Apera DO850 User manual
- 1 -
DO850 Portable Optical Dissolved Oxygen Meter
Instruction Manual
- 2 -
Table&of&Contents&
1!Overview(..........................................................................................................................(-(3(-!
2!Technical(Specifications(.....................................................................................................(-(4(-!
3!Instructions(.......................................................................................................................(-(5(-!
3.1!LCD(Screen(.............................................................................................................................(-(5(-!
3.2!Keypads(.................................................................................................................................(-(5(-!
3.3!Batteries(................................................................................................................................(-(6(-!
3.4!Instrument(Socket(..................................................................................................................(-(6(-!
3.5!Reading(Stability(Mode(..........................................................................................................(-(7(-!
3.6!Auto(Lock(Mode(.....................................................................................................................(-(7(-!
3.7!Backlighting(...........................................................................................................................(-(7(-!
3.8!Automatic(Power-Off(.............................................................................................................(-(7(-!
4!Optical(Dissolved(Oxygen(Probe(........................................................................................(-(8(-!
4.1!Probe(Structure(......................................................................................................................(-(8(-!
4.2!Probe(Maintenance(................................................................................................................(-(8(-!
4.3!Sensor(Cap(.............................................................................................................................(-(9(-!
5!Preparation(for(Calibration(...............................................................................................(-(9(-!
5.1!Select(Dissolved(Oxygen(Units(................................................................................................(-(9(-!
5.2!Select(Temperature(Unit(.........................................................................................................(-(9(-!
5.3!Air(Pressure(Compensation(....................................................................................................(-(9(-!
5.4!Salinity(Compensation(..........................................................................................................(-(10(-!
6!Calibration(......................................................................................................................(-(10(-!
6.1!Saturated(Oxygen(Calibration(................................................................................................(-(10(-!
6.2!Zero-Oxygen(Calibration(........................................................................................................(-(10(-!
6.3!Special(Notes(for(Calibration(.................................................................................................(-(10(-!
7!Measurement(.................................................................................................................(-(11(-!
8!Parameter(Settings(.........................................................................................................(-(11(-!
9!Complete(Kit(...................................................................................................................(-(13(-!
10!Warranty(.....................................................................................................................(-(13(-!
11!Trouble(Shooting(.........................................................................................................(-(14(-!
12!Appendix(A:(D(O(%(C(A(L(I(B(R(A(T(I(O(N(VA(L(U(E(S(...............................................................(-(15(-!
13!Appendix(B:(Oxygen(Solubility(Table(............................................................................(-(15(-!
- 3 -
1 Overview
Thank you for purchasing Apera Instruments DO850 Portable Optical Dissolved Oxygen Meter.
DO850 measures dissolved oxygen in water using luminescence technology through an optical sensor
and display data with advanced intelligent instrumentation. Compared to electrochemical oxygen analyzer,
DO850 is more accurate and stable, easier to use and is the most cost-effective portable optical dissolved
oxygen meter.
Before you use the instrument, please carefully read the instruction manual to help you properly use and
maintain.
1.1 Luminescent optical sensor.
• Stability and Accuracy: Oxygen is not consumed during measurements. It is not affected by
sample flow rate, and thus provides a stable measurement.
• Easy to Use: No electrolytes and membrance are present in the meter; no warm-up;
frequent calibration is not necessary.
• Interference-Free: Sensor cap is coated with a light-shielding layer and minimizes the
impact from external light sources. The use of non-chemical sensors helps reduce a variety
of heavy metal ions interference in the aqueous environment, along with H2S and NH4 and
other chemical substances.
• Long service life. Other than mechanical deterioration (such as scratches light shielding
layer), the sensor cap has up to 8000 hours of service life.
• Easy to Calibrate and Maintain. Probe is equipped with calibration/storage sleeve, which
makes calibration and maintenance more convenient and reliable.
1.2 Advanced Intelligent Instrumentation
• automatic temperature compensation, automatic pressure compensation and manual salinity
compensation.
• clear display with white backlight large-size LCD.
• the reading-stable mode and automatic locking mode.
• meets IP57 waterproof rating; in addition, a standard instrument suitcase is provided.
Special Notes
•Sensor cap surface coating can not withstand high temperatures, so the
optical dissolved oxygen electrode can not test the water of more than
50 ℃℃.
