Fraser EX715 User manual

EX715
STATIC METER
OPERATING
INSTRUCTIONS

3
EX715 Iss.4
Contents Page
1 Introduction 4
2 Checking on Delivered Equipment 5
3 Characteristics of the Electric Field 6
4 Operating Instructions 7
5 Health & Safety 9
6 ATEX/IECx Operating Conditions 10
7 Maintenance 11
8 Calibration 11

4© Fraser An-Stac Techniques Ltd 2015
The EX715 Static Meter has been designed for the analysis of industrial static
electricity problems. It has been certified for use in some hazardous areas.
It is important that the instrument is used correctly. Please read the following
operang instrucons before use. Also please read the notes on the electric eld
overleaf which give useful guidelines when measuring stac electricity.
The EX715 Stac Meter is an invaluable tool in invesgang industrial stac
electricity problems. It is used throughout producon and quality control. It
helps the operator to analyse the problem sciencally. e.g.
• Find out how much stac is present?
• Establish standards of acceptability for stac levels in processes.
• Reject material if it is too stac generave.
• To see where and how the stac is being generated.
• To see if stac eliminators are eecve and if they are in the best posion.
1. Introduction
It is essential that you read and understand the complete manual before installing
and using this equipment. This is important for safety and for warranty cover.
1.1 Explanation of Symbols
Warning!
This symbol appearing in the operang instrucons refers to operaons which,
if carried out improperly, may result in serious personal injuries.
Cauon!
This symbol appearing in the operang instrucons refers to operaons which,
if carried out improperly, may result in damage to property.

5
EX715 Iss.4
The equipment leaves our factory in suitable protective packaging. Please check
that it is undamaged when it arrives. If there is visible damage contact the
factory or one of our distributors immediately. Check that the parts which have
been delivered are the same as you have ordered.
Documentation
The EX715 comes complete with carry case, Declaration of Conformity and
Calibration Certificate.
2. Checking on Delivered Equipment

6© Fraser An-Stac Techniques Ltd 2015
3. Characteriscs of the Electric Field
The electric field has unusual characteristics which should be understood when
making electrost atic measurements. These are noted below.
The electric eld lines of the stac charge radiate vercally from the object. But
they are easily distorted by adjacent machinery parts. When the material to be
measured is touching a part of the machine, such as a roller it is impossible to
make an accurate reading. This is shown in the sketch below.
Rule
For a true reading, measure the object when it is in free air and away from
machine parts. If this is not possible, accept that the display is under-measuring
the charge. This is an important
factor when taking readings in confined spaces. The material should never
be measured when touching another body. This phenomenon is easier to
understand if you charge a sheet of plastic by rubbing it. Then move the sheet
towards a wall, with the EX715 measuring the charge at all times. The reading
will be about zero when the sheet touches the wall, but will return to its previous
level when the sheet is moved away.
Characteristics of the Electric Field
The electric field has unusual characteristics which should be understood when making
electrostatic measurements. These are noted below.
The electric field lines of the static charge radiate vertically from the object. But they are easily
distorted by adjacent machinery parts. When the material to be measured is touching a part of
the machine, such as a roller it is impossible to make an accurate reading. This is shown in the
sketch below.
Rule:
For a true reading, measure the object when it is in free air and away from machine parts. If this is
not possible, accept that the display is under-measuring the charge. This is an important
factor when taking readings in confined spaces. The material should never be measured when
touching another body.
This phenomenon is easier to understand if you charge a sheet of plastic by rubbing it. Then
move the sheet towards a wall, with the EX715 measuring the charge at all times. The reading will
be about zero when the sheet touches the wall, but will return to its previous level when the sheet
is moved away.
Operating Instructions
The earth lead must be used to connect the instrument to a suitable grounded point during
operation. This prevents charge building up in the instrument and distorting the reading, or

stud should be connected to a suitable earth, such as a bare metal part of the machine.
1. Hold EX715 in the palm of hand, point it away from the charge and click the button once to
turn ON. This sets the zero level for readings, so it must be pointing away from the charge
when the button is clicked.
2. Hold the instrument 100mm from the object to be measured and observe the reading on
the LCDdisplay. It shows the surface voltage of the static charge in kilovolts. he polarity of
the charge is positive unless a negative sign is shown on the display.
3. Click the button again to HOLD the reading. When the reading is on HOLD it blinks/ flashes.
4. To take another measurement, re-zero the instrument by clicking the button when it is
pointing into free air away from the charge. The HOLD function stops and the EX715 is
ready to take another reading.
5. The EX715 turns itself OFF automatically after about 60 seconds.
6. Do not take a measurement within 300mm of a static eliminator, as the ionised air will
distort the reading.
7. Replace the 9V PP3 battery when “Battery Low” indicator shows on display. Access is
through the removable plate in the bottom of the instrument. For battery type see next page.
Film
Field becomes coupled to
roller and distorted
Field Lines
Field returns when film
leaves roller
Instructions/Booklet/EX715 iss 4 5

