Eutech Instruments pH 1100, pH 2100 User Manual

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Instruction Manual pH 1100/ pH 2100

Bench pH/Ion Meter

Technology Made Easy ...

68X090818 Rev. 3 07/03

Instruction Manual

pH 1100/ 2100

PREFACE

Thank you for selecting the pH 1100/ 2100 benchtop meter. This meter measure pH, millivolts, relative millivolts and temperature. The pH 2100 meter also measures ion concentration.

The instruction manual serves to explain the use of the pH 1100/ 2100 bench meter as a step-by-step operational guide to help you familiarize with the meter’s features and functions. It is structured sequentially with illustration of diagrams that explains the various functions and setup menus available.

This manual is written to cover as many anticipated applications and uses of the pH 1100/ 2100 Bench meter as possible. If there are doubts in the use of the meter, please do not hesitate to contact the nearest Authorized Distributor or Customer Service Dept. for assistance.

Eutech Instruments/ Oakton Instruments reserve the rights to change, make improvement and modify specifications without prior notice and cannot accept any responsibility for damage or malfunction to the instrument caused by improper use.

Copyright © 2002

Eutech Instruments Pte. Ltd.

Oakton Instruments

All rights reserved.

Rev. 3 07/03

Instruction Manual

pH 1100/ 2100

TABLE OF CONTENTS

1

INTRODUCTION

6

 

1.1

Introducing the Bench Meter Series

6

 

1.2

Keypad

7

 

1.3

Rear Panel

8

 

1.4

Electrode Holder

9

2

STARTING UP

10

 

2.1

Back Panel Connections

10

 

2.2

Powering up and powering down

10

 

2.2.1

Powering up

10

 

2.2.2

Powering down

10

3 PH CALIBRATION & MEASUREMENT

11

 

3.1

pH calibration

11

 

3.1.1

Automatic Temperature Compensation (ATC)

11

 

3.1.2

Starting pH calibration

12

 

3.1.3

Standard pH buffer calibration

13

 

3.1.4

Custom pH buffer calibration

14

 

3.1.5

Calibration error messages

15

 

3.2

pH measurement

16

 

3.2.1

Automatic temperature compensation

16

 

3.2.2

Adjusting manual temperature compensation

16

 

3.2.3

Taking pH Measurements

17

4 mV CALIBRATION AND MEASUREMENT

18

 

4.1

mV Calibration

18

 

4.1.1

mV Calibration error message

18

 

4.2

mV Measurement

19

5 ION CALIBRATION AND MEASUREMENT (ONLY APPLICABLE FOR pH 2100)

20

 

5.1

Ion calibration

20

 

5.2

Ion calibration error messages

21

 

5.3

Ion measurement

22

6

MEMORY FUNCTIONS

23

 

6.1

Memory input

23

 

6.1.1

Manually storing a reading into memory

23

 

6.2

Memory recall

24

 

6.2.1

Recalling readings in manual recall mode

24

 

6.2.2

Recalling readings in automatic recall mode

24

7

STABILITY INDICATOR

25

8

ALARM FUNCTIONS

25

 

8.1

High and Low measurement alarm

25

 

8.2

Calibration due alarm

25

9

TEMPERATURE CALIBRATION

26

 

9.1

Temperature Calibration

26

 

9.2

Temperature Calibration Error Messages

26

10 SETUP MODE

27

 

10.1

Setup mode overview

27

 

10.1.1

pH/Temperature setup submenus

27

 

10.1.2

mV setup submenus

28

 

10.1.3

Ion setup submenus (pH 2100 only)

28

 

10.1.4

Meter general configuration setup submenus

29

 

10.2

pH/ temperature setup mode

30

 

10.2.1

Entering pH/temperature setup mode

30

 

10.2.2

pH buffer setup program P1.0

30

 

10.2.3

pH resolution setup program P1.1

31

 

10.2.4

Temperature unit setup program P1.2

31

 

10.2.5

pH Measurement Alarm Setup Program P1.3

32

 

10.2.6

pH Calibration Due Alarm Setup program P1.4

33

 

10.2.7

Stability Setup Program P1.5

34

 

