VLM DosiCORR® AD - Automatic Gas Dosing Unit for the Kesternich Test
Fully automatic Kesternich test and ASTM G85 (A4) procedure controlled by high
performance PLC controller
VLM DosiCORR® AD Automatic Gas Dosing Unit for the Kesternich Test
Fully automatic Kesternich test and ASTM G85 (A4) procedure controlled by high
performance PLC controller
The automatic gas dosing system for Kesternich test (DosiCORR® AD) in SO2 (or Ammonia) environment is an option for high-end VLM test chambers featuring Beckhoff PLC controller. These test chambers (typically ClimaCORR and CCT type of chambers) are equipped with a separate safety cabinet placed inside the bench underneath the test chamber with cradles for placing 1 or 2 bottles with SO2 (or Ammonia).
The control of the DosiCORR® AD gas dosing system is fully integrated into the high performance Beckhoff PLC controller.
Customer Benefits
- Fully automatic Kesternich test and ASTM G85 (A4) procedure controlled by high performance PLC controller
- The PLC control features fully automatic gas dosing (both specified volume and continuous flow) and switching from one to another bottle when one gets empty
- Highly sensitive electronic mass flow meter/controller allows accurate gas dosing and the indication of the remaining mass of the gas in the bottle on the display
- Modular design of VLM test chambers allows adding Kesternich test option long after the chamber has been commissioned
- Data logging
-
Safety
SO2 is a poisonous gas implying that the safety of the operating personnel was one of the main design requirements of the DosiCORR® AD dosing unit. For this reason this system meets the highest safety standards. Some of the features are:
- Accidental contact of the personnel with SO2 is prevented even in the case of unexpected power failures
- After each Kesternich test, the aeration fan inside the test chamber will automatically start and operate for 10 min in order to evacuate the last remnants of SO2 out of the test chamber
- The door of the test chamber will be locked during these 10 minutes
- The dedicated ventilation system in the casket with SO2 bottles is continuously operating during the Kesternich test
- The casket with SO2 bottles is made of a fire-resistant material specially designed for this purpose
-
Applicable Test Standards
IEC 62716
ASTM G87
ASTM G85 (A4)
EN ISO 6988
DIN 50018
-
Process Control
- The operation of the DosiCORR® AD gas dosing unit is fully integrated in the process control of the ClimaCORR® test chambers. All functions and parameters of the Kesternich test are controlled via the user interface of the Beckhoff PLC controller (touch screen).
- A standard Kesternich test consists of two phases within 24 h cycle from which the first phase (8 h) features the introduction of the gas (SO2) into the test chamber and the second phase (16 h) features ventilation. The volume of the gas per cycle (in litres) is specified via user interface (touch screen) of the Beckhoff controller and is a part of the overall control software for the management of the test cabinet. The Kesternich test is a part of the High Humidity Condensation (AHT) test
- ASTM G85 (A4) test standard requires different control mechanism than the standard Kesternich test. In this case Salt Spray has to be combined with a continuous dosing of SO2 gas. A special mass-flow controller is used to control the continuous flow of the gas.
- The standard gas dosing volume for Kesternich test is 2 L per test cycle (one test cycle takes typically 24 h).
NOTE: All test chambers with AWRF option require a permanent source of
demineralized water under pressure and a supply of compressed air.
