HD25.2 Turbidity, Merk : DeltaOhm

Turbidity Meter Alat untuk mengukur kekeruhan dalam air Introduction The HD25.2 is a digital turbidity meter for laboratory and mobile use, suitable for measure- ments in drinking water, beverages, waste water and process liquids. The working principle is based on the nephelometric ( 90 scattered light sensor) and ratiometric method. It is equipped with three light detectors and two LED light sources ( white and infrared) which are permanently kept under control in order to guarantee long-term stability. The instrument performs measurements according to the standards EPA 180.1, ISO-NEPH ( ISO 7027) , EBC and ASBC. It is also able to carry out measures of transmission factor percentage of white and infrared light. The initial factory calibration is based on Forazin primary standard. Calibration before use is not required. For routine calibration a set of stabilized secondary standard solutions is available: STCAL ( Turbidity standards for calibration) : ? STCAL 1 equal to 0 NTU ? STCAL 2 equal to 1 NTU ? STCAL 3 equal to 10 NTU ? STCAL 4 equal to 100 NTU ? STCAL 5 equal to 1000 NTU User Calibration is automatic on one, four or fi ve points, depending on the measuring variable. Stabilized power supply and advanced electronics garantee optimal performances over time. The HD25.2 is a datalogger that stores up to 999 samples. The data can be transferred from the instrument connected to a PC via the multi-standard RS232C serial port and USB 2.0. The RS232C serial port can be used to transfer the acquired measurements to a 24 col- umn printer. The Print function allows to print labels with progressive numeration and automatic incre- mentation, with all data related to the sample being examined. The dedicated software DeltaLog11 allows instrument management and data processing on PC. The use of the HD25.2 by more customers is facilitated by the ? User Mangement? function, which allows, according to the case, to enable or disable some advanced functions of the instrument through password. Technical characteristics Instrument Dimensions ( Length x Width x Height) 220x120x55mm Weight 400g ( batteries included) Materials ABS Display LCD 4 characters plus symbols Visible area: 52x42mm Operating conditions Instrument working temperature 0 ? 50 C Storing temperature instrument -25 ? 65 C Working relative humidity 0 ? 90% R.H. without condensation Storing of Calibration standards 5? 25 C ( temperature should not ex- ceed, protect from light) Protection degree IP66 Power supply Batteries 3 1, 5 V AA type batteries Autonomy 100 hours with 1800mAh alkaline Rete ( cod. SWD10) Mains adapter 100-240Vac/ 12Vdc-1A Measuring methods Standard EPA180.1, ISO-NEPH ( ISO 7027) , EBC, ASBC, WHITE % T e IR % T Light source LED IR ( 850nm) and white LED ( 470nm) Receiver Silicium photodiode Sample cell  24mm - height 68mm, 20cc Measurement of turbidity Method / Measuring range EPA180.1 ( 0? 2100 NTU) ISO-NEPH ( 0? 150 FNU) EBC ( 0? 37.5 EBC) ASBC ( 0? 9999 ASBC) WHITE % T ( 0? 100 % T) IR % T ( 0? 100 % T) Resolution 0.01 NTU ( 0? 9.99 NTU) 0.1 NTU ( 10.0? 99.9 NTU) 1 NTU ( 100? 2000 NTU) Accuracy 2% reading + 0.01 NTU ( 0? 500 NTU) 3% reading ( 500? 1000 NTU) 5% reading ( 1000? 2000 NTU) Repeatability 2% reading or 0.01 NTU ( the major one) Security of memorized data Unlimited Time Date and hour real time schedule Accuracy 1min/ month max error Measured values storing Quantity 999 samples Serial interface RS232C Type RS232C electrically isolated Baud rate Can be set from 1200 to 38400 baud Data bit 8 Parity None Stop bit 1 Flow Control Xon/ Xoff Serial cable length Max 15m USB interface Type 1.1 - 2.0 electrically isolated Connections Seriale interface DB9 connector ( 9- pole male) USB interface USB connector type B Mains adapter 2- pole connector ( 5.5mm-2.1mm) . Positive at centre. EMC standard regulations Security EN61000-4-2, EN61010-1 level 3 Electrostatic discharge EN61000-4-2 level 3 Electric fast transients EN61000-4-4 level 3, EN61000-4-5 level 3 Voltage variations EN61000-4-11 Electromagnetic interference susceptibility IEC1000-4-3 Electromagnetic interference emission EN55020 class B Ordering codes HD25.2K: The kit is composed of: instrument HD25.2, 4 empty cells, 5 calibration standards STCAL, 3 1.5Vdc alkaline batteries, lubricant rag, 25cc Silicon oil, instructions manual, carrying case and software DeltaLog11 for PCs running Windows 98 to Xp. Accessories 9CPRS232: Connection cable SubD female 9- pole for serial output RS232C CP22: Connection cable USB 2.0 connector type A - type B SWD10: Stabilized power supply at 230Vac/ 9Vdc-300mA mains voltage. S? print-BT: Portable, serial input, 24 column thermal printer, 58mm paper width. PL: Lubricant rag OS1: Silicon oil - 25cc. KCV: 4 empty sample cells  24x68mm Turbidity calibration standards STCAL 1: Calibration standard with low turbidity formazin reference( 0 NTU) - 20cc. STCAL 2: Calibration standard with reference formazin 1 NTU - 20cc. STCAL 3: Calibration standard with reference formazin 10 NTU - 20cc. STCAL 4: Calibration standard with reference formazin 100 NTU - 20cc. STCAL 5: Calibration standard with reference formazin 1000 NTU - 20cc. KS: Kit 5 calibration standard with reference formazinSTCAL 1, STCAL 2, STCAL 3, STCAL 4, STCAL 5.