7
EX715 Iss.4
The earth lead must be used to connect the instrument to a suitable grounded
point during operation. This prevents charge building up in the instrument and
distorting the reading, or causing a discharge. The ring end is clipped to the
bottom of the meter; the crocodile clip/4mm stud should be connected to a
suitable earth, such as a bare metal part of the machine.
1. Hold EX715 in the palm of hand, point it away from the charge and click the
button once to turn ON. This sets the zero level for readings, so it must be
pointing away from the charge when the button is clicked.
2. Hold the instrument 100mm from the object to be measured and observe
the reading on the LCDdisplay. It shows the surface voltage of the stac
charge in kilovolts. he polarity of the charge is posive unless a negave
sign is shown on the display.
3. Click the buon again to HOLD the reading. When the reading is on HOLD
it blinks/ ashes.
4. To take another measurement, re-zero the instrument by clicking the buon
when it is poinng into free air away from the charge. The HOLD funcon
stops and the EX715 is ready to take another reading.
5. The EX715 turns itself OFF automacally aer about 60 seconds.
6. Do not take a measurement within 300mm of a stac eliminator, as the
ionised air will distort the reading.
7. Replace the 9V PP3 baery when “Baery Low” indicator shows on display.
Access is through the removable plate in the boom of the instrument. For
baery type see next page.
4. Operang Instrucons

8© Fraser An-Stac Techniques Ltd 2015
4. Operang Instrucons
Typical static levels:
1000V acve dust aracon begins
3000V aracon of light materials e.g. 20µ lm
6000V aracon of heavier lm and papers & hairs on back of hand
move, danger level in many hazardous areas
10,000V lm wraps around rollers in coang & gravure prinng etc.
and severe dust aracon
The EX715 measures the surface voltage in V or kV. A common queson is
“What is the relaonship between surface voltage and eld strength?” The
relaonship is:
Surface voltage in V = eld strength in V/meter x distance from object in
meters
Range:
The EX715 has two ranges which are selected automacally:
• Up to ±20kV the resoluon is 10V
• From ±20kV to ±200kV the resoluon is 100V.
Battery Options
Important: The hazardous area cercaon of the EX715 is only valid if
the following baeries are used. The choice of baery will also dictate the
maximum ambient temperature in which the instrument can be used.
Duracell Industrial MN1604
Duracell Coppertop MN1604 gives the instrument a T4 rang with an
ambient temperature Ta ≤ +59ºC
Panasonic 6F22R gives the instrument a T5 rang with ambient
temperature Ta ≤ +40ºC]

9
EX715 Iss.4
5. Health & Safety
This equipment is only suitable for Zone 1 and 2.
WARNING Do not open the EX715 to replace the baery or for any other
reason when in a hazardous area.

10 © Fraser An-Stac Techniques Ltd 2015
6. ATEX / IECEx Operang Condions
The EX715 has been certified for use in some hazardous areas. This section details
the scope of this certification with explanatory notes.
Mark of Protecon: II 2 G Ex ia IIB T4/T5
II ………… Industrial equipment.
Electrical apparatus for places with an explosive gas
atmosphere other than mines suscepble to redamp.
2 …… Equipment category: high protecon. Suitable Zone I and II.
G …… Equipment used in potenally explosive atmospheres
caused by presence of explosive gas, vapour and mist.
Ex …… Explosion protecon.
ia …… Intrinsically safe.
IIB …… Representave gas group.
T4 / T5 …… Temperature class.
When Duracell Procell or Duracell Coppertop MN1604
is used the equipment is rated T4 with an ambient
temperature -20 ≤ Ta +59ºC.
When Panasonic 6F22R is used the equipment is rated
T5 with an ambient temperature -20 ≤ Ta ≤ +40ºC.
Approval numbers: Europe: Baseefa 07ATEX0159 Internaonal: IECEx
BAS07.0042

11
GB
EX715 Iss.4
7. Maintenance
8. Calibraon
The charge plate in the top of the meter should be kept clean. It is important to keep this
area free from dust and u, and must not be touched in operaon, as this will aect the
reading.
Apart from replacing the baery, there are no user serviceable parts inside the EX715. If
there is a malfuncon it should be returned to the manufacturer. The guarantee is void if
the instrument is taken apart.
The EX715 is calibrated as standard using a 150mm x 150mm or other sized plate. If the
instrument is used in hazardous areas then we recommend an annual recalibraon.
If you need further informaon about stac electricity problems, please contact the
manufacturers or authorised distributors.

Scos Business Park, Bampton, Devon, GB, EX16 9DN
T + 44 (0) 1398 331114 F + 44 (0) 1398 331411
E sales@fraser-anstac.co.uk W www.fraser-anstac.com
EX715 OI - Iss.4 - EN
For more informaon about stac and to view the full range
of our products, please visit www.fraser-anstac.com