10.2.8

View pH calibration data setup program P1.6

35

Instruction Manual

pH 1100/ 2100

10.2.9 pH calibration data reset setup program P1.7

36

10.3

mV setup mode

37

10.3.1 Entering mV setup mode

37

10.3.2 mV measurement alarm setup program P2.0

38

10.3.3 mV calibration due alarm setup program P2.1

39

10.3.4 Stability setup program P2.2

40

10.3.5 View mV calibration data setup program P2.3

41

10.3.6 mV calibration data reset setup program P2.4

42

10.4

Ion setup mode (pH 2100 meter only)

43

10.4.1 Entering ion setup mode

43

10.4.2 Ion unit setup mode P3.0

43

10.4.3 Ion measurement alarm setup program P3.1

44

10.4.4 Ion calibration due alarm setup program P3.2

45

10.4.5 Stability setup program P3.3

46

10.4.6 Ion mode setup program P3.4

47

10.4.7 View ion calibration data setup program P3.5

48

10.4.8 Ion calibration data reset setup program P3.6

49

10.5

Meter general configuration setup mode

50

10.5.1 Entering meter general setup mode

50

10.5.2 Date/time setup mode P4.0

50

10.5.3 Backlight setup mode P4.1

51

10.5.4 Data log setup mode P4.2

52

10.5.5 Memory recall setup mode P4.3

52

10.5.6 Communication setup mode P4.4

53

10.5.7 Data transfer setup mode P4.5

53

10.5.8 Memory clear setup mode P4.6

54

10.5.9 Meter reset setup mode P4.7

54

11 ELECTRODE CARE

55

11.1

Electrode Activation

55

11.2

Electrode Maintenance

55

11.3

Storing pH/ORP electrodes

55

12 RS 232 COMMUNICATION

56

12.1

Using with printer

56

12.1.1 Sending data to printer

56

12.2

Using with computer

56

13 ADDITIONAL INFORMATION

57

13.1

pH and Temperature

57

13.2

pH Buffer Calibration Solution

57

13.3

Standard pH Buffers

57

14 SUMMARY OF DEFAULT SETTINGS / OPTIONS

58

15 TROUBLESHOOTING & ERROR MESSAGES

59

16 SPECIFICATIONS

60

17 ACCESSORIES

61

18 WARRANTY

62

Instruction Manual

pH 1100/ 2100

1 INTRODUCTION

1.1Introducing the Bench Meter Series

The pH 1100/ 2100 bench meter is microprocessor-based which incorporates new ASIC (Application Specific Integrated Circuit). It is designed with convenience in mind and offers many advanced, user-friendly features. The meters are capable of storing and recalling up to 100 data sets in its non-volatile memory. In addition, as a space saver, an optional swivel electrode holder can be attached at the either side of bench meter for resting the electrodes and probes during operation.

The pH 1100/ 2100-- bench meter measures pH, millivolts, relative millivolts and temperature. The pH 2100 meter also measures ion concentration. These meters are equipped with a large customized LCD (Liquid Crystal Display) with simultaneous display of the measured values for easy reading. It is most ideal for routine pH/Ion Concentration measurement in indoor applications.

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Instruction Manual

pH 1100/ 2100

1.2Keypad

See Figure 1.

A large membrane keypad with touch feedback makes the meter easy to use. Names and symbols describe the function button controls.

Figure 1: Membrane Keypad

ON/OFF

Power meter On or Off

ENTER

Confirm selection in all modes of operations;

 

Scroll through the sub-menus program in the SETUP modes

EXIT

Exit from current modes of operations;

 

Exit from calibration mode after 3rd point calibration (for pH/Ion)

CAL / ¾

Enter into calibration modes of the meter;

 

Select or scroll to the next options available

MODE

Select the measurement modes:- pH, Ion Concentration, mV, Relative mV

 

 

HOLD

Freeze the displayed value; allow you to print the held reading or store it into

 

memory

SETUP

Enter SETUP mode of the meter for customization of meter functions as well as

 

view some diagnostic functions (refer to the table for details of SETUP menus)

¿/ MI

Store the displayed value into memory;

 

Increment values or scroll through the next options available

À/ MR

Recall stored values from the memory in the Last-In-First-Out (LIFO) sequence;

 

Decrement values or scroll through the next options available

PRINT

Send measured data being measured or data stored in the memory to a

 

peripheral device via the RS232C port of meter

Numeric Keys (0-9 & .)

