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Chapter 7 Calibration
64 Hydro-View / Hydro-Hub User Guide HD0864 Rev 1.0.0
3 Calibration Procedure
The following procedure details the process for calibrating a sensor in mineral based materials. If
calibrating to organic products or substances that contain volatile material the locally recognised
standards for testing must be followed. The recoding of the sensor value and collection of the
samples is the same for all materials.
3.1
Equipment Required
To collect calibration samples the following equipment is required:
• Microwave oven
• Weigh scales 2kg accurate to 0.1g
• Microwave safe bowls
• Metal spoon
• Heat proof gloves and eye protection
• Heat resistant mat, placed on the scales to protect it from the heat of the bowl
3.2
Collecting Samples
To collect samples and record the associated Average Unscaled values from the sensor follow
the procedure detailed below:
1. Connect to the sensor and open the calibration section.
2. Create a new calibration by clicking New and enter a name into the calibration name
text box and clicking OK.
Figure 103: New Calibration
3. If automatic averaging, using the bin gate signal, is in use confirm that ‘Averaging’ is
displayed on the Points page when the bin gate opens and ‘Hold’ is displayed when the
gate is closed. If manual averaging is to be used ensure that the averaging is only
started once the material is flowing and is stopped before the gate is closed or the flow
stops.
Note: If a bin gate is used to trigger the averaging the gate must not be jogged
after the main dose otherwise the averaging will be re-started.
4. Once the system has been checked and is confirmed to be working correctly, take a
sample of the material. Using a suitable collection method collect a series of small
samples from the flow of the material, aim to collect around 5kg in total of material. The
material must be collected at a position close to the sensor so the sensor reading relates
to the particular batch of material passing the sensor. At the same time the sensor must
be set to record the Average Unscaled. If the averaging is to be started manually press
“Start Averaging” as soon as the sample collection begins. Press “Stop Averaging” as
soon as the sample collection finished, ensure this is before the material flow stops.
5. Place all collected material in an air-tight bucket or bag to ensure no moisture is allowed
to escape.