Xylem HandyLab 750(EX) - Manual (Page 36)

36
Safety guidelines
(HandyLab 750, 750 EX)
Caution!
Do not operate the device when one of the following condi-
tions applies:
• the device shows visible damage
• the device fails to perform the intended function
• prolonged storage at temperatures above 70 °C
• severe transport stresses
In this case, a professional routine test must be performed.
This test should be carried out by the manufacturer.
Inserting the Batteries
With four AA batteries, the HandyLab 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 batteries (see markings in the battery
chamber). Close the battery compartment cover and screw it handtight.
A special lithium-ion battery suited to the battery compartment is available
for the HandyLab 750. The battery is recharged through the USB port.
Note:
Not available for the HandyLab 750 EX (device variant for applications
in hazardous locations).
Caution!
Take protective measures against ESD when the sensor socket
is open. At measuring temperatures from -20 to +100 °C the
temperature detector can be automatically identifi ed.
The charging time of the battery may vary when a USB port with
lower power output is used. Temperatures above 50 °C may
result in loss of battery capacity.
A battery icon in the display indicates the battery power level:
Icon fully fi lled Batteries at full capacity
Icon partially fi lled Battery capacity is suffi cient
Icon empty Battery capacity not suffi cient; calibration is possible,
no logging
Icon blinks Max. 10 operating hours remaining, measurement
is still possible
Caution!
It is absolutely necessary to replace the batteries.