BASIC PH METER 840087 Instruction Manual SPER SCIENTIFIC LTD.
TABLE OF CONTENTS I. INTRODUCTION ............................................................................. 3 II. PANEL DESCRIPTION .................................................................. 4 III. OPERATING INSTRUCTIONS A. PH CALIBRATION PROCEDURE .......................................... 5 B. MEASUREMENT PROCEDURES ........................................... 5 C. BATTERY REPLACEMENT ..................................................... 6 D. TROUBLE SHOOTING ................................
II. PANEL DESCRIPTION 5 1 2 9 4 3 7 6 8 1. LCD Display 4. HOLD Button 7. Cal. PH7 2. ON Button 5. pH BNC Input Socket 8. Battery Compartment 3. OFF Button 6. Slope PH4/PH10 Adj. 9.
III. OPERATING INSTRUCTIONS A. PH CALIBRATION PROCEDURES The meter is factory calibrated to simulate the ideal pH electrode (0 mV at pH 7.00 and 177.4 mV at pH4, based on an ambient temperature of 77°F/25°C ). Follow the two-point calibration procedures to ensure the highest degree of accuracy. Two Point Calibration 1. Connect the pH electrode to the BNC SOCKET. 2. Press the ON button and place the pH electrode into the pH7 solution. 3. Using a small screw driver, turn the CAL.
C. BATTERY REPLACEMENT 1. Replace the battery when the low battery icon is displayed in the left corner of LCD. In-spec measurements may be made for several hours after the low battery indicator appears. 2. Slide the battery cover away from the instrument, remove the battery and replace with a 9V battery (alkaline or heavy duty type). 3. Close the battery cover. D. TROUBLE SHOOTING If you pH meter malfunctions, follow these steps to pinpoint the problem. 1.
IV. SPECIFICATIONS Display LCD, 1/2” (21.5 mm ) digit height Input Impedance 1012 ohm Measurement Range 0 ~ 14 pH X 0.01 pH Resolution 0.01 pH Accuracy ± 0.07pH (pH5 ~ pH9) ± 0.2pH (pH9) Meter only, after calibration and including error for temperature at 64 ~ 82°F (18 ~ 28°C) Ph Calibration External pH4 (slope adjustment) and pH7 Cal. adjustment PH Electrode Any pH electrode with a BNC connector Operating Temperature 32 ~ 122°F (0 ~ 50°C ) Operating Humidity Max.
5 YEAR METER WARRANTY Sper Scientific warrants this product against defects in materials and workmanship for a period of five (5) years from the date of purchase, and agrees to repair or replace any defective unit without charge. If your model has since been discontinued, an equivalent Sper Scientific product will be substituted if available. This warranty does not cover probes, batteries, or damage resulting from accident, misuse, or abuse of the product.
