NIT No. 34 Item No.1

Specification for multi-meter for measurement of pH, conductivity/ TDS It will be benchtop type multimeter that will be able to measure the pH, TDS/Conductivity. There will be a large monochromatic backlit graphic LCD display. The LCD will display shows one or both pH and conductivity/TDS channels with temperature. The instrument will also give additional information that includes electrode status, time, date, sample ID and user ID. The instrument will be 5 Point pH Calibration with automatic recognition of buffers (for US/NIST and DIN) and an automatic or manual conductivity calibration and auto ranging measurement. There will be Calibration edit facility to fix calibration errors without full recalibration. The instrument will have non-volatile memory holds up to 2000 data points with time and date stamp. It will have USB and RS232 ports interface to Transfer data and supplied with data analysis software.The instrument will have dual power mode and can be operated on electricity and battery both. Technical Specifications: pH Range : -2.00 to 20.000 Resolution : 0.1, 0.01, 0.001 pH Calibration Points : Up to 5 Calibration Editing : Yes mV Range-mV : ± 2000.0 mV Resolution : 0.1 Relative Accuracy : ±0.2 mV or ±0.05% of reading whichever is greater EH ORP Mode : Yes Temperature Range : -5 to 105°C, 23 to 221°F Conductivity Ranges, : 0.001 µS/cm to 3000mS Resolution, : 0.001µS minimum; 4 significant figures minimum Compatible Cell Constants : 0.001 to 199.9 Calibration editing : UP to 5 Points TDS Range : 1 to 200 ppt Resolution : 4 significant digits Relative Accuracy : 0.5% reading ± 1 digit Temperature Range : -5 to 105°C, 23 to 221°F Resolution : 0.1 Relative Accuracy : ±0.1 Datalogging : 2000 Data Points with time & date stamp Output : RS232, USB Power AC Adapter : Included-universal, 100-240 VAC Battery Power : Optional- 4 AAs Electrode: The pH- Conductivity/TDS multiparameter will be supplied with refillable epoxy body pH/ATC electrode, Buffers: NIST pH buffers of 4,7 and 10, Conductivity Probe, conductivity standard of 1413microS , electrode standard and adapter. Make:- Thermo fischer Scientific-Orien, WTW, Metrohm, Lovibond

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