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.
Note:
Not available for the Portavo 904X (device variant for applications in
hazardous locations).
Note on Use in Hazardous Locations
WARNING! Impairment of explosion protection.
Only open the battery compartment of the Portavo 904X outside the hazardous
location.
• The device cannot be repaired by users. For inquiries regarding repairs,
please contact Knick Elektronische Messgeräte GmbH & Co. KG at
www.knick.de.
• Never use the USB port within the hazardous location.
Summary of Contents for Portavo 904
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