自動在線SDI儀（以色列）

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型號 型號:MSDI-2201
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廠商性質 生產商
所在地 北京市

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自動在線SDI儀(以色列) 型號:MSDI-2201

自動在線SDI儀（以色列） 型號:MSDI-2201

1個采樣點
1通道模擬輸出
● 在測量之前沖洗管路

● 控制水壓范圍

● 測量流量

● 切換濾膜

● 每個測試過程完成后排水并清洗系統

● 測量方式可編程

● 監控已執行程序

● 大容量數據存儲

● 實時SDI值和狀態顯示

● 可編程的限報警

● 自檢和錯誤狀態報警

● 可選的遠程監控
220/110VAC到24VDC電源轉換
彩色觸摸屏顯示器
10個6米長濾膜卷
1. Introduction
1.1. General Description
Multi Channel On-Line Quality Water
Analyzer, SDI-2200
he SDI 2200 Automatic, On Line, Silt Density Index
Monitoring System is a unique on-line control system, designed
for continuous, unattended operation in desalination and other
water treatment plants.
T
The SDI 2200 is used in critical water quality applications, where precise
control is essential for safe and economic operation. It replaces the manual,
error prone, conventional procedure with an automatic, precise and infallible
routine.
The SDI 2200 is a complete self-contained system meant for unattended
operation with extensive reliability and with advanced fault analysis and
warning.
The rugged, spray proof （IP 53） wall mountable system performs all the
below steps that are required for quality water testing results:
ƒ Flushes pipes prior to measurement. ƒ Controls water pressure.
ƒ Measures flow rate.
ƒ Replaces filter.
ƒ Drains the water and cleans the system at th
ƒ Programmability of the measurement protoc
ƒ Monitors executed program.
ƒ Data logging in digital memory.
ƒ Real time SDI and status display. SDI-2200

ƒ Programmable alarm on over-limit levels.
ƒ Self-test and fault conditions alarm.
ƒ Optional dry contact and analog signals for remote control and
monitoring.

The Display panel provides the operator with interface and on-line control to
the Analyzer control functions.
There are four possible input channels for the SDI-2200 driven analyzers
categorized as follows:
ƒ 1 Channel Analyzer: SDI-2201
ƒ 2 Channel Analyzer: SDI-2202
ƒ 3 Channel Analyzer: SDI-2203
ƒ 4 Channel Analyzer: SDI-2204
1.2. Principals of Operation
Standard Test Mode
Silt Density Index （SDI） is measured by comparing the flow rate of a
known quantity of water, where the water quantity is kept under constant
pressure. The flow rate is measured twice, once where the water flows
through a standard filter, as a reference, when the filter is unused, and
the second time after the filter is exposed for 1-15 minutes, and the
water sample flow is kept always under constant pressure.
The drop in flow rate is a direct measure of the silt build-up on the filter.
The flow rate is derived from quantities and timing information:

1 ?
?
?
?
− i
tSDI = 100
1
×
?
?
?
?
?
?
?
?
−
τ
f
i
t
t

Where:
initial time required to collect 500 [mL] of sample,
time required to collect 500 [mL] of sample after test time t t: total elapsed flow time, min. （usually Standard Measured Time1
）
The SDI 2200 provides the same type of measurement both in automatic
nd in on-line mode for up to four independent sampling points.
The pressure is kept constant by precisely regulated air pressure applied on
he water surface without the need of any mechanical device.
Auto Time Test Mode
n cases where the silt density index （SDI） reading is unstable and
eadings are higher then 5 （i.e. Plugging Factor is higher then 75%）,
during the 15 minutes check time, the Analyzer can be programmed to
work in AUTO TIME TEST MODE based on the following test
method automatically:
ƒ The %P30 （Plugging Factor） calculations will proceed and
recorded in intervals of one-minute elapsed.
ƒ Calculations will stop once %P30 （Plugging Factor） 75% has been
reached.
ƒ New SDI2 readings will be displayed based on the last calculated
plugging factor at the last measured time also check time will be displayed.
All SDI test readings are on 0-100 scale where the exact check
time figure has no valuable meaning as in the Standard Test
Mode. In general, the higher the SDI reading the more silt is in
the water. When the plugging factor after 15 minutes is
calculated to be lower then 75%, the Analyzer will switch and
calculate the test results based on the Standard Method.
%P30 = 100 1 ×
?
?
?
?
?
?
?
?
−
f
i
t
t