Enter numeric values and decimal point at appropriate places

- (Minus)

Enter negative sign at appropriate places

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pH 1100/ 2100

1.3Rear Panel

See Figure 2.

The pH 1100/ 2100 meters provide a complete set of input connections for the various accessories commonly used. Listed in the table below are details of the connections that you can make.

Figure 2: Rear View of Meter

Connector

Function

ATC

For phono jack connection from the temperature probe for Automatic Temperature Compensation.

 

The probe should be a 30KΩ thermistor probe.

 

 

INPUT

For connecting sensors with a BNC connector to the meter. The meter accepts any pH, ORP or ISE

 

electrode with a BNC connector. Always make sure that the connector is clean and dry.

 

 

REF

For connection to the pin tip type reference electrode normally used with half cell (mono) type pH or

 

ISE electrodes.

 

 

REC

For connection to the strip chart recorder.

 

 

GND

For connection to the ground earth jack (standard pin tip connectors).

 

 

RS232

For connection to the RS232C serial port.

 

 

DC

For connection of the AC adapter power supply (included).

 

 

 

 

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Eutech Instruments pH 1100, pH 2100 User Manual

Instruction Manual

pH 1100/ 2100

1.4Electrode Holder

The electrode holder is included in the same box as the meter.

To attach the electrode holder to the meter:

1.The electrode holder base attached to the bottom of the meter comes in the shipping position. See Figure 3.

2.Use a Phillips screwdriver to remove the screw holding the electrode holder in shipping position. See Figure 3.

3.Slide the electrode base away from the meter until the second screw slot lines up with the original screw hole. Use the screw removed earlier to secure electrode holder base into position. See Figure 3.

4.The electrode holder arm is reversible. If desired, remove screw holding electrode holder base and slide base out of brackets. Slide base into brackets on opposite side and replace screw.

5.To install the electrode arm, turn meter back to the upright position. See Figure 4.

6.Line up the hole on the base of the electrode holder arm with the peg on the electrode holder base. Slide the hole securely onto the electrode holder base.

See Figure 4.

Figure 3: Bottom of Meter

7.The electrode arm is now ready to swing into desired position.

Figure 4: Fix electrode holder arm to holder base

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Instruction Manual

pH 1100/ 2100

2 STARTING UP

Attention: Do not get water on the BNC connector during operation.

Avoid touching the connector with soiled or wet hands.

2.1Back Panel Connections

Refer back to Figure 2. Make the necessary connections as mentioned in Section 1.3 Rear Panel, pg 8.

2.2Powering up and powering down

2.2.1Powering up

1.When first connected to the power supply, the meter runs a self test, the display flashes Hardware Testing... Status: Pass.

See Figure 5.

2.It then displays current date and time. See Figure 6. This display will also appear when the meter is turned off while still connected to the power supply. See Figure 6.

3.See Figure 7. To turn the meter on press ON/OFF. The upper display flashes Bench pH/Ion 2100 for the pH 2100, (Display flashes Bench pH 1100 for the pH 1100 meter.) and then the lower display flashes SW Rev 1.20. See

Figure 7.

4.The display flashes System Initializing, Please wait...

See Figure 8.

5.If this is the first power up since the power was connected, you must indicate desired measurement mode. Use >/CAL to select. The mode selected will flash. See Figure 9. Press ENTER to confirm. The meter then enters measurement mode.

6.After initial startup, the meter will automatically return to the measurement mode previously selected as long as power connection is maintained.

2.2.2Powering down

1.To turn the meter off press ON/OFF. The display flashes

System Shutting Down, Please wait... See Figure 10. Then, the date and time display will appear. See Figure 6. The date and time will continue to display until the power supply is disconnected.

Hardware Testing. . . .

Status: Pass

 

Figure 5

 

 

Date

Time

Jan 25 2002

09:09:30

 

 

 

Figure 6

Bench pH/Ion 2100

SW Rev 1.20

Figure 7

System Initializing

Please wait. . .

Figure 8

pH/Temp mV Ion

Select & Press ENTER

Figure 9

System Shutting Down

Please wait. . .

