Available for all kind of gases, in ranges from 0-10 sccm up to 0-480 slpm (air equivalent), the red-y compact 2 meter fits a lot of applications. Sometimes this “fit” is in the small but many details, for instance OEM users appreciate that if you turn the unit around, the display automatically adjusts its position for the viewer. Important if the flow does not go from left to right. Overall users appreciate the economics, the quality and reliability of this device.
The instrument offers true portability due to its long life on a single AA battery. All 50+ variables can be adjusted through a built-in touch screen. Traveling engineers use the unit in adjusting gas flow settings, leak testing and verifying other flow meters. Once the battery reaches its life end, it can easily be replaced as AA batteries are basically just available everywhere. As an alternative, the unit can be powered through the USB cable by a power bank or a USB-port on your laptop or PC.
Making sample taking simple
The following application describes the alarm module expansion with 3 individually programmable alarm points, 2 I/O inputs and an external power supply. The alarm module replaces the battery compartment and is integrated in the red-y compact 2 meter at the back with a 3-meter 12 conduct wire for all the connections.
Emission or environment measurements often demand periodic samples of a fixed amount of gas and collect these in a container or sample bag. For example, every hour a 100 scc sample. The red-y compact 2 meter has the complete solution without the need of any PLC to control the process.
The 3 alarm points can be used for different alarm functions, such as totalizer, window, high and low alarm. We will also make use of the timer functions and the ability to reset the alarms and totalizer with an I/O input on the alarm module.
We program Alarm 1 as a totalizer alarm with the sample volume we want to collect in each sample, in our example 100 scc (Standard cubic centimeter).
In that alarm function we can also program a duration of the alarm between 100 msec and 2.78 hours. This time sets the time between the samples (see figure left).
Once the process starts, the solenoid will open and a pre-set amount of gas will flow into the sample bag or container. One the defined amount is reached, Alarm 1 will open and close the solenoid, and the gas flow will stop. Because of the programmed Alarm 1 duration setting the alarm will stay active for the pre-programmed time, in our example 1 hour.
Once this hour is over, Alarm 1 is programmed to automatically reset itself, the counter goes back to zero. The solenoid is activated again, the gas will flow and the totalizer start counting again till the pre-programmed value is reached. The process starts all over again. The process will continue and every hour one sample of 100 scc will flow into the sample container.
Alarm 3 is used for diagnostics. The alarm will sound if the sample bag/container gets full, water enters the sample line, the flow during sampling is too low (blockage of sample line) and the flow is too high (Pressure in process too high).
This is just one of the many and extensive possibilities of the red-y compact 2 meter. If you see a VA flowmeter for gas and you want to improve a process, talk to the experienced Vögtlin engineers and they will be pleased to help you to find a solution.
Vögtlin’s world-wide network of distribution and sales partners will help you selecting the equipment that matches best for your application and specific needs. Local service centers in the USA, China and Europe provide an outstanding after-sales support.
