Industrial Test Systems eXact Micro 7+ User manual

Index:
Parameter Page MENU
Free Chlorine (DPD-1) 4 CL1
Permanganate (DPD-1) 4 CL1
Combined Chlorine (DPD-3) 5 CL1
Ozone (DPD-4) 6 CL1
Total Chlorine (DPD-4) 6 CL1
pH 6 PH2
Bromine (DPD-1) 7 BR3
Total Alkalinity (as CaCO3) 7 AL4
Total Hardness (as CaCO3) 8 TH5
Copper (as Cu+2) 8 CU6
Total Iron (as Fe) 9 FE7
High Range Chlorine 9 HR8
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About Your Photometer 3
Tips for Best Accuracy 10
Battery Installation 11
Warranty (2 year) 11
Reorder Information 12
USEPA Compliance 3, 12
Kit Components 12
Visit us online at sensafe.com/micro7+ for up-to-date
product information and to register your warranty.
IDEAL FOR DRINKING WATER, POOLS AND SPAS,
ENVIRONMENTAL, & EDUCATIONAL TESTING
Revision 02/25/14
486691-K Standard Kit
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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Micro 7+
Advanced Photometer System
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Manufactured By: Industrial Test Systems, Inc.
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Phone: [phone] - INSIDE THE U.S.
1-803-329-9712 - OUTSIDE THE U.S.
Fax: [phone]
[email protected]
WWW.SENSAFE.COM
www.poolcheckonline.com
USEPA, DIN, & ISO Compliant for Free & Total Chlorine Testing
(4500-CL G, DIN Standard 38 408 G4, ISO 7393/2)

2
eXact
®
Micro 7+ Photometer
F
E
D
C
B
A
G
H
+
–
ITEM PICTURED
LETTER
COMPONENT
NAME
A
Mixing Cap/Cell Cover
B
Cell (Built-in Plastic, 4mL)
C
LCD Display
D
READ Button
E
MENU Button
F
ZERO/ON Button
G
Battery Cover with loop for lanyard
H
AAA Batteries (x4) (Not Included)
(Used for
testing
outdoors)
eXact®0LFUR0HWHU6SHFLÀFDWLRQV
Measurement Method: Photometric
Light Source: Light Emitting Diode (LED)
Wavelength: 525 nm
Automatic Range Selection: 6HH6SHFL¿FDWLRQVEHORZ
Display: 3-digit customized liquid crystal display
with annunciators
CELL Pathlength: 20mm
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: $$$DONDOLQHEDWWHULHV1RW,QFOXGHG
Battery Life: !WHVWVZLWKDONDOLQHEDWWHULHV
Electromagnetic Compliance: (PLWWHG,QWHUIHUHQFH(1
(EMC) ,PPXQLW\WR,QWHUIHUHQFH(1
Waterproof Rating: ([FHHGV,3
Weight: ,QVWUXPHQWJR]
Dimensions: ,QVWUXPHQW:['[+FP
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2

3
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¿UVWSUHVVHGWKLVEXWWRQWXUQVWKHPHWHURQ:KHQWKHPHWHULVRQDQGWKLVEXWWRQLV
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 2ndODWHVWUHVXOWHWFDQG¿QDOO\ZKLFKLV
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´2YHU5DQJHUHVSHFWLYHO\7KLVIHDWXUHLVPHQXVSHFL¿FDQGGRHVQRWDSSO\WRDOOSDUDPHWHUV
AWWA
4500-Cl G
eXact
®
DPD-1
Anhydrous DPD sulfate
Anhydrous Na
2
HPO
4
Anhydrous KH
2
PO
4
Na
2
EDTA
1.5%
33.4%
64.0%
1.1%
1.5%
33.4%
64.0%
1.1%
Component
(Free Chlorine)
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% (R
2
= 0.9989, 0 - 6.0 ppm - see page 12). The eXact®Micro 7+ Advanced
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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 VHULÀFDWLRQIRU)UHHDQG7RWDO&KORULQH7HVWLQJ
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¿HGby
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.

4
DPD-1 Free Chlorine Test Procedure
1
6
5
2a
3
4
2b
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.
REMOVE STRIP
1
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.
TURN METER ON
2
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.
DIP STRIP AND PRESS “READ”
6
Press the ZERO/ON button. The cursor will move
across the display followed by 0.00 PPM. Sample is
ready for testing.
ZERO METER
5
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.
RINSE AND FILL CELL WITH SAMPLE
4
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)
SELECT TEST: CL1
3
CL
CL1
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).
RECORD RESULT DISPLAYED
7
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.

