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Summary of Contents for Apera Instruments GroStar GS4 Premium
- Page 1 GroStar™ GS4 Premium pH/EC Pen Tester User Manual APERA INSTRUMENTS (Europe) GmbH www.aperainst.de...
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Page 2: Table Of Contents
Thank you for choosing the Apera GroStar™ GS4 Premium pH EC Pen Tester. This premium pen has been designed specifically for the horticultural market. Since 1991, Apera instruments has been dedicated to providing hi-tech, accurate, lab-grade instruments and sensors. GroStar's intelligent design reduces the guesswork so you can easily manage your crops success. - Page 3 Short Press Long Press 3-Color LCD Screen 1. Power on 2. Manual hold • White for measurement mode Power off Press again to • Green for calibration mode cancel hold. • Red for calibration error measurement Start mode, press to stands for stabilized calibration turn on/off the...
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Page 4: Preparation Before First Use
Preparation Before First Use Pull out the battery insulation slip, and take off the probe cap. Rinse off the probe in clean water, then shake off excess water. Calibrate pH and EC. For calibration tutorial, refer to Section 3 and Section 4. If you find the probe cap is dried out, soak the probe in 3M KCL soaking solution for 5 minutes before use. - Page 5 Hold until screen turns green. The pen starts automatic calibration. Wait for "Good" to show up (in 10-15 seconds), indicating the calibration is completed, then the pen returns to measurement mode. Short press any key while calibrating (in green screen) to cancel calibration and return to measurement.
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Page 6: Ph Measurement
pH Measurement Power on and remove the probe cap. Rinse the probe with clean water and shake off excess water. Fully submerge the probe into the solution at least 1 inch deep, make a quick stir to remove potential air bubbles around the probe. -
Page 7: Ec/500Ppm/700Ppm Measurement
EC/500ppm/700ppm Measurement Power on and remove the probe cap. Rinse the probe with clean water and shake off excess water. Submerge the probe into the solution, make a quick stir to remove potential air bubbles around the sensor. Hold still and wait for the reading to stabilize ( stays on the screen), then record the reading. -
Page 8: Probe Cleaning
Probe Cleaning The tester is only as accurate as the probe is clean. Always thoroughly rinse off the probe before and after each measurement with clean water in a container or with a wash bottle. For tough contaminants, remove the sensor shield, soak the probe in Apera’s cleaning solution or detergent water for 30 minutes. -
Page 9: Battery Replacement
10 Battery Replacement ① Pull up the battery cap (might take some force). ② Slide the battery cover along the OPEN arrow to open the cover. ③ Open the battery cover. ④ Insert the batteries (ALL POSITIVE SIDES FACING UP). ⑤... -
Page 10: Troubleshooting Guide
12.4 Never test oily liquids. 12.5 Make sure the battery cap is completely closed with the O-ring. Otherwise, the waterproof rating could be compromised. 13 Troubleshooting Guide Trouble Reason How to fix Power on the tester, calibrate pH 7 first, then pH 4. Incorrect calibration After pH 4 is calibrated, if you want to calibrate pH 7 order... -
Page 11: Technical Specs
Aged probe Replace the probe. Air bubbles around the Make a quick stir in the solution to remove air bubbles. sensor Clean the probe with cleaning solution, then soak it in Calibration is Clogged junction 3M KCL soaking solution overnight successful, but reading is not To compare with other testers, make sure to perform a... -
Page 12: What's In The Box
Warranty Two years for the instrument, one year for the probe Low-resistance lithium glass membrane, double-junction, pH probe blue gel electrolyte EC probe Titanium alloy Successful calibration M (7.00 pH/2.77 EC), L (4.00 pH), H (10.01 pH) indicators Low battery reminder Waterproof rating IP67 Reading stabilization icon... -
Page 13: Warranty
Warranty How Long Does the Coverage Last? Apera Instruments® (Apera) warrants the GroStar™ GS4 Premium pH/EC Combo Pen Tester (Product) for a period of 24 months for the instrument and 12 months for the probe from date of purchase by original purchaser or consumer. Proof of purchase is required for the warranty to be effective (store sales receipt for Product showing model number, payment, and date of purchase). - Page 14 PROFITS, PERSONAL INJURY OR PROPERTY DAMAGE. IT IS UNDERSTOOD AND AGREED BY CONSUMER UPON PURCHASE OF A PRODUCT THAT, EXCEPT AS STATED IN THIS WARRANTY, APERA INSTRUMENTS IS NOT MAKING AND HAS NOT MADE ANY EXPRESS OR IMPLIED WARRANTY OR OTHER...
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