required list of class a certified equipments for district and sub divisional laboratories of phed in dist.-betul-2 conductivity + tds meter - supply, installation, testing and commissioning .specification -range 0.1 μs to 200 ms ( 6 decadic ranges ) , accuracy ± 1% of f.s ± 1 digit, resolution 0.001 μs, tds range 0.1 ppm to 200 ppt. ( 6 decadic ranges ) , cell constant acceptable form 0.1 to 5.0 , width auto / manual temp. compensation . instrument calibration as per nabl noms. make - systronics / perkinelmer / shimadzu 3 ph meter - range 0 to 14 ph, resolution 0.01 relative accuracy± 0.002 ph ± 1 digit slope85% to 115% calibration 2 / 3 / 5 point calibrationstandards buffers1.679, 7.000, 4.004 or 9.183, 12.454buffer deviation± 0.5 ph mv range0 to ± 1999.9mv resolution0.1mv accuracy0.5 mv ± 1 digit or ± 0.05% of reading temperature compensation auto / manual range 0 to 99.9 degree celsius resolution0.1 degree celsiusaccuracy± 0.5 degree celsius ± 1 digit display2 line, 20 - character alphanumeric lcdiinstrument calibration as per nabl noms. make - systronics / perkinelmer / shimadzu 4 nepheloturbidity meter - supply, installation, testing and commissioning .range 0 to 1000 ntu repeatibility ± 1%of fsd accuracy ± 1.5%±1.5% of fsd in 0-500 & ±2%of fsd in 500-1000 detector photo diode source led display lcd 2 line, 16 character, alphanumeric, calibration formazin standard solutionpower230v, 50hz + / - 10% instrument calibration as per nabl noms.make -systronics / perkinelmer / shimadzu