Apera Instruments TN500 Bedienungsanleitung

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TN500 Portable Turbidity Meter

Instruction Manual

www.aperainst.de

 
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Table of Contents 
1Introduction ...................................................................................................................................- 3 -
2Technical Specifications ..............................................................................................................- 4 -
3Instrumentation Illustration .........................................................................................................- 5 -
3.1 Summary.................................................................................................................................- 5 -
3.2 Configuration .........................................................................................................................- 6 -
3.3 Display Mode..........................................................................................................................- 6 -
3.4 Keypad ....................................................................................................................................- 7 -
3.5 Power supply..........................................................................................................................- 8 -
3.6 Data Save, Recall, and Deletion ...........................................................................................- 9 -
3.7 Setting for the first time use...............................................................................................- 10 -
4Calibration....................................................................................................................................- 10 -
4.1 Preparation for Calibration .................................................................................................- 10 -
4.2 Calibration Procedure (Take 0 NTU and 20 NTU as an example) ...................................- 11 - 
4.3 Notes for Calibration ...........................................................................................................- 12 -
5Turbidity Measurement...............................................................................................................- 14 -
5.1 Sample Vial Handling ..........................................................................................................- 14 -
5.2 Measurement Preparation...................................................................................................- 14 -
5.3 Measurement Mode .............................................................................................................- 14 -
5.4 Notes for Measurement.......................................................................................................- 15 -
6Parameter Setup..........................................................................................................................- 16 -
6.1 Operation ..............................................................................................................................- 16 -
6.2 Parameter Setup Reference Table .....................................................................................- 16 -
6.3 Parameters Description ......................................................................................................- 16 -
7Data Output via USB Port...........................................................................................................- 17 -
8Lamp Replacement .....................................................................................................................- 19 - 
9Warranty.......................................................................................................................................- 20 -
 
 
 
*Fully charge the battery before first-time use. 
 

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1 INTRODUCTION

Thank you for purchasing Apera Instruments TN500 Portable Turbidity Meter (hereafter referred to as the

instrument). The instrument uses tungsten filament lamp as the light source and 90° scattering method,

which is compliant with U.S EPA 180.1 method for the determination of turbidity in drinking, ground,

surface, and saline waters, domestic and industrial wastes. It is suitable for on-site and laboratory use.

The instrument provides accurate results with simple measurement, calibration, and data management,

giving you unparalleled confidence in test results and ease of use.

Intelligent functions such as automatic calibration, operation navigation, parameter setup, real-time

clock display, calibration date check, automatic power off, low voltage indication, and a replaceable

tungsten filament lamp.

Large TFT color screen with blue background for measurement mode, green background for

calibration mode.

Operation guidance and reminders in the process of calibration, measurement and parameter setting.

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.

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).

3.7V rechargeable lithium battery can supply power for over 20 hours of continuous measurement.

The battery life is 5 times longer compared with tungsten lamp turbidimeter in the market using AA

alkaline batteries.

Multi-language operating system, including English, Spanish & Simplified Chinese.

The instrument’s structure meets IP67 water-resistant grade and is suitable for use in harsh

environments.

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

vials, USB charger, and more.

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2 TECHNICAL SPECIFICATIONS

Specification

Description

Measurement

Method

90° scattering measurement, U.S EPA180.1 compliant

Light Source

Tungsten filament lamp

Measuring Range

0 to 1000 NTU (FNU), automatic range switch

0.01 to 19.99 NTU(FNU)

20.0 to 99.9 NTU(FNU)

100 to 1000 NTU(FNU)

Accuracy

≤ ±2% of reading+ stray light

Repeatability

≤ ± 1% of reading or 0.02 NTU(FNU) (the greater of the two)

Resolution

0.01/0.1/1 NTU (FNU)

Stray Light

≤0.02 NTU (FNU)

Calibration

Standard

AMCO Polymer or Formazin Solution：0, 20, 100, 400 and 800 NTU (FNU)

Detector

Silicon photovoltaic

Measuring Mode

Normal measurement and TruReadTM measurement

Data Storage

200 groups

Data Output

USB to PC

Calibration Record

Calibration date and time

Display

TFT color screen

Sample Vial

Φ25×60 mm，high borosilicate glass with lid

Sample Vial

Volume

18 ml

Power supply

3.7V Rechargeable lithium battery

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

Instrument sealing

grade

IP67

Certificates

ISO9001:2015 and CE

Limited Warranty

2 years

Dimension and

Weight

Meter: (90×203×80) mm/385g

Test Kit: (310×295×110) mm/1.5kg

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3 INSTRUMENTATION ILLUS TRATION

