The modular measurement and control system for leak testing ZEDmod from Zeltwanger enables the customer-specific setup of complex systems for leak testing, flow measurement and functional testing. ZEDmod systems, consisting of standardized components without custom-made products, include up to 8 parallel - also different - measuring circuits. The modules can be configured individually and are available with the following measurement methods: relative pressure (optional: 2-channel), relative pressure with bell test, relative pressure with flow, differential pressure, mass flow. Compact ZEDmod leak testing devices are further developments of the MQL system. In addition to stationary stand-alone tests, multifunctional leak tests can be carried out in an automated production line as well. The modular structure allows flexible adaptation to the test tasks and subsequent adjustments. The easy and quick interchangeability of the modular components enables high test system availability and reduces the spare parts inventory for duplicate devices to a minimum. With the control system ZEDmod it is also possible to control complete assembly and test lines. The user himself can carry out the calibration and adjustment in only a few minutes with the help of a service mode. Optionally, the test station can be connected to a barcode or data matrix code identification system. 
Measuring circuits are available for different applications: absolute pressure measuring circuits for tests in the vacuum range, relative pressure measuring circuits with a resolution of up to 0.1 Pa and staggered measuring ranges of up to 20 bar. There are also differential pressure measuring circuits with a resolution of up to 0.01 Pa and staggered measuring ranges of up to 20 bar, mass flow measuring circuits with a resolution of 0.02 Ncm³ / min, loadable up to max. 8 bar and a dynamic pressure measuring circuit. A module for functional tests is also available.
Typical test items are complete engines, cylinder heads, gearboxes, heat exchangers, control electronics, batteries, cables, valves, fuel cells and pumps. Other test items are catheters, dialysis filters/boxes, rinsing/hose systems, secretion canisters, syringes, external lungs and dosing pumps, plastic bottles, cartridges but also water switches/pumps, gas valves/fittings, stoves, compressors and cylinders, safety/non-return valves, couplings, grippers, ball valves and seals. Important user sectors are the automotive and automotive supply industry, medical technology, packaging, cosmetics and household appliance manufacturers.