Apera Instruments TN480 Bedienungsanleitung

TN480 Portable Turbidity Meter

Instruction Manual

APERA INSTRUMENTS, LLC

aperainst.com

 
 
Table of Content 
1Overview.................................................................................................. - 1 - 
2Technical specifications............................................................................... - 2 - 
3Instrument description ................................................................................ - 3 - 
3.1 Instrument Overview .............................................................................................................- 3 -
3.2 Configuration .........................................................................................................................- 4 -
3.3 Display Mode..........................................................................................................................- 4 -
3.4 Keypad....................................................................................................................................- 5 -
3.5 Power Supply .........................................................................................................................- 6 -
3.6 Data Log, Recall, and Deletion.............................................................................................- 6 -
3.7 Setting for first-time use.......................................................................................................- 7 -
4Calibration................................................................................................ - 8 - 
4.1 Preparation for Calibration...................................................................................................- 8 -
4.2 Calibration Procedure (Take 0 NTU and 20 NTU as an example).....................................- 9 -
4.3 Notes for Calibration ...........................................................................................................- 10 -
5Turbidity Measurement .............................................................................. - 11 - 
5.1 Sample Cuvette Handling ................................................................................................... - 11 - 
5.2 Measurement Preparation ..................................................................................................- 11 - 
5.3 Measurement Mode .............................................................................................................- 12 -
5.4 Notes for Measurement.......................................................................................................- 13 -
6parameter setup....................................................................................... - 13 - 
6.1 Operation..............................................................................................................................- 13 -
6.2 Parameter Setup Reference Table .....................................................................................- 14 -
6.3 Parameters Description ......................................................................................................- 14 -
7Data Output Via USB Port........................................................................... - 15 - 
7.1 Display Interface..................................................................................................................- 15 -
7.2 Operation Key in Software Interface .................................................................................- 15 -
7.3 Install Software ....................................................................................................................- 16 -
7.4 Run Software........................................................................................................................- 16 -
7.5 Data Processing...................................................................................................................- 16 -
8Replacement Parts ................................................................................... - 17 - 
9Warranty ................................................................................................ - 16 - 
 
 
 
 
V1.2

- 1 -

1 OVERVIEW

Thank you for purchasing Apera Instruments TN480 Portable Turbidity Meter (hereafter referred to as

the instrument).

The instrument uses infrared light emitting diode (LED 860±30nm) as the light source and 90°

scattering method, which is compliant with ISO7027 and DIN EN 27027 standards for the determination

of the turbidity for water solutions. TN480 allows you to measure turbidity in a reliable and simple

manner wherever you are.

Main features and functions

⚫Large TFT color screen, with on-screen instructions for easy operation.

⚫TruReadTM measurement mode automatically takes multiple consecutive readings, and calculate

their average, minimum and maximum value, as well as displaying each set of data in a brief test

report. TruReadTM is a much better way to determine the true turbidity of your samples, rather than

relying on just one reading. It's especially suitable for sample solutions with rapid settling and

continuous measurement changes.

⚫U.S. EPA certified, non-toxic, easy-to-use polymer standard calibration solutions

⚫Zero turbidity error reminder: the instrument has zero-point calibration and zero-point error reminder

to ensure measurement accuracy for low turbidity solutions.

⚫200 sets of data storage with USB data output to PC (Windows-based), unlimited data storage when

connecting with PC.

⚫Multi-language operating system, including English, Spanish, and Chinese.

⚫Rugged design, suitable for use in harsh environments and field.

⚫Everything comes in a rugged carrying case, including accessories such as calibration solutions,

sample cuvettes, software flashdrive, and more.

- 2 -

2 TECHNICAL SPECIFICATIONS

Measuring Method

ISO 7027 and DIN EN 27027 compliant nephelometric method (90°)

Light Source

Infrared light emitting diode (860±30nm)

Measuring Range

0 – 1000 NTU, automatic range selection:

0.01 – 19.99 NTU

20.0 – 99.9 NTU

100 – 1000 NTU

Accuracy

≤ ±2 % of reading + stray light

Repeatability

≤ ±1% of reading or 0.02 NTU (FTU), whichever is greater

Resolution

0.01 / 0.1 / 1 NTU (FNU)

Stray Light

≤0.02 NTU(FNU)

