Support – problems during operation

No. The devices in the Dosistar series are electronic control and regulation units used to control electric direct current pumps. Additionally, we can offer flow meters and pickup sensors that work well with our dosing controls. However, to build a complete dosing system, you will need additional components (depending on the complexity) that we do not offer:

• Pump
• Hoses
• Shut-off valves
• Fittings/holders/nozzles
• Reservoir containers

If you require a complete dosing solution, please contact one of the system suppliers with whom we closely work.

IML Electronic has completely taken over the distribution, support, and maintenance of Dosistar devices from argus electronic. We strive to repair even older devices in case of defects. In cases where repairs on particularly old devices are no longer possible due to discontinued components, we can offer you suitable replacements.

To prevent problems when restarting later, please note the following points:

• Rinse the flow meter well: Before the system is drained and stored, the flow meter should be rinsed thoroughly with clear water. This prevents residues of the dosed liquid from drying out and sticking together, thus permanently blocking the impeller in the flow meter.
• Store as dry as possible: The electrical contacts in plugs and sockets are particularly susceptible to corrosion. Store the entire dosing system so that no condensation can form on the device.
• Protect the Dosistar from mechanical stress: The rotary knobs and display foils in particular on all Dosistar variants are susceptible to mechanical damage due to their design. Never place other objects on your dose star.

Problems when recommissioning dosing controls most likely occur in the area of cabling/plug contacting

Please check all electrical contacts and connectors:

• tight fitting of plug and socket
• tight fitting of all cables inside the plugs
• clean contact surfaces inside plugs and sockets. Use contact spray to clean them if necessary

If the pump starts but no flow is detected despite good electrical sensor connections, please clean the flow meter. To clean it thoroughly, the emergency running function can be used, allowing manual adjustment of the pump’s performance.

For optimal results in measurement and control, the correct selection of a suitable flowmeter for the desired flow range is crucial. The following table provides an initial non-binding guideline for this:

Flowmeter Type	Flowmeter value for water Wasser [Imp/L]	max. flow [L/h]	min. recommended flow [L/h]
1,0mm	2223	35	9
1,2mm	1787	46	11
1,5mm	1386	80	13
2,0mm	1013	139	18
2,5mm	754	164	24
3,0mm	572	293	32
4,0mm	382	435	48
5,6mm	256	498	75
7,0mm	165	1080	110

If the recommended minimum flow rate is not met, there is a risk of generating too few pulses per second for a clean measurement. This can lead to measurement and control errors.

When sizing the pump, it is recommended to provide a control reserve of approximately 20%. This means that the maximum flow rate oft he pump should be 20% greater than the desired maximum flow rate of the entire system.

It can happen that the push button moves on its axis and then rests against the front panel of the device and can be difficult or impossible to operate. Solution:

• Carefully pry off the cap covering the push button
• Slightly loosen the 10mm nut holding the push button
• Pull the push button 3mm away from the front panel, fix the 10mm nut in this position

It can happen that the push button moves on its axis and then rests against the front panel of the device and can be difficult or impossible to operate. Solution:

• Carefully pry off the cap covering the push button
• Slightly loosen the 10mm nut holding the push button
• Pull the push button 3mm away from the front panel, fix the 10mm nut in this position