YSI EcoSense ODO200 User manual

USER MANUAL
English, Français, Español, Português
EcoSense®ODO200
Dissolved oxygen & temperature
instrument
User Manual
DOCUMENT #606335

CONTENTS
Warranty ................................................................................................i
Introduction .........................................................................................1
Getting Started ....................................................................................1
Initial Inspection.....................................................................1
Precautions .............................................................................1
The Probe.........................................................................1
Initial Setup ............................................................................2
Preparing the Probe ........................................................2
Battery Installation...........................................................3
Key Pad....................................................................................4
Main Display ..........................................................................5
Operational Procedures - Taking Measurements.............................6
Measurement Modes - % or mg/L........................................7
Sampling modes - Continuous or Manual...........................7
Saving, Viewing and Deleting Data......................................7
Calibration ..............................................................................8
Temperature.....................................................................8
Dissolved Oxygen ...........................................................8
Maintenance and Troubleshooting ...................................................9
Sensor Maintenance - Dissolved Oxygen............................9
Cleaning the Sensor Cap................................................9
Sensor Cap Replacement ............................................10
Entering Sensor Cap Coefficients into the EcoSense
ODO200.........................................................................11
Rehydrating the Sensor Cap ......................................12
Sensor Maintenance - Temperature ...................................12
Sensor Storage.....................................................................12
Short-term Storage ......................................................12
Long-term Storage ........................................................13

Troubleshooting...................................................................13
Specifications.....................................................................................14
Accessories / Part Numbers .............................................................15
Contact Information and Service .....................................................16
Ordering and Technical Support........................................16
Service Information..............................................................16
Recycling...............................................................................16
Appendix A-DO% Calibration Values..............................................17

i
WARRANTY
The EcoSense® ODO200 Instrument, probe, cable and sensor cap are
warranted for one year from date of purchase by the end user against
defects in materials and workmanship, exclusive of batteries and any
damage caused by defective batteries. Within the warranty period, YSI will
repair or replace, at its sole discretion, free of charge, any product that YSI
determines to be covered by this warranty.
To exercise this warranty, write or call your local YSI representative, or
contact YSI Customer Service in Yellow Springs, Ohio at [phone],
800-765-4974 or visit YSI.com for a Product Return Form. Send the product
and proof of purchase, transportation prepaid, to the Authorized Service
Center selected by YSI. Repair or replacement will be made and the
product returned, transportation prepaid. Repaired or replaced products
are warranted for the balance of the original warranty period, or at least 90
days from date of repair or replacement.
Limitation of Warranty
This Warranty does not apply to any YSI product damage or failure caused
by: (i) failure to install, operate or use the product in accordance with
YSI’s written instructions; (ii) abuse or misuse of the product; (iii) failure
to maintain the product in accordance with YSI’s written instructions or
standard industry procedure; (iv) any improper repairs to the product; (v)
use by you of defective or improper components or parts in servicing or
repairing the product; or (vi) modification of the product in any way not
expressly authorized by YSI.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDINGANYWARRANTY OFMERCHANTABILITYOR FITNESS
FOR A PARTICULAR PURPOSE. YSI’s LIABILITY UNDER THIS WARRANTY
IS LIMITED TO REPAIR OR REPLACEMENT OF THE PRODUCT, AND THIS
SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY DEFECTIVE
PRODUCT COVERED BY THIS WARRANTY. IN NO EVENT SHALL YSI BE
LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING FROM ANY DEFECTIVE PRODUCT COVERED BY
THIS WARRANTY.

1
INTRODUCTION
Thank you for purchasing the EcoSense ODO200, a precise handheld
instrument that measures temperature and dissolved oxygen in % and
mg/L. The EcoSense ODO200 measures dissolved oxygen in water
using optical, lifetime luminescence technology and uses a digital
signal to send information between the instrument and probe. Key
advantages of the EcoSense ODO200 include the elimination of sensor
flow dependence (stirring) and sensor warm-up time, greater stability,
less frequent calibrations, and the elimination of frequent membrane/
electrolyte changes. This instrument uses one 9V battery.
GE T TING S TA R TED
THE PROBE
Sensor caps last longer if stored in a moist environment and kept clean
and free of scratches in the paint layer. Erratic readings can result from
damaged or dirty caps. If unstable readings occur from large scratches
in the paint or dye layer, replace the sensor cap. See the Maintenance
and Troubleshooting section of this manual for information on how to
clean or replace the sensor cap. The average sensor cap replacement
interval is 12 to 18 months, although they may last longer.
Avoid substances that may damage probe materials such as
concentrated acid, caustics and strong solvents. Probe materials
include urethane (cable), Xenoy (probe body), acrylic (sensor cap) and
acetal and stainless steel (probe guard).

