Micro 7+
Revision 02/25/14
486691-K Standard Kit
Advanced Photometer System
IDEAL FOR DRINKING WATER, POOLS AND SPAS,
ENVIRONMENTAL, & EDUCATIONAL TESTING
USEPA, DIN, & ISO Compliant for Free & Total Chlorine Testing
(4500-CL G, DIN Standard 38 408 G4, ISO 7393/2)
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Index:
Parameter
Free Chlorine (DPD-1)
Permanganate (DPD-1)
Combined Chlorine (DPD-3)
Ozone (DPD-4)
Total Chlorine (DPD-4)
pH
Bromine (DPD-1)
Total Alkalinity (as CaCO3)
Total Hardness (as CaCO3)
Copper (as Cu+2)
Total Iron (as Fe)
High Range Chlorine
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About Your Photometer
Tips for Best Accuracy
Battery Installation
Warranty (2 year)
Reorder Information
USEPA Compliance
Kit Components
Page
4
4
5
6
6
6
7
7
8
8
9
9
3
10
11
11
12
3, 12
12
MENU
CL1
CL1
CL1
CL1
CL1
PH2
BR3
AL4
TH5
CU6
FE7
HR8
Visit us online at sensafe.com/micro7+ for up-to-date
product information and to register your warranty.
Manufactured By: Industrial Test Systems, Inc.
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Phone: 1-800-861-9712 - INSIDE THE U.S.
1-803-329-9712 - OUTSIDE THE U.S.
Fax: 1-803-329-9743
ITS@SENSAFE.COM
WWW.SENSAFE.COM
www.poolcheckonline.com
The eXact® Micro 7+ Advanced
Photometer System is designed for
use with the eXact® Strip Micro
reagent delivery system.
eXact® Micro 7+ is Manufactured and
tested in an ISO 9001 Facility
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eXact® Micro 7+ Photometer
ITEM PICTURED
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COMPONENT
NAME
Mixing Cap/Cell Cover
Cell (Built-in Plastic, 4mL)
LCD Display
READ Button
MENU Button
ZERO/ON Button
Battery Cover with loop for lanyard
AAA Batteries (x4) (Not Included)
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(Used for
testing
outdoors)
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Measurement Method:
Light Source:
Wavelength:
Automatic Range Selection:
Display:
CELL Pathlength:
Cell Chamber:
Custom-molded, proprietary, PET plastic
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Sample Required:
4mL (0.13 oz)
Operating Temperature Range: 0 - 50°C (32° - 122°F)
Power Supply:
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Battery Life:
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Electromagnetic Compliance: (PLWWHG,QWHUIHUHQFH(1
(EMC)
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Waterproof Rating:
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Weight:
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Dimensions: ,QVWUXPHQW:['[+FP
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Photometric
Light Emitting Diode (LED)
525 nm
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3-digit customized liquid crystal display
with annunciators
20mm
We offer a “Green” Alternative
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1
2
About Your eXact® Micro 7+ Instrument
In order to save power, the meter is designed to turn off after 3 minutes (timed from the last button pressed).
Should the meter turn off in the middle of a test, the last stored zero in the meter will remain valid when the
meter is turned on again. Also, the test result is stored in memory for easy retrieval.
The eXact® Micro 7+ meter is controlled by three buttons:
1. ZERO/ON:KHQ¿UVWSUHVVHGWKLVEXWWRQWXUQVWKHPHWHURQ:KHQWKHPHWHULVRQDQGWKLVEXWWRQLV
pressed, it zeroes the sample in the cell. Once the meter is zeroed, this zero value applies to all parameters
and is stored and retained even when meter turns off. However, it is recommended that each new water
sample analyzed is zeroed before testing, to maximize sensitivity and accuracy.
2. MENU: With each press, the MENU button advances through the tests in the following sequence: CL1,
PH2, BR3, AL4, TH5, CU6, FE7, HR8. Each test menu can store up to 20 results. To retrieve the stored
results, go to the desired test using the MENU key. When the desired test is displayed, press and hold
down the MENU key. Continue holding down the MENU key to scroll the stored results for that test, starting
with the most recent result. The meter will display, from memory, the last 20 readings in sequence beginning
with -20, which is the latest result, followed by -19, which is the 2ndODWHVWUHVXOWHWFDQG¿QDOO\ZKLFKLV
the oldest result retained. Only the last 20 readings are stored in each menu. This meter is able to store 160
results in memory (20 in each menu).
