ABB 2410 Manual de usuario

Hand-Held pH Meter/Simulator

Model 2410

Instruction Manual

IM/2410_6

ABB

BS EN ISO 9001:2000

Cert. No. Q5907

The Company

We are an established world force in the design and manufacture of

instrumentation for industrial process control, flow measurement, gas and

liquid analysis and environmental applications.

As a part of ABB, a world leader in process automation technology, we

offer customers application expertise, service and support worldwide.

We are committed to teamwork, high quality manufacturing, advanced

technology and unrivalled service and support.

The quality, accuracy and performance of the Company’s products result

from over 100 years experience, combined with a continuous program of

innovative design and development to incorporate the latest technology.

The UKAS Calibration Laboratory No. 0255 is just one of the ten flow

calibration plants operated by the Company, and is indicative of our

dedication to quality and accuracy.

EN 29001 (ISO 9001)

Lenno, Italy – Cert. No. 9/90A

Health and Safety

To ensure that our products are safe and without risk to health, the following points must be noted:

1. The relevant sections of these instructions must be read carefully before proceeding.

2. Warning labels on containers and packages must be observed.

3. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel

and in accordance with the information given.

4. Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating

in conditions of high pressure and/or temperature.

5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry.

Normal safe handling procedures must be used.

6. When disposing of chemicals ensure that no two chemicals are mixed.

Safety advice concerning the use of the equipment described in this manual or any relevant hazard data

sheets (where applicable) may be obtained from the Company address on the back cover, together with

servicing and spares information.

Electrical Safety

This instrument complies with the requirements of CEI/IEC 61010-1:2001-2 "Safety requirements for electrical

equipment for measurement, control, and laboratory use". If the instrument is used in a manner NOT specified by the

Company, the protection provided by the instrument may be impaired.

Symbols

One or more of the following symbols may appear on the instrument labelling:

Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use

of this manual for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part

without prior approval of the Technical Communications Department.

Warning – Refer to the manual for instructions

Caution – Risk of electric shock

Protective earth (ground) terminal

Earth (ground) terminal

Direct current supply only

Alternating current supply only

Both direct and alternating current supply

The equipment is protected

through double insulation

1 INTRODUCTION ................................... 1

2 PREPARATION ...................................... 2

2.1 Optional Accessories .................... 2

3 CONTROLS ........................................... 2

3.1 Familiarisation with Controls .......... 2

4OPERATION AS A SIMULATOR ........... 3

4.1 Prepare a pH Analyzer

for Testing ..................................... 3

4.2 Prepare for pH Simulation

(pH output only) – Fig. 4.1 ............. 3

4.3 Calibrating 4500 and 4600 Series

Analyzers ...................................... 4

4.3.1 Calibration Mode – Fig. 4.2 4

4.3.2 Checking Temperature

Compensation – Fig. 4.3 ... 5

4.4 Calibrating Conventional pH

Analyzers ...................................... 5

4.4.1 Calibration Mode – Fig. 4.3 5

4.4.2 Checking Temperature

Compensation – Fig. 4.3 ... 5

4.5 Checking Input Impedance of a pH

Analyzer – Fig. 4.4 ........................ 7

5OPERATION AS A METER ................... 7

5.1 Calibration for pH Measurements –

Fig. 5.1 ......................................... 7

5.1.1 pH Measurement – Fig. 5.2 8

5.1.2 Temperature Measurement –

Fig. 5.3 .............................. 8

5.1.3 mV/Redox (ORP)

Measurement – Fig. 5.4 ..... 9

6MAINTENANCE .................................... 9

6.1 Replacing the Battery – Fig. 6.1 .... 9

7 SPECIFICATION .................................. 10

NOTES ...................................................... 11

CONTENTS 1INTRODUCTION

The Model 2410 pH meter/simulator is a

battery-operated instrument designed for

measuring pH, Redox and temperature when

used with the appropriate sensors. It can also

be used as a simulator for injecting input

signals when servicing pH instruments.

