Static Monitor JCI 140:

• Compact, sensitive and easy to use 'field mill' instrument for non-contact measurement of surface voltage. Full scale sensitivities of 2,000 and 20,000 volts at 100 mm separation. 1V and 10V resolutions and zero stability. 3½ digit LCD shows surface voltages directly as kV with polarity and LO BATT indication. User settable audio alarm level. Analogue output of reading, sensitivity range and alarm state via 8 pin miniature DIN connector. Analogue output has a frequency response of -3dB at 120Hz. The instrument may therefore be used for monitoring 50/60Hz alternating electric fields using an external multimeter. Observations may be displayed and recorded using a paper chart recorder or a digital storage oscilloscope (e.g. a Picoscope). Opportunity for continuous operation with external power supply unit (12V 250mA isolated from earth) via 2.1mm d.c. connector in back cover. Supplied in carrying case with PP3 battery, signal cable, earth bonding cord and User Manual.

Static Monitor JCI 140F:

• Fast response version of JCI 140 above (-3dB at 400Hz, below 1ms response time) with operation by replaceable battery or external power supply unit. 8 pin miniature DIN input/output connector. Supplied with analogue output cable, earth bonding cord and User Manual.

Mains Power Supply Units JCI 142 for JCI 140 instruments: isolated 12V power supply unit for long term continuous operation of JCI 140, JCI 140F and JCI 178 instruments. Input connection via 2.1mm d.c. connector.

• JCI 142UK: 13A mains 'Wall Cube'
• JCI 142EU: European 2 pin mains socket
• JCI 142US: US mains socket

Analogue connecting lead JCI 143:

• Lead for connecting JCI 140 8w mini-DIN analogue output to oscilloscope BNC input (e.g. 'Picoscope' digital storage oscilloscope).

Mounting Blocks JCI 169:

• A pair of blocks for mounting JCI 140 instruments by the backplate for long term fixed in place monitoring applications. The blocks maintain access for 8w miniature DIN signal output connector and 2.1mm d.c. power supply.

Electrostatic Voltmeter JCI 148:

• A voltmeter adaptor for all JCI 140 instruments to enable voltages on conductors to be measured with no current drain. Useful to measure body voltages during activities. Input impedance around 10¹⁵ ohms to 20kV, 7 pF (30kV safety limit).

Faraday Pail JCI 147:

• An attachment for the JCI 140 range of Static Monitor instruments for sensitive and reliable measurement of charge on items, powders and liquids. Sensitivities of 2000pC and 20nC full scale with 1pC resolution on 2000pC range. The reading of the JCI 140 shows the charge directly in nC. Removeable shield cover and pail for easy emptying and cleaning. Moveable earthing contact for charge zeroing. 52mm dia 76mm tall pail in 150mm dia 152mm high shield. Overall unit size 180x180mm, baseplate 335mm high. Supplied with User Manual.

Faraday Pail JCI 150:

• A compact unit for measuring charge on small items and on powders and liquids. May be used in conjunction with a JCI 178 Charge Measurement Unit to provide sensitivities of 20nC and 200nC FSD. Baseplate diameter 130mm, overall height 95mm. Suitable for use within JCI 191 Controlled humidity Test Chamber. Supplied with user manual.

Faraday Pail JCI 247:

• A Faraday Pail unit for measuring the nett charge on sizeable items and on powders and liquids. 300mm diameter pail 490mm tall within an outer shield 410mm diameter 580mm tall. May be used in conjunction with a JCI 178 Charge Measurement Unit to provide sensitivities of 20nC and 200nC FSD.

Charge Measurement Unit JCI 178:

• Compact, battery powered instrument for measurement of small quantities of charge. 20nC and 200nC FSD sensitivity with resolution to 10pC on most sensitive range. Can optionally be supplied for 2nC and 20nC FSD operation or lower sensitivity. May be fitted with JCI 179 Discharge Probe for measurement of charge transfer in spark type discharges.

Discharge Probe JCI 179:

• Shielded discharge probe for measurement of current and charge transfer in spark type discharges. 25mm hemispherically ended probe with 3mm sensing probe tip. BNC connector for coax cable connection or direct mounting to JCI 178. (see user manual for JCI 178)

Faraday Pail Adaptor JCI 177:

• The charge received by the pail of a JCI 147 Faraday Pail unit can be measured with a JCI 178 Charge Measuring Unit using a JCI 177 adaptor disc. This gives sensitivities of 20nC and 200nC full scale with opportunity for remote electronic zeroing.

Zero Check Chamber JCI 152:

• A 200 mm diameter 250 mm high gold plated brass chamber for setting and checking zero of JCI 131 fieldmeters.

