3
Chapter 2
Setting-up
Supplying Power to the Model 7525 IAQ-C
ALC
Indoor Air Quality
Meter
The Model 7525
can be powered in one of two ways: four size AA batteries
or the optional AC adapter.
Installing the Batteries
Insert four AA batteries as indicated by the diagram located on the
inside of the battery compartment. The Model 7525 is designed to
operate with either alkaline or NiMH rechargeable batteries, although it
will not recharge NiMH batteries. Battery life will be shorter if NiMH
batteries are used. Carbon-zinc batteries are not recommended because
of the danger of battery acid leakage.
Using the Optional AC Adapter
When using the AC adapter, the batteries (if installed) will be bypassed.
Be sure to provide the correct voltage and frequency, which is marked
on the back of the AC adapter. The AC adapter is not a battery charger.
Using The Probe
The sensing probe relies on the diffusion of air. For best results, try to
keep the sensing probe surrounded by moving air. Do not breathe on the
probe. Humans exhale CO
2
levels exceeding 10,000 ppm and it may
take time for the probe to re-stabilize. Use the probe holder to support
the probe when in continuous data logging mode.
Connecting to a Computer
Use the USB Cable provided with the Model 7525 to connect the instrument
to a computer. Connect the end labeled “COMPUTER” to the computer
USB port and the other end to the data port of the Model 7525.
For more information on how to download stored data see Chapter 3 section
titled
LogDat2
™
Downloading Software
.
Caution:
This symbol is used to indicate that the data port
of the Model 7525 is
not
intended for connection to a
public telecommunications network. Connect the USB
data port only to another USB port.
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