eXact eXact Micro 20 User manual

Advanced Photometer System

2
eXact®Micro 20 with Bluetooth® SMART Specications 3
About your eXact®Micro 20 photometer 4
About Bluetooth®SMART 4
About eXact®Strip Micro 5
Compliance verication 5
About the eXact iDip®app for Micro 20 with Bluetooth®SMART 6 – 7
Managing data with the eXact iDip®app 8 – 9
eXact® Micro 20 Test Specications 10 – 11
Select group overview 12
eXact® Micro 20 meter messages 12
About the Sample Cell (built–in 4 mL) 13
How to install or replace "AAA" batteries 13
2–Year Limited Warranty 13
Using eXact®Strip Micro (reagent strips) Test Procedure
Alkali pH, Acid pH, Biguanide, Bromine, Calcium Hardness, Chloride,
Chromium, Copper, High Range Chlorine, Hydrogen Peroxide, Nitrate,
Nitrite, Ozone, Peracetic Acid, Peracetic Acid Low, Permanganate,
pH, Phosphate, Quaternary Ammonia Compound QAC,
Sulfate, Total Alkalinity, and Total Hardness HR & LR
14 –15
Using eXact®Reagent (liquid drops) Test Procedure
Cyanuric Acid and Fluoride
16 –17
Free or Total Chlorine 18
Combined Chlorine 19
Aluminum, Ammonia & Sulde 20
Cyanide 21
Total Iron 22
High Range Chloride 23
Manganese 24
Chlorine Dioxide 25
Nitrate (salt water > 4000 ppm) 26
Tips for Best Accuracy 27
About the Accuracy/Calibration of the eXact® Micro 20 System 28
eXact® Strip Micro (DPD–1) Accuracy 28
Accessories / Kits 29
Notes 30
Available Reagents / Reorder Information 31
Contact Information 32
Contents

eXact®Micro 20 with Bluetooth® SMART Photometer Overview
Your new eXact® Micro 20 is ideal for testing Drinking Water, Pools, Spas, Ponds,
Aquariums, Food Process Water, Environmental Waters, and more!
Technical Specications eXact®Micro 20 with Blutooth® SMART (486700BT)
Measurement method Photometric Cell chamber Custom–molded, proprietary, PET
plastic fused into chamber,
non–removable
Light source Light Emitting Diode
(LED) with precision lter
Sample required 4mL (0.13oz)
Wavelength Dual—525nm & 638nm Operating temp range 0 °—50°C (32°—122°F)
Transmission range 100 — 0.00%T Power supply (4) AAA alkaline batteries
Photometric precision +/– 0.1/0.01 %T Battery life >2000 tests
Automatic range selection See specications below Electromagnetic
compliance (EMC)
Emitted interference – EN61326
Immunity to interference –
EN61326
Display 3–digit customized liquid
crystal display with
annunciators Waterproof rating Exceeds IP67
Cell path–length 20 nm Weight 181g (6.4oz) with batteries
Reagent system
Utilizes patented eXact
®
strip
micro reagent delivery system
with our EZ–3™ method
Dimensions 5 x 3.5 x 16.5 cm
(2 x 1.4 x 6.5) in
W x D x H
Wireless
Bluetooth® SMART (requires Bluetooth® 4.0 and Android 4.3 and up or Apple iOS 6.1 and up)
CELL COVER
RESULT
IN PPM
BATTERY
LEVEL
MENU
SELECT
GROUP
4th DIGIT
for >999
SAMPLE CELL
LCD
SCREEN
READ BUTTON
ON/ZERO BUTTON
MENU BUTTON
SELECT BUTTON
BATTERY
COMPARTMENT
COVER
AAA BATTERIES x4
(NOT INCLUDED)
Covers the cell for mixing
and bright light situations
Use to select desired test
within Select groups.
Use to select group number
(7 available)
Built–in plastic 4mL
cell for collecting your
water sample
Appears when meter
is connected with
eXact iDip® app.
Turns the meter on and creates
a baseline for your water testing
Starts test timer

4
About your eXact®Micro 20 photometer
In order to save power, the meter is designed to turn off after 5 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 20 meter is controlled by four buttons:
When rst pressed, the ZERO/ON button powers the meter. When the meter is on
and this button is pressed, it zeros the sample in the cell. It is recommended that
each new water sample analyzed is zeroed before testing, to maximize sensitivity
and accuracy.
With each press, the SELECT button advances through the Select Group 1 through
7. The current Select Group will appear as a small digit to the right of the selected
MENU (example: ).
With each press, the MENU button advances through the tests available in the
current Select Group. 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 latest result, etc; and
nally –01, which is the oldest result retained. Only the last 20 readings are stored in
each menu.
When READ is 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 measure the sample. The meter will simultaneously store 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” (Over Range), respectively. This feature is menu
specic and does not apply to all parameters.
About Bluetooth®SMART
Bluetooth® SMART is a low–power wireless networking standard which uses short radio waves
to allow electronic devices to communicate with each other. The eXact® Micro 20 with Bluetooth®
SMART comes standard with the latest Bluetooth® 4.0 technology (www.bluetooth.com/Pages/
Bluetooth–Smart.aspx), a class 2 device with a wireless working distance of up to 30 feet (10
meters) and a 2.1 Mbps data transfer rate. This allows a seamless transfer of data between a smart
device and the eXact® Micro 20 with Bluetooth® SMART.

