End Of Test; Interpretation Of Results; Response Time - Hartridge HK900 Operating Manual

Operating Manual
Go through the test steps in the order shown (steps 1 and 2 are for preparation and warm up, steps 3
to 6 are the main tests).
stabilise before taking results.
NOTE: For the most accurate metering results, use Calibrate mode.

4.3.6 End of Test

If you have been saving results, then at the end of the test press F4 [Stop Test]. This opens the
dialog below (the same as the Start Test dialog with additional fields for the filename and comments).
Complete the information required and select either [Save] or [Save and Print] (to get a printout at the
same time).

4.4 Interpretation of Results

The best way to use the HK900 kit is as a comparator against new injectors. The demand settings in
the example testplans supplied should give delivery results for the majority of injectors however there
may be some test conditions that do not (particularly the idle speed step). We recommend that these
testplans are used as a base to create specific testplans for individual injector part numbers (see
Section 4.5).
With experience you will build up knowledge of injector operation and possible faults. The following
general guidelines apply if you are testing a set of 4 unknown injectors:

4.4.1 Response Time

The faster the response time the better. Any injector whose response time is more than 100s longer
than the others is likely to cause engine problems.
NOTE: During the metering cycle the backpressure in the delivery line will fluctuate slightly causing
the response time results to fluctuate by up to 10s. To view results under the most stable
conditions, switch off delivery metering.
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Any technical intervention requires certified Hartridge training. Contact Hartridge Ltd for details.
After changing the test conditions, allow a minute or so for the system to
Figure 4.6: Stop Test Dialog
HARTRIDGE LIMITED
HL030(EN), Issue 1, June 2005