2
To prevent the sensor cap from drying out, store the probe in the gray
calibration/storage sleeve with a moistened, clean sponge. In the event
the sensor cap dries out, rehydrate it following the instructions in the
Maintenance and Troubleshooting section of this manual.
INITIAL SETUP
Throughout the manual, the term “probe” refers to the end of the cable
where the sensor is located, the term “sensor” refers to the Optical
Dissolved Oxygen sensing portion of the cable/probe assembly, and
the term “sensor cap” refers to the removable sensing cap that is
replaced about once per year (Figure 1).
Figure 1
PREPARING THE PROBE
Each EcoSense ODO200 sensor cap has unique calibration coefficients
associated with it. These coefficients are labeled on the instruction
sheet included with each EcoSense ODO200 cable/probe assembly
and replacement ODO200 sensor cap.
Remove the probe/cable assembly from the shipping container and
locate the sensor cap instruction sheet. Be sure to save the instruction
sheet in case you need to reload these calibration coefficients.
New probe/cable assemblies have the sensor cap installed and
coefficients loaded into the probe at the factory. When a cable is
installed, the coefficients are automatically sent to the instrument.
Preparing the probe for the first time:
1. Remove the probe guard from the probe by turning it
counterclockwise.
2. Remove the red storage cap which contains a moist sponge from
the end of the probe by pulling it straight off the sensor. Save this
to use later for long term storage.
Sensor
Probe
Sensor Cap

3
3. Reinstall the probe guard by sliding it carefully over the sensor and
then threading it onto the cable/probe assembly with a clockwise
rotation (Figure 2).
4. Locate the gray calibration/storage sleeve that was shipped with
your probe/cable assembly. Moisten the sponge in the gray
calibration/storage with a small amount of clean water.
5. Slide the calibration/storage sleeve over the probe guard to keep
the probe in a moist environment for storage and calibration
(Figure 3). It is important to always keep your sensor in a moist
environment so the sensor cap does not dry out.
6. Connect the cable to the instrument by aligning the connectors,
pushing them together and then screwing down the retainer
clockwise.
Figure 2 Figure 3
BATTERY INSTALLATION
To install (or replace) the battery, remove
the two battery cover screws and battery
cover. Replace the 9V battery. Replace the
battery cover and o-ring (be sure to align
the o-ring correctly to prevent a bad seal)
and fasten the two battery cover screws.
An initial display of “LOW BAT” on the
LCD indicates approximately one hour of
battery life for unit operation within specifications. Replace battery
when “LOW BAT” appears on the LCD.
Battery Disposal
This instrument is powered by a 9 volt battery, which the user must
remove and dispose of when the battery no longer powers the
instrument. Disposal requirements vary by country and region, and
users are expected to understand and follow the battery disposal
requirements for their specific locale.
Figure 4

4
KEY PAD
Number Key Description
1Power key. Turns the unit on or off.
2, 6 Up and down arrow key. Used
to adjust inputs for salinity
correction, calibration and
sensor cap coefficients
3Calibration key. Press to calibrate
the dissolved oxygen sensor.
4Cap key. Press to enter new
sensor cap coefficients.
1
3
2
4
5
6
7
8
Figure 5

5
5Mode key. Adjusts between
measurement modes (%, mg/L),
recalling saved data (rCL) and
deleting saved data (dEL).
7Enter key. Used to confirm
calibration, to save data
from run screen, to select
data mode (rCL/dEL), and
confirm coefficient entries.
8Sample/Mode key. Press and
hold for 3 seconds to switch
between continuous and manual
measurement modes. Press and
release to restart the measurement
when in manual mode. Continuous
mode: the instrument will
continuously update the dissolved
oxygen measurement. Manual
mode: the instrument will update
the DO reading until reaching a
stable measurement. The stable
measurement will be ‘locked’ on
the display until the user initiates
a new measurement reading by
pressing the Sample/Mode key.
MAIN DISPLAY
1
2
3
4 5
6
7
8
9
10

