PWT HI98308 Pure Water Tester with Automatic Temperature Compensation OPERATION: · Remove the protective cap. · Turn the PWT on. · Immerse it in the solution to be tested without exceeding the maximum immersion level. HOW TO USE THE CHART: · The following diagram shows the relation between conductivity (µS/cm) and NaCl concentration (mg/L) of a watery solution. · Stir gently and wait for the reading to stabilize. PWT automatically compensates for temperature variations. BEPS AND BATTERY REPLACEMENT: PWT is supplied with BEPS (Battery Error Preventing System) which avoids any erroneous reading due to low batteries level, by switching the meter off. To replace the batteries, slide off the battery compartment cover and replace all four 1.5V batteries while paying attention to their polarity. · The reading on display is directly expressed in µS/cm unit. CALIBRATION: · Immerse the PWT in the HI70033 calibration solution, without exceeding the maximum immersion level. · Allow the reading to stabilize and with a small screwdriver turn the calibration trimmer until the display shows "84.0". Batteries should only be replaced in a nonhazardous area using the battery type specified in this instruction sheet. ONE YEAR WARRANTY AND SERVICEABLE: Covered by one year warranty against defects in workmanship and materials, this tester is now completely serviceable. Contact your dealer for further information. The PWT is in compliance with the CE directives. Visit our Internet Home Page: http://www.hannainst.com Manufacturers since 1978 PWT HI98308 Pure Water Tester with Automatic Temperature Compensation SPECIFICATIONS: RANGE 0.0 99.9 µS/cm RESOLUTION 0.1 µS/cm ACCURACY (@20°C/68°F) ±2% f.s. TYPICAL EMC DEVIATION ±2% f.s. CALIBRATION Manual, at 1 point through trimmer CAL. SOLUTION HI70033 (84.0 µS/cm) TEMPERATURE 0 to 50 C (32 to 122ºF) COMPENSATION with ß=2%/ C typical ENVIRONMENT 0 to 50 C (32 to 122 F); 95% RH not condensing BATTERY TYPE 4 x 1.5V alkaline (included) BATTERY LIFE approx. 250 hours of continuous use DIMENSIONS 175 x 41 x 23 mm (7.9 x 1.8 x 1") WEIGHT 78 g (2.7 oz.) ELECTRODE REPLACEMENT: The electrode is built-in inside the plastic casing and can be easily replaced in the following way: · Slide off the battery cover. · Remove the screw on the back of the PWT located below the battery compartment and slide off the whole internal part of the tester. Internal circuit: · Fasten the screw on the back, below the battery compartment. · Replace the built-in electrode with a new HI73308. ACCESSORIES: HI 70033P 84 µS/cm calibration kit (25 x 20 mL sachets) HI 7033M 84 µS/cm calibration solution (230 mL bottle) HI 73308 Probe for PWT HI 731326 Calibration screwdriver (20 pcs) · Before reinserting the internal circuit into the new plastic casing, make sure the O-rings (2) of the temperature sensor (3) are properly seated (see drawing). To avoid bending the connections to the conductivity sensors (1), do not apply excessive force while inserting the circuit. In case of any problem, reslide and reinsert it. · Reinsert the battery compartment cover. · Recalibrate the PWT before performing new measurements. ISTPWTR1 07/01 ...