3. READ: When pressed once, this button starts the timer for the parameter being tested. When pressed a
second time the meter exits the timer and immediately prepares to colorimetrically measure the sample, and
simultaneously stores the measurement in memory.
If the parameter being measured is below or above the detection range, the display will show “LO” (Under
Range) or “HI´2YHU5DQJHUHVSHFWLYHO\7KLVIHDWXUHLVPHQXVSHFL¿FDQGGRHVQRWDSSO\WRDOOSDUDPHWHUV
About The Accuracy / Calibration Of The Micro 7+ System
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Micro 7+ Systems against the AWWA, US EPA , DIN, and ISO reference test methods for chlorine.
Studies show that the eXact® Micro 7+ System repeatedly agrees with an EPA Compliant reference
method greater than 99% (R2= 0.9989, 0 - 6.0 ppm - see page 12). The eXact® Micro 7+ Advanced
3KRWRPHWULF6\VWHPKDVEHHQIDFWRU\FDOLEUDWHGIRU\RXUFRQYHQLHQFH<RXFDQH[SHFWWKH¿[HG
calibrations in the meter to be valid for the life of the meter because of the quality, Long-Life LED, the
photo cell, and the software as written into the meter. This is why the meter comes with a 2-Year
Warranty. NOTE: Test algorithms in this meter give accurate results in fresh and salt water (except
Nitrate).
Compliance VHULÀFDWLRQIRU)UHHDQG7RWDO&KORULQH7HVWLQJ
This DPD test system is accepted by most health departments because this test is USEPA (DIN
Standard 38 408 G4, ISO 7393/2) accepted for testing requirements for Free and Total Chlorine. The
Micro 7+ meter uses a wavelength of 525nm; and the compliance requirement is that the colorimeter
wavelength is between 490 and 530nm. The eXact® Strip Micro CL (DPD-1) uses the same reagents
and proportions, and the resulting solution pH is maintained between 6.2 and 6.5 as VSHFL¿HGby
AWWA (American Water Works Association) method 4500-Cl G. It should be understood that the
USEPA does not "approve" commercial DPD delivery systems such as reagent powder pillows, tablets,
dispensers, or eXact® Strip DPD delivery devices. The eXact® Strip Micro CL (DPD-1) for Free
Chlorine, and the eXact® Strip Micro CL (DPD-3) or the eXact® Strip Micro CL (DPD-4) for Total
Chlorine meet your reportable testing requirements because the eXact® Strip Micro CL delivers the
same chemicals in identical proportions (see table below); therefore, the system is compliant. Likewise,
AWWA proportions are followed as required for Total Chlorine measurements using Potassium Iodide.
Component
(Free Chlorine)
Anhydrous DPD sulfate
Anhydrous Na2HPO4
Anhydrous KH2PO4Na2
EDTA
3
AWWA
4500-Cl G
eXact®
DPD-1
1.5%
33.4%
64.0%
1.1%
1.5%
33.4%
64.0%
1.1%
CL1
1
DPD-1 Free Chlorine Test Procedure
1
Remove one (1) eXact Strip Micro CL (DPD-1),
Part No. 486637 from the bottle before beginning
the test. Set the strip in a dry, convenient place and
recap the bottle immediately.
TURN METER ON
3
SELECT TEST: CL1
Press the ZERO/ON button to power the meter on;
the display will show all annunciators, then the
current MENU selection, followed by the last reading.
Press and re-press the MENU button until the
display shows the parameter CL1.
CL1 is also used for testing:
Total Chlorine (DPD-4), Ozone (DPD-4), Permanganate (DPD-1), and
Total Chlorine (DPD-3). (Contact ITS for specs and details if you are
planning on using CL1 for Permanganate or Ozone measurements)
2b
4
3
5
6
5
7
6
CL
®
2
2a
4
REMOVE STRIP
RINSE AND FILL CELL WITH SAMPLE
Rinse the CELL at least 3 times with the water sample
you will be testing - rinsing minimizes the potential for
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cell to capacity (4ml) with the water sample.
ZERO METER
Press the ZERO/ON button. The cursor will move
across the display followed by 0.00 PPM. Sample is
ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro CL (DPD-1), Part No.
486637 into the CELL and immediately press READ.
This starts the 20 SECOND countdown timer. During
this time move the strip in a gentle back and forth
motion. Remove and discard the strip after “1” on
the display disappears.
RECORD RESULT DISPLAYED
The cursor will move across the display while the
meter prepares to measure the sample. Record result
displayed (this result is automatically stored in CL1).
