Casella CEL CEL-63X - Manual (Page 10)

CEL-63x Environmental & Occupational Noise Meter
10 Casella CEL
3 Quick reference
3.1 Powering the instrument
The options for powering the instrument are as follows:
Batteries
12 V DC adaptor (part number -PC18)
USB connection (part number -CMC51)
Battery supply
You can use alkaline or rechargeable AA batteries to operate the instrument. Do
not use a mixture of alkaline and rechargeable batteries at the same time.
The operating time that you can expect from a fully charged or new set of
batteries depends on the battery capacity and whether you use the instrument‟s
backlight. Environmental conditions such as the ambient temperature also
affect battery life. See section 6 “
Specifications ” beginning on page 59 for some
typical battery life examples.
You should also carry a spare set of batteries.
IMPORTANT
To save power when operating on batteries, the CEL-63x instrument switches OFF
automatically if no measurement run is in progress and there is no key-press activity
for five minutes.
You should operate the instrument on a mains DC power supply if you must leave it
unattended while making an extended measurement run. The instrument does NOT
switch off automatically when it operates from a mains DC supply.
How to fit new batteries
Before you begin:
Read the caution notice about Batteries on page 8.
You should check that the batteries have adequate battery life before you begin
a measurement. Replacement batteries should be new or fully charged.