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Summary of Contents for Tru-Test EC-20
- Page 1 USER GUIDE TRU-Tesr. EC-20 Plate Meter...
- Page 2 Mt Wellington Pakuranga Auckland 1060 Manukau 2140 New Zealand New Zealand All trademarks with an * are neither owned by nor licensed to Tru-Test Limited and belong to their respective owners. Tru-Test Limited, 2018. All rights reserved. 832994 Issue 1 01/2018...
- Page 3 Introduction ....................1 Assembly instructions................... 2 Operating the plate meter ................4 Battery ......................5 Testing to see whether Zero Calibration is required ........5 Zero calibration ................... 6 Fault finding ....................7 Warranty and servicing ................8...
- Page 5 Congratulations on the purchase of your Tru-Test EC-20 Plate Meter (plate meter). This plate meter is a high precision engineered device for measuring the average height of pasture relative to density of the pasture. This is directly relative to the quantity of dry matter present (kilograms of dry matter –...
- Page 6 The plate meter is supplied in three parts: The heavy duty plastic plate sits on top of the pasture to establish average height and density. The area of the circle and weight of the plate have been carefully calibrated. The grooved rod allows pasture to be measured in 0.5 cm intervals (clicks). The yellow shaft includes the electronic meter.
- Page 7 With your other hand, screw on the plate, making sure that the smooth side of the plate is uppermost (ribbed side closest to the meter). Turn the plate meter the correct way up (plate down) and place it on the ground. The grooved rod will protrude out of the shaft.
- Page 8 The plate meter is switched on and off using the black switch at the back of the unit. Off is in the ‘down’ position. When the plate meter is off, there are no numbers displayed on the LCD screen. The plate meter will turn off automatically after 15 minutes if it is left on, and is not in use.
- Page 9 The product consumes about 10 to 20 mA when on, depending on the battery voltage and whether it is beeping. This could be used to estimate run times on rechargeable NiMh battery packs. The “Battery Status” LED shows green for the first half of the battery life. As the battery becomes weaker, the LED will gradually change to orange, and then to red when it is at 6 V.
- Page 10 To zero out the potentiometer: Locate the zero adjustment screw (beside the On/Off switch). Remove the protective rubber bung by levering it out gently using a flat-bladed screwdriver. Insert the flat-bladed screwdriver into the slot. Turn anti-clockwise gently until the potentiometer stops turning.
- Page 11 Most problems are due to the plate meter being out of calibration (see following points as to why). If in doubt it is worth Zero Calibrating just to make sure it is correct. This means that the plate meter does not know where the bottom is and therefore does not record the reading.
- Page 12 For warranty and servicing information, see www.livestock.tru-test.com/product-warranty For all support, phone 0800 AGDATA (0800 243282)
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