5
DPD-3 Combined Chlorine Test Procedure
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.
8Remove 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.
REMOVE STRIP
10 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.
9
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).
DIP STRIP AND PRESS “READ”
*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.
eXact
®
Strip Micro CL (DPD-1/DPD-3/DPD-4) Interferences (part nos. 486637/486638/486670)
Interfering Substance
Acidity
Alkalinity
Bromine & Bromamines, Br2
Chlorine Dioxide, ClO2
Copper, Cu+2
Iodine, I2
Manganese, oxidized (Mn+4, Mn+7)
or Chromium, oxidized (Cr+6)
Monochloramines (NH2Cl)
(applies to DPD-1 only)
Ozone, O3
Peroxides
pH
Interfering Levels & Treatments
If sample has acidity above 150mg/L CaCO3test 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 CaCO3test may not develop
full color. Neutralize to pH 6.0 to 7.0 with 0.5N Sulfuric acid.
Color similar to free chlorine reaction at all levels.
Color similar to free chlorine reaction at all levels.
Color development is reduced above 10 ppm (mg/L).
Color similar to free chlorine reaction at all levels.
See AWWA procedure 4500-CL F, 1(d) for removal of interferences.
Monochloramine interferences are known to occur in free chlorine
DPD methods. This interference is dependent on temperature and
monochloramine concentration.
Color similar to free chlorine reaction at all levels.
Interference is possible.
Typical pH samples of potable water with a pH of 6.0 to 9.0 are
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).
CL CL1
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.

6
CL
CL1
PH
PH2
6
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.
DIP STRIP AND PRESS “READ”
5Press the ZERO/ON button. When the display shows 0.0 PH, the sample is ready for testing.
ZERO METER*
4Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
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the water sample.
FILL METER WITH SAMPLE
3Press and re-press the MENU button until the display shows the parameter PH2.
SELECT TEST: PH2
2Press 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.
TURN METER ON
1Remove 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.
REMOVE STRIP
pH Test Procedure
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.
6
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).
DIP STRIP AND PRESS “READ”
5Press the ZERO/ON button.
The cursor will move across the display, followed by 0.00 PPM.
Sample is ready for testing.
ZERO METER*
7
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.
PRESS READ AGAIN
4Rinse the CELL at least 3 times with the water sample you will be testing - rinsing
PLQLPL]HVWKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWR
capacity (4ml) with the water sample.
FILL METER WITH SAMPLE
3Press and re-press the MENU button until the display shows the parameter CL1.
SELECT TEST: CL1
2Press 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.
TURN METER ON
1Remove 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.
REMOVE STRIP
DPD-4 (Total Chlorine or Ozone) Test Procedure

7
Bromine DPD-1 Test Procedure
1Remove 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.
REMOVE STRIP
6
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.
DIP STRIP AND PRESS “READ”
5Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
ZERO METER*
2Press 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.
TURN METER ON
3Press and re-press the MENU button until the display shows the parameter bR3.
SELECT TEST: bR3
4Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWK
the water sample.
FILL METER WITH SAMPLE
1Remove 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.
REMOVE STRIP
6
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
WKLVUHVXOWLVDXWRPDWLFDOO\VWRUHGLQ$/$IWHUWHVWLQJLVFRPSOHWHGULQVHFHOOLPPHGLDWHO\
DIP STRIP AND PRESS “READ”
5Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
ZERO METER*
2Press 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.
TURN METER ON
3Press and re-press the MENUEXWWRQXQWLOWKHGLVSOD\VKRZVWKHSDUDPHWHU$/
SELECT TEST: AL4
4Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWK
the water sample.
FILL METER WITH SAMPLE
Total Alkalinity Test Procedure
bR3
AL AL4
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
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.

8
Total Hardness Test Procedure
1Remove 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.
REMOVE STRIP
6
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.
DIP STRIP AND PRESS “READ”
5Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
ZERO METER
2Press 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.
TURN METER ON
3Press and re-press the MENU button until the display shows the parameter TH5.
SELECT TEST: TH5
4Rinse the CELL 2 or 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\PO
with the water sample.
FILL METER WITH SAMPLE
1Remove 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.
REMOVE STRIP
6
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.
DIP STRIP AND PRESS “READ”
5Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
The sample is ready for testing.
ZERO METER*
2Press 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.
TURN METER ON
3Press and re-press the MENU button until the display shows the parameter CU6.
SELECT TEST: CU6
4Rinse the CELL at least 3 times with the water sample you will be testing - rinsing
PLQLPL]HVWKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWR
FDSDFLW\POZLWKWKHZDWHUVDPSOH
FILL METER WITH SAMPLE
Copper Test Procedure
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
TH
TH5
CU
CU6
NOTE: The Calcium and Magnesium ions react with Phthalein purple to form a purple color depending on the concentration.
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.
INTERFERENCES: Positive interferences are observed if the test sample contains Barium. Interferences also observed if the test
sample contains Copper, Lead, Cobalt or Nickel.

