9
Gilian®
GILAIR-3 & GILAIR-5 AIR SAMPLING SYSTEMS
Sensidyne Document No. 800880M (Rev E)
SECTION ONE
INTRODUCTION
Table 1.1
Available GilAir-3 & GilAir-5 Models
1.1 OVERVIEW
IMPORTANT
Youmustread thismanualinitsentiretytoensureproper
operation of your unit.
This manual contains basic operating information for
the GilAir-3 and GilAir-5 Air Sampling Systems.
GilAir-3 and GilAir-5 Air Sampling Systems offer both
high and low flow sampling capabilities. These capa-
bilities range from 1cc to 3,000cc and 1cc to 5,000cc re-
spectively. Table 1.1 shows the available GilAir-3 and
GilAir-5 models and modules. See Sections 3.1 & 3.2
for optional flow modules.
The Clock Timer model offers an elapsed time clock
that includes a run/hold function to pause and then re-
sume sampling. The Clock Timer Board includes a liq-
uid crystal display (LCD) and the MODE/HOLD con-
trols (See Figure 2.1).
The Program Timer model offers run/hold and delayed
start functions, as well as the capability to program up
to six (6) separate sampling programs. The program
timer board includes an LCD, and the MODE/HOLD
and programming controls (See Figure 2.2).
1.2 GENERAL DESCRIPTION
GilAir-3 and GilAir-5 samplers consist of an elec-
tronic control system, a pneumatic system, and a re-
chargeable battery pack. The GilAir-3 and GilAir-5
Air Samplers share the same electronic control sys-
tem. The pneumatic system is shown in Table 1.2.
1.2.1 Basic Control Board
All GilAir-3 and GilAir-5 samplers are equipped with
a basic control board, which contains the flow con-
trol circuitry. The board also contains the On/Off
switch, flow control potentiometer, flow fault indica-
tor, and battery charge indicator.
• Flow Control Circuitry
The GilAir-3 and GilAir-5 are designed to maintain
flow within ±5% of the initial set point while the
pump is subjected to changes in load. Sensing pump
load via the motor current, the system compensates
for any changes by applying a proportional voltage
to the motor, thereby adjusting the pump speed to
maintain flow.
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