DO NOT discard the sample from the Free Chlorine
test if you are planning to run eXact® Strip Micro DPD-3
(Combined Chlorine) Procedure. Move directly to steps
8-10 on page 5. Otherwise, rinse the cell immediately.
NOTE: Chlorine reacts with N,N-diethyl-p-phenylenediamine as it is released from the strip to form a magenta color,
directly proportional to the Chlorine concentration.
4
CL
DPD-3 Combined Chlorine Test Procedure
CL1
This procedure is only valid when run as a continuation of the
eXact® Strip Micro CL (DPD-1 Free Chlorine) Test Procedure
located on the previous page.
8
9
10
REMOVE STRIP
Remove one (1) eXact® Strip Micro CL (DPD-3), Part No. 486638 from the bottle before
beginning the test. Set the strip in a dry, convenient place and recap the bottle immediately.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro CL (DPD-3) into the CELL and immediately press READ. This
starts the 20 SECOND countdown timer. During this time move the strip in a gentle back
and forth motion. Remove and discard the strip when “1” on the display disappears. The
cursor will move across the display while the meter prepares to measure the sample. This
result is automatically stored in CL1 (NOTE: The Iodide added with DPD-3 will, in the presence
of Combined Chlorine or Chloramines, convert into Iodine).
PRESS READ AGAIN
Press READ again and the meter will count down and display the next reading. If this
reading matches the previous result, then record this as the Total Chlorine result. This value
is automatically stored in CL1. After testing is completed, rinse cell immediately. Record the
Total Chlorine as the highest value the meter displayed.
*NOTE: Standard Method (4500-Cl G, procedure for total chlorine) requires the reading to
be made after 2 minutes from the time the KI is added. For compliance testing, you must
time the two minutes and then make your measurement. NOTE: From testing in our lab,
water samples above 70°F (20°C), generally, reach a stabilized reading quicker then 2 minutes.
CL1: Chlorine and Iodine react with N,N-diethyl-p-phenylenediamine as it is released from the strip to
form a magenta color, directly proportional to the Chlorine concentration. Ozone, Bromine, and
Permanganate, and Chlorine Dioxide also form this color.
eXact® Strip Micro CL (DPD-1/DPD-3/DPD-4) Interferences (part nos. 486637/486638/486670)
Interfering Levels & Treatments
If sample has acidity above 150mg/L CaCO3 test may not develop
full color. Neutralize to pH 6.0 to 7.0 with 0.5N Sodium hydroxide.
If sample has alkalinity above 200mg/L CaCO3 test may not develop
Alkalinity
full color. Neutralize to pH 6.0 to 7.0 with 0.5N Sulfuric acid.
Color similar to free chlorine reaction at all levels.
Bromine & Bromamines, Br2
Color similar to free chlorine reaction at all levels.
Chlorine Dioxide, ClO2
Color development is reduced above 10 ppm (mg/L).
Copper, Cu+2
Color similar to free chlorine reaction at all levels.
Iodine, I2
Manganese, oxidized (Mn+4, Mn+7) See AWWA procedure 4500-CL F, 1(d) for removal of interferences.
or Chromium, oxidized (Cr+6)
Monochloramine interferences are known to occur in free chlorine
Monochloramines (NH2Cl)
DPD methods. This interference is dependent on temperature and
(applies to DPD-1 only)
monochloramine concentration.
Color similar to free chlorine reaction at all levels.
Ozone, O3
Interference is possible.
Peroxides
Typical pH samples of potable water with a pH of 6.0 to 9.0 are
pH
OK. If outside this range adjust to pH 6.0 to 7.0 using acid
(0.5N Sulfuric acid) or base (0.5N Sodium hydroxide).
Interfering Substance
Acidity
5
DPD-4 (Total Chlorine or Ozone) Test Procedure
CL1
1
REMOVE STRIP
Remove one (1) eXact® Strip Micro CL (DPD-4 for Total Chlorine or Ozone), Part No.
486670 from the bottle before beginning the test. Set the strip in a dry, convenient place and
recap the bottle immediately.
2
TURN METER ON
3
SELECT TEST: CL1
4
FILL METER WITH SAMPLE
5
6
7
Press the ZERO/ON button to power the meter on; the display will show all annunciators,
then the current MENU selection, followed by the last reading.
Press and re-press the MENU button until the display shows the parameter CL1.
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing
PLQLPL]HVWKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWR
capacity (4ml) with the water sample.
