TeeJet SENTRY 6510 - Manual (Page 17)

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990-630-EN R0
Sentry 6510 Capacity Monitor
Storage of values
When + or - is pressed, the gain for both graphs are saved to the monitor. When the monitor is turned off, these gain values are preserved.
When the monitor is restarted, it begins working at the gain settings applied before power off.
Supply voltage monitoring
The monitor constantly checks to ensure that the power supply voltage is between 8-16 Volts.
A supply voltage outside of this range could cause inaccurate readings. If the voltage is outside of this range, the bottom LED on each graph
will flash, the top LED on each graph will be continuously lit and the monitor will cease reporting grain loss readings.
When the supply voltage returns to the acceptable range, the monitor will return to normal operating and grain loss reading resumes.
Speed compensation
This monitor can be used without a speed sensor. Without a speed sensor, the monitor automatically assumes a speed of 5 km per hour. The
grain loss is reported as a “loss per time” value, and this mode of operation is known as a “Grain Loss Monitor”.
As the speed of a combine harvester increases, the frequency of grain striking the loss sensors increases, which can lead to an inflated “loss
per time” value.
When the monitor is connected to a speed sensor, the monitor automatically compensates for the measured forward speed, so that the
indicated loss remains constant for the area covered.
In this case, the grain loss reported is a “loss per area” value, and this mode of operation is know as a “Capacity Indicator”.
The monitor automatically detects the type of speed sensor connected. No speed sensor calibration is needed.
The monitor supports these sensor ranges:
• Wheel sensors with resolution from 50 impulses/100 m to approximately 150 impulses/100 m, for a speed range of 1 km/h to 25 km/h.
Speeds below 1 km/h report as 1 km/h.
• GPS or radar sensors with resolution of 10000 impulses/100 m to approximately 15000 impulses/100 m, for a speed range of 1 km/h to
25 km/h. Speeds below 1 km/h report as 1 km/h.
NOTE: If no speed impulses are received for eight seconds, the monitor will switch to “loss per time” mode and will assume a speed of
5 km/h. GPS or radar sensors at speeds below 0.4 km/h may provide unstable readings.
To preserve accuracy of grain loss readings, do not use sensors with lower resolutions than indicated above. It is possible to use sensors with
higher resolutions, but this may result in artificially limited maximum usable speeds.
Sensor sensitivity, position and cleaning
In most cases, the straw walker sensor sensitivity should not be changed from the NORM position. If a crop has exceptionally large seeds,
sensitivity may be adjusted to MIN, or if the crop has exceptionally small seeds, sensitivity can be adjusted to MAX, but in general it is
preferable to control the readings with the gain on the monitor.
Move the sieve sensor among the slots in the brackets in order to keep the sieve sensor in the loss stream.
Sensors often become covered in a layer of dirt during use, particularly when harvesting green or moist crops. Clean this dirt from the sensor
with hand cleaner as often as required.