9
*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
NOTE: Reducer will reduce Iron and the Iron will react with TPTZ to form a blue color.
6
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.
DIP STRIP - (read carefully and follow procedure closely)
5Press the ZERO/ON button. The cursor will move across the display, followed by 0.0 PPM. The sample is
ready for testing.
ZERO METER*
2Press 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.
TURN METER ON
3Press and re-press the MENU button until the display shows the parameter HR8.
SELECT TEST: HR8
4Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes the potential
IRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LQDOO\¿OOFHOOWRFDSDFLW\POZLWKWKHZDWHUVDPSOH
FILL METER WITH SAMPLE
High Range Chlorine Test Procedure
HR
HR8
1Remove 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.
REMOVE STRIP
INTERFERENCES: Oxidizers such as Chloramine, Chlorine Dioxide, Bromine, Iodine, Ozone, Bromamines, and Permanganate
will give false positive readings.
*Note: Use a 10 second dip time if water temperature is above 113°F / 40°C.
5Press the ZERO/ON button. The cursor will move across the display, followed by 0.00 PPM.
Sample is ready for testing.
ZERO METER
4
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 1KROGWKHPHWHUXSULJKWDQGWKHFXUVRUZLOOÀDVKDQGWKHPHWHUZLOOEHJLQWRFRXQW
XSWRVHFRQGV$IWHUWKHVHFRQGVDUHVXOWZLOOEHGLVSOD\HGLJQRUHWKLVUHVXOW
ADD REAGENT, CAP, AND MIX
1Press 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.
TURN METER ON
2Press and re-press the MENU button until the display shows the parameter FE7.
SELECT TEST: FE7
3Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes
WKHSRWHQWLDOIRUFURVVFRQWDPLQDWLRQIURPDSUHYLRXVWHVW)LOOFHOOWRFDSDFLW\POZLWKWKH
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.
FILL METER WITH SAMPLE
6
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\FRXQWXSIRUVHFRQGVThe 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).
DIP STRIP AND PRESS “READ”
Total Iron, TPTZ (Fe+2/Fe+3) Test Procedure
FE7
FE
7RWDO,URQ.LW5HGXFHUDQG6WULSV

10
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.
7HVWLPPHGLDWHO\DIWHU¿OOLQJWKHCELL with water sample when testing for oxidizers such as
Chlorine and Bromine (Ozone can be measured in CL3 MENU).
Be sure the CELL LV¿OOHGWRFDSDFLW\POXQOHVVPHQWLRQHGLQWKHSURFHGXUH
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
VWULSVOLWWLQJSURFHVV\RXPD\¿QGRQHRUWZRVWULSVWKDWDUHQRWLFHDEO\VPDOOHURUODUJHULQZLGWK
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
PHWHUXSULJKWDWWKDWGHSWKWR¿OOWKHFHOO5HPRYHPHWHUIURPZDWHUZLWKWKHVDPSOHIRUWHVWLQJ
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™VROXWLRQWKHQ\RXFDQEHFRQ¿GHQWWKDWWKHUHDJHQW\RXDQGWKHSKRWRPHWHUDUHZRUNLQJ
as a SYSTEM correctly.
eXact
®
Micro 7+ Tips For Best Accuracy
Parameter Desired
Value
(ppm)
Acceptable
Value
(ppm)
Free Chlorine 1.52 1.46 - 1.59
R020713
Assigned Value for READY SNAP
™
3 (lot 505) Solution
56;,!=HS\LZYLÅLJ[J\YYLU[JVUJLU[YH[PVUZHZ
MV\UKH[[PTLVMTHU\MHJ[\YLHUKTH`JOHUNL
^P[OJVUZLJ\[P]LSV[Z