•Sensor cap must be kept in a humid environment, if the surface coating is
dry, treat it by hydration, otherwise the measured value is unstable or the
response is slow, as described in section 4.2 (electrode storage)
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2 Technical Specifications
Dissolved
Oxygen
Dynamic Range
(0-200) %; (0-20.00) mg/L
Resolution
1%, 0.1mg/L (ppm)
Accuracy
±2% reading or ±2%saturation, whichever
is greater
±2%readin or ±0.2 mg/L, whichever is
greater
Response Time
≤30 s (25℃，90% response)
Calibration Points
Saturation Point & Zero Oxygen
Temperature Compensation
Automatic, (0 to 50)℃
Pressure Compensation
Automatic, (60 to 120) kPa
Salinity Compensation
Manual, (0 to 45) ppt
Temperature
Range
(0 to 50.0)℃
Resolution
0.1 ℃
Accuracy
±0.5℃
Other
Batteries
AA x 3 (1.5V×3)
IP Rating
IP57
Dimensions and Weight
Meter: 88×170×33 mm/313g
With case: 360×270×76 mm/1.3kg
Product Certificate
RoHs，CE & ISO9001︰2008
- 5 -
3 Instructions
3.1 LCD Screen
3.2 Keypads
①!
Measurement mode icon
⑦!
Temperature!Value/!symbol!
②!
Reading/Measured!Value!
⑧!
Auto!lock!icon!
③!
Symbol!
⑨!
Temperature!Compensation!
ATC!—!Auto!Temperature! !
Compensation!
MTC!—!Manual!Temperature!
Compensation!
④!
Units of Measurement!
⑤!
Temperature!unit!
⑩!
Reading!Stability!Icon!
⑥!
Symbol!
⑪!
Low Voltage Icon!
Fig.-2
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3.2.1 Key operation
Short press: key press time <2 s; long press: key press time> 2 s.
Power on: Press to turn on.
Shutdown: long press 2 seconds off.
Table - 1 Key operations and functions
Key
Operation
Functions
Short
Press
l In the shutdown mode: press the key to boot
l In measurement mode: Press to turn backlight on or off
Long
Press
l Press and hold for 2 seconds to turn off
Short
Press
l In measurement mode: key switch unit:% → mg / L or % →
ppm
Long
Press
l In the measurement mode: press the key for 2 seconds to
enter the calibration mode
Short
Press
l to cancel any operation, press to return to measurement
mode
Short
Press
l In the menu mode: Press the key to change the serial
number or select the parameter
Short
Press
l In the menu mode: Press the key to change the serial number
or select the parameter
Short
Press
l In measurement mode: Press to enter menu mode;
l In calibration mode: Press key to calibrate;
l In the menu mode: Press the key to confirm the parameter.
3.3 Batteries
The instrument uses three AA batteries, please use the LR6-type
alkaline batteries to ensure battery quality. Battery life> 200 hours
(no backlight). When the display appears Symbol, replace the
battery as shown in Figure -3.
3.4 Instrument Socket
The instrument uses an 8-pin socket that is protected by a gray rubber cap seal. When
inserting the Probe plug, please insert it after the notch position, and tighten the plug nut.
The end face of the socket and the plug connection has the sealing ring, which can
effectively keep the waterproof level of the socket.
Fig.-3
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3.5 Reading Stability Mode
When the measured value is stable, the LCD screen displays the
icon
as shown in Figure -4. If there is no icon or icon flashing,
indicating that the measured value is not stable, the measured
value should not be read or calibrated.
3.6 Auto Lock Mode
In parameter setting P4 you can select the auto-lock mode (Off-On,
factory default Off), select On to turn on automatic locking. When
the reading is stable for more than 10 seconds, the meter
automatically locks the measured value and displays the HOLD
icon, as shown in Figure 5. When auto locked, select to
unlock.
3.7 Backlighting
Instrument LCD screen has a white backlight, suitable for use in dimly lit environments.
Turning on the backlight will consume more power. The instrument is equpped with
automatic backlight and manual backlight mode. In automatic backlight mode, when the key
is pressed, backlight will be on for a minute then automatically shuts off; In manual
backlight mode, when the key is pressed, backlight will be on and will be off only is
pressed again. In the parameter setting P6, you can select the auto backlight mode (On-Off,
factory default On), select On to turn on auto backlight, select Off to turn off auto backlight,
and the instrument is manual backlight mode.
3.8 Automatic Power-Off
In the parameter setting P7, you can select the auto power off function (On-Off, factory
default On), select On to turn on auto power off, the instrument will shut down automatically
after 20 minutes, select Off to disable this function.
