User manual HANNA INSTRUMENTS HI 9032

[. . . ] Instruction Manual HI 9032 Microprocessor Bench Conductivity/TDS/NaCl Fertilizer/°C/°F Meter with RS 232 These Instruments are in Compliance with the CE Directives http://www. hannainst. com Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for the correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications. This instrument is in compliance with CSA, UL (EN 50081-1 and EN 50082-1) direcand tives. [. . . ] display to prompt the selection of the calibration temperature value. ENTER · · · Take the temperature of the solution with a Checktemp or a glass thermometer. Enter the correct buffer temperature value by using the numeric keys and press ENTER to confirm the temperature setting. Continue the procedure as for calibration with ATC, but without temperature probe connection. INITIAL PREPARATION Rinse the probe thoroughly in distilled water. This is to minimize contamination of the calibration solution and secure higher accuracy. Pour a small quantity of HI7037 Standard solution into a plastic beaker or any other solution to be used as 100% reference. When possible, use plastic beakers to minimize any EMC interferences. PROCEDURE WITH ATC · Press the NaCl key to enter the sea water percentage mode, and the "NaCl" symbol will appear on the large display. NaCl NaCl % 9 · Press CAL and the LCD will display "100. 0%". % CAL NaCl CAL · Press the ENTER key and immerse the HI7686 probe into the calibration solution submerging the holes of the sleeve into 31 ENTER 30 the liquid. Immerse the HI 7669/2W temperature probe as close as possible to the conductivity probe. Wait for 2 or 3 minutes for the thermal equilibrium. % Notes: · If the temperature probe is not connected to the meter, once the selected buffer value is confirmed, "25°C" or "77°F" will start blinking on the TEMP. display. · If the buffer is within 39 and 49 mS, the " " symbol stays still. BUF NaCl CAL BUF Enter the sample temperature value using the numerical keys and press the ENTER key to confirm the temperature setting. % ENTER · If the " " starts blinking, wait for approximately 30 seconds for the reading to stabilize. Now the calibration procedure is complete. · To quit from the calibration mode, press the CAL key. CAL NaCl CAL BUF · · Once the reading is stable the " " symbol goes off and CON prompts the user to confirm the reading. % To clear the numeric data entry, press the CLEAR key. PGM Clear NaCl CON BUF PROCEDURE WITHOUT ATC (MTC) · If you need to calibrate without ATC, press the ATC/MTC key and the decimal point will blink on the TEMP. LCD (both in the Celsius and in the Fahrenheit scale). ATC MTC 0 · Press the CON key to confirm the calibration. CON · The instrument is now calibrated and returns to normal operation. During calibration once the selected buffer value is confirmed, "25°C" or "77. 0°F" will start blinking on the TEMP. display to prompt the selection of the calibration temperature value. 32 33 · · · Take the temperature of the solution with a Checktemp or a glass thermometer. Enter the correct buffer temperature value by using the numeric keys ENTER and press ENTER to confirm the temperature setting. Continue the procedure as for calibration with ATC, but without temperature probe connection. FERTILIZER CALIBRATION INITIAL PREPARATION Dissolve 1 g of the fertilizer to be used in 1 L of distilled water. Rinse the probe thoroughly in distilled water. This is to minimize contamination of the calibration solution and secure higher accuracy. When possible, use plastic beakers to minimize any EMC interferences. Fert. PROCEDURE WITH ATC 8 · · · Press the Fert key button to enter the fertilizer #1 mode. Leave the conductivity probe to dry in the air. Using a small screwdriver adjust the OFFSET trimmer on the rear panel until the reading is "0. 00 gm". gm FERTILIZER · Press the CAL key and "1. 00 gm" will blink on the primary LCD to prompt the user to select the calibration buffer value. The "CAL" symbol will also be displayed. CAL FERTILIZER gm CAL 34 35 · · · · Pour a small quantity of the prepared fertilizer solution into a plastic beaker. Immerse the HI7686 probe into the solution submerging the holes of the sleeve into the liquid. [. . . ] For this reason great care while handling the probe must be payed. CHANGING THE COMMAND PREFIX These commands may be sent with either capital or small letters. The characters sent by HI 9032 are always capital letters. SPECIFICATIONS · Serial interface compatible with RS232 levels. · 8 - bit data trasmitted, one start bit, one stop bit, no parity. · 8 - bit data received, no parity checking, one start and one stop bit. [. . . ]