21
Gilian
®
AIRCON-2 HIGH VOLUME AIR SAMPLER
Sensidyne Document No. F-PRO-3100 (Rev D)
SECTION THREE
OPERATION
3.1
OVERVIEW
This section covers the operation of the AirCon-2. Dif-
ferences among the models are described below. Basic
operating procedures for both Basic and Program Mod-
els are described in Section 3.2. Fault conditions are de-
scribed in Section 3.3. Section 3.4 provides detailed in-
formation on how to program the unit.
OPERATION NOTE
The rotameter provided has been tested for accuracy and is
within
±
5% of full scale. However, the rotameter should be
periodically checked against a primary standard, such as the
Gilibrator. Be sure to maintain the sampler in a vertical
position to ensure accurate operation of the rotameter.
3.1.1
AC Basic Model
The AC Basic model operates only in Single Mode.
Here, sampling is continuous (at constant flow) until
the unit is turned off.
3.1.2
AC Program Model
The AC Program model offers a versatile programming
system. In addition, this model offers suction pressure
load indication, and an instant Fault Function when
flow deviates by more than
±
5%. In situations when
the 5% envelope is violated for more than 30 seconds,
the unit stops sampling and latches the time function,
allowing you to determine data and sampling time va-
lidity.
3.1.3
DC Program Model
The DC Program Model has all of the features of the AC
Program Model, plus a unique modular battery pack/
power module operating system. The DC Program
Model also features a unique hold function. When a
fault occurs, the hold function keeps the display visible
so long as adequate battery power is available. If the
battery level drops further, the display is erased. How-
ever, the unit stores the “lost” data in internal memory
for later recovery. When the unit is connected to a fresh
battery pack and turned on, the previous run-time data
are re-displayed on the screen.
3.2
BASIC OPERATION
3.2.1
Single Mode (All Models)
Single-Mode operation provides complete manual con-
trol of sampling (refer to Tables 3.1 & 3.2 for details).
The unit is turned on, the flow is set, and the ACCEPT
button is pressed. This enters the flow fault information
into the on-board computer. Pressing Run starts the
sampler. The sampler continues to run until the Hold
button is pressed, or the unit is turned off. You can use
the Run/Hold and Time/Press buttons at any time
while the unit is sampling.
Single-Mode operation provides complete manual con-
trol of sampling. The procedure for Basic Models in-
volves turning on the unit, setting the air flow, and run-
ning the unit. Sampling continues until the unit is
turned off. For Program models, the unit is turned on,
the air flow is set, and the ACCEPT button is pressed.
This enters the flow fault information into the on-board
computer. Pressing Run starts sampling. Sampling con-
tinues until the Hold button is pressed, or the unit is
turned off. You can use the Run/Hold and Time/Press
buttons at any time while the unit is sampling. Tables
3.1 and 3.2 provide step-by-step instructions for per-
forming Single-Mode sampling.
3.2.2
Cycle Mode Operation
Cycle mode runs the sampler from previously created
programs. An example of cycle mode programming is
shown in Section 3.4.