6
Number Description
1
BAT: Low battery indicator.
2
Continuous or Manual sampling mode indicator.
When in Manual mode, manual will blink until the
measurement is stable.
3
CAL: Calibration mode indicator.
4
Data record indicator.
5
Temperature reading in Celsius.
6
mbar: Displays during calibration to prompt user for
true barometric pressure.
7
Main display for dissolved oxygen measurements in
either % or mg/L.
8
Save, Full, Recall, Each, All, Delete: Instrument’s data
storage indicators.
9
SAL ppt: Displays during calibration when user is
prompted for the approximate salinity (in ppt) of the
sample to be tested.
10
CAP, K1, K2, K3, K4, K5, KC: Sensor cap coefficient
indicators when entering new sensor cap coefficients.
OPERATIONAL PROCEDURES -
TAKING MEASUREMENTS
Press to turn the unit on or off. When turned on, the instrument will
perform a self-diagnostic test during which an error message may
display. This is normal. After the self-diagnostic test completes, the
temperature displays in the lower right and the dissolved oxygen
measurement displays in the center of the display (figure 6). The unit is
ready for operation. If necessary, perform a 1-point dissolved oxygen
calibration. The digital instrument and probe can hold its calibration
for many months but should be verified regularly.
Immerse the probe into the sample solution to take a measurement.
When the unit is not in use, turn it off to save battery life. It is not
necessary to recalibrate the instrument after turning it off and back on.
The instrument has a 30 minute auto shut off feature when not in use.
Figure 6

7
MEASUREMENT MODES - % OR MG/L
This unit provides three distinct measurements: Temperature and
Dissolved Oxygen in either % or mg/L.
The dissolved oxygen measurement unit is indicated on the right side
of the display. Press Mode to switch between % and mg/L.
SAMPLING MODES - CONTINUOUS OR MANUAL
The ODO200’s sampling mode can be set to Manual or Continuous.
Press and hold the Sample/Mode key for 3 seconds to switch between
Continuous and Manual mode. When in Manual mode, press and
release Sample/Mode to initiate a new measurement.
Continuous mode: the instrument will continuously update the
dissolved oxygen measurement.
Manual mode: the instrument will update the DO reading until
reaching a stable measurement. The stable measurement will ‘lock’ on
the display until the user initiates a new measurement by pressing the
Sample/Mode key. Manual mode conserves battery power.
SAVING, VIEWING AND DELETING DATA
The ODO200 can save 50 data records. When in measurement mode,
press Enter to save a record. The instrument will confirm saving
the data by displaying SAVE and the data record number for one
second. “Full” is displayed when trying to save data and memory is full.
To view saved data, press Mode until Recall (rCL) is displayed and then
press Enter. Use the Up or Down arrow keys to review different saved
records. Press Mode to escape back to measurement mode.
To delete data records, press Mode while in measurement mode
until Delete (dEL) is displayed. Press Enter. “All” will be displayed and
blinking. Press the Up or Down arrow key to switch between delete ‘All’
or ‘Each’ options. Select either ‘All’ or ‘Each’ by pressing Enter while
that option is displayed.
If ‘All’ is selected, all records will be deleted from memory and ‘None’
will be displayed. Press Mode twice to return to the measurement
mode.

8
If ‘Each’ is selected, the Up and Down arrow keys will allow you to scroll
through the saved data records. Press Enter to delete the selected
record. All records after the deleted record will shift up to keep the
records in sequential order. For example, if record 3 is deleted, record
4 will become record 3 and record 5 will become record 4. Press Mode
twice to return to the measurement mode.
CALIBRATION
TEMPERATURE
All EcoSense ODO200 cables have a built-in thermistor. Temperature
calibration is not available or required.To verify the temperature sensor,
compare it to a NIST traceable thermistor by touching the thermistors
together and observing the measurements.
DISSOLVED OXYGEN
The ODO200 sensor is an optical luminescent sensor which has greater
stability and is less susceptible to calibration drift than traditional
electrochemical sensors. This increased stability means the instrument
can hold its calibration for many months; however, calibration should
be verified regularly for highest data accuracy.
To verify the instrument’s calibration, place the sensor in its calibration
environment and check to see that the DO% is reading its calibration
value based on the barometric pressure. Refer to Appendix A for the
DO% calibration values based on barometric pressure.
Calibration Requirements:
• The approximate true barometric pressure in millbars (mBar) of the
location at the time of calibration.
True Barometric Pressure (mmHg) =
[Corrected BP mmHg] – [2.5 * (Local Altitude in ft. above sea level/100)]
mBar = mmHg *1.333
• The approximate salinity of the water to be analyzed. Fresh
water’s salinity value is approximate zero parts per thousand (ppt).
Seawater has an approximate salinity of 35 ppt.
1. Moisten the sponge in the gray storage sleeve with a small
amount of clean water. The moistened sponge creates a 100%
water-saturated air environment for the probe, which is ideal