The unit can inject any pH value from 0 to

14 pH and any millivolt value from –1000 to

1000 mV in 1 mV increments. A high

impedance output (1x109Ω) can be switched

into the circuit to simulate the resistance of a

glass electrode. A 100k Ωreference check is

also available for detection of reference to

earth leaks.

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Temp mV pH

40 60

100

CALIB

SLOPE

ON OFF

6.98

Auto

Switch-off

Moulding

Battery

Compartment

Output

Adjustment

Control

Function

Switch

BNC

Socket

Power

Switch

Mode

Switch

Temperature

Control

Slope

Control

Calibration

Control

Earth

Socket

Temperature

Socket

(accepts 3mm

jack plug)

3 / Digit

LCD

Fig. 3.1 Familiarisation with Controls

2.1 Optional Accessories

There are a number of accessories available which are supplied to order dependent on the

operating requirements:

7730-160 Kit of test leads

1413-400 Combination pH electrode (epoxy bodied), 1m (3.25 ft), BNC termination

1441-400 Combination Redox (ORP) electrode, 1m (3.25 ft), BNC termination

3055-100 Pt100 temperature probe

1411-400 Combination pH electrode (glass bodied), 1m (3.25 ft), BNC termination

1415-400 Combination spear pH electrode, 1m (3.25 ft), BNC termination

0400-135 Buffer powder kit

*Comprising:

BNC to BNC lead (part no. 7730130)

Earth lead (part no. 7730150)

BNC to tags lead (part no. 0312740)

3.1 Familiarisation with Controls

Instrument controls are as detailed in Fig. 3.1 below.

2PREPARATION

3CONTROLS

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Tem p mV pH

40 60

100

CALIB

SLOPE

ON OFF

4 5

4.1 Prepare a pH Analyzer

for Testing

a) Ensure that the pH analyzer to be tested is

correctly earthed through its power supply

earth lead (where applicable), then switch

on the power supply (it may be necessary

to allow some older types of analyzer to

warm up).

b) Set the pH analyzer under test to the

CHECK position (where applicable) and

disconnect the electrodes from the input

terminals (refer to the relevant instruction

manual).

c) Connect a suitable lead from the input

terminals of the pH analyzer to the Model

2410's BNC connector. If using a lead with

tag terminations, connect the core (white)

to the glass electrode terminal and the

screen (black) to the reference terminal.

d) Manual temperature compensation – set the

temperature control on the pH analyzer

under test to that of the ambient

temperature.

Automatic temperature compensation –

connect a suitable decade resistance box

to the analyzer under test in place of the

temperature compensator. Set the

resistance box to the value equivalent to

one of the temperatures in Table 4.1, e.g.

10°C, 20°C etc.

e) If testing a pH analyzer with differential

amplifier (e.g. Models 9180 or 4530/40),

connect the earth socket on the Model

2410 (see Fig. 3.1) to the pH analyzer

solution earth terminal using the earth wire

supplied.

4.2 Prepare for pH Simulation

(pH output only) – Fig. 4.1

Before using the 2410 as a pH simulator it is

necessary to standardise the output for

correct pH units with respect to the voltage

(mV) output.

1Set the 'Temp °C' control to 25°C.

2Set the Function switch to 'CALIBRATE'.

3Set the Power switch to 'ON'.

4Set the Mode switch to 'mV' and use the

'OUTPUT ADJUST' control to set '000' on

the display.

5Set the Mode switch to 'pH'.

6Adjust the 'CALIB' control to set '7.00' on

the display.

7Set the Mode switch to 'mV' and use the

'OUTPUT ADJUST' control to set '177' on

the display.

8Set the Mode switch to 'pH'.

9Adjust the 'SLOPE' control to set '4.00' on

the display.

The simulator can now be used in either the

'pH' or 'mV' output modes.

