User manual HANNA INSTRUMENTS HI 98186

[. . . ] Instruction Manual HI 98186 Dissolved Oxygen BOD/OUR/SOUR Meter HI 98186 Dissolved Oxygen Meter w w w. c o m 1 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 the necessary information for correct use of the instrument, as well as a precise idea of its versatility. [. . . ] · If the DO value measured by the instrument is not close to the selected standard, the "Wrong standard" error message will be shown on the display and the calibration can't be confirmed. · While in manual calibration mode it is possible to return to the automatic calibration mode by pressing the AUTO functional key. The meter will select the standard that is closest to the current DO reading. 31 GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding DO calibration is stored for the user to review when necessary. EXPIRED CALIBRATION The instrument is provided with a real time clock (RTC), in order to monitor the time elapsed since the last DO calibration. The real time clock is reset every time the instrument is calibrated and the "expired calibration" status is triggered when the instrument detects a calibration time out. The "CAL" "DUE" tags will start blinking to warn the user that the instrument should be recalibrated. The calibration time out can be set (see SETUP for details, page 33) from 1 to 7 days or can be disabled. For example, if a 4 days time out has been selected, the instrument will issue the alarm exactly 4 days after the last calibration. However, if at any moment the expiration value is changed (e. g. to 5 days), then the alarm will be immediately recalculated and appear 5 days after the last calibration. Notes: · When the instrument is not calibrated or the calibration is cleared (default values loaded) there is no "expired calibration", and the display always shows the "CAL" "DUE" tags blinking. · When an abnormal condition in the RTC is detected, the instrument forces the "expired calibration" status. LAST DO CALIBRATION DATA The last DO calibration data is stored automatically after a successful calibration. To view the last calibration data, press GLP when the instrument is in the DO, BOD, OUR or SOUR measurement mode. The instrument will display a lot of data including calibration standard, salinity, pressure and temperature. Note: "Not user calibration" message is displayed if the calibration was cleared or the instrument hasn't been calibrated for dissolved oxygen. 32 SETUP Setup mode allows viewing and modifying the measurement parameters. The following table lists the SETUP parameters, their valid range and the factory default settings. Item Description Valid Value Calibr. Time-out Number of days after Disabled, 1 to 7 days calibr. warning is displayed Salinity The solution's salt content 0 to 70 g/L BOD Configuration -Sample min The minimum diff. between 0. 00 to 50. 00 mg/L delta DO the start and the end DO val. -Sample min The minimum end DO value 0. 00 to 50. 00 mg/L end DO -Seed min The minimum diff. between 0. 00 to 50. 00 mg/L delta DO the start and the end DO val. -Seed min The minimum end DO value 0. 00 to 50. 00 mg/L end DO OUR Configuration -Min time The minimum time for the 1 to 3600 sec. [. . . ] This semipermeable membrane isolates the sensor elements from the environment but allows oxygen to enter. If any dirt is observed on the membrane, rinse carefully with distilled or deionized water. If any imperfections still exist, or any damage is evident (such as wrinkles or tears-holes), the membrane should be replaced. Make sure that the O-Ring sits properly in the membrane cap. ACCESSORIES ChecktempC ChecktempF HI 7040M HI 7040L HI 7041S HI 710005 HI 710006 HI 76407/2 HI 76407/10 HI 76407/20 HI 76407A/P HI 92000/16 HI 92000/32 HI 920010 HI 920010/9 Electronic thermometer (range: -50. 0 to 150. 0 °C) Electronic thermometer (range: -58. 0 to 302 °F) Zero Oxygen Solution, 230 mL Zero Oxygen Solution, 460 mL Refilling Electrolyte Solution, 30 mL 115Vac to 12Vdc converter 230Vac to 12Vdc converter Spare probe with 2 meters (6. 7') cable Spare probe with 10 meters (33') cable Spare probe with 20 meters (67') cable 5 spare membranes Windows® 3. 11 compatible software application Windows® 95 compatible software application 25-pin PC connection cable 9-pin PC connection cable 66 RECOMMENDATIONS FOR USERS Before using these products, make sure they are entirely suitable for the environment in which they are used. [. . . ]