chapter Product Overview

1.1Product Information

The DPD colorimetric method is used to detect the concentration of residual chlorine, which is a measuring, cost-effective, and low maintenance instrument suitable for measuring residual chlorine during chlorination disinfection and monitoring residual chlorine concentration in drinking water pipelines. Continuous operation for 30 days of reagent usage, achieving unmanned operation and low operation and maintenance costs.

This product is generally suitable for residual chlorine measurement in chlorine disinfection processes such as tap water, circulating cooling water, and sewage, as well as residual chlorine measurement in tap water pipelines.

measurement range	0~5ppm residual chlorine
accuracy	± 5% reading or ± 0.03ppm Cl₂Take the bigger one
detection limit	0.03mg/L
monitor	70mm × 48mm LCD display
wash	Self cleaning, manual cleaning
correction	Correction method:2 o'clock, 3 o'clock, 4 o'clock, 5 o'clock, 6 o'clock calibration andUse default calibration curve
Operating conditions	Sample flow rate: 200-400mL/min Sample import pressure: 0.1~5 bar Sample temperature: 5-40 ℃
power supply	220-230VAC，50/60Hz
output	4-20mAoutput
digital communication	Equipped with MODBUS RS485 communication function, it can transmit measurement values in real time
relay	2 sets of relays
Storage temperature range	-20～60℃
storage humidity	Humidity: 10-90%, non condensing
instrument size	460mm350mm186mm（highlongwide）
weight	About 9KG
Installation method	wall-mounted

Table 1 Residual Chlorine AnalyzertechnologySpecifications

Chapter 2 instrumentInstallation of

2.1Instrument installation

colorimetryresidual chlorineonlineanalyzeradoptWall mounted installation,The specific installation steps are as follows:firstuseM5*10Bolt the installation bracket onto the analyzer and then use8 × 12 screwsAnalyze the analyzerinstallOn the wallFigure 2To install dimensions and components.

instrumentWhen installing on site, try to place the instrument as close as possible to the sampling point to ensure that the sample update can be completed every working cycle. Leave sufficient space on the side and bottom of the instrument for connecting pipelines and wires.

2.2 Pipeline Connection

The connection between the sample inlet and outlet is located at the bottom of the instrument. The sample inlet device requires a hose with an outer diameter of 6mm, while the sample outlet device requires a hose with an inner diameter of 1/2 (13mm) inch

2.3 Sample adjustment

All samples must be pre adjusted using the processing equipment provided with the analyzer. Ball valve on the raw water inlet pipeline (installation component shown in the figure below)3）Can be used to control the flow rate on the splitter filter.

suggestionUPVC drainage tee(Installation components shown below)11）The installation position of the centerline should be higher than instrument 60cmIf the on-site pipeline water pressure is stable, this height can be appropriately reduced.

Due to the influence of residual chlorine on the flow rate of the water sample，Flow rate too low or too highallMay cause abnormal instrument readings，So it needs to be regulated through a flow control valve(Installation components)16）Adjust the flow rate to ensure a sample flow rate of 200-400mL/min（ifflow velocityBelow 200mL/min， Will lead to low data;ifflow velocityAbove 400 mL/minThis may lead to the possibility of data leakagenow0）.