Fig.-4
Fig.-5
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4 Optical Dissolved Oxygen Probe
4.1 Probe Structure
The instrument DO803 optical dissolved oxygen probe which has a length 3m and built-in
temperature sensor, can achieve automatic temperature compensation. The electrode
structure is shown in Fig. 7
1. Bottom cover of the calibration sleeve
5. Locking cap
2. Sponge for water storage
6. Optical DO electrode
3. Sensor cap
7. O ring
4. Calibration sleeve
Immersion line: The tested solution should
be above this line
4.2 Probe Maintenance
The luminescent sensor cap of the optical DO electrode must be kept in a humid
environment. If the surface coating of the sensor cap is dry, the measured value will be
unstable or the response will be slow. The electrode calibration sleeve is used to store the
probe.
(A) Short-term storage (less than 30 days): The probe head is kept in the calibration sleeve.
Always keep the sponge inside the calibration sleeve slightly wet. Several drops of
clean water should be added to a dry sponge (let the sponge be saturated, but not
dripping), and tighten the lock cap, so that the sensor cap is kept in the moist-saturated
air.
(B) Long-term storage (greater than 30 days): The probe head is kept in the calibration
sleeve. Check whether the water storage sponge is moist every 30 days or user can
store the electrode in a water containing beaker.
(C) Before the first use, unscrew the calibration sleeve to check if the sponge is wet. If the
sponge is dry or if the electrode is exposed to dry air for more than 8 hours, the surface
coating of the sensor cap may be completely dry. So the electrode should be immersed
in tap water at room temperature 25 ℃ for 24 hours. If the water temperature is low,
soaking time is 48-72 hours.
(D) The sponge cannot get stained or moldy, otherwise it will consume or produce oxygen.
If stained or moldy, please clean the sponge or replace with a new one in time.
Fig.-7
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4.3 Sensor Cap
(A) The sensor cap is an important part of the optical DO probe. The surface coating of
the cap cannot be scratched or mechanically worn. Otherwise, the life of the sensor
cap will be reduced or the probe will be damaged. Please pay special attention to it
when using the probe.
(B) The surface coating of the sensor cap cannot withstand high temperatures, so the
optical DO probe can not be tested in water above 50 ℃.
(C) If the surface of the sensor cap is contaminated, please do not use alcohol and
organic solvents to clean, otherwise it may damage the probe. It can be gently wiped
with a soft cloth or paper towels. To disinfect the probe, immerse it in 3% hydrogen
peroxide for 15 to 30 minutes and then rinse off with water.
(D) The sensor cap has a service life of more than 8000 hours. When the probe is not
being used, it does not "bleach" luminescence layer; in addition, the storage time will
not reduce the life of the probe, so the actual use time of the sensor cap is far more
than a year. The major factor affecting the service life of the sensor cap is the surface
coating being damaged under external force. So the key is to protect the sensor cap
from external damage.
(E) If the sensor cap is damaged or deteriorated, users need to purchase a new one.
Every new cap has a set of calibration codes which need to be input into the
instrument. The specific input method will be described in the instruction manual of
sensor cap.
(F) The probe that comes with the instrument can be used directly without the input of
the calibration codes. So users should not take off the sensor cap when it is not in
use. Nor should one swap the caps from different instruments. When being installed,
the sensor cap must be tightened and the interior can not be contaminated or wet.
5 Preparation for Calibration
5.1 Select Dissolved Oxygen Units
Dissolved oxygen display units in two forms: mg / L and %, and ppm and %. Press to
switch mg / L →%, or ppm →%. Users can choose mg / L or ppm in parameter setting P1,
but only a percentage (DO%) is displayed for calibration.
5.2 Select Temperature Unit
The temperature unit can be selected in parameter setting P5: ° C or ° F.
5.3 Air Pressure Compensation
The instrument has automatic air pressure compensation function. The instrument has been
performed the air pressure calibration before it leaves the factory. So usually users do not
have to calibrate the air pressure. If necessary, calibrate it according to the value of the
standard barometer. Refer to parameter setting P3 for the procedure of barometric
calibration.
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5.4 Salinity Compensation
The instrument has manual salinity compensation. It is set in the parameter P2 (0 to 45 ppt).
To obtain accurate readings in mg / L and ppm, it is necessary to know the salinity of the
solution to be tested and input it into the instrument. As the salinity of the solution increases,
the level of DO decreases.
*Freshwater salinity is typically 0 to 0.5 ppt, salinity of sea water 35 ppt.
6 Calibration
6.1 Saturated Oxygen Calibration
(A) This procedure requires the use of a calibration sleeve to allow the probe to be
calibrated in a humidity-saturated atmosphere
(B) Check the sponge in the calibration sleeve, and make sure it is slightly wet. Attach
the calibration sleeve to the probe. Tighten the locking cap. Be careful not to have
water droplets on the head of the luminescent sensor cap. Wait for 5 to 10 minutes
after turning on the instrument so that the air in the calibration sleeve will be saturated
by water vapor. In addition, wait for the temperature to be completely stablized.
