Nitzan NTZ-COMBI1 Manuel utilisateur

NTZ-COMBI1 Version1.6

pH/Conductivity Portable Meter

Manual

NTZ-COMBI1 Portable pH/Cond. Meter

NTZ-COMBI1 Version1.6

Table of Content

1. Introduction................................................................................................................................................ 1

1.1 Measurement parameters ................................................................................................................... 1

1.2 Basic features ...................................................................................................................................... 1

1.3 pH measurement features ................................................................................................................... 1

1.4 Conductivity measurement features .................................................................................................... 1

2. Specifications ............................................................................................................................................ 2

2.1. Main specifications ............................................................................................................................. 2

2.2. Other specifications ............................................................................................................................ 2

3. Instrument description ............................................................................................................................... 3

3.1. LC display ........................................................................................................................................ 3

3.3. Meter socket ....................................................................................................................................... 5

3.4. Reading stability display mode ........................................................................................................... 5

3.5. Automatic power-off ............................................................................................................................ 5

4. pH measurement ....................................................................................................................................... 5

4.1. pH electrode information .................................................................................................................... 5

4.2. pH calibration consideration ............................................................................................................... 6

4.3. pH meter calibration ........................................................................................................................... 8

4.4. Customer-defined calibration ............................................................................................................. 9

4.5. Sample test ......................................................................................................................................... 9

4.6. pH electrode maintenance ................................................................................................................11

5. mV value measurement: ......................................................................................................................... 12

5.1. Notes ................................................................................................................................................ 12

6. Conductivity Measurement: .................................................................................................................. 12

6.1. Conductivity electrode information ................................................................................................... 12

6.2. Conductivity calibration .................................................................................................................... 13

6.3. Conductivity calibration .................................................................................................................... 14

6.4. Customer-defined calibration ........................................................................................................... 15

6.5. Sample test ....................................................................................................................................... 15

6.6. Conductivity electrode maintenance ................................................................................................ 16

7. Parameter setting .................................................................................................................................... 16

7.1. Main menu ........................................................................................................................................ 16

7.2.Submenu ........................................................................................................................................... 17

7.3. Submenu of pH parameter setting ................................................................................................... 18

7.4. Submenu of conductivity parameter setting ..................................................................................... 19

7.5. Submenu of standard parameter setting .......................................................................................... 20

8. Meter Kits ................................................................................................................................................ 20

9. Warranty .................................................................................................................................................. 21

Appendix I: Parameter setting & Factory default setting ............................................................................ 21

Appendix II: Abbreviation Glossary ............................................................................................................. 22

Appendix III: Self-diagnosis information ..................................................................................................... 22

NTZ-COMBI1 Version1.6

1. Introduction

Thanks for purchasing NTZ-COMBI1 portable pH/Conductivity meter.

This meter is the perfect combination of the most advanced electronics, sensor technology and

software design, and is the most cost effective portable electrochemical meter suited for industrial and

mining enterprises, power plant, water treatment engineering, environmental protection industry, etc,

especially suited for application in field.

In order to use and maintain the instrument properly, please read the manual thoroughly before use.

To improve instrument performance constantly, we reserve the right to change the manual and

accessories without giving notice in advance.

1.1 Measurement parameters

Measurement

parameters NTZ-COMBI1

pH/mV √

Conductivity √

Temperature √

1.2 Basic features

● The microprocessor-based portable meter features automatic calibration, automatic temperature

compensation, function set-up, self-diagnostics, automatic power-off and low voltage display.

● The meter’s digital filter improves measurement speed and accuracy. There is reading stability

display.

● The package includes portable case, meter, probes, standard solutions and all accessories,

convenient to use in field.

● The meter is dust-proof and water-proof, meeting the IP54 rating.

● Temperature calibration function.

1.3 pH measurement features

● 1-3 point automatic calibration, the meter provides calibration guide and automatic checking

function.

● The meter is able to recognize up to 8 types of pH standard buffer solutions. There are four

options of standard buffer solution: USA series, NIST series and customer-defined solution

set-up.

● The meter provides reading stability criteria.

1.4 Conductivity measurement features

● 1-4 point automatic calibration, the meter provides calibration guide and automatic checking

function.

NTZ-COMBI1 Version1.6

● The meter is able to recognize up to 4 types of conductivity standard solutions. There is

customer-defined solution set-up.