5
About
Compliance Verication
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 eXact
®
Micro 20 meter uses a wavelength of 525 nm; and the compliance requirement is that the colorimeter
wavelength is between 490 nm to 530 nm. 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 specied 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), the eXact
®
Strip Micro CL (DPD–4) for Total Chlorine, and the eXact
®
Strip
Micro Cd (DPD–1) for Chlorine Dioxide meet your reportable testing requirements because the eXact
®
Strip Micro strips deliver the same chemicals in identical proportions (see table below). Likewise, AWWA
proportions are followed as required for Total Chlorine measurements using Potassium Iodide. The eXact
®
Strip Micro Chromium is compliant because it uses the same wavelength and delivers the same chemicals
in the same proportions as AWWA method 3500–Cr B. This is also true for Phosphate (Ascorbic Acid
method, AWWA 4500–P E.) and Sulde (Methylene Blue method, AWWA 4500–S
–2
D). Our Ammonia
tests are based on the Nitroprusside/phenate method found in Standard Methods. Interferences are
controlled by EDTA and sodium potassium tartrate. Standard Methods requires an instrument reading in
the range of 630 to 660nm. The Micro 20 reads the reacted sample at 638nm.
Component
(Free Chlorine)
AWWA
4500–CI G
eXact®
DPD–1
Anhydrous DPD sulfate 1.5% 1.5%
Anhydrous Na2HPO433.4% 33.4%
Anhydrous KH2PO4Na264.0% 64.0%
EDTA 1.1% 1.1%
For a complete list of eXact® Strips Micro we offer, please see page 31.
The eXact®Micro 20 with Bluetooth® SMART is designed to work with our line of eXact® Micro Strips.
This type of reagent delivery method is designed to give the most precise accuracy reading for testing
various water quality parameters.
eXact® Strip Micro has been designed to offer the user a more “Green” and cost–effective alternative
to testing. Instead of using a 10 mL water sample, eXact® Strip Micro uses a 4mL water sample,
which uses up to 60% less chemical per test. The accuracy of the meter is maintained by designing
the photo cell with a 20 mm path–length.
e act Strip
e acteact StripStrip

6Subject to technical modications without notice, ©2014 Industrial Test Systems, Inc.
eXact iDip® app overview
History:
Accesses
saved results
which can be
sorted, edited,
and emailed.
Also accesses
History Map
CALENDAr:
Displays your
schedule/
appointments
storE:
Opens store
to unlock
additional tests
CUstoMErs:
Attaches
results to
people and/or
locations from
your
smart
device contacts
tEst:
Initiates water
testing
rEsULts:
Accesses temporary
results that have
not been saved to
history
MENU:
Opens
slide-out for
easy access to
all app features
HOME SCREEN
BLUEtootH
DEviCE
tEstiNg
pArAMEtEr
tEst rEsULt
TEST RESulT SCREEN
tEst
ABBrEviAtioN
pArAMEtEr
UNit of MEAsUrE
Scroll unit of measure values.
Some tests offer results in
multiple units of measure.
Dots iNDiCAtE
MULtipLE UNits of MEAsUrE
(Available for some tests)
®
M20BT B00007v69.02

7
eXact iDip® app overview
Download the App
Using your smart device, download the eXact iDip®app. To see if your smart device is compatible, please
see our compatibility list at sensafe.com/compatible-devices/.
We are constantly improving the eXact iDip®app and welcome your suggestions to help make our
product even better. Visit www.sensafe.com/idip or e-mail your feedback to [e-mail].
Menu
The Menu slide-out is available from any screen within the app. The Menu allows you
to access any of the app’s features with ease.
HOW TO VIEW YOUR GPS LOCATION
ln the Settings screen you can view your current GPS coordinates.
ABOUT
Access the End-User License Agreement and contact information to reach our ofces in the USA and
Europe from the About section located in the Menu slide-out.
Located in the About section you can nd which version of the app you are running. Be sure to check
for updates and install the latest version before running a test as we are constantly updating and adding
more features to the app!
Test
You can utilize two different testing methods under Test;Manual Entry or Bluetooth Device.
BLUETOOTH TEST
Tests will be performed with your eXact®Micro 20.
MANUAL TEST
This feature allows you to utilize other testing methods and manually enter your results into the app. Begin
by selecting ‘Test’, ‘Manual entry’, then ‘Change value’ to enter.
History
The History stores all your saved test result information and allows you to sort by date,
customer name, or test type.
HOW TO SORT BY CUSTOMER
To sort by Customer begin by clicking ‘History’, then ‘Sort by’, ‘Customer’.You can then scroll
through your list of customers, by name, to nd a specic test result.
HOW TO SORT BY DATE
To sort by Date begin by clicking ‘History’ then ‘Sort by’, ‘Date’. You can then scroll through a list of
tests performed by date. You can also set a specic date range period by selecting ‘Date range’.
Then set your From and To date ranges.
HOW TO SORT BY TESTS
To sort by Test begin by clicking ‘History’ then ‘Sort by’,‘Test’.You can then scroll through a list of
tests sorted in alphabetical order.
HOW TO ACCESS HISTORY MAP
The History Map stores GPS locations of testing sites. See page 9 for instructions on utilizing this feature.