(C) Long press the key to enter the calibration mode, and the CAL is flashing in the
upper right corner of the LCD. Wait for the stable icon to appear and stay, press
the key to calibrate, once the instrument displays a stable 100%, it is ready to
use.
6.2 Zero-Oxygen Calibration
Zero-Oxygen calibration is only performed when a probe or sensor cap is replaced or the
probe has not been used for a long period. It is usually not necessary to conduct zero oxygen
calibration. The instrument is factory calibrated for zero oxygen, so it is not necessary to
perform a zero-oxygen calibration for the first time. Zero-oxygen calibration follow these
steps:
(A) preparation of 100ml of oxygen-free water: in the 100ml beaker weigh 2g
anhydrous sodium sulfite (Na2SO3) and add 100ml of pure water or tap water to
dissolve. Oxygen-free water is effective within 1 hour.
(B) Put the electrode into the oxygen-free water, wait for 3 to 5 minutes after the
instrument is turned on, and wait for the temperature and measured value to
completely stabilize. The measured value should be very low, 0.1mg / L or so.
(C) Long press to enter the calibration mode. The upper right corner of the LCD will
flash CAL. Wait for a stable icon. Press and the zero-oxygen calibration is
completed.
6.3 Special Notes for Calibration
(A) Optical dissolved oxygen probes have better stability and smaller calibration drift
compared to conventional galvanic or polaragraphic dissolved oxygen electrodes,
which means that the instrument can maintain its calibration data for a few months.
However, for better accuracy, it is recommended that the oxygen saturation
calibration be performed according to section 6.1 before use every day.
(B) Drying of the surface coating of the luminescent sensor cap can adversely affect the
stability of the measurement. Please pay special attention to this situation. See
Section 4.2 (Probe Maintenance) for details.
- 11 -
7 Measurement
When measuring, place the probe in your sample solution, swirl quickly in the solution for a
few seconds and rest it in order to remove bubbles from the measuring surface of the
sensor cap. The test solution must be above the immersion line of the probe. Note that
briefly shaking the probe in solution is only meant to eliminate potential bubbles on the
sensor cap. Not like the conventional galvanic or polaragraphic electrodes, the measuring
via optical dissolved oxygen probes does not require flowing liquid or constant stirring of
the solution.
Users can read the measured values when the icon appears and stays. Note that the
measurement time is related to temperature. When the solution’s temperature and the
probe’s temperature (determined by the temperature of the environment where the probe
is stored) are close, the measurement time is about one minute. When the solution’s
temperature and the probe’s temperature differ a lot, it takes about 3 minutes to reach a
stable reading. This is because the reading of dissolved oxygen is heavily influenced by
temperature, and the probe senses temperature much more slowly than dissolved oxygen.
8 Parameter Settings
8. Parameter Settings
8.1 Press the key in the measurement mode to enter the parameter setting mode (P1),
then press the key to switch the menu P1 → P2... → P7. See Table 2 for details.
Tab le-2 Parameter Setting List
Symbol
Parameter
Code
Content
P1
Dissolved oxygen
units
/
mg/L—ppm
P2
Salinity
Compensation
/
(0 to 45) ppt
P3
Air Pressure
Calibration
(60 to 1200 kPa
P4
Auto Lock
/
Off—On
P5
Tem p er atu re Un it
/
℃—℉
P6
Auto Backlight
On—Off
P7
Auto Power Off
On—Off
- 12 -
8.2 Parameter setting (press or to switch)
P1—Dissolved Oxygen Unit（mg/L—ppm）
1. In the measurement mode, press the key to enter P1 mode.
2. Press the key, mg / L flashes, press the key to select
mg / L → ppm, press to confirm.
3. Press to enter P2 mode, or press to return to
measurement mode.
P2—Salinity Compensation（0~45 ppt）
1. Press the key, 0 flashes
，
Press or key to adjust
salinity value (0 to 45 ppt), Press Key to confirm.
2. Press to enter P3 mode, or press to return to
measurement mode.
P3—Air Pressure Calibration (60 to 120 kPa)
1. Press the key, 101.3 flashes, according to standard pressure
value. Press or key to adjust, Press Key to confirm.
2. Press to enter P3 mode, or press to return to
measurement mode.
P4—Auto Lock（Off—On）
1. Press key, Off flashes，Press key to select Off→On，Press
key to confirm
Off—unlock；On—lock（If reading stays stable for more than
10seconds, it auto locks）。
2. Press key to enter P5 mode ，or key to return to
measurement mode.
