RH and Shower Functions
The Q-FOG model CRH can ramp to and maintain a defined RH value and temperature through the use of an air pre-conditioner, a blower module, and special atomizing humidification nozzles. DI water is required for proper operation.
The Shower Function in the Q-FOG CRH is used for some automotive test specifications. A user-adjustable volume of solution is uniformly sprayed onto specimens through specially positioned spray nozzles. The Shower Function offers the following advantages:
- Nozzles are mounted to a spray bar, which can be easily removed when using the Fog Function
- Spray droplets are much bigger, flow rates are much higher, and shower times are much shorter than the atomized solution mist in the Fog Function
- Shower on/off times can be directly programmed to allow for excellent control of corrosion rates
Precise Control of Fog Dispersion
The Q-FOG CRH cyclic corrosion chamber has superior fog dispersion compared to conventional systems, which cannot vary volume and distance independently. A variable speed peristaltic pump controls the amount of corrosive solution delivered to the fog atomizer, while the air pressure regulator controls the distance of the “throw.” Note that purified water is required for proper operation of Q-FOG corrosion testers.
Internal Solution Reservoir
Space utilization is maximized and maintenance is minimized with the Q-FOG tester's internal solution reservoir. The 120 liter reservoir has enough capacity for running most tests for 7 days or more. The reservoir has an integral particulate filter and a built-in alarm to alert the operator when the solution is low.
Q-FOG testers can change temperatures exceptionally fast because of their unique internal chamber heater and their high volume cooling/dry-off blower. An additional air heater allows very low humidity dry-off exposures. Conventional chambers with water jackets cannot cycle rapidly because of the thermal mass of the water, nor can they produce low humidity.
The Q-FOG CRH tester’s chamber temperature and RH sensors should be calibrated by the user every six months to ensure accurate and consistent results.
Calibrating the temperature and RH sensors takes only a few minutes. It requires simple tools, a calibrated reference thermometer, and an insulated container.
Easy Programming and Sample Mounting
Test conditions, time, and temperature are controlled by a built-in microprocessor. A remarkably simple user interface allows for easy programming and operation. The operator can quickly create new cycles, or run any of the programmed cycles. The Q-FOG controller includes complete self-diagnostics, including warning messages, routine service reminders, and safety shut down.
Model CRH units come equipped with a viewing window in the side of the lid and an internal light to allow easy monitoring of the test conditions.
Q-FOG testers have a low belt line and an easy-opening lid for easy sample mounting. The 600 model has a capacity of 160 test panels of 75 x 150 mm in size. The 1100 model has a capacity of 240 test panels.
Q-FOG cyclic corrosion testers offer state of the art corrosion testing technology, reliability, ease of operation, and easy maintenance – all at a remarkably affordable price.