ZERO METER*
Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
Sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro CL (DPD-4), Part No. 486670 into the CELL and immediately press READ.
This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth
motion. Remove and discard the strip after “1” on the display disappears*. The cursor will move across
the display while the meter prepares to measure the sample. Record result displayed (this result is
automatically stored in CL1).
PRESS READ AGAIN
Press READ again and the meter will count down and display the next Total Chlorine result. If this
reading matches the previous result, then record this as Total Chlorine value (this result is stored
in CL1). After testing is completed, rinse cell immediately. Record the Total Chlorine as the highest
value the meter displayed.
NOTE: Standard Method (4500-Cl G, procedure for total chlorine) requires the reading to
be made after 2 minutes. 2 minute wait is not necessary for Ozone measurements.
PH2
1
pH Test Procedure
REMOVE STRIP
TURN METER ON
3
SELECT TEST: PH2
5
6
PH
Remove one (1) eXact® Strip Micro PH, Part No. 486639 from the bottle before
beginning the test. Set the strip in a dry, convenient place and recap the bottle immediately.
2
4
CL
Press the ZERO/ON button to power the meter on; the display will show all annunciators,
then the current MENU selection, followed by the last reading.
Press and re-press the MENU button until the display shows the parameter PH2.
FILL METER WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWK
the water sample.
ZERO METER*
Press the ZERO/ON button. When the display shows 0.0 PH, the sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro PH, Part No. 486639 into the CELL and immediately press READ. This
starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth
motion (approx. 2 strokes/sec). Remove and discard the strip after “1” on the display
disappears*. The cursor will move across the display while the meter prepares to measure the
sample. Record result displayed (this result is automatically stored in PH2). After testing, rinse cell
immediately. NOTE: For best results, Total Alkalinity of the sample should be 40-140 ppm.
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
6
Bromine DPD-1 Test Procedure
1
REMOVE STRIP
Remove one (1) eXact® Strip Micro CL (DPD-1), Part No. 486637 from the bottle before
beginning the test. Set the strip in a dry, convenient place and recap the bottle immediately.
2
TURN METER ON
3
SELECT TEST: bR3
4
FILL METER WITH SAMPLE
5
6
Press the ZERO/ON button to power the meter on; the display will show all annunciators, then
the current MENU selection, followed by the last reading.
Press and re-press the MENU button until the display shows the parameter bR3.
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWK
the water sample.
ZERO METER*
Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro CL (DPD-1), Part No. 486637 into the CELL and immediately press
READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle
back and forth motion (approx. 2 strokes/sec). Remove and discard the strip after “1” on the
display disappears*. The cursor will move across the display while the meter prepares to
measure the sample. Record result displayed (this result is stored in bR3 memory). After
testing is completed, rinse cell immediately.
AL
1
2
3
4
5
6
bR3
Total Alkalinity Test Procedure
AL4
REMOVE STRIP
Remove one (1) eXact® Strip Micro AL, Part No. 486641 from the bottle before
beginning the test. Set the strip in a dry, convenient place and recap the bottle immediately.
TURN METER ON
Press the ZERO/ON button to power the meter on; the display will show all annunciators, then
the current MENU selection, followed by the last reading.
SELECT TEST: AL4
Press and re-press the MENUEXWWRQXQWLOWKHGLVSOD\VKRZVWKHSDUDPHWHU$/
FILL METER WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWK
the water sample.
ZERO METER*
Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro AL, Part No. 486641 into the CELL and immediately press READ. This starts
the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion
(approx. 2 strokes/sec). Remove and discard the strip after “1” on the display disappears*.
NOTE: For water temperatures above 95°F/35°C (hot tubs), remove and discard the strip when the timer
displays “10”, countdown continues. For the hot water samples, a 10-second dip time is best. The cursor
will move across the display while the meter prepares to measure the sample. Record result displayed
WKLVUHVXOWLVDXWRPDWLFDOO\VWRUHGLQ$/$IWHUWHVWLQJLVFRPSOHWHGULQVHFHOOLPPHGLDWHO\
NOTE: Total Alkalinity reacts with the Alizarin Red S and citric acid as it is released from the strip to form a red color, directly proportional to
the alkalinity present in the sample.
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
7
TH5
1
Total Hardness Test Procedure
REMOVE STRIP
Remove one (1) eXact® Strip Micro TH, Part No. 486673 from the bottle before
beginning the test. Set the strip in a dry, convenient place and recap the bottle immediately.