9
for calibration, transport, and storage of the EcoSense ODO200
probe.
2. Make sure there are no water droplets on the sensor cap or
temperature sensor and then install the storage sleeve over the
guarded probe. Make sure the DO and temperature sensors are
not touching the sponge or immersed in water. Turn the instrument
on and wait approximately 5 to 10 minutes for the storage sleeve
to become completely saturated and to allow the temperature and
dissolved oxygen sensors to stabilize.
3. Press CAL.
4. The display prompts for the local, true barometric pressure in
mBar (millibars). Use the Up and Down Arrow keys to increase or
decrease the barometric pressure value, then press Enter.
5. The display will show the current dissolved oxygen measurement
on the main display and the calibration value in the lower right
corner. Wait for the DO measurement to stabilize, then press Enter.
6. The display prompts for the approximate salinity of the water
to be analyzed. Use the Up and Down Arrow keys to increase or
decrease the salinity compensation value to the salinity value of
your sample (between 0 to 40 parts per thousand [ppt]). When the
correct salinity displays, press Enter.
7. The unit holds calibration for several months, even when powered
off and on.
MAINTENANCE AND
TROUBLESHOOTING
SENSOR MAINTENANCE - DISSOLVED OXYGEN
CLEANING THE SENSOR CAP
The Sensor Cap should be kept clean since some types of fouling can
consume or produce oxygen or block the water sample from reaching
the sensor which could affect the dissolved oxygen measurements.
To clean the Sensor Cap, gently wipe away any fouling with a lens
cleaning tissue that has been moistened with water. Do not use organic
solvents to clean the Sensor Cap. Using an organic solvent to clean the
Sensor Cap may cause permanent damage to the cap. For example,
alcohol will dissolve the outer paint layer and other organic solvents
will likely dissolve the dye in the cap. Dissolving or scratching the paint
or dye layer will cause erratic dissolved oxygen measurements.
To disinfect the probe, soak the probe in 3% hydrogen peroxide for 15
to 30 minutes and then rinse it with clean water.

10
SENSOR CAP REPLACEMENT
The sensor cap should be replaced about once per year but may last
longer. It should also be replaced if it is cracked or damaged (see
Troubleshooting section for instructions on how to inspect the cap for
damage). The instruction sheet shipped with the replacement ODO
sensor cap includes the calibration coefficients specific to your sensor
cap.
The replacement ODO sensor cap is shipped in a humidified container.
The package should not be opened until ready for use. Once the sensor
cap has been installed on the sensor as described below, it is important
to keep the sensor in a 100% humid environment. Therefore, the
sensor should be stored in either the gray calibration/storage sleeve
with a moistened sponge or immersed in water, see Sensor Storage
for more information. If the sensor dries out, refer to the Rehydration
procedure in this manual.
Refer to Figure 7 below when following the instructions for replacing
the cap.
Figure 7
Caution: Avoid touching the sensing end of the sensor cap during the
following maintenance procedures.
1. Remove the old sensor cap assembly from the sensor by grasping
the probe body with one hand and then rotating the sensor cap
counterclockwise until it is completely free. Do not use any tools
for this procedure.
2. Inspect the o-ring on the probe for damage.If there is any indication
of damage, carefully remove the o-ring and replace it with the new
o-ring included with the replacement sensor cap. Do not use any
tools to remove the o-ring.

