NTZ-COMBI1 Version1.6
pH/Conductivity Portable Meter
Manual
NTZ-COMBI1 Portable pH/Cond. Meter
Страница 1: ...NTZ COMBI1 Version1 6 pH Conductivity Portable Meter Manual NTZ COMBI1 Portable pH Cond Meter ...
Страница 2: ...er defined calibration 9 4 5 Sample test 9 4 6 pH electrode maintenance 11 5 mV value measurement 12 5 1 Notes 12 6 Conductivity Measurement 12 6 1 Conductivity electrode information 12 6 2 Conductivity calibration 13 6 3 Conductivity calibration 14 6 4 Customer defined calibration 15 6 5 Sample test 15 6 6 Conductivity electrode maintenance 16 7 Parameter setting 16 7 1 Main menu 16 7 2 Submenu 1...
Страница 3: ...icroprocessor based portable meter features automatic calibration automatic temperature compensation function set up self diagnostics automatic power off and low voltage display The meter s digital filter improves measurement speed and accuracy There is reading stability display The package includes portable case meter probes standard solutions and all accessories convenient to use in field The me...
Страница 4: ...MER mV Range 1 000mV Resolution 1mV Accuracy 0 1 FS 1digit Conductivity Range Conductivity 0 200 mS cm divided into four ranges 0 199 9 µS cm 200 1999 µS cm 2 00 19 99 mS cm 20 0 199 9 mS cm Resolution 0 1 1µS cm 0 01 0 1 mS cm Accuracy 1 0 FS 1digit Temperature compensation 0 80 manual or automatic Electrode constant 0 1 1 10 cm 1 Multi point calibration 1 4 point Standard solution 84 µS cm 1413 ...
Страница 5: ... of pH and conductivity calibration value appears with 7 7 pH and conductivity calibration value appears with 6 and prompts of special display mode 8 Temperature value appears with 5 and prompts of special display mode 9 Temperature compensation icons ATC automatic temperature compensation MTC manual temperature compensation 10 Calibration guide icon 11 Stability icon of readings 12 Low battery ic...
Страница 6: ...s and descriptions Keypad Operations Descriptions Momentary press In the power off mode press this key to turn on the meter Long press In the measurement mode press and hold this key for 2 seconds to turn off the meter Momentary long press COMBI1 pH Conductivity meter press this key to select measurement mode pH mV COND In the mode of manual temperature compensation MTC when press and hold this ke...
Страница 7: ... temperature probe 3 4 Reading stability display mode When the measuring value is stable smiley icon appears on LCD see Diagram 3 If the smiley icon does not appear or flash please do not get the reading value or make calibration until the measuring value is stable Per parameter P1 6 there are 3 criteria for stability standard Normal High and Low The factory default is set Normal High is set for s...
Страница 8: ...ndard solution then select other standard solution to perform the second and the third point calibration See chart 4 During the calibration process the instrument displays the electrode slope of acidity range and alkalinity range respectively Chart 4 Three point calibration mode USA standard NIST standard Icons Suited range One point calibration 7 00 pH 6 86 pH Accuracy 0 1pH Two point calibration...
Страница 9: ... for a long period of time b After measuring acids pH 2 or alkaline solutions pH 12 c After measuring a solution that contains fluoride or a concentrated organic solution d If the solution s temperature differs greatly from the calibration solution temperature ...
Страница 10: ...efly and allow it to stay in the buffer solution until a stable reading is reached The meter s display will show scanning and locking process of calibration buffer solution at the bottom right of LCD When the meter locks 4 00 pH stable icon displays on LCD Press key to calibrate the meter End icon and electrode slope of acidity range display after calibration is done meanwhile the meter s display ...
Страница 11: ...ow it to dry and submerge it in pH 6 50 buffer solution Stir the solution briefly and allow it to stay in the buffer solution until a stable reading is reached For automatic temperature compensation ATC the temperature value does not blink When press key the main value blinks Press key to adjust the main value to 6 50 then press key to calibrate the meter After calibration is done the meter goes t...
Страница 12: ...with new pH electrode Electrode zero electric potential out of range 60mV or 60mV 1 Check whether there are bubbles in glass bulb 2 Check whether pH buffer solution is correct 3 Replace with new pH electrode Electrode slope out of range 85 or 110 pH measuring range out of range 0 00 pH or 14 00pH 1 Check whether the electrode is suspended 2 Check whether the meter connects the electrode well 3 Che...
Страница 13: ... For best accuracy always keep the meter clean and dry especially the meter s electrode and electrode jack Clean with medical cotton and alcohol if necessary 4 6 2 Calibration buffer solution For calibration accuracy the pH of the standard buffer solution must be reliable The buffer solution should be refreshed often especially after heavy use 4 6 3 Protect glass bulb The sensitive glass bulb at t...
