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DPM-RT-2 Operating Manual
4.7
Free Acceleration Test
The format of the Free Acceleration Test is like the Stall Test, but there are some important differences,
notably:
•
testing is performed with the transmission in neutral
•
there are three acceleration peaks, compared with just one in the Stall Test.
The test consists of: 8s idle, 8s full power, 8s idle, 8s full power, 8s idle, 8s full power, 12s idle. For
completeness, the full test procedure follows.
4.7.1
Test Details
The test’s details are a set of text parameters that allow you identify this
test in the list of previous results. It also allows the user to associate a
piece of equipment with the test.
Tapping on the buttons will bring up an on-screen keyboard for the user
to enter in the required information.
4.7.2
Zero Instrument
Prior to any test, the instrument initiates an auto-zero procedure, prompting the operator to ensure that the
sample probe is in relatively clean air (for instance, not directly downstream from the exhaust of an
operating engine). This procedure ensures the exhaust paths into the unit are clear from exhaust fumes.
4.7.3
Insert Probe
Insert the supplied sample probe fully into the exhaust of the vehicle or
plant under test, using the spring wire retainers to secure the probe in
position. Confirm that the engine is running and at normal operating
temperature, with the transmission disengaged in accordance with the
MDG 29 procedures,
MDG 29 Test Procedures (Extract)
4.7.4
Initiate Test
After inserting the probe, check that the vehicle or plant under test is
chocked or braked to prevent movement and ensure that all personnel
are clear. With the test operator at the controls, check for clear line of
sight to the DPM-RT-2 screen or remote. When ready, press the
ENTER
button or tap the
Green Tick
button.
