Linshang LS310 Water Quality Tester User Manual

LS310 Water Quality Tester

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Specifications

• Measurement Object: Tap water, purified water, bottled water,
  ground water, surface water (non-sewage) and other drinking
  water

• Measurement Parameters: COD (Chemical Oxygen Demand), TOC
  (Total Organic Carbon), UV275 (Ultraviolet Absorption Value), TDS
  (Total Dissolved Solids), Electrical conductivity, Temperature

• Measurement Range: COD(0-100mg/L), TOC(0-100mg/L),
  UV275(0-1.0au/cm), TDS(0-2000ppm), Electrical
  conductivity(0-4000us/cm), Temperature(0-50)

• Resolution: COD(0.01mg/L), TOC(0.01mg/L), UV275(0.001au/cm),
  TDS(1ppm), Conductivity(1us/cm), Temperature(0.1)

• Accuracy: Display

• Display: 240*135 1.14 inch TFT color screen

• Power Supply: 2 AAA alkaline dry batteries

• Size: 157 37 14mm

• Weight: About 68g

• Working Temperature Range: 0~50°C

• Storage Temperature Range: -10~60°C, 85%RH no condensation

Features

1. The instrument simultaneously measures 6 parameters of water
   quality for comprehensive evaluation.

2. Color screen display with backlight indicating water quality
   levels and providing a score.

3. Ambient temperature compensation function for stable value and
   long-term calibration.

4. Small, portable, pen-like design for ease of use and
   carry.

Operation

1. Power on/off:

• Power on: Short press button to turn on the
  instrument.

• Power off: Long press button to shut down the
  instrument.

• Calibration:

The instrument needs calibration when used for the first time or
after a long period of inactivity.

• Long press button to enter calibration mode in measuring
  mode.

• On the calibration interface, use buttons to select options and
  confirm the selection.

• Insert the probe into pure water and press a button to start
  calibration.

• If calibration fails, possible reasons include not placing the
  instrument in pure water, contaminated probe, or light source
  issues.

FAQ

Q: How often should I calibrate the LS310 Water
Quality Tester?

A: It is recommended to calibrate the tester
when using it for the first time and periodically as needed,
especially after a long period of inactivity or if you suspect
inaccurate readings.

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Shenzhen Linshang Technology Co., Ltd.
LS310 Water Quality Tester
User Manual V1.07
Please read this manual carefully before using and reserve it for reference.
2023/1/4 Page 1 of 10

I. Product Introduction

Shenzhen Linshang Technology Co., Ltd.

Water quality meter designed for use in applications such as tap water, purified water and ground water. The instrument measures the drinking water’s COD, TOC, and UV275 water quality parameters according to the ultraviolet absorption spectrophotometry, and it measures the conductance between electrodes to determine the water’s TDS and Electrical conductivity. The instrument includes an intelligent scoring feature, and through the LCD backlight color, it displays 4 degrees of water quality: fine, good, average, and poor. The instrument contains a temperature correction feature that is accurate and repeatable.
Standard for the product:
GB5749-2020 Standards for Drinking Water Quality
GB/T5750-2023 Standard Examination Methods for Drinking Water
JJG 821-2005 Verification Regulation of Total Organic Carbon Analyzer
JJG 376-2007 Verification Regulation of Electrolytic Conductivity Meters

II. Parameters

Tap water, purified water, bottled water, ground water, surface water Measurement Object
(non-sewage) and other drinking water

Measurement parameters

COD (Chemical Oxygen Demand), TOC (Total Organic Carbon), UV275 (Ultraviolet Absorption Value), TDS (Total Dissolved Solids), Electrical conductivity, Temperature

COD(0-100mg/L), TOC(0-100mg/L), UV275(0-1.0au/cm), TDS(0-2000ppm), Measurement Range
Electrical conductivity(0-4000us/cm), Temperature(0-50)

Resolution

COD(0.01mg/L), TOC(0.01mg/L), UV275(0.001au/cm), TDS(1ppm), Conductivity(1us/cm), Temperature(0.1)

Accuracy

COD: 0-5mg/L:±0.5mg/L; 5-100mg/L:±10%HH is the standard value TOC: 0-5mg/L: ±0.5mg/L; 5-100mg/L: ±10%H, H is the standard value UV275: 0-0.1au/cm: ±0.01au/cm; 0.1-1.0au/cm: ±10%H, H is the standard value TDS: 0-100ppm±5ppm100-2000ppm±5%H, H is the standard Electrical conductivity: 0-200us/cm±10us/cm200-4000us/cm±5%H,H is the standard

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Temperature: ±2

Shenzhen Linshang Technology Co., Ltd.

