Pocket Colorimeter II Instruction Manual Edition 2

Important Note This manual is intended for use with the following Pocket Colorimeter™ II instrument: Chlorine (Cl2)

Cat. No. 59530-00

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Table of Contents Safety Precautions ... 1-7 Laboratory Safety ... 1-7 Use of Hazard Information... 1-7 Precautionary Labels... 1-8 Specifications ... 1-9 Instrument Keys and Display ...1-11 Instrument Cap Cord ... 1-12

Chlorine, Free and Total, LR ... 1-15 Measuring Hints ... 1-15 Accuracy Check ... 1-27 Interferences... 1-29 Method Performance... 1-30

Chlorine, Free and Total, HR ... 1-31 Measuring Hints ... 1-31 ... 1-38 Accuracy Check ... 1-39 Interferences... 1-41

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Table of Contents, continued Method Performance ...1-42 Specê Secondary Standards for DPD Chlorine...1-43 Using the Specà Standards...1-44 Summary of Method ...1-45 Replacement Parts ...1-46 Instrument Operation ...2-3 Key Functions...2-3 Menu Selections ...2-4 Switching Ranges...2-4 Setting the Time ...2-4 Recalling Stored Measurements ...2-5 Battery Installation ...2-5 Error Codes ...2-7 Error Messages ...2-7

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Table of Contents, continued Standard Calibration Adjust ...2-11 User-Entered Calibration ... 2-13 Overview... 2-13 Calibration Procedure Using Prepared Standards ... 2-15 Entering a Predetermined Calibration Curve ... 2-18 Editing a User-entered or Factory Calibration Curve ... 2-20 Exiting the Calibration Routine... 2-22 Deleting Calibration Points ... 2-22 Retrieving the Factory Calibration... 2-23 Maximum/Minimum Displayed Value... 2-24 Certification ... 2-26 How to Order ... 2-31 Repair Service ... 2-33 Warranty ... 2-34

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Safety Precautions Please read this entire manual before unpacking, setting up, or operating this instrument. Pay particular attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment. To ensure the protection provided by this equipment is not impaired, do not use or install this equipment in any manner other than that which is specified in this manual.

Laboratory Safety As part of good laboratory practice, please familiarize yourself with the reagents used in these procedures. Read all product labels and the material safety data sheets (MSDS) before using them. It is always good practice to wear safety glasses when handling chemicals. Follow instructions carefully. Rinse thoroughly if contact occurs. If you have questions about reagents or procedures, please contact the manufacturer or distributor.

Use of Hazard Information If multiple hazards exist, this manual will use the signal word (Danger, Caution, Note) corresponding to the greatest hazard.

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Safety Precautions, continued DANGER Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury. CAUTION Indicates a potentially hazardous situation that may result in minor or moderate injury. NOTE Information that requires special emphasis.

Precautionary Labels Please pay particular attention to labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. This symbol, if noted on the instrument, references the instruction manual for operational and/or safety information.

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Specifications Lamp: Light emitting diode (LED) Detector: Silicon photodiode Photometric precision: ± 0.0015 Abs Filter bandwidth: 15 nm Wavelength: 528 nm Absorbance range: 0–2.5 Abs Dimensions: 3.2 x 6.1 x 15.2 cm (1.25 x 2.4 x 6 inches) Weight: 0.2 kg (0.43 lbs) Sample cells: 1 cm (10 mL), 25 mm (10 mL) Operating conditions: 0 to 50 °C (32 to 122 °F); 0 to 90% relative humidity (noncondensing) Power supply: Four AAA alkaline batteries; approximate life is 2000 tests*

* Backlight usage will decrease battery life.

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Instrument Keys and Display Item

Description

1

POWER/BACKLIGHT Key

2

ZERO/SCROLL Key

3

MENU Key

4

Numeric Display

5

Range Indicator

6

Range Indicator

7

Menu Indicator

8

Calibration Adjusted Indicator

9

Battery Low Indicator

10

READ/ENTER Key

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Instrument Cap Cord The instrument cap for the Pocket Colorimeter™ II doubles as a light shield. Accurate measurements cannot be obtained unless the sample or blank is covered with the cap. Use the instrument cap cord to secure the cap to the body of the colorimeter and prevent loss of the cap. See Figure 1 on page 1-13. 1. Loop the instrument cap cord through the ring on the cap. 2. Remove the battery compartment cover. Press the knotted end of the cord into the hole indicated by the arrow. 3. Slide the cord into the slot on the battery compartment cover. Snap the cover into place.

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Instrument Cap Cord, continued Figure 1

Attaching the Instrument Cap Cord

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Chlorine, Free and Total, LR (0.02 to 2.00 mg/L Cl2) Method 8021 (Free) For water, treated water, estuary water, and sea water

Method 8167 (Total) For water, treated water, wastewater, estuary water, and sea water

DPD Method* USEPA accepted for reporting drinking water analyses** (free and total chlorine) and wastewater analyses** (total chlorine only)

Measuring Hints •

Analyze samples immediately. Do not use plastic containers to collect samples.

•

For best results, dedicate a set of cells to each free chlorine and total chlorine test.

Note: The Pocket Colorimeter II is designed to measure solutions contained in sample cells. DO NOT dip the meter in the sample or pour the sample directly into the cell holder.

