Apera Instruments PC 850 Bedienungsanleitung

PC850 Version1.0

PC850

Portable pH/Conductivity Meter

Manual

PH 850 Portable pH Meter

EC 850 Portable Cond. Meter

PC 850 Portable pH/Cond. Meter

APERA INSTRUMENTS (Europe) GmbH

www.aperainst.de

PC850 Version1.0

Table of Contents

1. Introduction ---------------------------------------------------------------------------------------------------------------------------

2. Specifications -------------------------------------------------------------------------------------------------------------------------

3. Instrument Description -------------------------------------------------------------------------------------------------------------

3.1. LCD display----------------------------------------------------------------------------------------------------------------------

3.2. Keypad functions ---------------------------------------------------------------------------------------------------------------

3.3. Meter socket ---------------------------------------------------------------------------------------------------------------------

3.4. Reading stability display mode ----------------------------------------------------------------------------------------------

3.5. Automatic lock-up display mode ------------------------------------------------------------------------------------------

3.6. Automatic power off ---------------------------------------------------------------------------------------------------------

3.7. Temperature adjustment ----------------------------------------------------------------------------------------------------

4. pH measurement ---------------------------------------------------------------------------------------------------------------------

4.1. pH electrode information-------------------------------------------------------------------------------------------------------

4.2. pH calibration consideration -------------------------------------------------------------------------------------------------

4.3. pH calibration --------------------------------------------------------------------------------------------------------------------

4.4. Sample test ----------------------------------------------------------------------------------------------------------------------

4.5. pH electrode maintenance----------------------------------------------------------------------------------------------------

5. mV value measurement--------------------------------------------------------------------------------------------------------------

6. Conductivity measurement ----------------------------------------------------------------------------------------------------------

6.1. Conductivity electrode information-------------------------------------------------------------------------------------------

6.2. Conductivity calibration ------------------------------------------------------------------------------------------------------

6.3. Conductivity calibration--------------------------------------------------------------------------------------------------------

6.4. Relationship between TDS and Conductivity ------------------------------------------------------------------------------

6.5. Sample test------------------------------------------------------------------------------------------------------------------------

6.6. Conductivity electrode maintenance-----------------------------------------------------------------------------------------

7. Parameter setting----------------------------------------------------------------------------------------------------------------------

7.1. Main menu-------------------------------------------------------------------------------------------------------------------------

7.2. Submenu --------------------------------------------------------------------------------------------------------------------------

7.3. Submenu of pH parameter setting -------------------------------------------------------------------------------------------

7.4. Submenu of Conductivity parameter setting ------------------------------------------------------------------------------

7.5. Submenu of standard basic parameter setting -----------------------------------------------------------------------

8. Meter Kits-------------------------------------------------------------------------------------------------------------------------------

9. Warranty---------------------------------------------------------------------------------------------------------------------------------

Appendix I: Parameter setting & Factory default setting------------------------------------------------------------------------

Appendix II: Abbreviation Glossary-------------------------------------------------------------------------------------------------

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

PC850 Version 1.0

1. Introduction

Thanks for purchasing PC850 portable pH/Conductivity meter.

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

technology, and software design, and is the most cost-effective portable electrochemical meter

designed for industrial and mining enterprises, power plants, water treatment engineering,

environmental protection industry, etc., especially ideal for general field use.

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

PH850

EC850

PC850

pH/mV

√

Conductivity

√

Temperature

√

1.2. Basic Features

●The microprocessor-based portable meter features automatic

calibration, automatic temperature compensation, function setup,

self-diagnostics, automatic power-off and low voltage display.

PC850 meter is able to measure up to 3 parameters simultaneously

and switch displays effortlessly. Please see Diagram -1:

two electrodes at most can be fit into the clip to measure 3 parameters

simultaneously.

●The meter’s digital filter improves measurement speed and accuracy. There is a stable

reading indication on the display.

●The package includes a portable case, a meter, electrodes, standard solutions and all

accessories, which is convenient to use in field.

●The meter is dust proof and waterproof, meeting the IP57 rating.

1.3. pH Measurement Features (for Model PH850 and PC850)

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

function.

●The meter is able to recognize pH standard buffer solutions automatically. USA series and

NIST series buffer solutions can be selected.