Note.If the 2410 is always used as

a simulator, the above procedure

need only be carried out once,

unless the control settings are

disturbed.

Fig. 4.1 Preparation for pH Simulation

4OPERATION AS A SIMULATOR

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Temp mV pH

40 60

100

CALIB

SLOPE

ON OFF

2 3

1479 01

tCHpVmHpVmHpVmHpVmHpVm

080.18.023000.46.26101.74.5–574.91.431–072.012.771–

01 90.10.233799.37.86150.78.2–743.99.131–451.012.771–

02 90.18.343000.45.47100.70 332.99.921–540.011.771–

52 90.16.943500.42.77199.66.0281.91.921–599.92.771–

03 01.19.453110.48.97179.68.1431.94.821–849.93.771–

04 01.16.663720.47.48179.69.1150.94.721–668.91.871–

05 11.13.873050.42.98179.69.1389.81.721–008.95.971–

06 11.14.983080.40.39179.60.2239.87.721–357.90.281–

07 11.10.104611.44.69199.67.0898.82.921–827.97.581–

08 21.10.214951.41.99130.71.2–088.87.131–527.99.091–

09 31.10.324802.42.10280.78.5–048.86.231–057.92.891–

59 —— 532.40.202——098.81.831–077.93.202–

…4 OPERATION AS A SIMULATOR

4.3 Calibrating 4500 and 4600

Series Analyzers

4.3.1 Calibration Mode – Fig. 4.2

ABB 4500 and 4600 Series analyzers

incorporate buffer values within their memories

for automatic calibration. Table 4.1 gives the

millivolt value for different temperature values

for the five standard buffers stored in the

Models 4530/40. Only the 4 and 9 values apply

to the Models 4535/45 and 4630/35.

When checking 4500 and 4600 Series

analyzers for accuracy, or when determining

the correct functioning of the automatic

temperature compensation, refer to Table 4.1

to ascertain the required millivolt value

equivalent to a pH value at a given

temperature.

Note.Before carrying out the

following procedure, check the

electrode connections – core to

glass, screen to reference and earth

connection to solution earth of the

instrument (Models 4530 and 4540

only).

Refer to Fig. 4.2 and:

1Set the Function switch to 'CALIBRATE'.

2Set the Mode switch to 'pH' or 'mV'

(dependent on requirement).

3Set the Power switch to 'ON'.

Carry out an automatic pH calibration check

using the 4500 and 4600 Series calibration

procedure as detailed in the appropriate

instruction manual.

4Use the 'OUTPUT ADJUST' control to

inject the required pH or millivolt value,

selected from Table 4.1.

The same procedure can be used to check the

instrument in the Manual Calibration mode if

required.

Note.Once a successful pH

calibration has been achieved,

operate the FUNCTION switch on

the transmitter and then use the

simulator to inject alternative pH

values to check the performance of

the instrument.

Carry out the impedance tests as described on

page 7.

Fig. 4.2 Calibration Mode

Table 4.1 mV Equivalents for 4500 and 4600 Series Instruments Buffer Values

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Temp mV pH

40 60

100

CALIB

SLOPE

ON OFF

2 3

4OPERATION AS A SIMULATOR…

4.3.2 Checking Temperature

Compensation – Fig. 4.3

a) Calibrate the Model 2410 as detailed in

Section 4.3.1.

b) Programme the instrument under test for

manual temperature compensation and

set the temperature to 0°C.

With reference to Fig. 4.3:

Set the Function switch to 'CALIBRATE'.

Set the Mode switch to 'mV'.

Set the Power switch to 'ON'.

Use the 'OUTPUT ADJUST' control to set

163 mV on the Model 2410's display

(rounded up from 162.6mV in Table 4.1).

The instrument under test should read

4.00.

Use the 'OUTPUT ADJUST' control to set

–134 mV on the Model 2410's display

(rounded down from 134.1 mV in Table

4.1). The instrument under test should

Note.The instrument under test

should read 9.47 as this is the

correct value for the 9.00 buffer at

0°C.