11
The following are some common messages that may be displayed, including error messages.
eXact
®
Micro 7+ Meter Messages
About The Built-In Cell
The built-in CELLLVWUDQVSDUHQWSODVWLFDQGZKHQ¿OOHGWRWKHWRSFRQWDLQVPO7KHVWXUG\CELL design
will last for over 20,000 readings. Scratches on the CELL will not interfere or compromise the accuracy of
WKHUHDGLQJVEHFDXVHRILWV¿[HGSRVLWLRQ)RUEHVWDFFXUDF\ULQVHFHOOZLWKFOHDQZDWHULPPHGLDWHO\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)LOOFHOOZLWKFOHDQZDWHUDQGPRYHWKHCell
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).
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
LPSURSHUXVH,IWKHPHWHULVIDXOW\RURWKHUZLVHGHIHFWLYHFRQWDFW,76E\SKRQH([W
or email ([email protected]) 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
,76KRZHYHU,76SD\VUHWXUQSRVWDJH$PD[LPXPSURFHVVLQJIHHRIZLOOEHFKDUJHGIRUUHSDLURU
replacement of non-registered photometers and damages not covered by this warranty. Registration is
DYDLODEOHRYHUWKHSKRQH([WRURQOLQHDW
http://www.sensafe.com/micro7+/warranty/3HUVRQDOGDWDLVNHSWFRQ¿GHQWLDO
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.
5HPRYHWKHXVHGEDWWHULHVDQGLQVWDOOQHZ$$$EDWWHULHVIROORZLQJWKHGLDJUDPIRU
correct polarity (see diagram). We recommend high quality AAA alkaline batteries be used.
5HSODFHWKHEDWWHU\FRYHU%HVXUHWRWLJKWHQWKHFRYHUVHFXUHO\GRQRWRYHUWLJKWHQ7KLVLV
necessary for meter to be waterproof.
'LVSRVHRIWKHXVHGEDWWHULHVLQDFFRUGDQFHZLWK\RXU
local regulations.
3UHVV=(5221EXWWRQWRFRQ¿UPWKHPHWHUWXUQVRQ
The meter is now ready for operation.
7. Meter will not work if battery orientation is incorrect.
To Install/Replace “AAA” Batteries:
TOP VIEW
LCD Message
HI
LO
LO
ER
TR9
&/
Description
In READ mode: test sample concentration is above
WKHPHDVXUHPHQWUDQJHWHVWVSHFL¿F
In READ mode: test sample concentration is below
WKHPHDVXUHPHQWUDQJHWHVWVSHFL¿F
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”.
([FHVVLYHVWUD\OLJKWGHWHFWHG1RUPDOO\WKLV
does not occur, even when testing in sunlight.
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.
'LOXWHVDPSOH¿OWHUVDPSOHRUFOHDQFHOO2QHRI
these options should remedy the problem.
Place the LIGHT BLOCKING CAP over the CELL
for zeroing and for reading result. Moving
WRDVKDGHGDUHDFDQDOVR¿[WKLVSUREOHP
Replace the batteries.
Unscrew and rescrew battery cover to reset.
Unscrew and rescrew battery cover to reset.

12
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.
Contact Information
eXact®Strip Micro DPD-1 Accuracy
y = 1.0402x
R2= 0.9989
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
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
ITS Free Chlorine, ppm
Hach vs ITS
Linear (Hach vs ITS)
DPD Free Chlorine study January 21, 2011
DR890 Micro 7+
0.00 0
0.41 0.39
0.92 0.96
0.79 0.73
1.28 1.32
2.70 2.73
3.20 3.22
4.45 4.75
5.30 5.53
Meter Menu Range (PPM) Resolution
Micro 7+ CL1 0 to 5.99 0.01
6.0 to 11.0 0.1
DR890
Program 9 0.00 to 2.20 0.01
Program 12
0.0 to 11.0 0.1
Hach®is a registered trademark of Danaher Corporation
eXact
®
Strip Micro 7+ Reagent Reorder Information
*Included in the Standard Kit (486691-K)
&RPELQHG&KORULQH7HVWUHTXLUHV)UHH&KORULQHWREHUXQ¿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
PARAMETER
No. PART NO. # OF TESTS DETECTION RANGE CHEMISTRY
eXact
®
Strip Micro (4mL ) Reagent SpeciÀcations - For use with eXact
®
Micro 7+, Part no. 486691
eXact
®
Micro Carrying Case w/ foam*
Dilution Kit
Reference Standard
Mini Dilution Kit II
Alkalinity, Total (as CaCO
3
)*
Bromine*
Total Hardness (as CaCO
3
)*
Chlorine, Free*
Chlorine, Free
Chlorine, High Range*
Chlorine, Combined* **
Chlorine, Combined* **
Chlorine, Total*
Chlorine, Total
Copper (as Cu
+2
)*
Ozone
Permanganate
pH*
Total Iron, TPTZ (as Fe
+2
/Fe
+3
)*
1
2
3
4
5
6
7
8
9
10
11
12
486001
487200
486602
487202
486641
486637
486673
486637
484051
486672
486638
484053
486670
484054
486632
486670
486637
486639
486650
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
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