8Subject to technical modications without notice, ©2014 Industrial Test Systems, Inc.
eXact iDip®app for eXact®Micro 20 with Bluetooth® SMART
The benets of purchasing an eXact Micro 20 with Bluetooth® SMART is the
ability to connect your photometer to a smartphone or tablet and use our specially
designed app to easily save, send, and share your test results. First, select your
test using the menu selections on your Micro 20 then run the test and the results
will simultaniously display on the app and on your Micro
20 with Bluetooth® SMART. From the app, you can save,
send, and share the results directly linked to your customers information and
GPS location to include date/time stamp. The eXact iDip® app is available
for use on both Apple and Android devices. The app is compatable with
Bluetooth 4.0 devices (Android 4.3 and up and Apple iOS 6.1 and up) For a
full list of compatible devices please visit sensafe.com/compatible–devices/.
When using your eXact®Micro 20 with Bluetooth®SMART and the eXact iDip®
app. You will need to complete the following steps after you have rinsed and
lled your cell with the water sample and prior to zeroing your meter and dipping
your strip.
Please note that batch uploading tests saved on your eXact Micro 20 to a smartphone/tablet is not yet available.
If you want to save a test result from your Micro 20 to the app, you will need to run the test while connected to the app
or enter the result manually.
READ RESULTS
Results will display simultaneously on the
Micro 20 photometer and app.
HOW TO SELECT A CUSTOMER
From your smartphone/tablet, launch the eXact iDip®
app. Select ‘Customers’ from the home screen. From
the Customers list ‘Add customer from contacts’ or
create a new contact by selecting the ‘+’ in the upper
right hand corner.
HOW TO CONNECT VIA BLUETOOTH
Tap the menu slide out screen ‘ ’ and select
‘Bluetooth Test’. Select your eXact®Micro 20 from
the list located at the bottom of the screen. Verify it
has connected and tap ‘OK’.
The serial number is located on the back of your device, this
will display in the app. Refer to the serial number
to ensure you are connected to the correct device.
Please Note: When you select a new customer, this customer will not appear in the list until you have run and saved
a test using the app and your eXact®Micro 20 with Bluetooth®SMART photometer.

9
Managing data with the eXact®iDip app
MANAGING DATA (SAVE/SEND/SHARE)
When all tests have been performed, select ‘Results’ at
the bottom of the screen. To add notes tap the desired
test result.
TYPE NOTES
Add any notes you wish into the
‘Notes’ box. The additions will
be automatically saved.
MANAGING DATA (SAVE/SEND/SHARE)
Go back to ‘Results’ and select ‘Save’ to store the test
results with notes into ‘History’
HOW TO MANAGE DATA IN HISTORY
In History, you can edit, select, and email your results.
To email, you can either tap an individual result, or use
the ‘Select’ button to access multiple data points.
HOW TO EMAIL RESULTS FROM HISTORY
(1) Press the blue envelope icon from a single
result selection.
(2) To select multiple test results, tap ‘select’, choose
results, and then’email’ to send the result information
for all selected results. The app will automatically
attach your test result information and a .csv le
to the email.
Add recipients and tap send to complete.
ACCESSING RESULTS FROM HISTORY MAP
Tap ‘Map’ on ‘History’ page to access the History Map. Double tap or use ngers to zoom into
an area. Select a pin by tapping to bring up results. From the specic location you can bring up
the test results details page.
After you have ran your test, you can save, send, and share your results, by following the steps below.