Repeat steps 4 and 5 at 50°C and 80°C using

the corresponding millivolt equivalent.

4.4 Calibrating Conventional pH

Analyzers

4.4.1 Calibration Mode – Fig. 4.3

Set the Function switch to 'CALIBRATE'.

Set the Mode switch to either 'pH' or 'mV'

dependant on the calibration required.

Set the Power switch to 'ON'.

Use the 'OUTPUT ADJUST' control to

obtain an appropriate calibration value on

the digital display of the Model 2410, e.g.

7pH (if pH units selected).

Adjust the reading on the pH analyzer under

test to 7.00 pH using the adjust buffer,

standardise or calibrate control on that

instrument, as applicable.

Use the 'OUTPUT ADJUST' control to give

0, 2, 4, 6, 8, 10, 12 and 14 pH to check the

accuracy of the pH analyzer.

Alternatively, if mV units are selected,

adjust to the corresponding millivolt

equivalents from Table 4.2.

4.4.2 Checking Temperature

Compensation – Fig. 4.3

a) Calibrate the Model 2410 as detailed in

Section 4.4.1.

b) Set the manual temperature control on the

instrument under test to 10°C.

Refer to Fig. 4.3 and:

Set the Function switch to 'CALIBRATE'.

Set the Mode switch to 'mV'.

Set the Power switch to 'ON'.

Use the 'OUTPUT ADJUST' control to set

the appropriate millivolt outputs for 4, 7

and 9 pH (at 10°C) on the Model 2410

display from Table 4.2.

Check the reading on the pH analyzer

under test for each value.

Repeat the check with the temperature control

set to 50°C and 100°C.

Fig. 4.3 Temperature Compensation and

Calibration Mode

…4 OPERATION AS A SIMULATOR

Table 4.2 Millivolt Equivalent of pH v Temperature

tC0123456789 0111213141

02– 36.15304.10361.15239.00296.05164.00132.050 32.05–64.001–96.051–39.002–61.152–04.103–36.153–

01– 25.56303.31380.16278.80256.65134.40122.250 22.25–34.401–56.651–78.802–80.162–03.313–25.563–

014.97312.52310.17208.61206.26104.80102.450 02.45–04.801–06.261–08.612–10.172–12.523–14.973–

01 03.39311.73339.08247.42265.86173.21191.650 91.65–73.211–65.861–47.422–39.082–11.733–03.393–

02 91.70420.94358.09286.23215.47143.61171.850 71.85–43.611–15.471–86.232–58.092–20.943–91.704–

03 80.12429.06377.00326.04264.08113.02151.060 51.06–13.021–64.081–26.042–77.003–29.063–80.124–

04 79.43438.27396,01355.84214.68182.42141.260 41.26–82.421–14.681–55.842–96.013–38.273–79.434–

05 68.84437.78316.02394.65273.29142.82121.460 21.46–42.821–73.291–94.652–16.023–37.783–68.844–

06 57.26446.69335.03334.46223.89112.23111.660 11.66–12.231–23.891–34.462–35.033–46.693–57.264–

07 46.67445.80454.04363.27272.40281.63190.860 90.86–81.631–72.402–63.272–54.043–45.804–46.674–

08 35.09454.02483.05303.08232.01251.04180.070 80.07–51.041–32.012–03.082–83.053–54.024–35.094–

09 24.40563.23403.06342.88281.61221.44160.270 60.27–21.441–81.612–42.882–03.063–53.234–24.405–

001 30.81562.44422.07371.69231.22290.84140.470 40.47–90.841–31.222–71.692–22.073–62.444–30.815–

011 91.23571.65441.08311.40380.82260.25130.670 30.67–60.251–80.822–11.403–41.083–71.654–91.235–

021 80.64570.86460.09350.21340.43220.65110.870 10.87–20.651–40.432–50.213–61.093–70.864–80.645–

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Temp mV pH

40 60

100

CALIB

SLOPE

ON OFF

2 3

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Tem p mV pH

40 60

100

CALIB

SLOPE

ON OFF

5 6

4.5 Checking Input Impedance of a

pH Analyzer – Fig. 4.4

All pH measuring instruments require an

extremely high input impedance (greater than

1012 ) to operate corr ectly. If the input

impedance is degraded (due to contamination

of the connection block or connection cable)

the instrument may function correctly with a

low impedance signal, but gives incorrect

readings (low or high or, in some cases, off-

scale) when connected to an electrode pair.

