15
GM 5000EAC
.
OPERATING MANUAL
EDITION 03/2012
PART NUMBER DOC 2319150
4.1
FIELDS OF APPLICATION, USING IN ACCORDANCE WITH THE INSTRUCTIONS
The electrostatic spray gun can only be used with the VM 5000 or VM 500 control units.
4
DESCRIPTION
4.1.1
PROCESSABLE MATERIALS
➞
With the GM 5000EAC gun, paints can be applied which contain solvent of explosion
class II A.
➞
The spray gun basic version is suitable for processing of sprayed substances with an
electrical resistance of > 150 k
(according to the WAGNER scale). Equipped with a
special material hose for low impedance sprayed substances (available as accessory)
you can also sprayed substances with an electrical conductivity > 50 k
(according to
the WAGNER scale) process successfully.
➞
The application effectiveness is always dependant on the composition of the paint
being used, e.g. pigments or resin.
Conversion of the resistance of paint
There are paint resistance measuring devices on the market that do not measure directly
the specifi c resistance of paint. Multiplying the result of measurement with the
device-specifi c cell constant (K), we obtain the resistivity value of the material.
Example:
The Wagner paint resistance measuring device is the cell constant K =123.
Measured value according to the WAGNER scale R = 500 k
Specifi c resistance (R
S
) R
S
= R x K = 500 k
x 123 = 61.5 M
.cm
Note
With sprayed substances and those with too low electrical resistance the electrostatic
effect will not have any effect, i.e., there will be no „wrap around“ noticeable at the spray
object. The relationship between the values of the high-voltage (kV) and the current (µA),
shown on the VM 5000 control unit and/or on the spray gun, denotes the charging capacity
of a spray material.
High kV value, low µA value = ok
Low kV-value, high µA-value = Excessive conductivity of the paint -> no wrap-around
In the event of application problems, contact your WAGNER branch and the paint
manufacturer.