10
#Parameter / Test Part No. Pg #Count–up
Time Reagents Used Range (ppm) Resolution | Best Accuracy
1Alkalinity, Total (drinking water) 486641 14 AL41AL141Immediate AL Strip 9 – 210 0.1(9–50.0), 1(51–210) 7.5
2Alkalinity, Total (pool water) 486641 14 AL132Immediate AL Strip 8 – 200 0.1(8–50.0), 1(51–200) 7.5
3Aluminum (AI3+)1486821 20 AI36380 seconds 5 Drops AL Buffer & AL Strip 0.01 –1.2 0.01 13
4Ammonia (NH3)486654 20 NH32NH444500 seconds 3 Drops NH (reg. water) or 10 Drops NH (salt water), & NH Strip 0.02 –2.4 0.01 5
5Biguanide 486810 14 bG835Immediate BG Strip 1.6 – 210 0.1(1.6–20.0), 1(21–210) 7.5
6Bromine (DPD–1) 486636 14 bR63bR256Immediate bR (DPD–1) Strip 0.01 – 12 0.01(0.01–2.00), 0.1(2.1–12) 5
7Calcium (as CaCO3)486629 14 CA537Immediate CA Strip 20 – 400 1 6
8Chloride (as NaCL) 486757 14 CH548Immediate CH Strip 3 – 300 1 8
9Chloride, HR (as NaCL) 486757 23 CHH39Immediate 1:20 Dilution of sample & CH Strip 60 – 6000 20 15
10 Chlorine Dioxide (DPD–1) 486633 25 Cd4510 Immediate Glycine Srip & Cd (DPD–1) Strip 0.01 – 10 0.01 5
11 Chlorine, Combined 486637 & 486638 19 CL11CL33CL64CL1511 Immediate CL (DPD–1) Strip & CL (DPD–3) Strip 0.01 –6.2 0.01 3
12 Chlorine, Free (DPD–1) 486637 18 CL11CL33CL64CL1512 Immediate CL (DPD–1) Strip 0.01 –6.2 0.01 3
13 Chlorine, High Range 486672 14 CLH513 120 seconds HR Strip 1 – 300 0.1(1–20.0), 1(21–300) 5
14 Chlorine, Total (DPD–4) 486670 18 CL11CL33CL64CL1514 Immediate CL (DPD–4) Strip 0.01 –6.2 0.01 3
15 Chromium (VI) 486614 14 CR6615 240 seconds Cr Strip 0.01 –1.8 0.01 5
16 Copper (Cu2+)486632 14 CU61Cu9416 120 seconds CU Strip 0.01 – 11 0.01(0.01–4.00), 0.1(4.1–11) 2
17 Cyanide 486812 21 CN1217 600 seconds CN–1 Strip & CN–2 Strip 0.01 –1.1 0.01 13
18 Cyanuric Acid 481652–II 16 CY7318 60 seconds 5 Drops CY 7 – 110 1 8
19 Fluoride 486643 16 F81F1619 Immediate 10 Drops F 0.04 –1.5 0.01 15
20 Hardness, Total HR (as CaCo3)486656 14 THH620 Immediate THH Strip 60 – 600 1 12
21 Hardness, Total LR (as CaCo3)486630 14 THL621 Immediate THL Strip 1 – 80 1 10
22 Hydrogen Peroxide 486648 14 HP6522 100 seconds HP Strip 0.3 – 100 0.1(0.3–10), 1(10.1–100) 8
23 Iron, Total 486650 22 FE31FE2223 40 seconds EZ Open Reducer (Powder) & FE Strip 0.03 – 6 0.01(0.03–2.5), 0.1(2.51–6) 3
24 Manganese (Mn2+)486606 24 MN71MN2624 120 seconds MN#1 Strip, MN#2 Strip, &3 Drops MN 0.01 –1.5 0.01 6
25 Molybdate 486653 Mo7625 120 seconds MO Strip, 5 drops of MO Reagent 0.01 – 3 0.01 5
26 Nitrate (NO3)486655 14 NO3426 600 seconds NO3 Strip 0.1 – 30 0.01(0.1–5.00), 0.1(5.1–30) 15
27 Nitrate (salt water>400 ppm) 486655 26 TR1727 580 seconds NO3 Strip 0 – 90 0.01(0–5.00), 0.1(5.1–30) 15
28 Nitrite (NO2)486623 14 NO2428 360 seconds NO2 Strip 0.01 –1.8 0.01 5
29 Ozone (DPD–4) 486634 14 O3529 Immediate O3 (DPD–4) Strip 0.01 – 2 0.01 4
30 Peracetic Acid Low (DPD–4) 486674 14 PA5530 Immediate PAL (DPD–4) Strip 0.01 – 6 0.01 3
31 Permanganate (DPD–1) 486626 14 PM7531 Immediate PM (DPD–1) Strip 0.01 – 5 0.01 2
32 pH (drinking water) 486639 14 PH2332 Immediate PH Strip 5.8 –8.5 pH 0.1 0.2
33 pH (salt water) 486639 14 PH21PH7433 Immediate PH Strip 5.8 –8.5 pH 0.1 0.2
34 pH, Acid 486624 14 PHA234 Immediate Acid PH Strip 3.2 – 6 pH 0.1 0.3
35 pH, Alkali 486609 14 PHb235 Immediate Alkali PH Strip 7.2 –9.8 pH 0.1 0.3
36 Phosphate (PO4)486814 14 PO42PO43PO8436 120 seconds PO4 Strip 0.03 –4.4 0.01(0.03–2.50, 0.1(2.6–4.4) 4
37 Quaternary Ammonia Compound QAC 486823 14 QA85QA5637 Immediate QA Strip 2 – 80 1 6
38 Sulfate (SO4)486608 14 SO4638 Immediate SO4 Strip 2 – 210 1 10
39 Sulde (S2–) 486818 20 S5239 180 seconds 4 Drops S & S2 Strip 0.01 –1.6 0.01 6
40 Turbidity N/A TU5140 Immediate Distilled or DI water 4–900ntu 1
Group
&
1 2 3 4 5 6 7
For select group & menu overview, see page 12.
eXact®Micro 20 Test Specications

