Computerized Multi-Gas Calibration System — Series 6100

The Environics^® Series 6100 computerized multi-gas calibration system is an advanced computer-controlled instrument specifically designed for dynamic multi-point gas calibration of ambient air analyzers.

The Environics^® Series 6100 can automatically execute zero, span, precision, and multi-point calibrations using hydrocarbons, O₃, CO, NO, NO₂, SO₂, and other gases of interest. Additionally, the 6100 conforms to all U.S. Environmental Protection Agency requirements.

The Series 6100 computerized multi-gas calibration system includes several components, such as a chassis that supports up to three thermal mass flow controllers, a mixing zone, an ozone generation module, control electronics, and a reaction chamber for gas phase titration. Units can be designed for 24, 120, or 240 V operations. Standard options include the latest ammonia circuit and permeation.

From the front panel, commands can be entered and displayed on a backlit 4 line by 20 character liquid crystal display. The RS-232 serial data interface or contact closures — both of which are standard in the Environics^® Series 6100 — can also be used to operate the instrument remotely.

Although the Environics^® Series 6100 comes standard with two mass flow controllers, a third one can also be added to support a larger range of dilutions. Furthermore, the mass flow controllers are calibrated to a National Institute of Standards and Technology (NIST) traceable primary standard. The calibration data includes a comparison of preferred flow versus actual flow over the instrument’s entire dynamic range with linear interpolation between points. All calibration data is stored in non-volatile memory but users can update it with an appropriate standard.

The Series 6100 temperature-controlled, ultra-violet (UV)-based ozone generator is factory calibrated using a NIST traceable ozone standard. The ozone generator comes with a precision photo-optical feedback circuit to offset lamp aging effects.

The Series 6100 ozone generator is available in either a portable configuration or standard rack mount.

New Features

The Environics^® Series 6100 can now be ordered or retrofit to run on a 24 V power source, allowing users to utilize their units anywhere, anyplace.

For those working with ammonia, the S6100 can be designed with an optional NH₃ circuit to dilute ammonia without risking the degradation of the ozone circuit.

Both new and in-service units can be improved for low ozone levels, down to 2 ppb repeatedly to conform to 40 CFR Part 58, Appendix A requirements at NCORE and trace sites.

Product Features and Benefits

Automatic computation of dilution and span gas flows based on commanded concentration not only removes the requirement for manual computation but also enables quick transition from point to point.

Easy-to-use interactive software with simple language prompts is convenient to use, decreasing technician training time and almost eliminating error.

Ozone generator calibration data is stored internally and ensures linear and repeatable ozone generation without photometer control to a stable, repeatable 2 ppb. In addition, ozone generator performance conforms to U.S. EPA criteria for ozone transfer standards.

Mass flow controller calibration data are stored internally and they enhance precision by as much as a factor of 10 and simplify field recalibration. Moreover, mass flow controllers are factory calibrated at 11 points.

Full, two-way RS-232 serial data interface (standard) allows remote operation of the system including gas selection, data collection, and initiation of zero, span, and multi-point calibrations.

Ozone generator pressure compensation guarantees stable and repeatable generation of ozone at pressures other than the original calibration pressure.