Earth Bonding Cord JCI 157:

• 'Durable Dot' and crocodile clip type terminations for easy earth bonding of JCI 140 Static Monitor and associated instruments. Coiled cable extendable to 2m with integral 2M resistors.

Adverse Conditions Electrostatic Fieldmeter JCI 131:

• A special 'field mill' electrostatic fieldmeter for precise measurement and reliable long term continuous monitoring of electric fields in adverse environmental conditions. Proprietary 'brushless' fieldmeter design with electronically commutated motor for long operational life. Autoranging and remote control of sensitivity setting with 2, 20, 200 and 2000 kV m-1 FSD. Power supply input 12-36V. 102mm dia 155mm long. Gold plated brass casing. May be mounted by threaded holes in back plate or by fitting to tube of 50mm diameter mounting pole (e.g. JCI 137). May be operated in conjunction with JCI 134 or JCI 234 Base Units. Supplied with User Manual.

Adverse Conditions Electrostatic Fieldmeter JCI 131F:

• A fast response version of the JCI 131 'field mill' electrostatic fieldmeter for precise measurement and reliable long term monitoring of quasi-continuous and mains frequency (50/60Hz) alternating electric fields in adverse environmental conditions. This is particularly appropriate for studies of electric fields near power line systems. The JCI 131F may conveniently be used in conjunction with the JCI 234 Base Unit to display and provide signal outputs for recording of the quasi-continuous and alternating electric field components. All performance features as for JCI 131 above. Autoranging takes account of maximum continuous as well as alternating electric field values. Can be used in conjunction with Operational Health Monitoring facility, JCI 133. Supplied with User Manual.

Integral Operational Health Monitor JCI 133:

• Additional circuits within JCI 131 fieldmeter to provide voltage modulation of shield around fieldmeter sensing head for continuous monitoring of instrument performance without interference to normal instrument operation. Output signals show operational health status.

Base Unit JCI 134:

• Provides mains or battery operation of JCI 131 fieldmeters with opportunity to use a battery for main or uninterruptible power supply operation. Display of fieldmeter reading and indicators for operational health status. 25w D type connector for external linkage to data display and recording of observations. User Manual incorporated within manual for JCI 131.

Base Unit JCI 234:

• When used with fast response version JCI 131F electrostatic fieldmeters the JCI 234 provides the opportunity to separate and measure and display both quasi-continuous electric fields and mains frequency (50-60Hz) electric fields. Provides mains or battery operation with opportunity to use a battery for main or uninterruptible power supply operation. Display of fieldmeter reading as quasi-continuous and mains frequency electric field componemts with indicators for operational health status. 25w D type connector for external linkage to data display and recording of observations.

Support Pole JCI 137:

• For mounting JCI 131 fieldmeter about 2m above local ground surface looking upwards. The support includes a separate base that can be driven into the ground, a 2m 50mm diameter stainless steel tube for JCI 131 mounting and an aperture at the base for the connecting cable to pass from inside the pole back to a monitoring base station (e.g. JCI 134). A flange ring near the top of the tube provides a ring of holes for securing stabilizing guy lines.

Lightning Warning System JCI 504: (Price according to customer requirements)

• A system to provide advance warning of the risk of local lightning on the basis of observations of local atmospheric electric field, radio noise (27kHz) and lightning impulse signal activity (2-200kHz). Combinations of measurements of these three parameters provide two levels of risk warning to enable action to be taken to protect personnel and equipment. The system comprises a Sensor Unit (based on a JCI 131 adverse conditions fieldmeter together with proprietary operational health monitoring facilities and radio detection circuits), a mounting pole that also acts as the radio antenna, and a Base Unit. The Base Unit includes signal processing circuits, a single board microcomputer (Arcom) for assessing observations and for displaying these on the Base Unit and on an LCD monitor with operational health status and assessed alarm level indication. Opportunity is provided for remote display of risk warning level. Operation by 110-250V mains supply with UPS backup. The JCI 504 user manual gives a full description of the system and its operation.
  (The JCI 504 system is an update of the JCI 501 system operating on St Kilda for the last 10 years and with the same displays).

Charge Decay Test Unit JCI 155v6:

• For assessing the electrostatic suitability of materials by measurement of charge decay and capacitance loading characteristics. The design of the JCI 155v6 instrument satisfies the requirements of BS 7506: Part 2: 1996 and IEC 61340-2-1.
  The JCI 155v6 uses a high voltage corona discharge to put a localised patch of charge on the surface to be tested with a fast response 'field mill' electrostatic fieldmeter to measure, without contact, the initial peak voltage created by the deposited charge and how quickly the surface voltage falls as t his charge migrates away. Measurements of the quantity of corona charge transferred, made with a JCI 176 operating in conjunction with the JCI 155v6, allow direct assessment of the 'capacitance loading' experienced by the deposited charge when deposited charge measurements are made using a JCI 176. Temperature and humidity conditions within the instrument are recorded for each test run.

