The Model 702 Precision Calibrator provides an ideal means of calibrating ambient air analyzers, in an economical, high-value manner.
A microprocessor controls all the functions of the Model 702 including temperature control of the restrictor/orifice flow regulators, flow control system and ozone generator, ensuring accurate temperature-independent performance. The versatility of the Model 702 is unmatched. It may be supplied with an internal ozone generator and an EPA-conforming glass GPT chamber to allow both ozone and GPT calibration checks.
The two inlet ports allow use of two independent calibration gases, which may be diluted to provide the required span gas. Dilution ratios from 20:1 to 300:1 are manually set from the front panel. Once set, they can be remotely activated by external contact closure or by front panel switch.
With the GPT/O3 option, two preset levels of ozone concentration can be programmed by the operator as a percent of full scale ozone concentration. The ozone GPT level can then be activated remotely by contact closure or front panel switches. Contact closures also indicate Model 702 operating mode as well as temperature warning and System OK signals.
The Model 702 includes surge and transient protection for the main power. Voltages/frequencies of 115, 220, 240, 50/60 Hz are field configurable, and the unit is CE approved.