Figure 10

10

Instruction Manual

pH 1100/ 2100

3 PH CALIBRATION & MEASUREMENT

3.1pH calibration

This meter is capable of up to 5 point calibration with selectable buffer sets (USA, NIST, Bf1, Bf2 or any 5 custom buffers of your choice). The meter retains stored pH calibrations even when turned off. For best accuracy, we recommend that

you perform at least a 2-point calibration using buffers that bracket (one above and one below) the expected sample range. A single point cal is possible only at the offset points namely 7.00 or 6.86. For custom buffer sets, you must

perform at least a 2 point calibration.

Selectable buffer sets:

USA: 1.68, 4.01, 7.00, 10.01, 12.45

NIST: 1.68, 4.01, 6.86, 9.18, 12.45

Bf1: 1.68, 4.01, 6.86, 10.01, 12.45

Bf2: 1.68, 4.01, 7.00, 9.18, 12.45

Any 5 user selected custom buffers

To select which buffer sets you wish to use see Section 10.2.2: Program pH Buffer Setup: P1.0 in the pH/Temp setup mode (page 30).

When you recalibrate your meter, old pH calibration points are replaced on a point by point basis. For example, if you previously calibrated your meter at pH 4.01, 7.00, and 10.01, and you recalibrate at pH 7.00, the meter retains the old calibration data at pH 4.01 and pH 10.01. To view current calibration points, see Section 10.2.8: Program pH Cal Data P1.6 in the pH/Temp setup mode (page 35).

If you choose to recalibrate to only 1 or 2 pH values, the older calibration values you do not calibrate to will remain stored. These old stored calibration values may cause accuracy loss when your readings are close to the old values. To clear old calibration data, reset the meter as shown in Section 10.2.9 Program pH Cal Reset: P1.7 in the pH/Temp setup mode (page 36).

3.1.1Automatic Temperature Compensation (ATC)

If you will be taking pH measurement using Automatic Temperature Compensation (ATC), you must perform your pH calibration with ATC temperature probe attached. Attach the temperature probe to the rear of the meter. The ATC mode annunciator shows on the display. See Figure 11. Insert the probe into the pH buffer solution along with your pH electrode.

If manual temperature compensation is preferred, do not plug a temperature probe into the meter. The MTC mode annunciator shows on the display. See Figure 12. The default manual temperature compensation is 25.0°C. To change the manual temperature compensation default, see Section 9 Temperature Calibration for instructions (page 26).

7.179pH 25.3°C ATC

Jan 18 2002 08:46:25

Figure 11

7.179pH 25.3°C MTC

Jan 18 2002 08:46:25

Figure 12

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Instruction Manual

pH 1100/ 2100

3.1.2Starting pH calibration

1.Turn the meter ON. If the meter is not in the pH measurement mode, press EXIT and press >/CAL to select pH/Temp. The mode selected will flash. See Figure 13. Press ENTER to confirm selection. The meter is now in pH measurement mode. See Figure 14.

2.Rinse the electrode in deionized water or rinse solution. If using the ATC function with a separate temperature probe, rinse the temperature probe as well. Do not wipe the pH electrode or temperature probe dry. Wiping the probes causes static, and will create calibration and measurement instability.

3.Select pH buffer and pour into a clean container.

4.Dip the electrode and ATC probe into the calibration buffer. The end of the probes must be completely immersed into the sample. Stir probes gently to create a homogeneous sample.

5.Press >/CAL to enter the pH calibration mode. The display flashes Cal Mode Activated, Please wait....

See Figure 15. The meter is now in pH calibration mode.

pH/Temp mV Ion

Select & Press ENTER

Figure 13

7.179pH 25.3°C ATC

Jan 18 2002 08:46:25

Figure 14

Cal Mode Activated Please wait. . .

Figure 15

The meter automatically recognizes the buffers in the set you have selected in the SETUP mode. If you wish to change the buffer set selected, see Section 10.2.2, Program pH Buffer Setup: P1.0 in the pH/Temp setup mode (page 30).

If your meter is set up for standard buffers (USA, NIST, Bf1, Bf2), proceed to Section 3.1.3: Standard pH buffer calibration (page 13). If your meter is set up for custom buffers, proceed to Section 3.1.4: Custom pH buffer calibration (page 14).