●The meter provides three types of reading stability criteria.

Diagram-1

PC850 Version 1.0

1.4. Conductivity Measurement Features (for Model EC850 and PC850)

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

function.

●The meter is able to switch between conductivity and TDS.

●The meter is able to recognize conductivity standard solutions automatically.

2. Specifications

2.1. Main specifications

Specifications

Models

Range

(0.00~14.00) pH

PH 850

PC 850

Resolution

0.1/0.01 pH

Accuracy

±0.01 pH ±1 digit

Temperature

compensation

(0~100)˚C (manual or automatic)

Range

±1,000 mV

Resolution

1 mV

Accuracy

±0.2% F.S ±1 digit

Conductivity

Range

Conductivity: 0~200 mS/cm

(divided into five ranges):

(0.00~19.99) μS/cm; (20.0~199.9) μS/cm;

(200~1999) μS/cm; (2.00~19.99) mS/cm;

(20.0~199.9) mS/cm

TDS: (0~100) g/l

EC 850

PC 850

Resolution

0.01/0.1/1μS/cm 0.01/0.1 mS/cm

Accuracy

±1.0% F.S ±1digit

Temperature

compensation

(0 ~50)˚C (manual or automatic)

Electrode constant

0.1 / 1 / 10 cm-1

Temperature

Range

0~100˚C

PH 850

EC 850

PC 850

Resolution

0.1˚C

Accuracy

±0.5˚C ±1 digit

2.2. Other specifications:

Power

AAA batteries × 3 (1.5V×3)

IP rating

IP57

Dimension & Weight

Meter: (86×196×33) mm / 335 g

Portable case:(330×270×82)mm/1.3kg

PH850, EC850

Portable case:(370×270×77)mm/1.8kg

PC850

PC850 Version 1.0

3. Instrument Description

3.1. LCD 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

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

(8) —Temperature value, 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 replace the battery

(13) —Automatic reading hold icon

3.2. Keypad functions

Diagram-2

LCD

Diagram-3

Keypad

HOLD

⑬

PC850 Version 1.0

3.2.1. Keypad operations

Short press ----- <1.5 seconds;Long press ----- >1.5 seconds.

Turn on the meter: Press to turn on the meter.

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 setup mode, pressing is invalid. Please

press key to return to the measurement mode, then press to turn off the meter.

Chart -1 Keypad operations and descriptions

Keypad

Operations

Descriptions

Short 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.

Short/long press

Select measurement parameters:

●pH 850 pH meter: →

●EC 850 Conductivity meter: →

●PC 850 pH/Conductivity meter: →→→

●In the measurement mode: long press to enter manual temperature

compensation mode, then long press or momentary press this key

to change the temperature value (only one direction).

●In the parameter setup 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

setup (only one direction)

Short press

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

mode

●In the calibration mode or the parameter setup and auto lock-up

(HOLD) mode, press this key to return to the measurement mode

Short press

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

setup main menu

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

●In the parameter setup mode, press this key to select programs

PC850 Version 1.0

3.3. Meter socket Chart-2 Sockets for Meters

3.4. Reading Stability Display Mode

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

see Diagram –4. 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 P1.3, 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 Lock-Up Display Mode

Select On from parameter P4.6 to turn on automatic lock-up display function.

When the reading value stabilizes more than 10 seconds, the meter locks the

measuring value automatically and displays HOLD icon, see Diagram –5.

In the HOLD mode, press to release lock-up.

3.6. Automatic Power-off

The meter will be power-off if there is no operation for 20 minutes. The time of auto power-off can be

set in parameter setting P3.2

3.7. Temperature Adjustment

When the temperature probe does not connect to the meter, long press key, temperature value

flashes, then long press key or short press key to change the temperature value in one

way, and press key to make confirmation.