11
3. Ensure that the o-ring installed on the probe is clean. If necessary,
wipe clean with a lint free cloth or replace the o-ring as described
in the previous step.
4. Locate the o-ring lubricant included with the new sensor cap.
Apply a thin coat of o-ring lubricant to the installed o-ring. Remove
any excess o-ring lubricant from the o-ring and/or probe with a
lens cleaning tissue.
5. Remove the new sensor cap from its hydrated container and dry
the inside cavity of the sensor cap with lens cleaning tissue. Next,
clean the clear surface of the sensor on the end of the probe with
lens cleaning tissue.
6. Using clockwise motion, thread the new sensor cap onto the probe
assembly until it is finger-tight. The o-ring should be compressed
between the sensor cap and probe. Do not over-tighten the sensor
cap and do not use any tools for the installation process.
7. After installing the new sensor cap, store the sensor in the gray
calibration/storage sleeve with a moistened sponge.
8. Follow the procedures below for entering in the new sensor cap’s
coefficients into the EcoSense ODO200 instrument.
ENTERING SENSOR CAP COEFFICIENTS INTO THE ECOSENSE
ODO200
After installing a new sensor cap, connect the probe/cable assembly to
the instrument and turn the instrument on. Locate the Calibration Code
Label at the top of the instruction sheet and note the six numbers which
are listed as K1 through K5 and KC. These six numbers contain the
calibration code for this particular sensor cap. Follow these instructions
to enter the new calibration coefficients into your instrument:
1. Press and hold the CAP key for 3 seconds. The CAP key is located
in the lower left corner of the keypad.
2. The instrument will prompt for K1 and show 8 alpha/numeric
values with the first value blinking.
3. Use the up and down arrow keys to adjust the first value to match
the first value of the new cap’s K1. Press the Enter key to accept.
4. Continue using the up and down arrow keys to adjust all 8 alpha/
numeric values for K1 pressing the Enter key to confirm each entry.
5. After confirming the last value for K1, the instrument will prompt
you for K2. Follow the instructions in step 3 and 4 to enter and
confirm the value for K2. Continue with K3, K4 and K5.
6. After confirming K5, the EcoSense ODO200 will prompt you for KC.
KC has two values. Follow the instructions in step 3 and 4 to enter
the coefficients. After confirming KC, the instrument will return to
the measurement screen.

12
7. After entering the Sensor Cap Coefficients, perform a 1-point
calibration as described in the Calibration Section.
8. Press and hold the CAP key for 3 seconds at any time to exit and
cancel the cap coefficient update.
If errors are made in entering the Sensor Cap Coefficients, the
instrument will block the update and an error message will appear
on the display and the instrument will return to the K1 entry screen. If
you see this error message, re-enter the coefficients and check them
carefully for correct transcription from the Calibration Coefficient Label.
The coefficient values are hexadecimal.Due to the EcoSense ODO200’s
display, 6 and b look very similar. Hexadecimal values on the ODO200
will be displayed as: A, b, C, d, E, F, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
If you continue to get an error message after several entry attempts,
contact YSI Technical Support for assistance.
REHYDRATING THE SENSOR CAP
The Sensor Cap must remain in a moist environment; see Sensor
Storage for storage recommendations. If the sensor cap is allowed to
dry out, it is likely to drift slightly at the beginning of your next study
unless it is rehydrated. If the cap dries out, you can rehydrate it by
soaking the probe tip with the sensor cap installed in room temperature
tap water for 24 hours. After rehydration is complete, recalibrate and
be sure to store the probe in a moist environment.
SENSOR MAINTENANCE - TEMPERATURE
You must keep the temperature portion of the sensor free of build
up. Other than that, the sensor requires no maintenance. A soft bristle
brush, like a tooth brush can be used to scrub the temperature sensor
if needed.
SENSOR STORAGE
SHORT-TERM STORAGE
When the ODO sensor is not in use, store it in a moist environment.
For short-term storage (less than 30 days), moisten the sponge in the
calibration/storage sleeve with a small amount of clean water and place
this over the probe with the sensor cap and sensor guard installed. This
will provide a 100% saturated air environment.

13
LONG-TERM STORAGE
For long-term storage (>30 days), remove the battery from the
instrument. Moisten the sponge in the calibration/storage sleeve with
a small amount of clean water and place this over the probe with the
sensor cap and sensor guard installed. Inspect the sponge every 30
days to make sure it is still moist.
Alternatively, you can place the probe with sensor cap directly in a
beaker or other container of water, making sure that the water does
not evaporate over time.
TROUBLESHOOTING
Erroneous dissolved oxygen readings typically indicate a need to
clean the sensor cap, replace the sensor cap, and/or recalibrate the
instrument. First, clean the sensor cap following the instructions in
the Maintenance section and then perform a calibration. If erroneous
readings persist, inspect the sensor cap for damage (cracks, large
scratches in paint or dye layer), replace if necessary, enter new
coefficients and then attempt to recalibrate the instrument.
If the sensor cap is not damaged, try to rehydrate the sensor cap then
recalibrate.
If youarestillgettingerroneousdissolvedoxygen readings,try replacing
the sensor cap, enter the new coefficients and then recalibrate. If the
erroneous readings continue, contact YSI Technical Support to help
determine the next step.
Symptom Possible Solution
Instrument will not
turn on, the BAT
symbol displays
on the screen.
1. Low battery voltage, replace batteries.
2. Batteries installed incorrectly,
check battery polarity.
3. Return system for service.
Temperature values
display Over or
Undr on Run screen.
1. Sample temperature is less than 0° C or more
than +50°C. Increase or decrease the sample
temperature to bring within the allowable range.
2. Contact YSI Tech Support. Possible temperature
sensor failure.