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Instruction Manual

pH 1100/ 2100

3.1.3Standard pH buffer calibration

1.When entering the standard calibration mode, the first buffer calibration point for standard pH buffers is 7.000 or 6.860 (depending upon which pH buffer set is selected). The upper display shows the current reading, the lower display will show Auto Buf Scan: 7.000 (or 6.860). The upper display will flash pH until the reading has stabilized. See Figure 16. If the selected buffer value is not within ±1.0 of the measured pH value, the Auto pH Scan will continue to change until the pH buffer is within ±1.0.

2.When pH reading has stabilized, press ENTER. The lower display flashes *pH Offset Cal Done. See Figure 17. This calibration point is now stored in the meter.

If you are performing a one-point calibration, press EXIT.

The screen flashes Sys Updating...Please wait....The meter then returns to the pH measurement mode. You may now start taking pH readings.

If you are performing a multi-point calibration, go to step 3.

3.Rinse the probe with deionized water or a rinse solution, and place it in the next pH buffer. The lower display automatically scans to the next pH buffer solution.

4.Wait for the measured pH value to stabilize. The upper display will flash pH until the reading has stabilized.

5.When pH reading has stabilized, press ENTER. The lower display flashes 2 Point Cal Done * (3 if you have calibrated 3 points,4 if 4 points, etc.). See Figure 18. This calibration point is now stored in the meter. Repeat steps 3-5 for each point you wish to calibrate. When you are finished calibrating, press EXIT.

The screen flashes Sys. Updating... Please wait.... The meter then returns to the pH measurement mode. You may now start taking pH readings.

6.If you perform a complete 5-point pH calibration, when you calibrate the fifth point and press ENTER, the meter automatically returns to measurement mode. You may now start taking pH readings.

NOTE:

7.001pH 25.4°C ATC

Auto Buf Scan: 7.000

Figure 16

7.001pH 25.4°C ATC

*pH Offset Cal Done

Figure 17

10.010pH

25.4°C

ATC

2 Point

Cal Done

*

Figure 18

Error: Cal Aborted

Figure 19

To exit from pH calibration mode at any point without confirming calibration, DO NOT press ENTER in steps 2, 5 or 6. Press EXIT instead. If EXIT is press before a 1-point calibration is performed the upper display flashes Error: Cal Aborted. See Figure 19.

DO NOT REUSE SOLUTIONS AFTER CALIBRATION.

Contaminants in the solution can affect the calibration, and eventually the accuracy of the measurements.

13

Instruction Manual

pH 1100/ 2100

3.1.4Custom pH buffer calibration

1.When entering the custom calibration mode, the lower display will show Key In Std:. The upper display shows the pH buffer the electrode is dipped into. The lower display will show the same value as the upper display only if the meter has not been calibrated or if the meter has been reset. See Figure 20. If the meter has previously been calibrated, the lower display will toggle to the stored calibration point that is closest to current buffer value.

2.Using the numeric keypad (See Figure 21), enter the value of the first custom pH buffer. If you make a mistake, use the ∆/MI or /MR to highlight mistake, then retype.

3.Press ENTER when first custom pH buffer is keyed in. The display will read 1 Point Cal Done *. See Figure 22.

NOTE: In the custom pH buffer calibration mode you must perform at least a 2-point calibration, if you press EXIT before you calibrate at 2 points the screen will flash Error: Cal Aborted (See Figure 23) and will return to the pH measurement mode without confirming any calibration points.

4.Rinse the probe with deionized water or a rinse solution, and place it in the next custom pH buffer. The lower display will show Key In Std: The upper and lower displays show the pH buffer value.

5.Enter the value of the next custom pH buffer. Press ENTER when done. The display will read 2 Point Cal Done *. If you are performing a 2-point calibration, press EXIT. The screen flashes

Sys Updating...Please wait... The meter then returns to the pH measurement mode. You may now start taking pH readings.

If you are performing a 3, 4 or 5-point calibration go to step 6.

6.Repeat steps 4 and 5 for each additional custom buffer. Upon confirmation of pH buffer, the display will read 3 Point Cal Done * (4 if you have calibrated points, etc). When you have finished calibrating desired number of points, press EXIT. The screen flashes Sys. Updating... Please wait...

The meter then returns to the pH measurement mode. If you have entered 5 calibration points, the meter will automatically return to pH measurement mode. You may start taking pH readings.

