUAL: JCI 134 Base Unit
for JCI 131 Electrostatic Fieldmeter
UM134 - Issue 1: July, 2004
Contents:
Figures
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Unit 30, Lansdown Industrial Estate, Gloucester Road,
Cheltenham, GL51 8PL, UK. Tel: +44 (0)1242 573347
Fax: +44 (0)1242 251388 email: jchubb@jci.co.uk
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Table of Contents
Summary of Contents for JCI 134
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Page 1: Table Of Contents
Unit 30, Lansdown Industrial Estate, Gloucester Road, Cheltenham, GL51 8PL, UK. Tel: +44 (0)1242 573347 Fax: +44 (0)1242 251388 email: jchubb@jci.co.uk ________________________________________________________________________________________ USER MANUAL: JCI 134 Base Unit for JCI 131 Electrostatic Fieldmeter UM134 - Issue 1: July, 2004 Contents: 1. - Page 2 John Chubb, proprietor of John Chubb Instrumentation of Unit 30, Lansdown Industrial Estate, Gloucester Road, Cheltenham, GL5l 8PL, declares as designer and manufacturer, that the JCI 131 electrostatic fieldmeter conforms to the requirements of the EC Directive on Electromagnetic Compatibility (EMC) 89/33/EEC to Standards EN 50081-1:1992 and EN 50082-1:1992.
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Page 3: Introduction
1. INTRODUCTION JCI 131 fieldmeters may be operated in conjunction with a JCI 134 Base Unit to provide mains or battery operation and display of electric field measurements and indication of operational health status. The JCI 131 fieldmeter sensing head unit is shown in Figures 2 and The JCI 134 provides opportunity to use both a mains input power supply with a battery connected at the same time for uninterruptible operation in the event of mains supply failure. -
Page 4: Operational Features
ON/OFF switch and fuse and a number of adjustment facilities. Figure 1 shows the layout of the top panel of the JCI 134. The small LEDs along the lower edge of the top cover indicate power supplies actively available. A separate LED shows when the JCI 131 is powered on by clockwise rotation of the key operated power supply switch at the right hand end of the back cover. -
Page 5: Power Supply Requirements
If the operational health facility is fitted to the JCI 131 fieldmeter head unit [1] then LEDs on the top cover indicate the operastional health status. The operastional health may be toggled on and off using the key switch, and an LED indicates while the facility is activated. -
Page 6: Setting Up
6. SETTING UP 6.1 Basic set up Connect the cable from the JCI 131 sensing head to the 19w connector on the JCI 134 Base Unit. Connect either a mains power supply or a 12V battery (positive center connection) to either 2.1 d.c. -
Page 7: Operational Health Nonityoring
600V p-p for the low sensitivity range. The operational health status is displayed on the JCI 134 is two ways: first, the level of the operational drive signal (‘Health drive’) is compared to its target value (1.0V) and if it is less than 90% of this then the key amber LED is illuminated. -
Page 8: Applications
An operating range is suggested of 0-30C and 20-100%RH including direct rain precipitation into the sensing aperture. There is no reason why the JCI 131 will not operate satisfactorily below 0C purely in terms of ambient temperature If there is a prospect of snow or freezing... - Page 9 Figure 1: Top cover layout for JCI 134 Base Unit Page - 8 Page - 8...
- Page 10 Figure 2: General view of JCI 131 Electrostatic Fieldmeter Figure 3:Internal features of JCI 131 Page - 9...
- Page 11 Figure 4: JCI 131 fieldmeter mounted for measurement of atmospheric electric fields Page - 10...
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