2
TURN METER ON
3
SELECT TEST: TH5
4
FILL METER WITH SAMPLE
5
6
TH
Press the ZERO/ON button to power the meter on; the display will show all annunciators,
then the current MENU selection, followed by the last reading.
Press and re-press the MENU button until the display shows the parameter TH5.
Rinse the CELL 2 or 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\PO
with the water sample.
ZERO METER
Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro TH, Part No. 486673 into the CELL and immediately press READ.
This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back
and forth motion. Remove and discard the strip after “1” on the display disappears. The cursor
will move across the display while the meter prepares to measure the sample. Record result
displayed (this result is automatically stored in TH5). After testing is completed, rinse cell
immediately.
INTERFERENCES: Positive interferences are observed if the test sample contains Barium. Interferences also observed if the test
sample contains Copper, Lead, Cobalt or Nickel.
NOTE: The Calcium and Magnesium ions react with Phthalein purple to form a purple color depending on the concentration.
CU6
1
Copper Test Procedure
REMOVE STRIP
Remove one (1) eXact® Strip Micro CU, Part No. 486632 from the bottle before
beginning the test. Set the strip in a dry, convenient place and recap the bottle immediately.
2
TURN METER ON
3
SELECT TEST: CU6
4
5
6
CU
Press the ZERO/ON button to power the meter on; the display will show all annunciators,
then the current MENU selection, followed by the last reading.
Press and re-press the MENU button until the display shows the parameter CU6.
FILL METER WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing
PLQLPL]HVWKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWR
FDSDFLW\POZLWKWKHZDWHUVDPSOH
ZERO METER*
Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro CU, Part No. 486632 into the CELL and immediately press READ.
This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back
and forth motion. Remove and discard the strip after “1” on the display disappears*. The
display will immediately start counting up from 1 to 20 (this extra time allows more thorough color
development). At 20 sec, the cursor will move across the display while the meter prepares to
measure the sample. Record result displayed (this result is automatically stored in CU6). After
testing is completed, rinse cell immediately.
NOTE: Copper reacts with Biquinoline or Bicinchoninic Acid as it is released from the strip to form a purple color, directly
proportional to the copper concentration.
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
8
FE
Total Iron, TPTZ (Fe+2/Fe+3) Test Procedure
7RWDO,URQ.LW5HGXFHUDQG6WULSV
1
TURN METER ON
2
SELECT TEST: FE7
3
FILL METER WITH SAMPLE
4
5
6
FE7
Press the ZERO/ON button to power the meter on; the display will show all annunciators,
then the current MENU selection, followed by the last reading.
Press and re-press the MENU button until the display shows the parameter FE7.
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LOOFHOOWRFDSDFLW\POZLWKWKH
water sample. NOTE: For accurate results (<0.3 ppm) it is recommended to rinse the CELL
with diluted HCl (diluted Muriatic acid) or White Distilled Vinegar solution.
ADD REAGENT, CAP, AND MIX
Tilt meter to discard about 0.2 mL water in order to leave room for powder reagent. Add the contents
of one eXact® Reagent EZ Open REDUCER, Part No. 486601 to the CELL and cap meter cell with
mixing cap. Press READ to start the 20 SECOND countdown timer, place thumb over cap to keep
cap securely in place, and mix the sample by turning the meter upside-down repetitively. When
time displays 1KROGWKHPHWHUXSULJKWDQGWKHFXUVRUZLOOÀDVKDQGWKHPHWHUZLOOEHJLQWRFRXQW
XSWRVHFRQGV$IWHUWKHVHFRQGVDUHVXOWZLOOEHGLVSOD\HGLJQRUHWKLVUHVXOW
ZERO METER
Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
Sample is ready for testing.
DIP STRIP AND PRESS “READ”
Dip the eXact® Strip Micro FE (TPTZ), Part No. 486631 into the CELL and immediately press READ.
This starts the 20 SECOND countdown timer. During this time, move the strip in a gentle back and
forth motion. Remove and discard the strip after “1” on the display disappears. The meter will
DXWRPDWLFDOO\FRXQWXSIRUVHFRQGVThe cursor will move across the display, informing you that it is
about to measure the sample. Record result displayed (this result is automatically stored in FE7).
NOTE: Reducer will reduce Iron and the Iron will react with TPTZ to form a blue color.
HR
1
2
3
4
5
6
High Range Chlorine Test Procedure
HR8
REMOVE STRIP
Remove one (1) eXact® Strip Micro HR, Part No. 486672 from the bottle before beginning the test. Set
the strip in a dry, convenient place and recap the bottle immediately.