77.179pH. 25.3.3°°CC ATCATC

Key In Std: 7.179

Figure 20

Numeric Keypad

Figure 21

7..179pH 25..3C°° ATC 11CalPointPointCalDone * *

Figure 22

Error: Cal Aborted

Figure 23

NOTE:

To exit from pH calibration mode at any point without confirming calibration, DO NOT press ENTER in steps 3 or 5. Press EXIT. If EXIT is pressed before a 2-point calibration is performed the upper display flashes Error: Cal Aborted. See

Figure 23.

DO NOT REUSE SOLUTIONS AFTER CALIBRATION.

Contaminants in the solution can affect the calibration, and eventually the accuracy of the measurements.

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Instruction Manual

3.1.5Calibration error messages

Standard pH Buffer Calibration:

If the first buffer value of 7.000 or 6.860 is off by more than ±1.0, the upper display will flash Error: and the lower display will read pH Offset Error. See Figure 24. Press EXIT to clear error message and return to pH measurement mode.

If any other pH buffer point is off by more than ±1.0, the upper display will flash Error: and the lower display will read pH Slope Error. See Figure 25. Press EXIT, to clear error message and return to pH measurement mode.

Custom pH Buffer Calibration:

If the each custom pH buffer value is not within ±1.0 pH of the keyed in value, the upper display will flash Error: and the lower display will read Too much offset @7pH. See Figure 26. Press EXIT to clear error message and return to pH measurement mode.

If the slope is not within 75% to 105%, the upper display will flash Error: and the lower display will read Slope out: 75% - 105%.

See Figure 27. Press EXIT to clear error message and return to pH measurement mode.

If adjacent calibration points are less than ±1.0 pH apart, the upper display will read Error: Pts too close, and the lower display will read OR slope diff. sign. See Figure 28. Press EXIT to clear error message and return to pH measurement mode.

pH 1100/ 2100

Error :

* pH Offset Error

Figure 24

Error :

* pH Slope Error

Figure 25

Error :

Too much Offset @7

Figure 26

Error :

Slope out:75% - 105%

Figure 27

Error :Pts too close Or slope diff. sign

Figure 28

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Instruction Manual

pH 1100/ 2100

3.2pH measurement

This meter is capable of taking measurements with automatic or manual temperature compensation. Automatic Temperature Compensation (ATC) occurs when a temperature sensor is plugged into the meter. If there is no temperature sensor plugged into the meter, the default setting is automatically 25°C (if the meter has never been manually set for temperature) or the last manually set value. You can manually set the temperature to match your working conditions using a separate thermometer.

3.2.1Automatic temperature compensation

For automatic temperature compensation, simply plug the temperature probe into the meter (see page 8). The ATC indicator will light on the LCD. See Figure 29.

NOTE: If you are using a temperature probe, the probe must be submersed in the liquid you are measuring.

3.2.2Adjusting manual temperature compensation

IMPORTANT: For manual compensation, you must disconnect the temperature probe.

1.Turn the meter ON. If the meter is NOT in the pH measurement mode, press EXIT and use >/CAL to select pH/Temp. The mode selected will flash. See Figure 30. Press ENTER to confirm selection. The meter is now in pH measurement mode. If the temperature probe is disconnected, the upper display will indicate MTC. See

Figure 31.

2.Press >/CAL to enter pH/Temp calibration mode. The display will flash Cal Mode Activated, Please wait... Press

>/CAL key again to enter the temperature calibration mode. The display will flash Temperature Cal Mode.

(Please

remove this gap. The copy should follow as one.)See Figure 32. The upper display then reads MTC Temp: 25.0°C and the lower display reads Key In Std: 25.0°C. See

Figure 33.

3.Check the temperature of your sample using an accurate thermometer.

4.Key in the temperature value using the numeric keypad. If you make a mistake, use the ∆/MI or /MR key to highlight mistake, then re-enter.

5.Press ENTER to confirm temperature and to return to the pH measurement mode. Display will flash Temp Cal Complete in the upper display and MTC Set Temp: (temperature that was keyed in). See Figure 34. The display will flash Sys. Updating...Please wait... The meter then returns to pH measurement mode and will now compensate pH reading with the manually set temperature.

