Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
B - 24
9) When the reading is stable, press . The hourglass is displayed
while the instrument waits an additional 10 seconds for the readings to
settle.
10) Filter Opacity is displayed and the value is pre-set to 100%. If the
Transceiver was pointed into free space, or if the beam was completely
blocked, press . If a calibrated filter was used, set the opacity of the
filter with the and arrows and press
11) Zero Check is displayed while the instrument deploys and checks
the Zero Reflector.
12) Upscale Check is displayed while the instrument deploys and
checks the Upscale Filter. During this time, the values of the calibration
constants X and C are displayed, for use by Service Engineers.
13) The hourglass is displayed while the instrument retracts the Zero
Reflector and the Upscale Filter.
When the hourglass disappears, the Clear Stack Calibration is complete.
14) If you have an optional External Zero Device (EZD), it must be
recalibrated after performing a Clear Stack Calibration. Refer to Section
B5.9.
B5.5 Gravimetric Calibration (Isokinetic Calibration)
The Model 4500 MkIII measures the opacity of dust and smoke emissions.
As explained in the Reference section of the manual, this may be converted
to Dust Density using calibration constants. To determine these calibration
constants it is necessary to collect and weigh samples of the particulate
matter from the flue gases. This procedure must be carried out in accordance
with relevant USEPA Methods or CEN or ISO Standards. It is generally known
as Gravimetric or Isokinetic Sampling.
Model 4500 MkIII provides a facility to simplify collection of readings during
Gravimetric Calibration.
To record the Average Optical Density during a Gravimetric Test:
1) Press
2) Unlock
is displayed, press
3) Use the and arrows until the Supervisor code (Default: 10) is
displayed and press
4) Use the and arrows to select Calibrate and press
5) Use the and arrows to select Gravimetric Test and press
6) Start is displayed. When the Gravimetric Test is started, press
The display will show the Average Optical Density since the start of the
test.
7) Stop is displayed. When the Gravimetric Test is complete, press
The Average Optical Density during the last test is shown. Record the
value.