Calibration Standards

AMCO Polymer Solution or Formazin Solution: 0, 20, 100, 400 and

800 NTU (FNU)

Detector

Silicone photovoltaic

Measurement Mode

Normal measurement and TruReadTM measurement

Data Storage

200 sets

Data Output

USB to PC

Calibration Record

Calibration points, date, and time

Display

TFT color screen

Sample Cuvette

Φ25×60 mm, high borosilicate glass with lid

Sample Cuvette Volume

18 ml

Power Supply

4× AA Alkaline Batteries

Working Condition

Temperature: 0 to 50°C（32°F to 122°F）； Relative humidity：

0 to 90% at 30°C, 0 to 80% at 40°C, 0 to 70% at 50°C, no

condensation

Storage Condition

Instrument: -40 to 60°C (-40 to 140°F)

Calibration Solution: 5 to 30°C (41 to 86°F)

Instrument sealing grade

IP67

Certification

CE and RoHS

Limited Warranty

2 years

Dimension and Weight

Meter: (90×203×80) mm/385g

Test Kit: (310×295×110) mm/1.5kg

- 3 -

3 INSTRUMENT DESCRIPTION

3.1 Instrument Overview

①

Flip cover of the sample cuvette holder

(Close the cover when measuring)

⑥

Battery cover

②

Housing

⑦

Dust-proof plug (Take off the plug when

measuring)

③

Display

⑧

Sample cuvette holder

④

Keypad

⑨

Calibration cuvettes or sample cuvettes

⑤

USB Port

⑩

Positioning mark (Align the mark with the

mark on the calibration cuvette or sample

cuvette)

Diagram-1

⑩

⑦

⑧

⑨

①

②

③

④

⑤

⑥

- 4 -

3.2 Configuration

3.3 Display Mode

Measuring

Mode

Calibration

Mode

①

Calibration Solutions：

0.0, 20.0, 100, 400, 800 NTU

②

Carrying case

③

TN480 Turbidimeter

④

Microfiber cloth

⑤

Screwdriver (to remove battery

cover)

⑥

Software flash drive

⑦

AA Alkaline battery×4

⑧

Silicone oil (10 ml)

⑨

Sample cuevette×6

⑩

USB Cable (under the meter)

⑪

User Manual

①Calibration solution

②Measurements and

unit

③Progress bar

④Operation guide

①Measurement mode

②Measurements and unit

③Operation guide

④Battery icon

⑤Date and time

Diagram-2

①

②

③

④

⑤

⑨

⑧

⑥

⑦

⑩

⑪

- 5 -

Calibration

Parameter

Setup

Data Recall

3.4 Keypad

Diagram 3

①Calibration mode

②Standard values

③Operation guide

④Finished calibration

indicator

①Parameter Setup

②Menu

③Operation guide

①Data Recall

②Saved data numberings

③Saved data

④Operation guide

①

③

②

④

- 6 -

3.5 Power Supply

1. The instrument adopts 4 pieces of AA alkaline battery. Make sure not to mix new & old batteries or

different models of batteries.

2. Battery capacity indication

Battery capacity icon: Please replace new batteries when

icon displays to ensure measuring accuracy; when icon displays, the battery must be

replaced, otherwise the instrument can't work properly. To extend battery life, user can setup auto-

power off time in Parameter Setup P6 according to usage requirements.

3. Use the screwdriver to remove the screws on the battery cover. Insert 4 pieces of AA alkaline

battery. Please make sure the polarity is correct. Put on the battery cover and screw tightly.

3.6 Data Log, Recall, and Deletion

a) Manual data logging and Automatic data logging

In parameter setup P4, users can select manual or automatic data logging mode. In the manual mode,

after measurement is finished, press to save the data (also the measurement interface); In

automatic mode, the data (also the measurement interface) will be automatically saved after each

measurement. The instrument has two types of measurement mode: normal measurement (as in

Diagram 4) and TruReadTM measurement (Diagram 5). in Diagram 4 means that 12 sets of data

has been saved. The storage number only indicates the number of measurement interfaces. In normal

measurement mode, one serial number corresponds to one measurement data. In TruReadTM

Keypad

Functions

⚫Power on/off

⚫In measurement mode, press to enter or exit calibration mode

⚫In calibration mode, press to exit calibration mode

⚫In parameter setup and data recall mode, press to return to measurement mode

⚫In measurement mode, short press to perform single measurement; long press

(>3s) to perform continuous measurement.

⚫In calibration mode, press to confirm calibration.

