Precision Calibrator The Model 702 Precision Calibrator provides an ideal means of calibrating ambient air analyzers in an economical, high-value manner. A microprocessor controls all functions 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 can be supplied with an internal ozone generator and an EPAconforming glass GPT chamber to allow both ozone and 8Remote control with contact closures controlled flow control system to provide stable flow generator with temperature control conforming glass GPT chamber variable O3 concentration presets ease of use, reliability and performance handle for portable applications 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.

Precision Calibrator Specifications Calibration gas ports: Ambient temperature range: Dilution ratio: Flow stability: Ozone generator: Current regulated, temperature controlled mercury vapor lamp 2 (independent) 50 ppb (minimum) (@ 1 SLPM); 4 ppm (maximum) Dimensions (HxWxD): Ozone pre-set points: Ozone adjustment resolution: Ozone concentration: Approvals: Peripheral equipment required: Source gas cylinder with dual stage regulator, 40 psig TAPI Model 701 Zero Air Module or other source of zero air (3 SLPM @40 psig) Ozone stability: Power Requirements: Diluent flow: How to Order Model 702 Precision...