Apera Instruments 28APE190352/AI21040 User Manual Download Page 1 | Manualshive

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GroStar™

GS4 Premium pH/EC Pen Tester

User Manual

APERA INSTRUMENTS (Europe) GmbH

www.aperainst.de

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Summary of Contents for 28APE190352/AI21040

Page 1: ...GroStar GS4 Premium pH EC Pen Tester User Manual APERA INSTRUMENTS Europe GmbH www aperainst de...

Page 2: ...ically 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 s...

Page 3: ...which you should pour the soaking solution or sample solution For details of probe storage see Section 9 Premium pH EC Combo Probe Upgraded double junction blue pH sensor increased durability and eas...

Page 4: ...KCL soaking solution for 5 minutes before use 2 5 If the tester hasn t been used for a long time over 1 month please soak the probe in the 3M KCL soaking solution for at least 1 hour then calibrate i...

Page 5: ...up to the right of Calibrating pH 10 is usually not necessary unless your estimated target pH is greater than 8 0 pH 3 5 will disappear in 30 days after calibration reminding you to recalibrate the te...

Page 6: ...ential air bubbles then let it stand 5 2 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 p...

Page 7: ...of very high levels as delicate plants cuttings and seedlings can experience fertilizer burn if the conductivity is excessively high EC 500ppm and 700ppm are simply different units preferred by differ...

Page 8: ...in 9 Probe Storage 9 1 Under regular usage daily or weekly use make sure there are several drops 3M KCL soaking solution in the probe cap and tightly close the cap with the O ring 9 2 For long term st...

Page 9: ...ver Every probe will eventually age and fail even if you don t use it that often The typical service life of GroStar probes is 18 24 months depending on the frequency of usage and how well you keep it...

Page 10: ...s cleaning solution or detergent water Clogged junction Clean the probe with Apera s cleaning solution then soak it in 3M KCL soaking solution overnight Aged probe Replace the probe Testing pH of low...

Page 11: ...of operation Backlight White measurement Green calibration Red errors Reading hold Manual Calibration is successful but reading is not accurate Aged probe Replace the probe Air bubbles around the sens...

Page 12: ...terproof rating IP67 Reading stabilization icon 15 What s in the box 16 Accessories pH buffer Kit pH4 7 250ml each item AI1113 pH buffer Kit pH4 7 10 250ml each item AI1115 2 77 EC Standard Calibratio...

Page 13: ...his warranty does not apply to replacement of items subject to normal use wear and tear and expressly excludes Cosmetic damage such as stains scratches and dents Damage due to accident improper use ne...

Page 14: ...ES DO NOT ALLOW EXCLUSION OR LIMITATION FOR INCIDENTIAL OR CONSEQUENTIAL DAMAGES OR LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT BE APPLICABLE IF ANY P...

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