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Multiparameter portable pH/Conductivity meter contains 6 measurement modes, the meter is suitable for measuring the pH, ORP, conductivity, TDS, salinity and resistivity.

pH Mode:

• Multiparameter portable pH/conductivity meter is equipped with a backlit LCD display.

• 1 to 5 points push-button calibration with auto-buffer recognition.

• Selectable pH buffer group (USA/NIST/DIN) or using the custom calibration solutions.

• Automatic electrode diagnosis with pH slope and offset display.

ORP Mode:

• 1 point offset calibration allows adjusting the displayed value to a known standard.

• Relative and absolute millivolt modes provide the reliable ORP measurements.

• 1 to 5 points calibration, automatically recognizes the conductivity standard solutions.

• Selectable cell constant (K=0.1/1/10), reference temperature (20/25°C), TDS factor, linear/

  pure water compensations, seawater and practical salinity measurement modes.

Other Features:

• Automatic Temperature Compensation ensures accurate readings over the entire range.

• Calibration Due Alarm prompts user to calibrate the meter regularly.

• Stability indicator shows when a measurement is recognized as stable.

• Auto-Read feature senses and locks the measurement endpoint.

• Battery indicator shows the remaining battery capacity.

• Auto-Power Off effectively conserves battery life.

• Calibration report provides the details for checking the electrode performance.

• Setup menu allows setting the 12 parameters, including the number of calibration points,

  stability criteria, temperature unit, date and time, etc.

• Reset feature automatically resumes all settings back to factory default options.

• Expanded memory stores and recalls up to 500 data sets.

• Stored readings can be transferred into the computer by USB communication interface.

• Multi-mode power scheme (batteries, power adapter and USB port) ensures that use the

  meter smoothly.

 Model 902P

   pH Range   -2.000~20.000pH

   Accuracy    ±0.002pH

   Resolution    0.1, 0.01, 0.001pH, selectable

   Calibration Points   1 to 5 points

   pH Buffer Options USA, NIST, DIN or Custom

   mV Range ±1999.9mV

   Accuracy ±0.2mV

   Resolution 0.1, 1mV, selectable

   Calibration Points  1 point

   Measurement Modes Relative or Absolute mV

   Conductivity

   Range 0.01~20.00, 200.0, 2000µS/cm, 20.00, 200.0mS/cm

   Accuracy ±0.5% F.S

   Resolution 0.001, 0.01, 0.1, 1

   Calibration Points 1 to 5 points

   Calibration Solutions 10µS/cm, 84µS/cm,1413µS/cm,12.88mS/cm,111.8mS/cm

   Temperature Coefficient 0.0~10.0%/°C

   Compensation Modes Linear or Pure water

   Cell Constant K=0.1, 1, 10 or Custom

   Reference Temperature 20°C or 25°C

   TDS Range 0~10.00, 100.0, 1000ppm, 10.00, 100.0ppt (Max. 200ppt)

   Accuracy ±1% F.S

   Resolution 0.01, 0.1, 1

   TDS Factor 0.1~1.0 (Default 0.5)

   Salinity

   Range 0.00~80.00ppt, 0.00~42.00psu

   Accuracy ±1% F.S

   Resolution 0.01

   Measurement Modes Practical salinity (psu) or Natural seawater (ppt)

   Resistivity Range 0.00~20.00MΩ

   Accuracy ±1% F.S

   Resolution 0.01, 0.1, 1

   Temperature Range 0~105°C, 32~221°F

   Accuracy ±0.5°C

   Resolution 0.1°C, 0.1°F

   Calibration Points 1 point

   Calibration Range Measured value ±10°C

   General Temperature Compensation 0~100°C, 32~212°F, Manual or Automatic

   Data Hold Manual or Auto-Endpoint

   Stability Criteria Low or High

   Calibration Due Alarm 1 to 31 days or Off

   Power Off Manual or Automatic (10, 20, 30 minutes)

   Reset Function Yes

   Memory Stores up to 500 data sets

   Output USB communication interface

   Connector BNC, 6-pin mini plug

   Display LCD

   Power 3×1.5V AA batteries or DC5V power adapter

   Battery Life Approximately 150 hours (Turn off the backlit)

   Dimensions 170(L)×85(W)×30(H)mm

   Weight 300g