* Adapted from Standard Methods for the Examination of Water and Wastewater. ** Procedure is equivalent to USEPA method 330.5 for wastewater and Standard Method 4500-Cl G for drinking water.

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Chlorine, Free and Total, LR, continued Using Powder Pillows (USEPA accepted for reporting)

1. Fill a 10-mL cell with sample (the blank). Cap. Note: Samples must be analyzed immediately and cannot be preserved for later analysis.

2. Press the POWER key to turn the meter on. The arrow should indicate the low range channel (LR). Note: See page 2-4 for

information on selecting the correct range channel.

3. Remove the meter cap. Place the blank in the cell holder with the diamond mark facing the keypad. Fit the meter cap over the cell compartment to cover the cell. Note: Wipe excess liquid and finger prints off sample cells.

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Chlorine, Free and Total, LR, continued

4. Press ZERO/SCROLL. The display will show “- - - -” then “0.00”. Remove the blank from the cell holder.

5. Fill a second 10-mL cell to the 10-mL line with sample. Note: Do not use the same sample cells for free and total chlorine analysis without thoroughly rinsing the cells with sample between free and total tests.

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6. Add the contents of one DPD Free Chlorine Powder Pillow or one DPD Total Chlorine Powder Pillow to the sample cell (the prepared sample). Note: SwifTest™ Dispensers for Free or Total Chlorine can be used in place of powder pillows. See Using the SwifTest™ Dispenser (USEPA accepted for reporting) on page 1-23.

Chlorine, Free and Total, LR, continued

7. Cap and shake gently for 20 seconds. Note: Shaking dissipates bubbles that may form in samples with dissolved gases. Note: A pink color will develop if chlorine is present.

8. For free chlorine, place the prepared sample cell in the cell holder. Cover with the instrument cap and proceed to step 10 within one minute after adding the DPD Free Pillow. Note: Accuracy is not affected by undissolved powder. Note: Wipe off sample cells.

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9. For total chlorine, place the prepared sample in the cell holder and cover the cell with the instrument cap. Wait three to six minutes after adding the DPD Total Pillow. Proceed to step 10.

Chlorine, Free and Total, LR, continued

10. Press READ/ENTER. The instrument will show “- - - -” followed by the results in mg/L chlorine.

Note: If the sample temporarily turns yellow after reagent addition, or if the display shows overrange (page 2-10) dilute a fresh sample and repeat the test. A slight loss of chlorine may occur because of the dilution. Multiply the result by the appropriate dilution factor.

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Chlorine, Free and Total, LR, continued Using AccuVac® Ampuls (USEPA accepted for reporting)

1. Fill a 10-mL sample cell with sample (the blank). Cap. Collect at least 40 mL of sample in a 50-mL beaker. Note: Empty AccuVac Ampuls are available for use as blanks. See OPTIONAL REAGENTS on page 1-43.

2. Press the POWER key to turn on the meter. The arrow in the display should indicate the low range channel (LR). See page 2-4 for information on selecting the correct range channel.

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3. Remove the instrument cap. Place the blank in the cell holder, with the diamond mark facing the keypad. Cover the cell with the instrument cap. Note: Wipe liquid and finger prints off sample cells.

Chlorine, Free and Total, LR, continued

4. Press ZERO/SCROLL. The display will show “- - - -” then “0.00”. Remove the blank.

5. Fill a DPD Free Chlorine Reagent AccuVac® Ampul or a DPD Total Chlorine Reagent AccuVac Ampul with sample. Note: Keep the tip immersed

6. Quickly invert the ampule several times to mix. Wipe off any liquid or fingerprints. Note: A pink color will form

until the ampule fills completely.

affected by undissolved powder.

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if chlorine is present. Note: Accuracy is not

Chlorine, Free and Total, LR, continued

7. For free chlorine, place the prepared sample in the cell holder. Cover the ampule with the instrument cap and proceed to step 9 within one minute after filling the AccuVac Ampul. Note: Wipe liquid off the

8. For total chlorine, insert the ampule into the cell holder, then cover with the instrument cap. Wait three to six minutes after filling the AccuVac Ampul. Proceed to step 9. Note: Wipe liquid off the

AccuVac Ampul.

AccuVac Ampul.

9. Press READ/ENTER. The instrument will show - - - - followed by the results in mg/L chlorine.

Note: If the sample temporarily turns yellow after reagent addition, or if the display shows

overrange (page 2-10) dilute a fresh sample and repeat the test. A slight loss of chlorine may occur because of the dilution. Multiply the result by the appropriate dilution factor.

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Chlorine, Free and Total, LR, continued Using the SwifTest™ Dispenser (USEPA accepted for reporting)

1. Fill a 10-mL cell with sample (the blank). Cap. Note: Samples must be analyzed immediately and cannot be preserved for later analysis.

2. Press the POWER key to turn the meter on. The arrow should indicate the low range channel (LR). Note: See page 2-4 for

information on selecting the correct range channel.

3. Remove the meter cap. Place the blank in the cell holder with the diamond mark facing the keypad. Fit the meter cap over the cell compartment to cover the cell. Note: Wipe excess liquid and finger prints off sample cells.

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