  The special feature of the new JCI 155v6 instrument is that it includes an integral microprocessor so that all basic analysis, display and storage of charge decay curves is carried out by software within the instrument. The aim is to make normal instrument use very easy, but to have a wide range of options available for adjustment of test and analysis conditions when needed.

  Observations are stored to a CompactFlash memory card slotted directly into the instrument. The stored data can be transferred into a microcomputer running software JCI-Graph in Windows 95/98/2000/XP. The software provides for off-line analysis and display of results and for long term secure data storage. It generates a Spreadsheet table summarising test conditions and results obtained with the option to create .csv files from observations. This proprietary software also provides the capability for direct remote initiation of instrument operation with on-line analysis and display of results.

  Decay times can be measured from below 50ms up to millions of seconds and with initial peak surface voltages from below 50V up to about 3kV. Opportunity is provided for slow plate release to minimise air disturbance when studying fine powders with long charge decay times. Operation by integral 600mAh battery (over 4 hours) and by 115V/240V mains supply.

  Supplied in carrying case with mains power supply unit, JCI-Graphs oftware disc and with JCI 155v6 and JCI-Graph user Manuals.

Sample Support JCI 166:

• A metal box support to make it easy to present a test area of sheet and film materials to JCI 155 Charge Decay Test Unit for testing with either open shielded backing or an earthed backing.

Charge Measuring Sample Support JCI 176:

• To provide a simple flat mounting support for layer and fabric samples with direct and reliable measurement of the quantity of charge tranferred at corona charge deposition wi th JCI 155v4 and JCI 155v6 Charge Decay Test Unit instruments. Supplied with connection cable and User Manual.

Sample Support Plate JCI 173:

• Providing opportunity for measuring the charge decay characrteristics of powders and liquids with measurement of the quantity of charge transferred. The 40mm diameter brass cup of 3, 5 or 10mm depth (as specified) is mounted in a plate that locates between the plates of a JCI 176 Charge Measuring Sample Support.

Powder Sample Support JCI 170:

• Providing two defined test volumes (30mm dia 3mm deep and 50mm dia 5mm deep) on either side of a 140 mm dia 12mm thick aluminium support disc. This helps repeatable charge dissipation testing of powders with JCI 155v6 and JCI 155v4 instruments.

Support Plate JCI 172:

• For use with the JCI 170 Powder Sample Support when making measurements on light powders with JCI 155v4 and JCI 155v6 Charge Decay Test Units. The unit provides a simple stand-off of the powder surface from the JCI 155 test aperture to avoid risk of ingesting powder into the JCI 155 mechanics by air disturbance from movement of the air dam.

Calibrator Unit JCI 255:

• for formal measurement of charge decay time and voltage sensitivity performance features of JCI155v6 and JCI 155v4 Charge Decay Test Units. Provides opportunity for measurements of voltage sensitivity with calibrator plate voltages up to 1000V and decay time measurement performance at 0.1, 1, 10, 100 and 1000s. Supplied with capacitors and resistors pre-calibrated to National Standards with 12 months calibration validity. Supplied with Calibration Certificate traceable to Natioanl Standards and User Manual.

Charge Calibrator JCI 256:

• for formal calibration of charge measuremnt units such as the JCI 176 and the JCI 178 with virtual earth charge measurement input circuits. Provides defined quantities of charge selectable in 1nC steps from 1nC to 999nC. Accuracy within 1%. Supplied with Calibration Certificate traceable to Natioanl Standards and User Manual.

Controlled Humidity Test Chamber JCI 191:

• The Test Chamber (800 x 600 x 300mm) provides opportunity for measuring the charge dissipation capabilities of materials under defined conditions of humidity. Humidity can be controlled and measured from over 70% RH down below 15% RH. Control of temperature to +10C above ambient.

Controlled Humidity Test Chamber JCI 191C:

• A Test Chamber a s above but providing internal cooling as well as heating so that test temperatures within the chamber can be controlled from 10C above to 10C below ambient. Humidity control as for the standard JCI 191.

Dry Air Supply Unit JCI 192:

• The unit provides a convenient source of very dry air (-40C dewpoint) for continuous operation of the JCI 191 test chamber. The mains powered unit (240 V or 115V preset) is 435 x 335 x 130mm.(see also JCI 192 User Manual)

JCI-Graph:

• Windows' software to display up to 4 charge decay graphs at a time obtained by on-line and off-line operation of JCI 155v6 Charge Decay Test Units. Graphs and details of test conditions and results may be copied into wordprocessing applications. Operation is within a Windows 95/98/2000/XP environment. JCI-Graph software can also be used for post-processing data recorded by operation of JCI 155v4 instruments with DECAY18 software. It will also handle data r ecorded using a Picoscope digital storage oscilloscope.