Display

240*135 1.14 inch TFT color screen

Power Supply

2 AAA alkaline dry batteries

Size

157 37 14mm

Weight

About68g

Working Temperature Range 0~50

Storage Temperature Range

-10~600~85%RHno condensation

III. Features
1. The instrument simultaneously measures 6 parameters of COD, TOC, UV275, TDS, Electrical conductivity and Temperature to make a comprehensive evaluation of the water quality.
2. The instrument uses a color screen display, which uses the color of the backlight to indicate different water quality levels and provides a score.
3. The instrument has the function of ambient temperature compensation, the value is stable, and it allows long-term calibration.
4. Small, portable, pen-like design that is simple to use and carry.
IV. Operation
1. Power on/off

Power on: Short press button, the version and the serial number of the instrument host and probe are displayed on the screen at the same time after powering on, and then the instrument will enter the measurement interface.

Power off: Long press the automatically shut down.
2. Calibration

button to shut down the tester or within 3 minutes no operation

2023/1/4 Page 1 of 10

Shenzhen Linshang Technology Co., Ltd.
The instrument has to be calibrated when it is used for the first time or after a lengthy period of inactivity.
Long press button to enter the calibration interface in measuring mode, On the calibration interface,

short press

button to select the [Yes/No] option, and short press

button to confirm the selection.

At this time, insert the probe of the instrument into the pure water and short press

to start calibration.

After calibration is completed, it will prompt “Calibration successful!”, and exit to the measurement page.

If the calibration fails, the possible reasons are as follows: The instrument has not been placed in pure water. The probe is contaminated, please rinse it with clean water before calibrating. The attenuation of the light source makes it unable to work normally, and needs to be returned to the
factory for inspection and maintenance

3. Measurement

Short press

to measure after inserting the instrument’s probe into the water sample to be tested.

Following the measurement, the water quality will be graded in accordance with the test results, and the display will show various backlight colors depending on the results: poor — red, general — yellow, good -green, excellent — blue. Scoring judgment:

TOC(mg/L)

0-1.25

COD(mg/L)

0-0.75

TDS(ppm)

0-250

Score

90-100

Judgment

Fine

Backlight color Blue

1.25-2.5 0.75-1.5 250-500 80-90 Good Green

2.5-5.0 1.5-3 500-1000 60-80 Average Yellow

5.0-12.5 3-7.5 1000-2000 <60 Poor Red
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Shenzhen Linshang Technology Co., Ltd.

4. Setup and Calibration

Press and hold the

button for 3 seconds in the off state to enter the Main Menu of the instrument

with three sub-options, press the button to confirm the selection.

briefly to select [Language, Calibration, Exit], short press the

Language: Short press

button to enter the language option and press

the right language, then press

button to confirm your selection.

button to select

Calibration: Short press the

button to enter the calibration interface, the function is the same

as long pressing the

in the measurement interface to enter the calibration interface.

Exit: Short press

button briefly to exit the main interface and enter the measurement interface.

V. Attentions
1. Corrosive liquids like beverages, tea, or sewage should not be utilized with the device. 2. To prevent contaminating pure water during calibration, the instrument must be cleaned of water
stains and dirt at the probe.
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Shenzhen Linshang Technology Co., Ltd.
3. The instrument must be calibrated with purified water (bottled purified water is labeled “Purified Drinking Water”), and it is prohibited to calibrate with mineral or natural drinking water.
4. After measuring the liquid out of the instrument, the residual liquid need to be cleaned up at the probe to avoid mixing the two different liquids, which might cause errors in the test results.
5. Use the temperature of 0-50 , such as beyond please calibrate before use, extreme temperatures will cause permanent damage.
6. Do not use alcohol and other organic solutions to clean the contact probe, as it will cause permanent damage.
7. When an instrument is used for the first time or has been inactive for a while, it has to be calibrated.
8. The battery needs to be taken out when the instrument is not used for a long time.

VI. Packing List

No.

Product Name

Quantity

Unit

1

Water Quality Meter

1

set

2

AAA alkaline battery

2

pcs

3

User Manual

1

pcs

4

Certificate / Warranty card

1

pcs

VII. Service
1. The gauge has one-year warranty. If the gauge works abnormally, please send the whole gauge to our company for maintenance.
2. Provide users with spare parts and lifelong maintenance services. 3. Provide the users with the gauge calibration service. Free technical support for the long term.

Manufacturer: Shenzhen Linshang Technology Co., Ltd. Website: www.linshangtech.com Service hotline: +86-755-86263411
Email: sales21@linshangtech.com

2023/1/4 Page 1 of 10

References

• Transmission Meter | UV Light Meter | Coating Thickness Gauge - Linshang

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