Where:
%P30: plugging factor at 30 [psi] feed pressure,
ti
: initial time required to collect 100 [mL] of sample,

1 Standard Measuring Time （SMT） is 15 minutes. The higher the expected SDI value, the lower
the SMT value. The SMT scale value ranges from 1–15.
2 - if after 15 minutes the readings are lower then 75% results are being calculated as per the
Standard method. The higher the SDI readings the more silt are in the water.
Page 9 of 69 Rev. 1.0
SDI-2200 OPERATING MANUAL （COLOR） 1 0.DOC 1.3. System and Product Specifications

TECHNICAL INFORMATION:
Dimensions （in mm） W= 760 D= 500 H=260
Dimensions （in In） W= 30 D= 20 H=10.25
Weight 40[Kg], or 85[Lb]

CONSTRUCTION MATERIAL:
Wet Parts PVC
Construction Container Polyester

UTILITY SPECIFICATIONS:
Supply In:
Water Pressure 2.4 to 6.0 [Bar] or 35 to 90
[Psig]
Water Flow Rate 1.5 [L/min.] or 0.5
[Gal/min.]
Air Pressure 5.2 to 8.0 [Bar] or 80-120
[Psig]
Electrical 24 [VDC], 2 [Amp]
Slit Density Index （SDI） ranges 0.00-99.99
SDI Check time 1-15[Minutes]

Output Signal:
Option 1: Dry contact for common alarm indication
and fault indication
Option 2:
Two dry contact for common alarm
indication and fault indication
Option 3:
Dry contact for Ready indication
Option 4:
Dry contact for each channel alarm
indication
Option 5:
Analog isolated output per channel 0-5 [Volt], 1-5[Volts], 0-
20[mA] and 4-20[mA].
Input Signal:
Option 1:
Remote Start/Stop input Dry Contact
Option 2:
Remote Start for each input Dry Contact
Filter Paper Type Rolls, length 6 [Meter] or 20
[Ft], 90 measurements per
roll.
Drain PVC

Environment protection: IP53

1.4. SDI Analyzer Type and description:

Analyzer format definition - SDI 220n-a-b-c

Where:
n: Number of Channels （1 - 4）.
a: Number of Analog Outputs （1 - 4）.
Specified ranges: ƒ 0-5 [Volts]
ƒ 1-5 [Volts]
ƒ 0-20 [mA]
ƒ 4-20 [mA]
Note: The Analog Output is directly related to the SDI reading （see- setting the
analog range 3.2.7）.
b:
Where:
0 - No Relay Alarm Output.
1-5 - One to five Alarm Outputs. c:
Where:
0 - No Remote Start/Stop Input.
1 - With Remote Start/Stop Input.

Examples:

SDI 2202-2-0-0 range 0-5 [Volt]
for Analyzer with two inputs and two analog （0-5[Volt]） outputs and no alarm relay
outputs nor remote start input, with local panel.
SDI 2204-3-1-1-range 1-5 [Volt]
for Analyzer with four inputs and three analog （1-5 [Volt]） outputs, alarm relay
outputs and remote start input.

SDI 2202-2-0 range 0-20 [mA]
for Analyzer with two inputs and two analog （0-20 [mA]） outputs and no alarm
relay outputs, with local display panel.

1.4.1. Analyzer Configuration
The SDI-2200 consists of sing le non-portable unit. Overall
system representation and detailed views are shown below:
In the Table 1 below, the Analyzer is presented in the center column with a
view of the front door open. Picture of the side view in the right column:
Analyzer

自動在線SDI儀（以色列）MSDI-2201