Gas Calibrators & ZAG
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​Model 702

​ Precision Calibrator

 

Features

 

  • Standard two year warranty
  • Two channels of source gas
  • Remote control with contact closures
  • Digital status output
  • Temperature controlled flow control system to provide stable flow
  • Optional ozone generator with temperature control
  • GPT using EPA conforming glass GPT chamber
  • Two independent variable O concentration presets
  • Digital electronics for ease of use, reliability and performance
  • Optional carrying handle for portable applications
  • Rack mountable

Maintenance


Please refer to manual ​for maintenance instructions.

 

  ​

Downloads

  
  
  
702.pdf702 Specification350 KB
M702 Manual_01914.pdf702 Manual1693 KB

Specifications


Calibration gas ports 2
Diluent flow 1 to 3 SLPM
Calibration gas flow 10 to 50 cc/min
Dilution ratio 20:1 to 300:1
Flow stability 1%/7 days
Ozone generator Current regulated, temperature controlled mercury vapor lamp
Ozone pre-set points 2 (independent)
Ozone concentration 50 ppb (minimum) (@ 1 SLPM); 4 ppm(maximum)
Ozone adjustment resolution 5 ppb
Ozone stability 3%/7 days
Ambient temperature range 5 to 40°C
Power Requirements 100V 50/60 Hz, 115V 60 Hz, 220V 50/60 Hz,
230V 50 Hz, 240V/50 Hz, 100 Watts
Weight 29 lbs. (13.1 kg)
Dimensions (HxWxD) 5.25” x 17” x 23.5” (134 x 432 x 597 mm)
Peripheral equipment required




Specifications are subject to change without notice.
All specifications are based on constant conditions.​

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) ​​​

Description

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.