TURN METER ON
Press the ZERO/ON button to power the meter on; the display will show all annunciators, then the current
MENU selection, followed by the last reading.
SELECT TEST: HR8
Press and re-press the MENU button until the display shows the parameter HR8.
FILL METER WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes the potential
IRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWKWKHZDWHUVDPSOH
ZERO METER*
Press the ZERO/ON button. The cursor will move across the display, followed by 0.0 PPM. The sample is
ready for testing.
DIP STRIP -
(read carefully and follow procedure closely)
Dip the eXact® Strip Micro HR, Part No. 486672 into the CELL and immediately press READ. This starts the 20
SECOND countdown timer. During this time move the strip in a gentle back and forth motion. Remove and
discard the strip after “1” on the display disappears*. The display will immediately start counting up from
1 to 120 (this extra time allows more thorough color development). At 120 sec, the cursor will move across
the display while the meter prepares to measure the sample. Record result displayed (this result is
automatically stored in HR8). After testing is completed, rinse cell immediately with brush and water.
*Note: Use a 10 second dip time if water temperature is above 113°F / 40°C.
INTERFERENCES: Oxidizers such as Chloramine, Chlorine Dioxide, Bromine, Iodine, Ozone, Bromamines, and Permanganate
will give false positive readings.
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
9
eXact® Micro 7+ Tips For Best Accuracy
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Become familiar with the meter and the different tests by reading the instructions carefully.
The Free Chlorine, Combined Chlorine, and Total Chlorine reagents are compliant for meeting
USEPA (4500-Cl G); ISO 7393/2; and German DIN 38408 G4-2 requirements.
Observe the dip time (as required for the test) for accurate results.
7HVWLPPHGLDWHO\DIWHU¿OOLQJWKHCELL with water sample when testing for oxidizers such as
Chlorine and Bromine (Ozone can be measured in CL3 MENU).
Be sure the CELL LV¿OOHGWRFDSDFLW\POXQOHVVPHQWLRQHGLQWKHSURFHGXUH
Rinse the CELL with clean water immediately after completing each test. Some reagents may
stain the CELL if not rinsed shortly after use. It is recommended, after these tests, to use the Cell
Cleaning Brush with water to clean the CELL.
Just before testing, rinse the sample CELL with the sample water several times to get a
representative sample. (Use deionized or distilled water for rinsing if you have a limited amount of
sample).
Store the meter and all test materials out of direct sunlight and away from chemical storage areas.
Minimize exposure of meter and test reagents to heat above 38°C (100°F).
Dry the outside of the meter when testing is complete or before storage of the meter.
When running a DPD-1 Free Chlorine test AFTER a Total Chlorine DPD-3, a Total Chlorine
DPD-4, or a HR Chlorine test, rinsing is very important to remove residual KI, which may interfere.
Each eXact® Strip Micro is valid for ONLY one test. Discard strip after single use in regular refuse
that is inaccessible to children and pets.
Each bottle of eXact® Strip Micro contains the quantity of strips notated on the bottle. Due to the
VWULSVOLWWLQJSURFHVV\RXPD\¿QGRQHRUWZRVWULSVWKDWDUHQRWLFHDEO\VPDOOHURUODUJHULQZLGWK
than the normal strips in the bottle. These should be discarded. Using these strips may give
unreliable results.
Each table supplied has a unique revision number located in the bottom right corner of the table. It
is recommended that you visit www.sensafe.com at least every 6 months to check for any updated
revisions.
The eXact® Micro 7+ Meter is not compatible for use with DPD-1, DPD-3, and DPD-4 powder
pillows, tablets, and liquids available from other manufacturers. Accurate results can only be
guaranteed by using genuine eXact® Micro strips or reagents (reorder information on page 19).
Our lab testing with the Micro 7+ meter has shown that zeroing and measuring of the sample
normally does not require any cell cover for accurate results, except in sunlight. To obtain optimal
accuracy when testing with the meter outdoors (sunlight), use the Mixing Cap/Cell Cover when
zeroing and reading the sample.
Remove batteries when meter is not used for more than a month (Warranty Requirement).
It is recommended that Pool and Spa samples for oxidizers (such as Chlorine) be taken 18 inches
below the surface as follows: submerge meter with open cell facing down 18 inches, and then turn
PHWHUXSULJKWDWWKDWGHSWKWR¿OOWKHFHOO5HPRYHPHWHUIURPZDWHUZLWKWKHVDPSOHIRUWHVWLQJ
When there is a question about the quality of a ReagentStrip™, your test method, or the
photometer you are using, then it is recommended to test the SYSTEM (reagent, you, and
photometer) by using the appropriate READY SNAP™ solution.
