User manual HANNA INSTRUMENTS HI 98360

[. . . ] Instruction Manual HI 98360 Autoranging & Logging Portable Waterproof Microprocessor EC/TDS/NaCl/°C Meter w w w. c o m 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. [. . . ] This feature can be disabled by entering the setup mode and selecting the "AoF" item (see SETUP section for details). · TDS reading is obtained multiplying the EC reading by the TDS factor, which has a default value of 0. 50. It is possible to change the TDS factor in the 0. 40 to 0. 80 range by entering the setup mode and selecting the "tdS" item (see SETUP section). · When the use of an alternate function (RCL, FNC, CFM, FIXED, TC and AutoEnd) is requested, press and hold the ALT key first and then the second key. 9 AUTORANGING The EC and TDS scales are autoranging. The meter automatically sets the scale with the highest possible resolution. By pressing ALT+FIXED, the autoranging feature is disabled and the current range is frozen on the LCD. Note: Autoranging is automatically restored if the RANGE key is pressed, if the setup or calibration modes are entered and if the meter is turned off and back on again. MODE AUTO ENDPOINT MOD The Auto Endpoint feature allows the user to freeze the display, when a stable reading is reached (EC/TDS/NaCl and temperature range). The LCD will show the current reading together with a blinking "H" tag. When measurement becomes stable, the "H" symbol stops blinking and the measured value is frozen on the display. To exit this mode and return to normal operations, press again ALT +AutoEnd. Note: While in Auto Endpoint mode, current measurement (both stable and unstable) can be stored in the meter memory by pressing the LOG key. Note: While in Auto Endpoint mode, calibration mode can not be entered and it is not allowed to change the temperature compensation and the range options. 10 TEMPERATURE COMPENSATION Three options of compensating temperature are available: Automatic (Atc): The probe has a built-in temperature sensor; the value of the temperature is used to automatically compensate the EC/ TDS reading. Rinse the probe with some of the calibration solution or deionized water. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. The "CFM" indication starts blinking on the LCD asking for confirmation. If everything is satisfactory, the meter displays the "Stor Good" message and returns to measurement mode. Notes: · If the uncalibrated reading is too far from the expected value or the temperature value is out of 0 ­ 60°C range, calibration is not recognized. The "CFM" indication does not appear; the " " and "STD" symbols blink to signal wrong or contaminated calibration solution. If the temperature value is out of 0 ­ 60°C range, the "°C" tag will also be displayed blinking on the LCD. · For best results choose a calibration value close to the sample to test. · In order to minimize the EMC interferences, use plastic beakers. · The meter uses 1. 90%/°C compensation factor during calibration. [. . . ] Backlight is automatically disabled and it is not possible to enable it until new batteries are inserted or an external power adapter is used. When the battery symbol appears, batteries have typically 10% of their life left and the meter is still measuring properly. · Very weak battery - The meter shuts off to avoid erroneous operations. Battery replacement must only take place in a non-hazardous area using 1. 5V alkaline AA type batteries. [. . . ]