11
#Parameter / Test Part No. Pg #Count–up
Time Reagents Used Range (ppm) Resolution | Best Accuracy
1Alkalinity, Total (drinking water) 486641 14 AL41AL141Immediate AL Strip 9 – 210 0.1(9–50.0), 1(51–210) 7.5
2Alkalinity, Total (pool water) 486641 14 AL132Immediate AL Strip 8 – 200 0.1(8–50.0), 1(51–200) 7.5
3Aluminum (AI3+)1486821 20 AI36380 seconds 5 Drops AL Buffer & AL Strip 0.01 –1.2 0.01 13
4Ammonia (NH3)486654 20 NH32NH444500 seconds 3 Drops NH (reg. water) or 10 Drops NH (salt water), & NH Strip 0.02 –2.4 0.01 5
5Biguanide 486810 14 bG835Immediate BG Strip 1.6 – 210 0.1(1.6–20.0), 1(21–210) 7.5
6Bromine (DPD–1) 486636 14 bR63bR256Immediate bR (DPD–1) Strip 0.01 – 12 0.01(0.01–2.00), 0.1(2.1–12) 5
7Calcium (as CaCO3)486629 14 CA537Immediate CA Strip 20 – 400 1 6
8Chloride (as NaCL) 486757 14 CH548Immediate CH Strip 3 – 300 1 8
9Chloride, HR (as NaCL) 486757 23 CHH39Immediate 1:20 Dilution of sample & CH Strip 60 – 6000 20 15
10 Chlorine Dioxide (DPD–1) 486633 25 Cd4510 Immediate Glycine Srip & Cd (DPD–1) Strip 0.01 – 10 0.01 5
11 Chlorine, Combined 486637 & 486638 19 CL11CL33CL64CL1511 Immediate CL (DPD–1) Strip & CL (DPD–3) Strip 0.01 –6.2 0.01 3
12 Chlorine, Free (DPD–1) 486637 18 CL11CL33CL64CL1512 Immediate CL (DPD–1) Strip 0.01 –6.2 0.01 3
13 Chlorine, High Range 486672 14 CLH513 120 seconds HR Strip 1 – 300 0.1(1–20.0), 1(21–300) 5
14 Chlorine, Total (DPD–4) 486670 18 CL11CL33CL64CL1514 Immediate CL (DPD–4) Strip 0.01 –6.2 0.01 3
15 Chromium (VI) 486614 14 CR6615 240 seconds Cr Strip 0.01 –1.8 0.01 5
16 Copper (Cu2+)486632 14 CU61Cu9416 120 seconds CU Strip 0.01 – 11 0.01(0.01–4.00), 0.1(4.1–11) 2
17 Cyanide 486812 21 CN1217 600 seconds CN–1 Strip & CN–2 Strip 0.01 –1.1 0.01 13
18 Cyanuric Acid 481652–II 16 CY7318 60 seconds 5 Drops CY 7 – 110 1 8
19 Fluoride 486643 16 F81F1619 Immediate 10 Drops F 0.04 –1.5 0.01 15
20 Hardness, Total HR (as CaCo3)486656 14 THH620 Immediate THH Strip 60 – 600 1 12
21 Hardness, Total LR (as CaCo3)486630 14 THL621 Immediate THL Strip 1 – 80 1 10
22 Hydrogen Peroxide 486648 14 HP6522 100 seconds HP Strip 0.3 – 100 0.1(0.3–10), 1(10.1–100) 8
23 Iron, Total 486650 22 FE31FE2223 40 seconds EZ Open Reducer (Powder) & FE Strip 0.03 – 6 0.01(0.03–2.5), 0.1(2.51–6) 3
24 Manganese (Mn2+)486606 24 MN71MN2624 120 seconds MN#1 Strip, MN#2 Strip, &3 Drops MN 0.01 –1.5 0.01 6
25 Molybdate 486653 Mo7625 120 seconds MO Strip, 5 drops of MO Reagent 0.01 – 3 0.01 5
26 Nitrate (NO3)486655 14 NO3426 600 seconds NO3 Strip 0.1 – 30 0.01(0.1–5.00), 0.1(5.1–30) 15
27 Nitrate (salt water>400 ppm) 486655 26 TR1727 580 seconds NO3 Strip 0 – 90 0.01(0–5.00), 0.1(5.1–30) 15
28 Nitrite (NO2)486623 14 NO2428 360 seconds NO2 Strip 0.01 –1.8 0.01 5
29 Ozone (DPD–4) 486634 14 O3529 Immediate O3 (DPD–4) Strip 0.01 – 2 0.01 4
30 Peracetic Acid Low (DPD–4) 486674 14 PA5530 Immediate PAL (DPD–4) Strip 0.01 – 6 0.01 3
31 Permanganate (DPD–1) 486626 14 PM7531 Immediate PM (DPD–1) Strip 0.01 – 5 0.01 2
32 pH (drinking water) 486639 14 PH2332 Immediate PH Strip 5.8 –8.5 pH 0.1 0.2
33 pH (salt water) 486639 14 PH21PH7433 Immediate PH Strip 5.8 –8.5 pH 0.1 0.2
34 pH, Acid 486624 14 PHA234 Immediate Acid PH Strip 3.2 – 6 pH 0.1 0.3
35 pH, Alkali 486609 14 PHb235 Immediate Alkali PH Strip 7.2 –9.8 pH 0.1 0.3
36 Phosphate (PO4)486814 14 PO42PO43PO8436 120 seconds PO4 Strip 0.03 –4.4 0.01(0.03–2.50, 0.1(2.6–4.4) 4
37 Quaternary Ammonia Compound QAC 486823 14 QA85QA5637 Immediate QA Strip 2 – 80 1 6
38 Sulfate (SO4)486608 14 SO4638 Immediate SO4 Strip 2 – 210 1 10
39 Sulde (S2–) 486818 20 S5239 180 seconds 4 Drops S & S2 Strip 0.01 –1.6 0.01 6
40 Turbidity N/A TU5140 Immediate Distilled or DI water 4–900ntu 1
1 Performance veried with various salt systems and water samples
with optimal water temperature at 10°–40°C / 50°–104°F. Optimal
water temperature for Total Alkalinity test is 15°–35°C /59°–95°F.
2 For example: If the sample has 1 ppm of Free Chlorine,
the meter may read 0.97 ppm or 1.03 ppm. Contact sales
department for detailed meter accuracy values.
† Value provided represents best possible accuracy under laboratory conditions, but may vary throughout the detec-
tion range. For a complete list of accuracies throughout all ranges please visit sensafe.com/micro20/specications.
†