3.1 Summary

①

Flip cover of the sample vial holder (Close the

cover when measuring)

⑦

Dust proof plug (Take off the plug when

measuring)

②

Housing

⑧

Sample vial holder

③

Display

⑨

Calibration vials or sample vials

④

Keypad

⑩

Positioning mark (Align the mark with the mark

on the calibration vial or sample vial)

⑤

USB Port

⑪

Built-in lithium battery (Rechargeable)

⑥

Lamp cover

Diagram-1

⑦

⑧

⑨

⑩

⑪

④

①

②

③

⑥

⑤

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3.2 Configuration

3.3 Display Mode

①

Calibration Solutions：

0.0, 20, 100, 400, 800 NTU

②

Carrying case

③

TN500 Turbidimeter

④

Microfiber cloth

⑤

Power adaptor (5V 1A)

⑥

Software flash drive

⑦

Silicone oil (10 ml)

⑧

Sample vials×6

⑨

USB Cable (under the meter)

⑩

User Manual

Diagram-2

①Measurement Mode

②Measurements and unit

③Operation Guide

④Battery icon

⑤Date and time

Measuring

Mode

①Calibration solution

②Measurements and unit

③Progress bar

④Operation guide

Calibration

Mode

①

②

③

④

⑤

⑥

⑦

⑧

⑨

⑩

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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

Calibration

Parameter

Setup

Data Recall

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3.5 Power supply

The instrument adopts 3.7V rechargeable lithium battery.

a) Charging mode

·Charge via Power adaptor: connect instrument and power adaptor with a USB cable. Adaptor

specification: AC110 to 240V, 50/60Hz, output: 5V/1A.

·Charge via Computer: connect instrument and a computer with a USB cable.

Under normal circumstances, it is recommended to use the power adapter to charge the lithium

battery to ensure its performance.When the lithium battery voltage is lower than 3V, the instrument

will shut down, and it’s time to recharge it.

b) Battery capacity indication

·Battery capacity icon: , please recharge the battery when

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

recharged, otherwise the instrument can't work properly.

·If charging the instrument when it is turned on, icon will be displayed. Users can continue

to use the instrument while it is being charged.

·If charging the instrument when it is turned off, "Charging......" will be displayed, and "Charging is

completed" will be displayed after a full charge.

Keypad

Functions

Power on/off

In measurement mode, press to enter or 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

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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, which is

not equal to the number of actual stored data. In normal measurement mode, one serial number

corresponds to one measurement data. In TruReadTM 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 with 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 that the storage is full and you need to delete it before saving new data.

b) Data Recall

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

interface. As shown in Diagram 6, means there are 15 saved measurement 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.

Diagram 4

Diagram 5

Diagram 6

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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 of the saved data, non-

reversible).

3.7 Setting for first-time use.

The instrument should be fully charged before first-time use. Check and adjust settings for the following

items: date, time, system language, etc. See the detail in Section 6 Parameter setup.

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

remaining4 calibration points useAMCO polymer solutions. Note thatthe cap ofthe 0.0 NTU solution

vial can be unscrewed. After the solution is invalidated, users can replace the 0.0 NTU calibration

solution or laboratory distilled water. The 0.0 NTU calibration solution can be purchased from the

supplier; For the remaining 4 calibration solutions, their vial caps cannot be opened. Simply dispose

the solutions after they are expired and buy new ones from your supplier to replace.

b) Replace zero turbidity solution

Replace 0.0 NTU calibration solution: open the vial cap, pour out the original solution, add

1/2 distilled water,cover the cap and shake the vial to rinse it and pour out the water. Repeat

it 3 times. Shake off the distilled water in the vial. Pour in new 0.0 NTU calibration solution

and close the vial cap.

Replace laboratory distilled water: open the vial cap, pour out the original solution, add 1/2

distilled water, cover the cap and shake the vial to rinse it and pour out the water. Repeat it

3 times. Shake off the distilled water in the vial. Pour in new laboratory distilled water and

close the vial cap.

The accuracy of 0.0 NTU calibration solution and laboratory distilled water is same. But 0.0

NTU calibration solution has 6 to 12 months of shelf-life, distilled water can only be used for

several days.

c) Clean vial surface

Apply a small drop of silicone oil on the surface of the vial and wipe it off with a micro-fiber cloth to

evenly distribute the silicone oil on the surface so as to cover smudges or scratches, which helps

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

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

with filter paper or high-quality tissue paper to clean off. Excessive residual silicon oil on the vial

surface will affect the measurement accuracy.

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