Страница 14: ... surface will get polluted which causes inaccurate measurement and slow response Please refer to the following methods to clean and activate ORP electrode a For inorganic pollutant submerge the electrode in 0 1mol L dilute hydrochloric acid for 30 minutes then wash it in pure water then submerge it in the soaking solution for 6 hours b For organic or lipid pollutant clean the platinum surface with...
Страница 15: ...2 88 mS cm 2 20 mS cm 111 9 mS cm 20 200 mS cm 6 2 2 Calibration intervals a The meter is calibrated before leaving the factory and can generally be used right out of the box b Normally perform calibration per month c For high accuracy measurements or large temperature deviation from the reference temperature 25 C perform calibration per week d Use conductivity standard solution to check whether t...
Страница 16: ...on 1 88 C 10 hydrochloric acid solution 1 32 C 5 sulfuric acid solution 0 96 C 6 2 7 Avoid contamination of standard solution Conductivity standard solution has no buffer Please avoid being contaminated during usage Submerge the electrode in standard solution before wash the electrode and allow it dry Please renew conductivity standard solution frequently especially for standard solution of low co...
Страница 17: ... LCD 6 4 3 When press key the measuring value blinks CUS icon appears at the right top of the screen Press key to adjust the measuring value to 10 50 µS cm and press key to calibrate the meter After the calibration is done the screen shows End icon and returns to the measurement mode For customer defined calibration the electrode calibration guide icons do not appear in conductivity measurement mo...
Страница 18: ...ase note once set the factory default all the data deleted will not be retrievable 6 6 Conductivity electrode maintenance 6 6 1 Always keep the conductivity electrode clean Before taking a measurement rinse the electrode in pure water and then rinse it in the sample solution When submerge the electrode in solution stir the solution briefly to eliminate air bubbles and allow it to stay until a stab...
Страница 19: ... press key to enter in submenu P6 1 of basic parameter setting see Diagram 7 Diagram 7 Main menu and submenu of parameter setting P1 1 Select pH standard solution P1 4 Select resolution P1 5 Restore to factory setting P1 6 Set stability criteria P1 7 Temperature calibration P2 1 Select electrode constant P2 2 Select conductivity standard solution P2 5 Select reference temp P2 6 Adjust temperature ...
Страница 20: ...key No blinks press key Yes blinks press key to confirm the meter returns to the measurement mode No Do not restore Yes Restore to factory setting 2 Press key to enter in mode P1 6 or press key to return to the measurement mode P1 6 Set reading stability criteria Normal High Low 1 Press key nor blinks Press key Hi blinks then press key Lo blinks When parameter blinks press to confirm Nor Normal Hi...
Страница 21: ... press key to enter in P2 6 mode or press key to return to the measurement mode P2 6 Adjust temperature compensation coefficient 0 00 9 99 1 Press key 2 00 blinks press key to adjust temperature compensation coefficient 0 00 9 99 press key to confirm 2 After confirm the parameter press key to enter in mode P2 8 or press key to return to the measurement mode P2 8 Restore to factory setting No Yes 1...
Страница 22: ... Press key On blinks press key Off blinks When parameter blinks press key to confirm On turn on automatic power off Off turn off automatic power off 2 After confirm the parameter press key to return to the measurement mode 8 Meter Kits The kit includes COMBI1 portable ph conductivity meter PH probe EC temp probe ORP probe Tissues Ph4 buffer solution Ph7 buffer solution Ph10 buffer solution 650mV O...
Страница 23: ...arameter setting Factory default setting Modes Prompts Parameter setting items Abbreviation Description Restore to factory default P1 0 pH P1 1 Select pH buffer solution USA NIST CUS USA P1 4 Select resolution 0 01 0 1 0 01 P1 5 Restore to factory default setting No Yes No P1 6 Set reading stability criteria Normal High Low Normal P1 7 Temperature calibration Calibration range 5 Factory default va...
Страница 24: ...ature Reference temperature P2 6 Temperature compensation coefficient Temperature compensation coefficient P2 8 Factory default setting Factory default setting P2 9 Temperature Calibration Temperature Calibration P6 0 Basic parameters P6 1 P6 8 Automatic Power off Automatic Power off Appendix III Self diagnosis information Icons Self diagnosis information pH Conductivity Wrong pH buffer solution o...
Страница 25: ...NTZ COMBI1 Version1 6 23 85 or 110 pH measuring range out of range 2 00 pH or 16 00pH ...