12
1 Water Quality 2 Miscellaneous 3 Pool & Spa 4 Environmental
CL1 — Free & Total Chlorine
PH2 — pH
FE3 — Iron
AL4 — Total Alkalinity
TU5 — Total Hardness
CU6 — Copper
MN7 — Manganese
F8 — Fluoride
CN1 — Cyanide
FE2 — Iron (II) & Total Iron
NH3 — Ammonia
PO4 — Phosphate
S5 — Sulde
PHA — Acid pH
PHb — Alkali pH
AL1 — Total Alkalinity
PH2 — pH
CL3 — Free & Total Chlorine
PO4 — Phosphate
CA5 — Calcium Hardness
bR6 — Bromine
Cy7 — Cyanuric Acid
bG8 — Biguanide
CHH —
Chloride High Range
AL1 — Total Alkalinity
NO2 — Nitrite
NO3 — Nitrate
NH4 — Ammonia
CH5 — Chloride
CL6 — Free & Total Chlorine
PH7 — pH
PO8 — Phosphate
CU9 — Copper
5 Oxidizers 6 Specialty 7 Transmission
CL1 — Free & Total Chlorine
bR2 — Bromine
O3 — Ozone
Cd4 — Chlorine Dioxide
PA5 — Peracetic Acid Low
HP6 — Hydrogen Peroxide
PM7 — Permanganate
QA8 — Quaternary Ammonia
Compound QAC
CLH — Chlorine High Range
F1 — Fluoride
MN2 — Manganese
AI3 — Aluminum
SO4 — Sulfate
QA5 — Quaternary Ammonia
CR6 — Chromium
Mo7 — Molybdate
THH — Total Hardness
High Range
THL — Total Hardness
Low Range
TR1 — Transmission (525nm)
TR2 — Transmission (638nm)
LCD Message Description Corrective Action
HI In READ mode: test sample concentration is above the
measurement range (test specic).
Dilute and retest. Dilution kit available
(Part No. 487200)
LO In READ mode: test sample concentration is below the
measurement range (test specic).
Sample value is below
measurement range.
LO In ZERO mode: sample absorbency (due to a cloudy
or colored sample or a dirty cell) is too high to zero, the
meter will read “LO” or low battery
Dilute sample, lter sample or clean
cell. One of these options should
remedy the problem. You may need
to replace batteries if low battery
indication.
ER Excessive stray light detected. Normally this does not
occur, even when testing in sunlight.
Place the light blocking CAP over the
CELL for zeroing and for reading result.
Moving to a shaded can also x
this problem.
Low battery indication during testing
(meter may not zero)
Replace batteries immediately. Otherwise
meter may read LO while testing.
Flashing result
on LCD
Lost connection to eXact iDip®app Press ON/ZERO to stop ashing. Remove
and replace the battery cover if ashing
continues for future tests.
Select group overview
eXact® Micro 20 meter messages
Below is a list of Menu and selection choices with abbreviations.
The following are some of the common messages that may display on your photometer, including error
messages. If an error message other than those listed below is displayed, please contact technical
support in the USA at (803) 329–0162 (ext. 0).

13
About the Sample Cell (built–in 4 mL)
How to install or replace "AAA" batteries
2–year limited warranty
The built–in Sample Cell (CELL) is transparent plastic and, when lled to the top, contains 4 mL. The
sturdy CELL design will last for over 20,000 readings. Scratches on the CELL will not interfere or
compromise the accuracy of the readings because of its xed position. For best accuracy, rinse cell
with clean water immediately after 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: Fill cell
with clean water and move the 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, Sulfate, Chloride, and Cyanuric Acid).
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 improper use. If the meter is faulty or otherwise defective contact ITS by phone (+1–803–
329–9712 Ext. 0) or email ([e-mail]) 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 ITS. ITS pays postage when photometer is returned to customer. A maximum processing fee of $75
will be charged for repair or replacement of non–registered photometers and damages not covered by
this warranty. Registration is available over the phone [phone] Ext. 0) or on–line at http://
www.sensafe.com/micro/warranty/ (Personal data is kept condential).
Unscrew the O–ring sealed battery cover counter–clockwise. Use proper sized pliers if necessary.
Do not disturb the sealing O–ring.
Remove the used batteries and install 4 new AAA batteries following the diagram for correct polarity
(see diagram). We recommend high quality AAA alkaline batteries be used.
Replace the battery cover. Be sure to tighten the cover securely. This is necessary for meter to
ensure it is waterproof.
Dispose of the used batteries in accordance with your local regulations.
Press button to conrm the meter turns on.
The meter is now ready for operation.
Meter will not work if battery orientation is incorrect.
Batteries are not included. The meter requires (4) AAA in order to function.
1
2
3
4
5

14
Using eXact®Strip Micro Standard strip test procedure
Used for Acid pH, Alkali pH, Total Alkalinity
8
, Biguanide, Bromine, Calcium Hardness
2
, Chloride
3
, Chlorine High Range
5
,
Chromium
4
, Copper, Total Hardness High Range
1
, Total Hardness Low Range
1
, Hydrogen Peroxide, Nitrate
6
, Nitrite, Ozone,
Peracetic Acid, Paracetic Acid Low, Permangante, pH, Phosphate
7
, Quaternary Ammonia Compound QAC, Sulfate
(SEE PAGE 15 FOR SPECIAL NOTES)
REMOVE STRIP
Remove 1 eXact®Strip Micro (ex. Total Alkalinity) 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 button to power the meter on; the display will
show all annunciators, then the current selection, followed
by the last reading.
RINSE CELL AND FILL WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you
will be testing (rinsing minimizes the potential for cross–
contamination from a previous test). Finally, ll the CELL to
capacity with the water sample.
ZERO METER*
Press the button. The cursor will move across the display
followed by a display reading of 0.00 PPM. This indicates the
sample is ready for testing.
1
2
SELECT GROUP AND MENU
Press and re–press the button to Select your group.
Then, press and re–press the button to select the test
parameter (see chart on page 10–11).
4
5
DIP STRIP & PRESS READ
Dip the required strip into the CELL, and immediately press
This will start a 20 second countdown timer. During this time,
move the strip in a gentle back and forth motion (approx. 2
strokes per second). Remove and discard the strip after ‘1’
on the display disappears.
RECORD RESULT
The cursor will move across the display while the meter
prepares to measure the sample. Record the value displayed
for the respective parameter. This value is automatically stored
in its MENU and if using the eXact iDip® app, the result will be
saved in the app’s ‘HISTORY’.
6
7
Follow the steps to ‘SELECT CUSTOMER’ & ‘CONNECT DEVICE VIA BLUETOOTH’ before
proceeding (see page 8).
*For best accuracy, when testing outdoors in sunlight, place cap over cell cover
3

