Snap-On Diagnostics DGA 1000, Manual, Page: 56 / 116

3-8
Vehicle Testing
General Emissions Measurements
After setting up the vehicle, RPM selector, fuel type, limits on/off,
and edit limits used, use the Diagnostic Gas display to read
various emission gases. Refer to
Chapter 7–Diagnostic
Technique for more information.
To Test
1. Set up the vehicle, press key and enter the
information.
2. To know when certain values are exceeded, turn on limits
and observe the up arrow (
Ï
), down arrow (
Ð
), or check
mark (
✔
) in the Gas display boxes.
3. After the Auto zero and hang-up test are completed, insert
the sample probe in the tail pipe and connect an exhaust
removal system.
4. Once gases display, up to two sets of data may be stored
using the
key on the analyzer front panel. Press the
key once to enter the storage mode and a second time to
store the information.
✓
The key displays on the center of the screen when
data is stored.
✓
To view the stored data on the Gas Display Screen, select
the
key. The stored results may be viewed, printed or
cleared.
✓
The test can be performed with or without RPM and oil
temperature, if desired.
✓
If limits are ON, the first set of stored values are
compared to Limit Set 1. The second stored values
are compared to Limit Set 2.
: Measurement Screen