Instruction 24-9448
4-21
Operation
Instruction 24-9448
4-10
Operation
4.16 Downloading Stored Data to a Computer
The combustion test data that was stored in either the analyzer’s Memory
Directory (Section 4.9), or Logging Directory (Section 4.14), can be down-
loaded to a computer using the PCA 2 Data Recovery Program and USB
cable that are supplied with the analyzer.
The following procedures assume that the operator is familiar with creat-
ing folders and navigating the file structure of the Windows operating sys-
tem. If necessary, consult the Windows help files for instructions on how to
perform these procedures.
The downloaded data is stored on the computer’s hard drive – or removable
media of the operator’s choosing – as a comma-separated-value ASCII text
file with a CSV extension. This type of file can be opened by most spread-
sheet programs for analysis.
Computer requirements:
• Windows 98SE or higher
• CD ROM drive
• USB 1.1 or USB 2.0 port
• 12 MB of hard drive space for the PCA 2 data recovery program, plus
up to an additional 350 KB for each download
a. Press the
ZERO (F2)
button.
b. Disconnect any hoses connected to the
+
∆
P and –
∆
P ports, and then press
ENT
to
zero the pressure sensor.
c. Reconnect any hoses. When measuring
draft, simply leave the –
∆
P port open to
the atmosphere and connect the probe’s
draft hose to the +
∆
P port (see Figure 3-2
on Page 3-3).
5. Do one of the following to measure draft or dif-
ferential pressure:
• To measure draft, simply insert the probe
into the stack and observe the draft read-
ing on the PRESSURE screen.
• To measure differential pressure, con-
nect two sampling hoses to the +
∆
P and
–
∆
P ports, and place the open end of each
hose into the areas being measured. The
differential pressure between the two areas is now displayed on the
PRESSURE screen. If the pressure at the +
∆
P port is higher than the
–
∆
P port, then the pressure reading will be
positive
. If it is lower, then
the reading will be
negative
.
4.9 Saving Test Data
Up to 500 individual sets (“snap shots”) of combustion-test, pressure, or
temperature data can be saved in memory, which can later be recalled
for viewing from the Memory Directory (Section
4.13.1).
1. First display the screen that contains the data
to be saved. In the example to the right, all
data associated with the Combustion Test
RUN screen will be saved.
2. Press the
SAVE (F3)
button to save the test data
in the next available memory location.
NOTE:
When memory is full, the next reading
will not be saved until space is made available by clearing the
PRESSURE ZERO
Disconnect hose then
press ENTER
PRINT ZERO SAVE
F1
F2
F3
PRESSURE ZERO
Reconnect hose
PRINT ZERO SAVE
F1
F2
F3
RUN NATURAL GAS
O
2
4.0 %
CO
12 ppm
EFF 82.6
%
CO
2
9.5 %
T-STK 374
°F
T-AIR 68.0 °F
EA 21.3
%
CO(O)
13 ppm
PRINT MENU SAVE
F1
F2
F3