Models

Photos

Description

pH 850 pH meter

●BNC socket (right) —connect

pH electrode or ORP electrode,

●RCA socket (middle) —connect

temperature probe

EC 850 Conductivity

meter

●Eight-pin socket (left) —connect

conductivity electrode

PC 850 pH/Conductivity

meter

●BNC socket (right) —connect pH

electrode or ORP electrode,

●RCA socket (middle) —connect

temperature probe

●Eight-pin socket (left) —connect

conductivity electrode

Diagram- 4

Diagram - 5

PC850 Version 1.0

4. pH Measurement

4.1. pH Electrode Information

The meter matches 201T-F plastic three-in-one combination pH electrode with built-in temperature

sensor to realize automatic temperature compensation. Electrode housing adopts polycarbonate

engineering plastics which is corrosion and impact resistant. The BNC socket of electrode connects

pH socket; RCA socket connects temperature socket. When dip the 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, 3 solutions for

each series which are corresponding to calibration indication icons. Please see Chart - 3 for the two

series of standard buffer solution.

Chart - 3 pH standard buffer solution series

Icons

pH standard buffer solution series

USA series

NIST series

Three-point

calibration

4.00 pH

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 points 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.

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 →4.00 pH

6.86 pH →4.01 pH

Range< 7.00pH

7.00 pH →10.01 pH

6.86 pH →9.18 pH

Range> 7.00pH

Three-point

calibration

7.00→4.00→10.01 pH

6.86→4.01→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 (≤ ±0.03pH), the meter should be calibrated immediately before

PC850 Version 1.0

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:

(a) New probe or probe that has not been used for a long time

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

(c)After measuring a solution that contains fluoride or a concentrated organic solution

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

4.3. pH Meter Calibration (with an example of three-point calibration)

4.3.1. First point calibration

(a) Press key to enter into the calibration mode, “ CAL 1 ”

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

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

(b) 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. When stable icon

displays on LCD, press key to calibrate, then 1st point calibration is

finished, the meter enters in measurement mode of one-point calibration.

Calibration guide icon displays at the bottom left of LCD. See Diagram-6.

4.3.2. Second point calibration

Press key to enter into the calibration mode, “ CAL 2 ”

blinks at the top right of LCD indicating to make the 2nd point calibration.

Rinse pH electrode 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 LCD. When the meter locks 4.00 pH, stable icon displays

on LCD, press key to calibrate the meter. LCD will display electrode

slope of acidity range, then 2nd point calibration is finished, the meter enters in measurement mode

of two-point calibration. Calibration guide icons display at the bottom left of LCD.

4.3.3. Third point calibration

Press key to enter into the calibration mode, “ CAL 3 ”blinks at the top right of LCD indicating

to make the 3rd point calibration. Rinse pH electrode 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 LCD. When the meter locks 10.01pH, stable icon displays on

LCD, press key to calibrate the meter. LCD will display electrode slope of alkalinity range, then

Diagram- 6

PC850 Version 1.0

3rd point calibration is finished, the meter enters in measurement mode of three-point calibration.

Calibration guide icons display at the bottom left of LCD.

Notes:

(a) The meter can perform 1-3 points calibration. When the 1st point calibration is done, the meter

will enter in measurement mode of one-point calibration. Two-point and three-point calibration are in

the same manner.

(b) During the calibration process, if measuring value is not stable yet (when does not appear

and the key is pressed, then Er 2 displays. See chart –5.

4.4. Sample Test

4.4.1. Rinse pH electrode in pure water, allow it to dry, and submerge it in tested solution. Stir the

solution briefly and allow it to stay in the tested solution until icon appears on LCD and a stable

reading is reached, which is the pH value of tested solution. Diagram –7 is the calibration and

measurement process of pH meter

Diagram –7 Calibration and measurement process of pH meter

4.4.2. Self-diagnosis information

During the process of calibration and measurement, the meter has self-diagnosis functions,

indicating the relative information as below, please refer to chart –5.

Press to turn

on the meter

Press key to

enter into the

calibration mode.

Submerge the electrode

in pH7.00 solution, press

key when icon

appears.

One-point calibration

is done, the meter

enter in measurement

mode

Two point calibration

is done, the meter

enter in measurement

mode

。

Submerge the electrode

in pH4.00 solution, press

key when icon

appears.

Submerge the electrode

in pH10.01solution,press

key when icon

appears.

Three point

calibration is done,

the meter enter in

measurement mode

Sample

Test

1st point calibration

3rd point calibration

Press key to

enter into the

calibration mode.

Press key to

enter into the

calibration mode.

2nd point

calibration

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