NOTE: To exit this program without confirming the manual temperature compensation value, do not press ENTER in step 5. Press EXIT instead. The display will flash Error: Cal Aborted and meter will return to pH measurement mode.

7.179pH 25.3°C ATC

Jan 18 2002 08:46:25

Figure 29

pH/Temp mV Ion

Select & Press ENTER

Figure 30

7.179pH 25.3°C MTC

Jan 18 2002 08:46:25

Figure 31

Temperature Cal Mode

Figure 32

MTC Temp : 25.0 °C

Key In Std: 25.0 °C

Figure 33

Temp Cal Complete

MTC Set Temp: 26.5 °C

Figure 34

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Instruction Manual

pH 1100/ 2100

3.2.3Taking pH Measurements

NOTE: Be sure to remove the electrode soaker bottle or protective rubber cap on the electrode before measurement.

1.Rinse the probe with deionized or distilled water before use to remove any impurities adhering to the probe body. If the pH electrode dehydrated, soak it for 30 minutes in electrode storage solution or a 2M to 4M KCl solution.

2.Press ON. The upper display shows current pH reading and temperature, and indicates automatic or manual temperature compensation. The lower display shows month, date, year and time. See Figure 35.

3.Dip the probe into the sample. Make sure the sensor or the glass bulb of the electrode is completely immersed into the sample. Stir the probe gently to create a homogenous sample.

4.Allow time for the reading to stabilize. The pH indicator blinks when reading is not stable. See Figure 36. When the readings stabilizes, the pH indicator freezes and no longer blinks.

7.179pH 25.3°C ATC

Jan 18 2002 08:46:25

Figure 35

7.546pH 25.4°C ATC

Jan 18 2002 08:46:30

Figure 36

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Instruction Manual

pH 1100/ 2100

4 mV CALIBRATION AND MEASUREMENT

4.1mV Calibration

1.Turn the meter ON. If the meter is not in the mV measurement mode, press EXIT and use >/CAL to select mV. The mode selected will flash. See Figure 37. Press ENTER to confirm selection. The meter is now in absolute mV measurement mode. See Figure 38.

2.Rinse the electrode in deionized water or rinse solution.

Do not wipe the electrode dry. Wiping the probes causes static, and will create calibration and measurement instability.

3.Select your standard and pour into a clean container.

4.Dip the probe into the standard. The end of the probe must be completely immersed into the sample. Stir the probe gently to create a homogeneous sample.

5.Press >/CAL key to enter the mV calibration mode. The display will read Cal Mode Activated, Please wait... See

Figure 39. The meter is now in mV calibration mode. The upper display shows Abs. mV: and lower display shows

Key in Std: See Figure 40.

NOTE: In mV calibration, the value shown in the upper display is the same as the lower display.

6.Key in the mV value to match the standard value using the numeric keypad. If you make a mistake, use the ∆/MI or /MR to highlight mistake, then re-enter.

7.Press ENTER key to confirm the reading. The display flashes mV Cal Completed, mV Offset: (shows the mV offset value). See Figure 41. It then flashes Sys Updating... Please wait.... The meter returns to mV measurement mode. The upper display now reads Rel. mV. See Figure 42.

NOTE: New mV calibrations will override existing the stored mV calibration data. The meter retains stored mV calibrations even when the meter is turned off.

To exit from mV calibration mode at any point without confirming calibration, DO NOT press ENTER in step 7. Press

EXIT.

The upper display then flashes Error: Cal Aborted. See Figure 43.

pH/Temp mV Ion

Select & Press ENTER

 

 

Figure 37

 

 

 

Abs. mV

:

226.9mV

Jan 20 2002

20:30:05

Figure 38

Cal Mode Activated Please wait. . .

Figure 39

Abs. mV : 226.9mV

Key In Std: 226 . 9 mV

Figure 40

mV Cal Completed

mV Offset: -3.7 mV

Figure 41

Rel. mV : 200.0mV

Jan 20 2002 20:34:45

Figure 42

Error: Cal Aborted

Figure 43

Error :

mV Offset too large

Figure 44

4.1.1mV Calibration error message

If the offset adjustment of your mV calibration is not within ±150.0 mV; the upper display will flash Error: and the lower display will read mV Offset too large. See Figure 44. Press EXIT to clear error message and return to mV measurement mode.