15
eXact®Strip Micro test procedure (SPECIAL NOTES)
1Total Hardness, HR & LR— Positive interferences are observed if the test sample contains Barium.
Interferences also observed if the test sample contains Copper, Lead, Cobalt, or Nickel. The pH of the
sample for Total Hardness High Range should be between 6.9 and 7.2. If the pH not in this range,
the water sample pH has to adjust to pH 7 before doing the test.
2Calcium Hardness — This test is accurate in water with Chloride < 2,000 ppm as NaCl. Chloride
levels from 12,000 to 24,000 ppm as NaCl give 10-15% error. For samples with Chloride levels greater
than 25,000 ppm as NaCl, contact ITS for a look-up table.
3Chloride — If sample pH is high (>9), adjust pH to 5–6 using Vinegar.
4Chromium — The strip needs to be angled in order to fit in the CELL because it is too wide.
5 High Range Chlorine — Use a 10 second dip time if water temperature is above 40°C (113°F).
INTERFERENCES: Oxidizers such as Chloramine, Chlorine Dioxide, Bromine, Iodine, Ozone,
Bromamines, and Permanganate will give false positive readings.
6 Nitrate — A. Use this procedure if NaCl is less than 400 ppm. Otherwise, use Nitrate (Salt Water)
Procedure on page 26. B. The CELL needs to be cleaned with brush and distilled water after each test.
If any zinc dust is adhering to the CELL wall, it will affect results.
7 Phosphate — A. Clean CELL with 0.1N HCl, Distilled Vinegar (5%), or Muriatic Acid before filling the
meter with the sample to be tested. B. If running multiple tests in a row, using the same water sample,
the CELL does not have to be rinsed or cleaned with acid between each test. It is recommended that
the CELL be rinsed three times with the sample water. C. The calibration of the meter is based on a
water temperature between 15°C (59°F) and 31°C (88°F). If temperature is below 15°C (59°F), your final
Phosphate value may read low. This test can also be used for salt water testing.
8 Total Alkalinity — For water temperatures above 35°C (95°F, hot tubs), remove and discard the strip
when the timer displays “10”, countdown continues.
The eXact®Micro 20 Dual Wavelength Advanced Photometer System is designed
for use with the eXact®Strip Micro reagent delivery system. The eXact®Micro 20
Dual Wavelength Photometer is manufactured and tested in an ISO 9001 Facility.

16
Using eXact®reagent Standard liquid test procedure
Used for Cyanuric Acid1 and Fluoride2
TURN METER ON
Press the button to power the meter on; the display will
show all annunciators, then the current selection, followed
by the last reading.
RINSE CELL AND FILL WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you
will be testing (rinsing minimizes the potential for cross–
contamination from a previous test). Finally, ll the CELL to
capacity with the water sample.
ZERO METER*
Cover the CELL with the CELL COVER and press the
button. The cursor will move across the display followed by a
display reading of 0.00 PPM. Tilt the meter to discard about
0.2mL water in order to leave room for liquid reagent. Sample
is ready for testing.
ADD DROPS
Remove the CELL COVER and, using the selected bottle of
reagent, add the required drops (see chart on pages 10–11)
and cover the CELL with the CELL COVER. Precaution:
Ensure that the bottle is straight when dispensing drops.
1
2SELECT GROUP AND MENU
Press and re–press the button to Select your group.
Then, press and re–press the button to select the test
parameter (see chart on page 10–11).
3
4
PRESS READ & MIX
Press and a 20 second countdown begins. During this
time, turn the meter upside down repetitively. When the timer
displays ‘1’, place the Micro 20 on a at surface. Wait for
count– up time.
RECORD RESULT
The cursor will move across the display while the meter
prepares to measure the sample. Record the value displayed
for the respective parameter. This value is automatically stored
in its MENU and if using the eXact iDip® app, the result will be
saved in the app’s ‘HISTORY’.
6
7
5
Follow the steps to ‘SELECT CUSTOMER’ & ‘CONNECT DEVICE VIA BLUETOOTH’ before
proceeding (see page 8).
*For best accuracy, when testing outdoors in sunlight, place cap over cell cover

17
eXact®reagent liquid drops (SPECIAL NOTES)
Some test procedures require the use combination of more than one test strip and/or
liquid reagents. Please follow the step–by–step procedures as outlined in the following
pages to ensure the best accuracy. For more tips on best accuracy, see page 28.
Any deviation from the outlined procedure, could result in inaccurate test results. Please
take caution to testing notes. If your required procedure is not listed in this manual or if
you have any questions, feel free to contact us at [e-mail]
1Cyanuric Acid — Shake the bottle vigorously to mix before adding the drops to the sample
2Fluoride — The reagent contains acid, a stir bar may be used to mix the reagent.

18
Free or Total Chlorine test procedure
TURN METER ON
Press the button to power the meter on; the display will
show all annunciators, then the current selection, followed
by the last reading.
2
3SELECT GROUP AND MENU
Press and re–press the button to Select your group
(Select 1, 4, or 5). Then, press and re–press the button
to select the CL1 or CL6 test parameter.
5ZERO METER*
Press the button. The cursor will move across the display
followed by a display reading of 0.00 PPM. This indicates the
sample is ready for testing.
5
DPD–1 strip used for Free Chlorine detection, DPD–4 strip used for Total Chlorine detection
DIP STRIP & PRESS READ
Dip the required strip into the CELL, and immediately press
This will start a 20 second countdown timer. During this time,
move the strip in a gentle back and forth motion (approx. 2
strokes per second). Remove and discard the strip after ‘1’
on the display disappears*.
6
RECORD RESULT
The cursor will move across the display while the meter
prepares to measure the sample. Record the value displayed
for the respective parameter. This value is automatically stored
in the CL MENU, and if using the eXact iDip® app, the result
will be saved in the app’s ‘HISTORY’
7
IMPORTANT: DO NOT discard the sample from the Free Chlorine (DPD–1) test if you are planning to run eXact
®
Strip Micro
DPD–3 (Total Chlorine) Procedure. Move directly to steps 8–10 on the next page, otherwise immediately rinse the CELL.
Follow the steps to ‘SELECT CUSTOMER’ & ‘CONNECT DEVICE VIA BLUETOOTH’ before
proceeding (see page 8).
*For best accuracy, when testing outdoors in sunlight, place cap over cell cover
RINSE CELL AND FILL WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you
will be testing (rinsing minimizes the potential for cross–
contamination from a previous test). Finally, ll the CELL to
capacity with the water sample.
4
REMOVE STRIP
Remove 1 eXact®Strip Micro CL (DPD–1), Part No. 486637
or eXact®Strip Micro CL (DPD–4), Part No. 486670 from
the bottle before beginning the test. Set the strip in a dry,
convenient place and recap the bottle immediately.
1