Follow the procedure for the test you are running. If you get the acceptible result using the READY
SNAP™VROXWLRQWKHQ\RXFDQEHFRQ¿GHQWWKDWWKHUHDJHQW\RXDQGWKHSKRWRPHWHUDUHZRUNLQJ
as a SYSTEM correctly.
™
Assigned Value for READY SNAP 3 (lot 505) Solution
Parameter
Free Chlorine
Desired Acceptable
Value
Value
(ppm)
(ppm)
1.52
1.46 - 1.59
56;,!=HS\LZYLÅLJ[J\YYLU[JVUJLU[YH[PVUZHZ
MV\UKH[[PTLVMTHU\MHJ[\YLHUKTH`JOHUNL
^P[OJVUZLJ\[P]LSV[Z
10
R020713
eXact® Micro 7+ Meter Messages
The following are some common messages that may be displayed, including error messages.
LCD Message Description
HI
In READ mode: test sample concentration is above
WKHPHDVXUHPHQWUDQJHWHVWVSHFL¿F
LO
In READ mode: test sample concentration is below
WKHPHDVXUHPHQWUDQJHWHVWVSHFL¿F
LO
In ZERO mode: sample absorbance (due to a
cloudy or colored sample or a dirty cell) is too high
to zero, the meter will read “LO”.
ER
([FHVVLYHVWUD\OLJKWGHWHFWHG1RUPDOO\WKLV
does not occur, even when testing in sunlight.
TR9
&/
Low battery indication.
Quality control of meter used by ITS.
Clear memory. Contact ITS for more info.
Corrective Action
Dilute and retest.
Sample value is below measurement
range.
'LOXWHVDPSOH¿OWHUVDPSOHRUFOHDQFHOO2QHRI
these options should remedy the problem.
Place the LIGHT BLOCKING CAP over the CELL
for zeroing and for reading result. Moving
WRDVKDGHGDUHDFDQDOVR¿[WKLVSUREOHP
Replace the batteries.
Unscrew and rescrew battery cover to reset.
Unscrew and rescrew battery cover to reset.
About The Built-In Cell
The built-in CELLLVWUDQVSDUHQWSODVWLFDQGZKHQ¿OOHGWRWKHWRSFRQWDLQVPO7KHVWXUG\CELL design
will last for over 20,000 readings. Scratches on the CELL will not interfere or compromise the accuracy of
WKHUHDGLQJVEHFDXVHRILWV¿[HGSRVLWLRQ)RUEHVWDFFXUDF\ULQVHFHOOZLWKFOHDQZDWHULPPHGLDWHO\DIWHU
a test is completed. Do not use solvents, such as acetone, to clean the cell. When the CELL becomes
stained or cloudy from repeated testing, or when the meter does not blank when you press the ZERO/ON
button, the cell needs to be cleaned. Clean as follows)LOOFHOOZLWKFOHDQZDWHUDQGPRYHWKHCell
cleaning brush up-and-down and back-and-forth along the walls of the cell. Afterwards, rinse the cell and
the meter is ready for use again. Cleaning the cell regularly is especially recommended after you run a
test that is using turbidity or precipitation chemistry for analysis (Calcium Hardness and Cyanuric Acid).
To Install/Replace “AAA” Batteries:
1. Unscrew the O-ring sealed battery cover counter-clockwise. Use proper sized pliers if necessary.
Do not disturb the sealing O-ring. Batteries are not included.
5HPRYHWKHXVHGEDWWHULHVDQGLQVWDOOQHZ$$$EDWWHULHVIROORZLQJWKHGLDJUDPIRU
correct polarity (see diagram). We recommend high quality AAA alkaline batteries be used.
5HSODFHWKHEDWWHU\FRYHU%HVXUHWRWLJKWHQWKHFRYHUVHFXUHO\GRQRWRYHUWLJKWHQ7KLVLV
necessary for meter to be waterproof.
'LVSRVHRIWKHXVHGEDWWHULHVLQDFFRUGDQFHZLWK\RXU
local regulations.
3UHVV=(5221EXWWRQWRFRQ¿UPWKHPHWHUWXUQVRQ
The meter is now ready for operation.
