Calibration of the oxygen probe is done in fresh atmospheric air.
The built-in data logger stores the oxygen level together with all parameters. Data can be transmitted to a PC through the built-in RS485 communication port.
Speech Processor, optional
A Speech Processor introduces a new user-friendly alarm system: instead of a siren the warning is announced in the loudspeaker:
"oxygen level to low, 18,9 %".
In this way, the situation can be followed closely. If the alarm level is reached, the Speech Processor may complement the event with instructions e.g."Please leave the room".
It is also possible for the Speech Processor to perform an alarm call to 5 preset telephone numbers and SMS-messages to GSM phones. The Speech Processor may be called and you may make it return the value of the current oxygen level in clear speech.