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The AM is part of the Dryer Master family of moisture monitoring and moisture control systems that have at their heart Dryer Master's stainless steel fin type capacitance based moisture sensors. These sensors were initially developed to drive Dryer Master's industry leading computerized moisture control systems, where they are placed at the inlet and the outlet of the dryer.
Moisture measurement technology The Dryer Master Moisture sensor measures the dielectric properties, in effect the capacitance of the product in the vicinity of the sensor fin. This method is the most effective in measuring the total water in a given volume of product.
Dryer Master Product Manual 2. System Overview The system is comprised of 2 key elements, the industry proven Dryer Master Moisture sensor and a Micro PLC with integrated touch screen information display. DRYER Ground cables Optional Instrumentation Printer cables 0 –...
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Moisture sensor. The supply may also be used to activate low voltage low current alarm devices or alarm contacts. On systems equipped with a Dryer Master Power supply the unit is capable of supplying 24Volts DC at up to 1 Amp and is current limited and designed to shut down in the event of a short circuit.
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Product Moisture display: Actual moisture of the product as detected by the Dryer Master Moisture sensor. Note this will indicate “Empty” when the sensor output is below critical trigger threshold either by being empty, not connected or moisture so low that reading is not possible.
Speeds are recorded and printed if the printer and compact flash option where ordered as part of the system. 3. “Automatic” – The normal or primary speed is also set from the Dryer Master AM . This is a semi automatic mode.
In all Automatic modes it is prudent for the operator to operate the dryer manually to attain the desired moisture, before selecting Automatic. It is important to monitor the operation and adjust the settings to permit the dryer and Dryer Master AM to operate effectively.
Figure 38. – Calibrate Sensor (Enhanced method) Sample Entry How calibration works: The purpose of calibration is to allow the Dryer Master moisture reading to easily mimic the manual tester. Periodic checks against a manual device ensure both are in approximate agreement. Please be sure the product moisture and product temperature are within the specification range for your manual tester.
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The enhanced method takes the guess work out of doing calibrations. With this method there is usually a Calibration Start push button located near the Dryer Master Moisture sensor where manual samples are taken. When this button is pressed a lamp will flash for the next 30 seconds.
Note the manual test value and the displayed moisture. 2) Calculate the difference. If the Dryer Master sensor was higher than the manual test. The offset value will need to be reduced by the calculated difference. If the Dryer Master sensor was lower than the manual test.
This section describes the connections directly to the display unit (PLC) for those intending to install the unit into an existing control panel. Continue to section 6.2 for wiring to the enhanced system with the display (PLC) already installed in the Dryer Master provided AM panel.
One Serial terminal printer c/w universal voltage power supply For those wishing to supply their own printer you will need the following: One Dryer Master MJ2-Rs232-9pinD adapter Your printer must be a serial printer and you will need to set your printer for Baud =9600, parity = none, data bits = 8, and stop bits =1.
There are no end user replaceable components in the sensor. If the sensor fails or cannot be setup as described on the diagnostics sheet it can be returned to Dryer Master for service. Contact Dryer Master for additional information.
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Sample Return Figure 101. –Moisture Sensor, Example of a bypass Chute Installations Dryer Master also offers a moisture sensor chute with a rotary feed (picture above right). There is more information on this chute in Appendix D. Caution: Placing the sensor in a location where it will not get the full flow may cause an excess of fines or trash to pass through the sensor and will contribute to errors or false readings.
It may seem that this chute design is inexpensive and an easy to design solution that should work for everything. In reality, Dryer Master in its 25 year life has seen many attempts of mechanical flow control not work. This metering method however does work very well for the Corn and Beans and some others natural products.
It may seem that this chute design is inexpensive and an easy to design solution that should work for everything. In reality, Dryer Master in its 25 year life has seen many attempts of mechanical flow control which do not work. This metering method however does work very well for the Corn and Beans and some others natural products.
Included in this section is a generic wiring diagram for a common motor speed control. If your motor speed control is different and you need guidance with the connections contact the Dryer Master Support Center for assistance. We usually are able to provide you with a more specific diagram for your particular motor speed control.
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