2. Specification

2.1. Main specifications

Specifications

Range （0.00 ~ 14.00）pH

Resolution 0.1/0.01 pH

Accuracy ±0.01 pH ±1digit

Temperature

compensation （0 ~ 100）°C（manual or automatic）

Multi-point

calibration 1-3 point

Buffer value

USA: 1,68 - 4,00 - 7,00 - 10,01pH

NIST: 1,68 - 4,01 - 6,86 - 9,18pH

2 value CUSTOMER

Range ±1,000mV

Resolution 1mV

Accuracy ±0.1% FS ±1digit

Conductivity

Range

Conductivity: 0~200 mS/cm(divided into four ranges):

（0~199.9）µS/cm ; (200~1999) µS/cm ;

（2.00~19.99）mS/cm; （20.0~199.9）mS/cm

Resolution 0.1/1µS/cm 0.01/0.1 mS/cm

Accuracy ±1.0% FS ±1digit

Temperature

compensation （0 ~ 80）℃（manual or automatic）

Electrode constant 0.1 / 1 / 10 cm-1

Multi-point

calibration 1-4 point

Standard solution 84 µS/cm, 1413 µS/cm, 12.88, 111,9 mS/cm

1 customer value

Temperature

Range 0~100°C

Resolution 0.1℃

Accuracy ±0.5℃±1digit

Reading tability criteria Low:1.2mV/10 sec., Medium:0.6mV/10 sec.,

High:0.3mV/10 seconds

2.2. Other specifications:

Power AAA batteries × 3 (1.5V× 3)

NTZ-COMBI1 Version1.6

IP rating IP54

Dimen ion &

Weight Meter: (86×196×33 )mm / 335g

3. In trument de cription

3.1. LC display：

(1) — Parameter mode icons

(2) — Measurement reading

(3) — Prompts of special display mode

(4) — Units of measurement

(5) — Temperature units (°C and °F)

(6) — Units of pH and conductivity calibration value（appears with (7)）

(7) — pH and conductivity calibration value（appears with (6)）, and prompts of special display mode

(8) — Temperature value（appears with (5)）, and prompts of special display mode

(9) — Temperature compensation icons

ATC — automatic temperature compensation, MTC — manual temperature compensation

(10) — Calibration guide icon

(11) — Stability icon of readings

(12) — Low battery icon, when this icon appears, please renew the battery

iagram-1

NTZ-COMBI1 Version1.6

3.2. Keypad func ions

3.2.1. Keypad operations

Momentary press ----- <1.5 seconds , Long press ----- >1.5 seconds.

3.2.2. Turn on the meter

Press to turn on the meter: LC full display → display some parameters → display the last

measurement mode.

3.2.3. Turn off the meter

In the measurement mode, press and hold for 2 seconds to turn off the meter.

Note: In the calibration mode or the parameter set-up mode, pressing is invalid. Please press

CAL/M AS key to return to the measurement mode, then press to turn off the meter.

Chart -1 Keypad operations and descriptions

Keypad

Operations escriptions

Momentary press

● In the power-off mode, press this key to turn on the meter.

Long press

● In the measurement mode, press and hold this key for 2 seconds to

turn off the meter.

Momentary/long

press

●COMBI1 pH/Conductivity meter: press this key to select

measurement mode: pH → mV → CON

● In the mode of manual temperature compensation (MTC), when

press and hold this key, the temperature value flashes, then press

this key to change the temperature value (only one direction), and

press to confirm.

● In the parameter set-up mode, press this key to change the serial

number of the main menu and the submenu (only one direction).

● In the submenu mode, press this key to change parameters and

set-up (only one direction).

iagram-2

NTZ-COMBI1 Version1.6

Momentary press

● In the measurement mode, press this key to enter in the calibration

mode.

● In the calibration mode or the parameter set-up mode, press this

key to return to the measurement mode.

Momentary press

● In the measurement mode, press this key to enter in the parameter

set-up main menu.

● In the calibration mode, press this key to make calibration.

● In the parameter set-up mode, press this key to select programs.

3.3. Meter socket

Electrode socket uses BNC and RCA.

Chart-2 Sockets for Meters

Models Photos escription

NTZ-COMBI1 pH/Conductivity

meter

•BNC socket (right) —

connect pH

electrode or ORP electrode,

•BNC socket(left) — connect

conductivity electrode,

•RCA socket (middle) — connect

temperature probe

3.4. Reading stability display mode

When the measuring value is stable, smiley icon appears on LC ,

see iagram – 3. If the smiley icon does not appear or flash, please do

not

get the reading value or make calibration until the measuring value is stable.

Per parameter P1.6, there are 3 criteria for stability standard:

(Normal), (High) and (Low). The factory default is set

“Normal”.

“High” is set for stability for longer time, “Low” is set for stability for shorter

time. User can select suitable stability criteria according to different testing

requirement.

3.5. Automatic power-off

The meter will be power-off after the meter stops operation for 20 minutes.

4. pH mea urement

4.1. pH electrode information

The meter matches plastic pH electrode. Electrode housing adopts polycarbonate engineering plastics

which is corrosion and impact resistant. Connect the electrode to the BNC socket. When dip the

iagram- 3

NTZ-COMBI1 Version1.6

electrode in the solution, please stir the solution briefly and allow it to stay in the solution until a stable

reading is reached.

