Crowcon Tetra MO7237, User Manual, Page: 5 / 36

Tetra Unpacking
Tetra
Personal Multigas Monitor
Thank you for purchasing the new Tetra Personal Multigas Monitor . Tetra has
redefined portable gas monitoring and will give you years of unparalleled serv-
ice and reliability.
Please read the instructions carefully before use. Keep the manual for future
reference.
Unpacking
Remove the Tetra Personal Multigas Monitor from the packaging. The Tetra
accessories will be located in the bottom of the box. Check the contents are
complete, you should have:
• Tetra unit;
• Optional battery charger power supply for units supplied with
rechargeable Li-ion batteries;
• A configuration report detailing the sensors installed, alarm
settings and a calibration certificate;
• Optional accessories such as flow adaptor and aspirator bulb;
• Optional spare battery pack for non-rechargeable units.
Battery check
The Tetra Personal Multigas Monitor has two battery options: Li-ion recharge-
able or alkaline non-rechargeable batteries. Depending on the battery option
chosen, the Tetra will operate for a minimum of 12 hours and up to 18 hours
when fully charged.
Rechargeable units
Tetra uses a Li-ion battery pack and should arrive with sufficient charge so that
the unit can be used straight out of the box. However, if this is the first time
you have used the Tetra unit, you may need to charge the batteries to attain
the full 12 to 14.5 hour operating time. (The actual operating time will depend
on the types of sensors installed.)
Warning: rechargeable units
Do not attempt to use any other charger power supply with this unit except
the one supplied by Crowcon. Failure to comply could invalidate safety certi-
fication and may result in permanent damage to the unit.