93-520-20 Issue 3.3
Page 26 of 60
CirrusPro Engineer’s Manual
The buzzer is used to indicate the test is about to begin. This is a slow ‘pip’ for 10 seconds once the
delay is complete.
The countdown is shown on the display.
First test about to begin.
Second test about to begin.
The particles are now presented to the sample point and the timer counts showing the elapsed time.
Second test just complete.
Test 2 particles clearing.
When the unit detects the particles at Alarm levels the buzzer sounds a fast ‘pip’ and the timer stops.
The buzzer continues until the particles have cleared or Silence is pressed on the unit.
The test is complete when the particle level is returned below the alarm thresholds. The timeout delay
will start again until all the points have been tested.
The times recorded should correspond to the value given on the pipe calculation. If they do not, check
the pipe work and, possibly, the design.
The unit should now be assessed for Transport Time, Fire Sensitivity and performance
compared with that predicted by the pipe flow calculation. The operation of all outputs and
inputs should be verified.
When all the tests on a pipe have been completed the last line will show:
Transport time test complete