19
Combined Chlorine test procedure
REMOVE STRIP
Remove 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.
8
This procedure is only valid when ran as a continuation of the eXact®Strip Micro
CL (DPD–1 Free Chlorine). Test procedure located on the previous page.
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 2 minutes and then make your measurement.
6DIP STRIP & PRESS READ
Dip the eXact®strip micro (DPD–3) into the CELL, and
immediately press This will start a 20 second countdown
timer. During this time, move the strip in a gentle back and
forth motion (approx. 2 strokes per second). 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 the value displayed and this
value is automatically stored in the CL MENU, the result will
be saved in the app’s ‘HISTORY’.
(NOTE: The Iodide added with DPD–3 will, in the presence of
Combined Chlorine or Chloramines, convert into Iodine).
9
PRESS READ AGAIN
Press 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 the CL MENU. After testing is
completed, rinse CELL immediately. Record the highest value the meter
displayed as your Total Chlorine result.
10
*For best accuracy, when testing outdoors in sunlight, place cap over cell cover
Interfering Substance Interfering Levels and Treatments
Acidity 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.
Alkalinity If sample has alkalinity above 200mg/L CaCO3 test may not
develop full color. Neutralize to pH 6.0 to 7.0 with 0.5N Sulfuric acid.
Bromine and Bromamines, Br2 Color similar to free chlorine reaction at all levels.
Chlorine Dioxide, ClO2 Color similar to free chlorine reaction at all levels.
Copper, Cu2+ Color development is reduced above 10 ppm (mg/L).
Iodine, I2 Color similar to free chlorine reaction at all levels.
Manganese, oxidized (Mn4+, Mn7+)
or Chromium, oxidized (Cr6+)
See AWWA procedure 4500-CL F, 1(d) for removal of interferences.
Monochloramines (NH2Cl)
(applies to DPD-1 only)
Monochloramine interferences are known to occur in free chlorine
DPD methods. This interference is dependent on temperature and
monochloramine concentration.
Ozone, O3 Color similar to free chlorine reaction at all levels.
Peroxides Interference is possible.
pH 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).

20
TURN METER ON
Press the button to power the meter on; the display will show annunciators, followed by
the current selection. It will then display the last reading.
RINSE & FILL CELL WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you will be testing—rinsing minimizes
the potential for cross–contamination from a previous test. Finally, ll CELL to capacity with
the water sample. Tilt meter to discard about 0.2mL water to leave room for liquid reagent.
SELECT GROUP & MENU
Press and re–press the button to Select Group. Press and re–press the button to
select the test parameter (see chart on page 10–11).
ADD DROPS
Using the selected bottle of reagent add the required drops (see chart on page 10–11) and
cover the CELL with the CELL COVER. Precaution: Ensure that the bottle is straight when
dispensing drops.
ZERO METER*
Press the button. The cursor will move across the display followed by 0.00 PPM. This will
indicate that the sample is ready for testing.
DIP STRIP & PRESS READ
Using the required strip (see chart on page 10–11), dip strip into the CELL, and immediately
press to initiate a 20 second countdown. Move the strip using a gentle back and forth
motion (approx. 2 strokes/sec). Remove and discard the strip after “1” on the display
disappears*. The meter will automatically start to count up. The count up time will vary for
each parameter. At the end, the cursor will move across the display while the meter prepares
to measure the sample. Record the value displayed for the respective parameter This value
is automatically stored in its MENU and if using the eXact iDip® app, the result will be saved in
the app’s ‘HISTORY. After testing, rinse CELL immediately and clean with the brush. After Sulde
testing: rinse CELL with Distilled White Vinegar, 0.1N HCl, or Muriatic Acid and clean with brush.
1
2
3
4
5
6
Aluminum, Ammonia & Sulde test procedure
Aluminum, Ammonia & Sulde (SPECIAL NOTES)
1Aluminum — A. First, clean the CELL with 0.1N HCl, Distilled Vinegar (5%), or Muriatic Acid before
filling the meter with the sample to be tested. B. If running multiple tests in a row, using the same
water sample, the CELL does not have to be rinsed or cleaned with acid between each test. It is
recommended that the CELL be rinsed 3 times with the sample water.
2Ammonia — The calibration of the meter is based on a water temperature between 14°C (57°F) and
28°C (82°F). If temperature is below 14°C (57°F), your final Ammonia value may read low.
3 Sulde — A. For results as Hydrogen Sulfide (H2S), multiply the resulting value by 1.06. B. The
calibration of the meter is based on the water sample temperature above 20°C (68°F). If the water
sample is below 20°C (68°F), the strip has to dip in the sample for an additional 10 seconds.
Follow the steps to ‘SELECT CUSTOMER’ & ‘CONNECT DEVICE VIA BLUETOOTH’ before
proceeding (see page 8).
*For best accuracy, when testing outdoors in sunlight, place cap over cell cover