Introduction
| ● Meter meets with the requirement of international GLP standards. Its features up to automatic calibration, automatic temperature compensation, data storage, timing measurement, clock display, RS-232 output, function setting and self-diagnose etc. | 
| ● There are three different measurement modes: stable display mode; time measurement mode; continuous measurement mode. | 
| ●Automatically recognize 13 kinds of pH buffer solution. User can choose anyone from four series of standard buffer solutions: Europe & USA series, NIST series, CHINA series and Self-defined series. | 
| ●High purified water and ammonia added purified water pH measuring mode can be set up, especially suitable for electric power and petrochemical industry | 
| ● With EH redox potential measuring mode can directly display ORP value which against standard potential of hydrogen electrode. | 
| ● Automatically recognize 8 kinds of conductivity standard solution. User can choose anyone from two series of solutions: Europe & USA series and China series. | 
| ● Adopt advanced and original conductivity measurement technology, use 1 pc of conductivity electrode (K=1), it can meet measuring accuracy requirement for range within 0.5μS/cm ~ 200mS/cm by using only one-point calibration. | 
| ● Automatically select conductivity measurement range, when measuring high pure water, equipment automatically enter into temperature compensation of nonlinear model, especially for electricity, microelectronics and the pharmaceutical industry requirements. | 
| ● Equips new type of DO electrode which has function of automatic temperature compensation and automatic salinity compensation as well as automatic air pressure compensation inside meter to make DO measuring mode has temperature, air pressure and salinity automatic compensation, easy to use, accurate to measure. | 
| ● Polarogram type DO electrode has special electrode calibration cap. Only needs 3 to 5 minutes for electrode polarization. Electrode adopts combination diaphragm cap which very convenient to use. Each DO electrode equips with three spare diaphragms caps. | 
| ●There are 10 kinds of common ions can be selected in the ion concentration measuring mode, user also can self-define other ions. | 
| ●Can switch 4 kinds of concentration unit : pX, mol/L, mg/L and ppm | 
| ● Meter has the only product serial number. | 
| ●Dustproof and waterproof meter meets IP54 standards. All sockets are seal protected by the silica gel caps. | 
Specifications
| 
             pH 
             | 
            
             Measuring range 
            Resolution 
            Accuracy 
            Input current 
            Input impendance 
            Stability 
            Temp. compensation range 
             | 
            
             (-1.999 ~ 19.999)pH 
            0.1/0.01/0.001 pH 
            Meter:±0.002 pH, connect meter with electrode:±0.01pH 
            ≤1×10-12 A 
            ≥3×1012 Ω 
            ±0.002 pH/3h 
            (0 to 100) ℃(automatic or manual) 
             | 
        
| 
             mV 
             | 
            
             Measuring range(mV/ORP/EH) 
            Resolution 
            Accuracy 
             | 
            
             -1999.9mV ~ 0 ~ 1999.9mV 
            0.1mV 
            ±0.03% FS 
             | 
        
| 
             Ion Concentration 
             | 
            
             Measuring range 
            Display unit 
            Accuracy 
            Temp. compensation range 
             | 
            
             0.00 ~ 14.00 pX 
            pX、mol/L、mg/L、ppm 
            Meter:±0.5 % reading(monovalent), ±1.0 % reading (bivalent) 
            0 to 60 ℃(automatic or manual) 
             | 
        
| 
             Conductivity 
             | 
            
             Measuring range 
            Resolution 
            Accuracy 
            Temp. compensation range 
            Electrode constant 
            Reference temperature 
             | 
            
             Conductivity:(0.00~20.00)μS/cm (20.0~200.0)μS/cm 
            (200~2000)μS/cm  (2.00~20.00)mS/cm 
            (20.0~200.0)mS/cm (200~2000)mS/cm(K=10) 
            Resistivity:(0 ~ 100)MΩ·cm 
            TDS:  (0 ~ 100)g/L 
            Salinity: (0 ~ 100)ppt 
            0.01/0.1/1μS/cm  0.01/0.1/1 mS/cm 
            Meter:±0.5% FS,connect meter with electrode:±0.80% FS 
            (0 ~ 50)℃(automatic ) 
            0.1 / 0.5 / 1 / 5 / 10 / 50 / 100  cm-1 
            25℃、20℃ and 18℃ 
             | 
        
| 
             Dissolved Oxygen 
             | 
            
             Measuring range 
            Resolution 
            Accuracy 
            Response time 
            Residual current 
            Temp. compensation range 
            Salinity compensation range 
            Air pressure compensation 
            Automatic calibration 
            Electrode type 
             | 
            
             (0 ~ 40.00)mg/L(ppm)  (0 ~ 200.0)% 
            0.1/0.01 mg/L(ppm)  1/0.1 % 
            Meter:±0.10 mg/L,connect meter with electrode:±0.40 mg/L 
             ≤30 s(25℃, 90% response) 
            ≤0.1 mg/L 
            (0 ~ 45)℃(automatic) 
            (0 ~ 45)ppt(automatic) 
            (80 ~ 105)kPa(automatic) 
            Air saturated by water; water saturated by air 
            Polarogram type 
             | 
        
| 
             Temperature 
             | 
            
             Measuring range 
            Resolution 
            Accuracy 
             | 
            
             -10℃~ 110℃ 
            0.1℃ 
            5~ 60℃range:±0.4℃  other range:±0.8℃ 
             | 
        
| 
             Other Technical Parameters: 
             | 
            
             Data storage 
            Storage content 
            Power 
            Communication connector 
            Size and weight 
            Quality and safety certification 
             | 
            
             300 groups 
            Measuring value series number, measuring value, temperature, ATC or MTC state, measuring date and time 
            DC9V/300mA 
            RS232 
            160 × 190 × 70mm/880g 
            ISO9001:2008, CE and CMC 
             | 
        
| 
             Working Condition 
             | 
            
             Environment temperature 
            Environmental humidity 
            IP rating 
             | 
            
             5 ~ 35 ℃(0.01grade) 15 ~ 30 ℃(0.001grade) 
            ≤75% 
            IP54 Dustproof and waterproof 
             | 
        
Standard Kit Includes
| 1. Model MP551 pH/mV/ISE/Cond/DO meter | 1set | 
| 2. Model 602 flexible electrode holder | 1pc | 
| 3. Model 901 intelligent stirrer | 1set | 
| 4. 201T-M plastic pH/ATC three-in-one combination electrode | 1pc | 
| 5. 2503-C glass pH combination electrode | 1pc | 
| 6. MP500 temperature electrode | 1pc | 
| 7. 2401-M conductivity electrode | 1pc | 
| 8. DO500 DO electrode | 1pc | 
| 9. Model 6213 double salt bridge reference electrode | 1pc | 
| 10. pH standard buffer solution(pH4.00、pH6.86、pH9.18/50ml) | 1btl/each | 
| 11. 1413μS/cm conductivity standard solution (50 mL) | 2btls | 
| 12. 9V power adapter (meter use) | 1pc | 
| 13. 6V power adapter (stirrer use) | 1pc | 
| 14. DO503 membrane cap (DO electrode use) | 3pc | 
| 15. DO502 DO electrode inner solution (30 mL) | 1btl | 
| 16. Cathode polishing paper | 2pcs | 
| 17. B628 stirring bead | 3pcs | 
| 18. AA battery | 4units | 
| 19. RS-232 communication cable | 1pc | 
| 20. MP551 communication software disk | 1pc | 
| 21. Operation manual | 1unit | 
| 22. Brief operation instruction | 1unit | 
| 23. Packing List | 1pc |