The Model 2410 has the facility to check the

input impedance of the glass electrode using

the 1000M Ωposition of the Function switch

and the reference electrode input using the

100K Ωposition.

Refer to Fig. 4.4 and:

Set the Function switch to 'CALIBRATE'.

Set the Mode switch to 'pH'.

Set the Power switch to 'ON'.

Use the 'OUTPUT ADJUST' control to set

an appropriate pH value, e.g. 10 pH.

Set the Function switch to '1000M Ω'.

After an initial 'spike', the reading on the

pH analyzer under test should return to

within 0.1 pH of 10.00 pH. If the change in

the reading is greater than 0.1 pH the input

impedance is too low.

Repeat step 5 but setting the Function

switch to '100k Ω'.

For laboratory analyzers, the most likely

cause of the above is the coaxial input cable or

the BNC socket on the instrument under test.

For industrial systems, the cause is likely to

be attributed to:

the junction box in the electrode system

the wall mounting junction box

the interconnection cable

the instrument (less likely).

5.1 Calibration for pH

Measurements – Fig. 5.1

For optimum measurement accuracy the

calibration procedure should be carried out at

frequent intervals.

Prepare 4 pH and 9 pH buffer solutions.

Connect the electrode to the BNC socket.

Set the Function switch to 'MEASURE'.

Set the Mode switch to 'pH'.

Set the 'TEMP °C' control to the

temperature of the buffer solutions.

Set the Power switch to 'ON'.

Fig. 4.4 Checking the Input Impedance

Fig. 5.1 Calibration for pH Measurement

…4 OPERATION AS A SIMULATOR 5OPERATION AS A METER

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Temp mV pH

40 60

100

CALIB

SLOPE

ON OFF

TEMP

C

OUTPUT

ADJUST

1000M

100k

CALIBRATE

MEASURE

TEMP

Tem p mV pH

40 60

100

CALIB

SLOPE

ON OFF

…5 OPERATION AS A METER

Immerse the combination pH electrode in the

4pH buffer solution and allow the displayed

reading to stabilise.

Adjust the 'CALIB' control to achieve a

4pH reading on the digital display.

Remove the electrode from the buffer

solution and wash the electrode using

demineralised water. Carefully wipe the

excess water from the electrode using a

soft tissue.

Immerse the electrode in the 9 pH buffer

solution and allow the displayed reading to

stabilise.

Adjust the 'SLOPE', control to achieve a

9pH reading on the digital display.

Repeat

and

to obtain the best

accuracy.

5.1.1 pH Measurement – Fig. 5.2

Connect the electrode to the BNC socket.

Set the Function switch to 'MEASURE'.

Set the Mode switch to 'pH'.

4Set the 'TEMP °C' control to the

temperature of the sample solution.

Set the Power switch to 'ON'.

Immerse the combination pH electrode in the

sample solution and note the pH value when

the display has stabilised.

5.1.2 Temperature Measurement –

Fig. 5.3

Set the Function switch to 'MEASURE'.

Set the Mode switch to 'TEMP'.

Connect the temperature probe to the

temperature socket (3mm jack plug).

4Set the Power switch to 'ON'.

Immerse the probe approximately 1 inch below

the surface of the sample solution.

Note the temperature when the display has

stabilised.

Fig. 5.2 pH Measurement

Fig. 5.3 Temperature Measurement

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