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OPERATING MANUAL
VERSION 05/2017 ORDER NUMBER DOC 2357061
6.4.4 FLOW METER MONITORING
For safe operation it is necessary for the 2K system to receive a signal, when the gun is
open and there is 2K product ow. Otherwise for example no B product is added when the
A ow meter is blocked, although A product continues owing through the leakage in the
ow meter (possibly not visible).
The signal (product ow yes/no) can be made available on ways that follow:
for AirSpray- or AirCoat manual spray guns: AirSpray + AirCoat gun monitoring
(atomizing air-ow switch);
for Airless- or HVLP manual spray guns: ow monitor (lacquer-ow switch in the lines
to the guns);
for automatic spray guns: automatic gun monitoring (pressure switch);
for digital robot communication: robot signal ("gun signal 1/2/3/4");
for bus communication (e.g., CAN Probus Gateway): signal by superordinate control
("gun monitoring 1/2/3/4").
Gun monitoring for each gun
If possible, each gun should be monitored separately.
NOTICE
Caution with only one gun monitoring for multiple guns!
If for several spray guns only one gun monitoring is installed, the controller does not
know which gun in each case is in operation.
Then the product ow is divided to all guns.
The pot lives in the gun hoses and guns can be exceeded without a pot life alarm.
WARNING
Incorrect installation of the device!
Explosion hazard and damage to the device.
The ow monitor is non-Ex-proof and has to be installed outside the explosion zone.
Lay and x the connection pipes correctly and protect them against tripping, dirt and
damage.
No air consuming equipment, other than the feed pumps for a 2K system, may be
installed after the ow monitor (e.g., pumps circular pipeline and stirrer).
6.4.5 LACKOFPRODUCT PROTECTION
Make sure that product without air bubbles is supplied to the mixing and dosing system.
The ow meters can not detect whether product or air is delivered.
This may lead to mixing errors. (An air bubbles monitoring system is optionally
available for the low-pressure model).
A lack-of-product protection can be achieved by installing a level probe in the A-product
tank or by always having the coater make sure that sucient product is in the tanks.
Otherwise false coating may occur.
If, e.g., the A-tank's level probe indicates the minimum level, a signal can stop the 2K system
(STOP) or electronic consumption measuring equipment warns of a lack of product.
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