18

Instruction Manual

pH 1100/ 2100

4.2mV Measurement

1.Turn the meter ON. If the meter is NOT in the mV measurement mode, press EXIT and use >/CAL to select mV. The mode selected will flash. See Figure 45. Press ENTER to confirm selection.

The meter is now in Rel mV measurement mode. See Figure 46. If you have not performed a mV calibration or have reset the meter, the display will read Abs. mV. See Figure 47.

2.Dip the electrode into the sample. The sensor or glass bulb of the electrode must be completely immersed into the sample. Stir the electrode gently to create a homogeneous sample.

pH/Temp mV Ion

Select & Press ENTER

Figure 45

Rel. mV : 200.0mV

Jan 20 2002 20:34:45

Figure 46

3.Allow time for the reading to stabilize. The upper display will show the mV reading, and the lower display will show the current month, day and time. See Figure 46.

Abs. mV

:

226.9mV

Jan 20 2002

20:30:05

Figure 47

19

Instruction Manual

pH 1100/ 2100

5 ION CALIBRATION AND MEASUREMENT (ONLY APPLICABLE FOR pH 2100)

The pH 2100 meter reads ion concentration in ppm, ppt, mg/l, g/l, mmol/l and mol/l units. See Ion setup Program P3.0 (page 43) to select ion concentration units.

5.1Ion calibration

This instrument is capable of up to 5-point custom ion calibration with a minimum of 2-point calibration. Custom calibration values can be any value between 0.001 and 19998. Once the first calibration value is keyed in, all other calibration will automatically be at least one decade apart.

For example if your first calibration point is at 0.001, all other calibration points will be at least one decade apart from 0.001 (0.001, 0.01, 0.1,1.0, 10.0, 100, 1000, 10000).

For best accuracy calibrate your meter to points with similar concentrations to the solutions you want to test.

1.Connect an Ion Selective Electrode (ISE) to the BNC input connector on the back of the meter.

2.Turn the meter ON. If the meter is not in the Ion measurement mode, press EXIT and use >/CAL to select Ion. The mode selected will flash. See Figure 48. Press ENTER to confirm selection. The meter is now in Ion measurement mode.

3.If the meter has not been calibrated or has been reset, the display will flash Ion Meas and current mV value. See Figure 49. If the meter has been calibrated previously, the display will show the current concentration value plus the absolute mV produced by the electrode.

4.Dip the electrode into the first calibration standard. Start with the calibration standard that has the lowest concentration and move up to higher concentration standards.

5.Press >/CAL to enter the ion calibration mode. The display will flash Cal Mode Activated, Please wait... See Figure 50. The display then shows Ion Conc: ppm (or unit selected in ion setup mode) in the upper display and Abs. mV: in the lower display. See Figure 51.

6.The first calibration point must be keyed in by the user. Key in the concentration value of the standard using the numeric keypad. If you make a mistake, use the ∆/MI or /MR keys to highlight mistake, then re-enter.

7.Press ENTER to confirm the first calibration point. The display will flash 1 Cal Point Done *, then the meter proceeds to the next calibration point at least 1 decade apart from the first calibration point. See Figure 52.

8.Use ∆/MI or /MR keys to move the cursor to next calibration point. All points will be a decade apart from the first calibration point.

9.Rinse off the electrode with deionized water before placing it in the next calibration standard.

10.Allow probe to stabilize in calibration standard. Press ENTER to confirm. The display flashes 2 Point Cal Done *. See

Figure 53.

The meter proceeds to the next calibration point.

pH/Temp mV Ion

Select & Press ENTER

 

 

Figure 48

 

 

 

 

Ion Meas

160.3mV

 

Jan 20 2002

21:54:34

 

 

Figure 49

 

 

 

Cal Mode Activated

 

Please wait. . .

 

 

 

Figure 50

 

 

 

 

 

Ion Conc:

 

ppm

 

Abs. mV :

100.7mV

 

 

Figure 51

 

 

 

 

Ion Conc:0.01ppm

*

 

1 Point Cal Done

 

 

Figure 52

 

 

 

 

Ion Conc:0.10ppm

*

 

2 Point Cal Done

Figure 53

20

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