7. Meter will not work if battery orientation is incorrect.
TOP VIEW
eXact® Photometer 2-Year Limited Warranty
Registration of your eXact® photometer must be received within 30 days from date of purchase to
activate the warranty. The eXact® photometer is warranted to be free from defects in materials and
workmanship for a period of two (2) years from the date of purchase by the customer. ITS will repair or
replace any part of the product which is deemed to be faulty or otherwise defective. The non-transferable
warranty does not cover product damage caused by abuse (such as crushing a tablet in the cell) or
LPSURSHUXVH,IWKHPHWHULVIDXOW\RURWKHUZLVHGHIHFWLYHFRQWDFW,76E\SKRQH([W
or email (its@sensafe.com) to describe the problem and obtain a return authorization form before
returning the photometer to ITS. Damage caused by improper packing of the photometer for return
shipment to ITS will not be covered by the warranty. Customer is responsible for shipping charges to
,76KRZHYHU,76SD\VUHWXUQSRVWDJH$PD[LPXPSURFHVVLQJIHHRIZLOOEHFKDUJHGIRUUHSDLURU
replacement of non-registered photometers and damages not covered by this warranty. Registration is
DYDLODEOHRYHUWKHSKRQH([WRURQOLQHDW
http://www.sensafe.com/micro7+/warranty/3HUVRQDOGDWDLVNHSWFRQ¿GHQWLDO
11
eXact® Strip Micro DPD-1 Accuracy
Free Chlorine results are compared using the eXact® Strip Micro CL (DPD-1) with the eXact® Micro 7+ Meter in
Menu CL1 and Hach® DR890 Colorimeter in Program 9 and Program 12 using Hach® powder pillows.
0.00
0.41
0.92
0.79
1.28
2.70
3.20
4.45
5.30
Meter
Menu
Micro 7+ CL1
DR890
Program 9
Program 12
6.0
Micro 7+
0
0.39
0.96
0.73
1.32
2.73
3.22
4.75
5.53
5.5
DPD Free Chlorine study January 21, 2011
Hach vs ITS
y = 1.0402x
R2 = 0.9989
Linear (Hach vs ITS)
5.0
4.5
ITS Free Chlorine, ppm
DR890
Range (PPM)
Resolution
0 to 5.99
6.0 to 11.0
0.00 to 2.20
0.0 to 11.0
0.01
0.1
0.01
0.1
Hach® is a registered trademark of Danaher Corporation
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Hach Free Chlorine, ppm
eXact® Strip Micro 7+ Reagent Reorder Information
eXact® Strip Micro (4mL ) Reagent SpeciÀcations - For use with eXact® Micro 7+, Part no. 486691
No. PARAMETER
eXact® Micro Carrying Case w/ foam*
Dilution Kit
Reference Standard
Mini Dilution Kit II
1 Alkalinity, Total (as CaCO3)*
2 Bromine*
3 Total Hardness (as CaCO3)*
4 Chlorine, Free*
Chlorine, Free
5 Chlorine, High Range*
6 Chlorine, Combined* **
Chlorine, Combined* **
7 Chlorine, Total*
Chlorine, Total
8 Copper (as Cu+2)*
9 Ozone
10 Permanganate
11 pH*
12 Total Iron, TPTZ (as Fe+2/Fe+3)*
PART NO.
486001
487200
486602
487202
486641
486637
486673
486637
484051
486672
486638
484053
486670
484054
486632
486670
486637
486639
486650
# OF TESTS DETECTION RANGE
N/A
N/A
15
N/A
100
100
50
100
100 Foils
50
100
100 Foils
100
100 Foils
50
100
100
100
50
*Included in the Standard Kit (486691-K)
&RPELQHG&KORULQH7HVWUHTXLUHV)UHH&KORULQHWREHUXQ¿UVW
N/A
N/A
N/A
N/A
5 - 200 ppm
0 - 14 ppm
1 - 200 ppm
0 - 11 ppm
0 - 11 ppm
1 - 300 ppm
0 - 11 ppm
0 - 11 ppm
0 - 11 ppm
0 - 11 ppm
0.04 - 8 ppm
0 - 11 ppm
0 - 11 ppm
6.2 - 8.4 pH
0.03 - 5 ppm
Contact Information
12
CHEMISTRY
N/A
N/A
N/A
N/A
Alizarin Red S + Citrate
DPD
Phthalein Purple
DPD
DPD
KI + Buffer
Kl
KI
DPD + Kl
DPD + KI
Biquinoline
DPD + Kl
DPD
Phenol Red
TPTZ + PP