Takk 5740 Operating Instructions Manual

Model 5740 static Meter

operating instructions

The 5740 Static Meter has been designed for the accurate analysis of industrial static electricity problems.
It is important that the instrument is used correctly. Please read the following operating instructions and

notes on the electric eld which give useful guidelines when measuring static electricity.

OPERATING INSTRUCTIONS

The earth lead should be used to avoid the charge in the human body affecting the readings. The ring end is

clipped to the bottom of the meter; the crocodile clip should be connected to earth, such as a bare metal part
of the machine.

(1) Press blue button to zero display and take reading. Meter should be pointed at the object to be

measured and reading taken when the top probe is 4" away. Please note that readings should
not be taken close to electrical static eliminators or other generators of ionized air, which distorts
the reading.

(2) Press button again to "hold" reading. Press again to resume readings. Automatic shut-off after

60 seconds.

(3) The display shows the potential of the charge in kV to 1 decimal place. The maximum reading

is 200kV. The polarity is positive unless a negative sign is shown on the display.

(4) Please replace 9V PP3 battery when “Battery Low” indicator shows on display.

MAINTENANCE

The charge plate in the top of the meter should be kept clean. It is important to keep this area free from
dust and other contaminants, and must not be touched in operation, as this will affect the reading.

Apart from the battery compartment, there are no user serviceable parts inside the 5740. If there is a
malfunction it should be returned to the manufacturer. The guarantee is void if the instrument is taken apart.

CALIBRATION

The stability of the electronics in the 5740 means that recalibration is not usually needed unless the

customer’s quality system requires it. TAKK offers a recalibration service. Alternatively an outside
calibration service can be used.

The 5740 is calibrated according to:

 EOS/ESD 3 Standard using a 150 x150mm charge plate



OR

 BS 7506-2 using a 500mm x 500mm charge plate



CHARACTERISTICS OF THE ELECTRIC FIELD

The electric eld has unusual characteristics, which should be understood when making electrostatic

measurements. These are noted below.

The electric eld lines of the static charge radiate vertically from the object. But they are easily distorted by

adjacent machinery parts. This is shown in the sketch below.

eld lines

lm

For a true reading, try to measure the object when it is in free air and away from machine parts. If this

Rule:

eld becomes coupled

to roller and distorted

eld returns when
lm leaves roller

lm

is not possible, accept that the display is under-measuring the charge. This is an important factor when taking

readings in conned spaces.

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 5740 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.

The 5740 Static Meter is an invaluable tool in investigating industrial static electricity problems. It is used

throughout production and quality control. It helps the operator to analyze the problem scientically. For
example:

• Find out how much static is present.

• Establish standards of acceptability for static levels in processes.

• Reject material if it is too static generative.

• To see where and how the static is being generated.

• To see if static eliminators are effective and if they are in the best position.

Typical static levels:

1000V active dust attraction begins

3000V attraction of light materials eg 202u lm

3000V danger level in many hazardous areas in coating & gravure printing etc.

6000V attraction of heavier lm and papers and hairs on back of hand move

10,000V lm wraps around rollers and severe dust attraction occurs

TAKK INDUSTRIES INCORPORATED

8665 E. Miami River Rd. Cincinnati, OH 45247 USA

Fax [phone] Phone [phone] or [phone] [e-mail] www.takk.com