12
Commissioning
Inserting the Batteries
With four AA batteries, the Portavo has an
operating time of over 1000 h.
Open the battery compartment on the
rear of the device. Be sure to observe the
correct polarity when inserting the batter-
ies (see markings in the battery chamber).
Close the battery compartment cover and
fasten it finger tight.
Check the shipment for transport damage and completeness (see Package
Contents).
CAUTION!
Do not operate the device when one of the following conditions applies:
• the device shows visible damage
• failure to perform the intended function
• prolonged storage at temperatures above 70 °C / 158 °F
• after severe transport stresses
In this case, a professional routine test must be performed.
This test should be carried out at our factory.
A special lithium-ion battery (ZU 0925) suited to the battery compartment is avail-
able for the Portavo 904. Only this battery type can be charged directly from the
USB port.
A battery icon in the display indicates the battery power level:
Icon fully filled
Batteries at full capacity
Icon partially filled
Battery capacity is sufficient
Icon empty
Battery capacity not sufficient;
calibration is possible, no logging
Icon blinks
Max. 10 operating hours remaining, measure-
ment is still possible
NOTICE!
It is absolutely necessary to replace
the batteries.
