Why do I need to calibrate my pH meter?

Actually you are not calibrating your pH meter. What you are doing is calibrating the pH meter with the particular pH electrode attached to it to a known chemical standard of a certified NIST value called a pH buffer solution.

You calibrate the pH electrode and meter first to buffer 7.01, (or 6.86 depending upon the buffer set you selected when setting up your meter). Buffer 7.01 is the STANDardization buffer to set the pivot point of the X-Y Cartesian Graph used to set the calibration SLOPE of the pH electrode and meter. The SLOPE is the second or third point of the calibration and sets the SLOPE of the line ( \ ). The SLOPE varies with temperature and it is necessary to calibrate the electrode and meter to a NIST known chemical standard to have a known pH reference point.

  • Friday, 25 June 2010
  • Posted in: pH

Comments (0)

Leave a comment

You are commenting as guest.

Cancel Submitting comment...

Featured Products

6010M/6010N

pH, ORP, Temperature Portable Meter.. The Classic series model 6010N and 6010M are low price, IP65 and RoHS compliant pH meter with pH or ORP and temperature readouts and 50 sets of data memory storage (6010M)..

3010M

Conductivity, TDS, Salinity, Temperature Portable Meter. The Classic series 3010M is a low price, 2-wire, IP65 and RoHS compliant conductivity meter with 50 sets of data memory storage.

3020M

Conductivity, TDS, Salinity, Temperature Portable Meter. The Classic series 30120M is a price competitive, IP65 and RoHS compliant conductivity meter with a 4 wire cell covering the full conductivity range from 50mS up with an addition of a 2 wire cell to measure ultra pure water and 50 sets of data memory storage.

9010M/9020M

Dissolved Oxygen, Temperature Portable Meter. The Classic series 9010M is a price competitive, IP65, RoHS compliant and polarographic type dissolved oxygen meter with 50 sets of data memory storage.

6175

Next generation of pH benchtop meter with mV and temperature readouts, high mV resoution, and large LCD.

3175

Next generation conductivity benchtop meter, Jenco EC3175 has an large, backlit LCD display, adjustable cell constant.

6312PTB

pH, Temperature In-line Analyzer. 1/4 DIN, IP65, panel mount pH/Temp analyzer with two sets of 2 wire 4-20mA current output, 2 sets of programmable on/off relay, RS485 output and backlight.

3621/3631

pH, ORP, Temperature In-line Controller. 1/8 DIN, RoHS compliant, panel mount pH/ORP/Temp controller with 2 sets of programmable on/off relay and backlight. Extremely price competitive