14
Symptom Possible Solution
Instrument will
not calibrate
dissolved oxygen.
1. Verify calibration routine - correct
barometric pressure, salinity input,
and calibration environment.
2. Allow sufficient stabilization time for
dissolved oxygen and temperature.
3. Check sensor cap. Clean, rehydrate
or replace as necessary.
4. Contact YSI Tech Support.
DO readings are
inaccurate.
1. Verify temperature readings are accurate.
2. Sample temperature should be
between 0 and 45 ºC, the temperature
compensation range for DO mg/L.
3. DO sensor not properly calibrated,
recalibrate the sensor.
4. Check sensor cap. Clean, rehydrate or
replace as necessary. Recalibrate.
5. Contact YSI Tech Support.
Dissolved Oxygen
values display
Over or Undr on
Run screen.
1. Sample dissolved oxygen concentration
is more than 20 mg/L or 200%, or
less than 0.0 mg/L or 0.0%.
2. Verify temperature readings are accurate.
3. DO sensor not properly calibrated,
recalibrate the sensor.
4. Check sensor cap. Clean, rehydrate or
replace as necessary. Recalibrate.
5. Contact YSI Tech Support.
SPECIFICATIONS
These specifications represent typical performance and are subject to
change without notice. For the latest product specification information,
please visit YSI’s website at ysi.com or contact YSI Tech Support.
Parameter Range Resolution Accuracy
Temperature 0 to 50°C* 0.1°C ± 0.3°C
Dissolved
Oxygen
0.0 to 200%
air saturation
1% or 0.1%, user
selectable
± 1.5% of reading or
± 1.5% air saturation,
whichever is greater
0.00 to
20.0 mg/L
0.1 or 0.01 mg/L ± 1.5% of reading
or ± 1.5 mg/L,
whichever is greater
Barometer 500 to 1125
mBar
1.0 mBar manual entry

15
Parameter Range Resolution Accuracy
Temperature
Operating
Range
0 to 50ºC
Certifications RoHs, WEEE, CE, IP-67
Memory 50 data sets
Salinity 0 to 40 ppt, manual entry
Battery 9 volt alkaline, 100 hour battery life
in manual sampling mode
* Automatic dissolved oxygen temperature compensation range is 0
to 45°C

17
environmentally friendly way, reducing the amount of materials going
to landfills.
• Printed Circuit Boards are sent to facilities that process and reclaim
as much material for recycling as possible.
• Plastics enter a material recycling process and are not incinerated
or sent to landfills.
• Batteries are removed and sent to battery recyclers for dedicated
metals.
When the time comes for you to recycle, follow the easy steps outlined
at ysi.com.
APPENDIX A-DO% CALIBRATION
VALUES
Calibration
Value
Pressure
D.O. % in Hg mmHg kPa mbar
101% 30.22 767.6 102.34 1023.38
100% 29.92 760.0 101.33 1013.25
99% 29.62 752.4 100.31 1003.12
98% 29.32 744.8 99.30 992.99
97% 29.02 737.2 98.29 982.85
96% 28.72 729.6 97.27 972.72
95% 28.43 722.0 96.26 962.59
94% 28.13 714.4 95.25 952.46
93% 27.83 706.8 94.23 942.32
92% 27.53 699.2 93.22 932.19
91% 27.23 691.6 92.21 922.06
90% 26.93 684.0 91.19 911.93
89% 26.63 676.4 90.18 901.79
88% 26.33 668.8 89.17 891.66
87% 26.03 661.2 88.15 881.53
86% 25.73 653.6 87.14 871.40
85% 25.43 646.0 86.13 861.26
84% 25.13 638.4 85.11 851.13
83% 24.83 630.8 84.10 841.00