Hanna Instruments HI 4421 - Manuals

Page 5 - F U N C T I O N A L D E S C R I P T I O N

5 HI 4421 DESCRIPTION FRONT PANEL REAR PANEL 1) Liquid Crystal Display (LCD)2) Main Keyboard3) USB connector4) ON/OFF switch5) Power adapter socket6) RS232 serial communication connector7) DO probe input F U N C T I O N A L D E S C R I P T I O N F U N C T I O N A L D E S C R I P T I O N F U N C T I ...

Page 8 - O P E R A T I O N A L G U I D E

8 POWER CONNECTION Plug the 12 Vdc adapter into the power supply socket. Note: These instruments use non volatile memory to retain the meter settings, even when unplugged. PROBE CONNECTION For DO, BOD, OUR or SOUR measurements connect a DO probe to the DIN connector located on the rear panelof the i...

Page 9 - D I S P L A Y I N G M O D E S

9 For each measurement mode (DO, BOD, OUR or SOUR) the following display configurations are available:Basic, Good Laboratory Practice (GLP), Graph and Log History. Basic Accessing this option, the measured value and its units aredisplayed on the LCD, along with the temperature value, tempera-ture co...

Page 11 - Log History

11 Log History Accessing this option, last logged records will be displayed on the LCD. The log history list also contains the appropriate DO / BOD / OUR / SOUR values, the logged temperature, the temperature source, as well as the records time stamp.To access the Log History displaying mode:• Press...

Page 35 - calibration is needed.; At; incorrect

35 D O C A L I B R A T I O N D O C A L I B R A T I O N D O C A L I B R A T I O N D O C A L I B R A T I O N D O C A L I B R A T I O N It is recommended to calibrate the instrument frequently, especially if high accuracy is required.The DO range should be recalibrated:• Whenever the DO probe is replac...

Page 38 - D O M E A S U R E M E N T

38 Make sure the instrument has been calibrated before taking DO measurements. DIRECT MEASUREMENT To measure the DO of a sample using the Direct reading mode:• Press and then to select DO measure mode. • Select the Direct reading mode (see DO Setup). • Submerge the DO probe and tap it repeatedly to ...

Page 39 - SALINITY COMPENSATION; Note

39 SALINITY COMPENSATION If the sample contains significant concentration of salinity, the read out values must be corrected, taking intoaccount the lower degree of oxygen solubility in this situation.Before taking any DO measurements remember to set the salinity value from the DO setup menu.The sal...

Page 40 - BAROMETRIC PRESSURE COMPENSATION

40 BAROMETRIC PRESSURE COMPENSATION The dissolved oxygen saturation value varies with pressure, so it is important to compensate the effect thatpressure has on DO measurements. C º l e v e L a e S e v o b a s r e t e M , e d u ti tl A F º 0 m 0 0 3 m 0 0 6 m 0 0 9 m 0 0 2 1 m 0 0 5 1 m 0 0 8 1 m 0 0...

Page 47 - L O G G I N G

47 This feature allows the user to log DO, BOD, OUR, SOUR and temperature. The logging behaviour is dependent on the Logging Type and Reading Mode (DO only) options from the parameter setup. The Logging Data Configuration options from the appropriate parameter setup must be set first in order to be ...

Page 48 - LOGGING MODE 2

48 • Press to enter log interval edit menu and use or to adjust the logging start-stop time or the log sampling. Press to save the current value and use or to adjust next / previous parameter. • Press to exit log interval edit menu and then press to save the current log. • While the instrument is sa...

Page 55 - RECOMMENDATIONS FOR USERS

55 RECOMMENDATIONS FOR USERS Before using these products, make sure they are entirely suitable for the environment in which they are used.Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV equipment,requiring the operator to follow all necessar...