3
Chapter 2
Setting-up
Supplying Power to the V
ELOCI
C
ALC
Plus
The V
ELOCI
C
ALC
Plus
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 V
ELOCI
C
ALC
Plus is designed to
operate with either alkaline or NiCd rechargeable batteries. Battery life
will be shorter if NiCd batteries are used. Carbon-zinc batteries are not
recommended because of the danger of battery acid leakage.
Table 2-1 Typical Battery Life at 20°C
Air Velocity
Alkaline
(ft/min)
(m/s)
(hrs)
100
0.5
>8.0
5000
25.0
5.0
Using the Optional AC Adapter
When using the AC adapter, the batteries (if installed) will be bypassed.
The AC adapter is not a battery charger. Be sure to provide the correct
voltage and frequency which is marked on the back of the AC adapter.
Selecting the Display Units
The V
ELOCI
C
ALC
Plus is capable of displaying the measured values in
several different measurement units. To change the display units on your
V
ELOCI
C
ALC
Using the Telescoping Probe
The telescoping probe contains the velocity, temperature, and humidity
sensors (humidity sensor, Models 8386 and 8386A only). When using the
probe, make sure the sensor window is fully exposed and the orientation
dimple is facing upstream.
NOTE: For temperature and humidity
measurements, make sure that at least 3 inches (7.5 cm) of the probe is in
the flow to allow the temperature and humidity sensors to be in the air
stream.