⚫In parameter setup mode, press to confirm change.

⚫In calibration mode, press to select which standard to calibrate.

⚫In parameter setup mode, press to scroll on the menu options.

⚫In recall mode, press to view store number

⚫Press to enter parameter setup mode

⚫Short press to save measured data; long press (>3s) to enter data recall mode

- 7 -

measurement mode, one serial number corresponds to multiple measurements (according to user’s

setting) in the measurement interface. The data, as shown in Diagram 5, has 10 measurements.

Obviously, for one measurement interface, the memory storage of the normal measurement is different

to that of TruReadTM measurement. The below table shows the amount of storage for each

measurement mode.

Measurement Mode

Storage Capacity

Normal

200 sets

TruReadTM（5 times measurement）

100 sets

TruReadTM（10 times measurement）

61 sets

TruReadTM（15 times measurement）

44 sets

TruReadTM（20 times measurement）

34 sets

Therefore, when the instrument is stored in a mixture of measurement mode, the storage capacity of

measurement interface is different, and it's between 34 to 200. If the stored value is full, will

flash to remind you and you need to clear the storage before saving new data.

b) Data Recall

In measurement mode, long press (>3s), the instrument will display the saved data interface. As

shown in Diagram 6, means there are 15 saved data interfaces and it’s currently showing the

9th one. Press or to check other data. Hold or to quickly check other data.

Press to return to measurement mode.

c) Data Deletion

Once the data storage is full, users need to delete the data in order to save new data. Select Yes in P5

in parameter setup and press to confirm the deletion (will delete all the saved data, irreversible).

3.7 Setup for first-time use

Check and adjust settings for the following items: date, time, system language, etc. See the detail in

Section 6 Parameter settings.

Diagram 4

Diagram 5

Diagram 6

- 8 -

4 CALIBRATION

4.1 Preparation for Calibration

a) Calibration point

The instrument has 5 calibration points: 0 NTU, 20 NTU, 100 NTU, 400 NTU, and 800 NTU.

Among them, 0 NTU point uses AMCO 0.0 NTU calibration solution or laboratory distilled water,

and the remaining 4 calibration points use AMCO polymer solutions. Note that the cap of the 0.0

NTU solution cuvette can be unscrewed. After the solution is invalidated, users can replace the

0.0 NTU calibration solution or use fresh laboratory distilled water. The AMCO 0.0 NTU

calibration solution refill can be purchased from the supplier; For the remaining 4 calibration

solutions, their cuvette caps cannot be opened. Simply dispose the solutions after they are

expired and buy new ones from your supplier to replace. See the detail in Section 8 Replacement

Parts.

b) Replace 0.0 NTU turbidity standard solution

•Open the 0.0 NTU cuvette cap, pour out the original solution, add 1/2 distilled water, screw

on the cap and shake the cuvette to rinse it off and pour out the water. Repeat it 3 times.

Shake off the distilled water in the cuvette. Pour in new AMCO 0.0 NTU calibration solution

or fresh laboratory distilled water. Then close the cuvette cap.

•AMCO 0.0 NTU calibration solution has 6 to 12 months of shelf-life, distilled water is only

valid for a couple of days.

AMCO 0.0 NTU solution is provided in the default kit. For purchase details, please refer to Section 8

Replacement Parts.

c) Clean cuvette surface

Apply a small drop of silicone oil on the surface of the cuvette and wipe it off with a lint-free cloth to

evenly distribute the silicone oil on the surface in order to cover smudges and scratches,which helps

light scattering. But please pay attention to the following points:

①The silicone oil applied should not be too much. After wiping with lint-free cloth, please wipe with

filter paper or high-quality tissue paper to clean off. Excessive residual silicone oil on the cuvette

surface will affect the measurement accuracy.

②It's not necessary to use silicone oil for each calibration and measurement. Apply silicone oil

every several days or once a week. In between, just clean the surface with filter paper or high-

quality tissue paper.

③Clean the calibration cuvette and sample cuvette together and keep the steps and actions

consistent to achieve same degree of cleanliness.

④Stability of calibration solutions

The U.S EPA approved AMCO polymer standard calibration solution is very uniform and stable.

It does not precipitate, drift or condense. Generally, it can be used directly without shaking or

flipping the cuvette (to make the solution even). For AMCO polymer calibration solutions that

have not been used for a long time, slowly flip the cuvette twice and let it stand for 2 minutes.

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