Instruction Manual pH 5+, pH 6+, Ion 6+6. SPECIFICATIONSModel pH 5+ pH 6+ Ion 6+Ion Range 0.01 to 0.99; 1.0 to 199.9; 200 to 1999 Resolution 0.01 / 0.1 / 1 Accuracy ± 1 % full scale Calibration Points 2 or 3 consecutive points;(0.1, 1.0, 10.0, 100.0, 1000) pH Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy ± 0.01 pH Slope Range 80 to 120% Calibration Points 2 to 5 points Buffer Groups1.68, 4.01, 7.00, 10.01, 12.45 (USA)1.68, 4.01, 6.86, 9.18, 12.45 (NIST)4.10, 6.97 (Pb) Temperature Range 0.0 to 100.0 oC Resolution 0.1 oC Accuracy ± 0.5 oC Compensation Automatic / Manual (0 to 100 oC) Millivolt Range -1000 to +1000 mV Millivolt Range -500 to 500 mV Resolution ± 1 mV;± 0.1 mV between –200 to 200 mV Accuracy ± 2 mV;± 0.2 mV between –200 to 200 mV FeaturesAuto-Buffer Recognition YesHold Function “HO”Auto Shut Off After 17 minutesLow Battery Indication “LO”Operating Temperature 0 to 50 oCPower Requirements (4) x 1.5V AAA Alkaline Batteries (included)Battery Life 500 hoursMeter Dim./Weight 15.7 x 8.5 x 4.2 cm / 255 g17