DECAY18F:

• Proprietary MSDOS software for use with JCI 155v4 Charge Decay Test Unit and JCI 140C instruments in JCI 149 Charge Dissipation Test Units. Provides automatic display, storage and analysis of charge decay curves from instruments with communications interface. New version instruments (after Dec 1994) include software facilities for control of instrument operation with setting of corona voltage and duration and testing to file stored parameters for charging and analysis. NOTE that MSDOS operating system facilities are only available with Windows microcomputers up to and including Windows 98 - and no later.

Calibration Service:

• For JCI 140 Static Monitor instruments, for JCI 131 fieldmeters, for JCI 178 Charge Measurement Unit and for JCI 147 Faraday Pail and JCI 148 Electrostatic Voltmeter units. Also for JCI 101, 102A, 105A and 111 electrostatic fieldmeters.

• For JCI 1 55v4 and JCI 155v6 Charge Decay Test Units:

  Calibrations and re-calibrations use methods described in British Standard BS 7506: Part 2: 1996 Annex 'Methods for measurements in electrostatics'. Calibrations are based on measurements whose accuracy is traceable to NPL Standards. Calibration details on Calibration Certificate.

Servicing of JCI instruments

• We are happy to try to service and repair all JCI instruments. It must however be recognised that it may prove impractical or uneconomic to repair some older units.

Assessment of materials:

• The charge dissipation and 'capacitance loading' characteristics of materials can be tested for customers using a JCI 155v6 Charge Decay Test Unit. Testing can be carried out under controlled humidity conditions - from 60% down to below 15%RH and at controlled temperatures of 20-25C.

Consultancy

• To advise and help customers understand and overcome problems with static electricity

"An Introduction to Electrostatic Measurements" This booklet is based on the Notes that were prepared by John Chubb for the Introductory Workshops that have preceded the last three of the Institute of Physics 'Electrostatic Conferences'.

JCI Products and Services:

• The above list outlines the present range of JCI electrostatic instruments and options available. We continue to e nhance present products and develop new ones - so please contact us to discuss requirements and for descriptions of individual instruments. We will also be pleased to discuss any special measurement problems or needs for testing, investigation, development or consultancy work.

RoHS and WEEE Directives:

• JCI electrostatic measuring instruments are not required to conform to the RoHS Directive because they come within Category 9 exemption.
• To comply with the requirements of the WEEE Directive all JCI instruments at the end of their useful life should be returned to JCI to be disposed of in an environmentally appropriate manner.

Published papers:

• A list of papers and articles on electrostatics is given on the JCI Website. Copies of a number of recent papers are also presented there - see alsoJCI Newsletter for list of recent papers.

World-wide Sales 

We have distributors selling JCI instruments in a number of countries and JCI sells direct in all others. To place a direct order see JCI ordering details. Information about our instruments is available world-wide via the JCI Website.

Present distributors for JCI products are:

For Sweden, Denmark, Norway and Finland:

• Reinhold Rutks, Swedish Electro Static AB, Artemisgatan 24-26, S-115 42 STOCKHOLM, Sweden
  (Tel: +46 8 664 0590 Fax: +46 8 664 1223 email: reinhold.rutks@swedishelectrostatics.se Website: www.swedishelectrostatics.se)

For USA:

• Bill Vosteen, Monroe Electronics Inc, 100 Housel Avenue, LYNDONVILLE, NY 14098, USA
  (Tel: +1 585 765 2254 Fax: +1 585 765 9330 email: electrostatics@monroe-electronics.com) Website: http://www.monroe-electronics.com

For Taiwan:

• Hong Cheng Technologies Co., Ltd. 3F-5, No.26, Tai Yuen St., Chu-Pei City, Hsing-Chu Hsien, Taiwan Tai Yuen Hi-Tech. Industrial Park Tel: (03) 552-6071 Fax: (03) 552-6073 Website: http://www.hongcheng.com.tw email: hong7039@ms61.hinet.net

For China:

• Ms Jane Lin, Apcee Corporation, Room 2101, 2104, Houhai Building, Houhai Road, Shenzhen, China. (Tel: +86-755-8624 1291 Fax: +86-755-8624 1292 email: richard@apcee.com)

We reserve the right to change and upgrade specifications as a result of product development work. All JCI instruments are subject to a 12 month Warranty. Carriage and packing not included.