4.2. pH calibration consideration

4.2.1. Standard buffer solution

The meter uses two series of standard buffer solution: USA series and NIST series, and also

customer-defined solution. Please see Chart - 3 for the two series of standard buffer solution. For

customer-defined solution, please select it per parameter P1.1 and refer to clause 7.3 for details.

Chart - 3 pH standard buffer solution series

Icons

pH standard buffer solution series

USA series NIST series

Three-point calibration

1,68 pH and 4.00 pH 1,68 pH and 4.01 pH

7.00 pH 6.86 pH

10.01 pH 9.18 pH

4.2.2. Three-point calibration

The instrument can perform 1-3 point calibration. The first point calibration must use 7.00 pH (or 6.86 pH)

standard solution, then select other standard solution to perform the second and the third point calibration.

See chart – 4. uring the calibration process, the instrument displays the electrode slope of acidity range

and alkalinity range respectively.

Chart - 4 Three-point calibration mode

USA standard NIST standard Icons Suited range

One-point calibration 7.00 pH 6.86 pH Accuracy

≤ ±0.1pH

Two-point calibration

7.00 pH and

4.00 pH or 1,68 pH

6.86 pH and

4.01 pH or 1,68 pH

Range<7.00pH

7.00 pH and 10.01 pH

6.86 pH and 9.18 pH

Range>7.00pH

Three-point calibration

7.00 pH, 4.00 pH or

1,68 pH, 10.01 pH

6.86 pH, 4.01 pH or

1,68 pH, 9.18 pH

Large Range

4.2.3. Calibration intervals

Calibration intervals depend on the sample, the electrode performance, and the required accuracy. For

high accuracy measurements (≤ ±0.02pH), the meter should be calibrated immediately before taking a

measurement. For general accuracy (≥±0.1pH), the meter can be calibrated and used for approximately

one week before the next calibration.

The meter must be recalibrated in the following situations:

NTZ-COMBI1 Version1.6

(a) New probe, or probe that is unused for a long period of time

(b) After measuring acids (pH<2) or alkaline solutions (pH>12)

(d) If the solution’s temperature differs greatly from the calibration solution temperature

NTZ-COMBI1 Version1.6

4.3. pH meter calibration ( take an example of three-point calibration)

4.3.1. Press key to enter into the calibration mode, “CAL 1”

blinks at the top right of LC and “7.00 pH ”blinks at the bottom right of

LC , indicating using pH 7.00 buffer solution to make the 1st point calibration.

4.3.2. Rinse pH electrode in pure water, allow it to dry, and submerge it in

pH7.00 buffer solution. Stir the solution briefly and allow it to stay in the

buffer solution until a stable reading is reached. The meter’s display will

show scanning and locking process of calibration buffer solution at the

bottom right of LC . Er 2 displays if press key before the value

is locked. See chart – 5.

4.3.3. When the meter locks 7.00 pH, stable icon displays on LC .

Press key to calibrate the meter. End icon appears after

calibration is done. The 1st point calibration is finished, meanwhile,

the meter’s display will show at the top right a blinking CAL2, and show at the

bottom right blinking 4.00pH and 10.01pH alternately, indicating using

pH4.00 or pH10.01 buffer solution to make the 2nd point calibration.

4.3.4. Take out pH electrode，rinse it in pure water, allow it to dry, and

submerge it in pH4.00 buffer solution. Stir the solution briefly and allow it to

stay in the buffer solution until a stable reading is reached. The meter’s

display will show scanning and locking process of calibration buffer solution

at the bottom right of LC . When the meter locks 4.00 pH, stable icon

displays on LC . Press key to calibrate the meter. End icon and

electrode lope of acidity range display after calibration is done, meanwhile,

the meter’s display will show at the top right a blinking CAL3, and show at the

bottom right blinking 10.01pH, indicating using pH10.01 buffer solution to make

the 3rd point calibration.

4.3.5. Take out pH electrode，rinse it in pure water, allow it to dry, and

submerge it in pH10.01 buffer solution. Stir the solution briefly and allow it to

stay in the buffer solution until a stable reading is reached. The meter’s display

will show scanning and locking process of calibration buffer solution at the

bottom right of LC . When the meter locks 10.01 pH, stable icon displays

on LC .

Press key to calibrate the meter. End icon and electrode lope of

alkalinity range display after calibration is done. The meter goes to the

measurement mode, displays stable measuring value and calibration guide icons.

Please see iagram – 4 for the above calibration process.

4.3.6. uring the calibration process, press key to exit from the calibration mode. The meter can

perform one-point, two-point and three-point calibration. Calibration guide icons appear on LC .

iagram- 4

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