I. GENERAL DESCRIPTION
The CAL-101 is a small, battery-powered, portable electrochemical gas
generator designed to calibrate toxic gas sensors.
Fast warm-up time allows the instrument to be turned
off between remotely located sensors saving battery
life and avoiding generation of unwanted gas. The
CAL-101 uses the following components to produce
the calibration gas/air mixture:
Internal Micro Pump
A small air pump draws in ambient air to blend with the electrochemically
generated gas.
Electrochemical Generating Cell
The electrochemical generating cell contains an electrolyte solution and
either inert or consumable electrodes, depending upon the gas being
generated. A precise concentration of gas is produced when the CAL-101
supplies a known amount of current and a known amount of air continuously
to the cell.
Alkaline “AA” Batteries
A set of two fully charged alkaline “AA” batteries provides 10-12 hours of
operation. To replace the batteries, first remove the cell then slide the battery
chamber in to allow the batteries to drop out the bottom of the instrument.
NOTE: Rechargeable batteries will provide substantially fewer hours
of operation and will self discharge while the instrument is in storage.
Users should also be aware that use of rechargeable batteries will void
the CSA approval of the CAL-101 for intrinsic safety.
Microprocessor-Based Circuitry
When powered-up, the microprocessor provides remaining cell and battery
life indication via the display LEDs. Low battery or exhausted cell conditions
are also indicated when the condition occurs. (See section IV Non-Normal
Operation.)
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