HD25.2 Turbidity, Merk : DeltaOhm
Keterangan
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 â User Mangementâ 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 4½ 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 ( Ã 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.
Sâ 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.
