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Tetra 3 Event logging
Zero
The Tetra 3 instrument can perform an auto zero by selecting the Zero
function from the menu. When Zero is completed, the instrument will
return to normal operation.
2.5 Logging
Tetra 3 incorporates data and event logging which can be accessed using the
communications link with Portable PC software. See section VIII.
The Tetra 3 event log records the time and date for a number of operating and
diagnostic events including:
• Switch on and switch off
• Level 1, Level 2 and Time Weighted Average Alarms, alarm on,
alarm off and the peak level during the alarm
• Zero, calibration and gas test with success or failure
• Pellistor saver on and off
• The battery condition is logged every time the Tetra 3 is
switched on or off, and when it is placed into or removed from
the charger
• Datalogging records reading sets data at a predetermined time
interval, usually set to one minute.
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