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Instruction 24-94484-8
Operation
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
differential 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, connect
two sampling hoses to the +∆P and –∆P
ports, and place the open end of each hose
into the areas being measured. The dif-
ferential 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.
4.7 Saving Test Data
Up to 500 individual sets (“snap shots”) of combustion-test or pressure
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
saved will overwrite the oldest reading.
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
O2 4.0 %
CO 12 ppm
EFF 82.6 %
CO2 9.5 %
T-STK 374 °F
T-AIR 68.0 °F
EA 21.3 %
CO(3) 13 ppm
PRINT MENU SAVE
F1 F2 F3