P5— temperature unit（℃—℉）
1. Press key, ℃ flashes, Press key to select ℃→℉，Press
key to confirm.
2. Press key to enter P5 mode ，or key to return to
measurement mode.
P6—Auto Backlight（On—Off）
1. Press key, On flashes, Press key to select On→Off，
Press key to confirm。
2. Press key to enter P7 mode，or press key to return to
measurement mode.
On - Auto backlight on, Off - Auto backlight off.
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P7—Auto Power Off（On—Off）
1. Press key, On flashes，Press key to select On→Off，press
key to confirm。
2. press key to return to measurement mode.
On—auto power off on
，
Off—auto power off off
9 Complete Kit
9.1 What’s in the box
Content
Quantity
1.
DO850 Portable Optical Dissolved Oxygen Meter
1
2
DO803 Optical Dissolved Oxygen Probe
1
3
Probe Calibration Sleeve
1
4
Small Screwdriver
1
5
Carrying Case
1
6
Sponge for Water Storage (spare)
4
7
Instruction Manual
1
9.2 Accessories for separate purchase
Model
Name
DO803
Optical DO probe（3m cable，with sensor cap and
calibration sleeve）
DO810
Optical DO probe（10m cable, with sensor cap and
calibration sleeve）
DO8032
Sensor cap
DO8031
Calibration sleeve
10 Warranty
10.1 The warranty period of the DO850 instrument (only the instrument) is 3 years from
the date of purchase. That of DO803 optical DO probe (excluding sensor cap) is 2 years
from the date of purchase. That of DO8032 sensor cap is 1 year from the date of
purchase. If the above products or parts within the warranty period is not functional due
to raw material defects or poor manufacturing, they are free for repair or replace.
10.2 Damage and malfunction of the product caused by the following reasons are not
covered by the warranty:
- 14 -
(A) Fails to install, operate, or use the product in accordance with the instruction
manual, or if the product is damaged by abuse or incorrect use;
(B) The sensor cap is damaged by external force and can not work; or the electrode
cable is damaged or twisted due to external force;
(C) Fails to maintain the product in accordance with the requirements of this manual
and the industry standard process;
(D) Any unauthorized repairs, and the use of defective or incorrect components to
repair the product;
(E) Any modification of the product unauthorized by the Company.
10.3 Product Warranty Period is the free of charge service time for the user who
purchase the product, not the service life of the instrument or the probe.
11 Trouble Shooting
Error
Solutions
The instrument
does not turn on
1. The battery is not installed correctly. Check the polarity.
2. Battery low voltage, replace the battery.
3. Instrument freezes. Unplug the battery and then install.
The instrument can
not calibrate.
1. Check calibration procedure: correct atmospheric pressure,
salinity input and temperature.
2. The measured value is not stable, prolong the stabilization
time, until the demonstration then presses the key.
3. Check the sensor cap. If it is contaminated, it can be cleaned;
if dry, it can be hydrated; if damaged it can be replaced.
DO readings are
not accurate
1.Check whether the temperature is stable, the salinity input and
barometric pressure are accurate.
2. If the probe calibration is not good, recalibrate.
3. Check the sensor cap. If it is contaminated, it can be
cleaned; if dry, it can be hydrated; if damaged it can be replaced.
4. Unscrew the sensor cap, check whether there is moisture
inside, if so, wipe off, dry, and tighten it.
The display value
stays 200% or
20.0 mg / L. No
change
1. Check whether the concentration of the sample is higher than
200% or 20.0 mg / L (ppm).
2. Check if the temperature reading is accurate.
3. If the probe calibration is not good, recalibrate.
4. Check the sensor cap. If it is contaminated, it can be cleaned;
if dry, it can be hydrated; if damaged, it can be replaced.
- 15 -
12 Appendix A: D O % C A L I B R A T I O N VA L U E S
Temp(°C
(
Chlority:(0
(
Salinity:(0
(
5.0(ppt
(
9.0(ppt
(
10.0(ppt
(
18.1(ppt
(
15.0(ppt
(
27.1(ppt
(
20.0(ppt
(
36.1(ppt
(
25.0(ppt
(
45.2(ppt
(
0.0!
14.62!
13.73!
12.89!
12.10!
11.36!
10.66!
1.0!
14.22!
13.36!
12.55!
11.78!
11.07!
10.39!
2.0!
13.83!
13.00!
12.22!
11.48!
10.79!
10.14!
3.0!
13.46!
12.66!
11.91!
11.20!
10.53!
9.90!
4.0!
13.11!
12.34!
11.61!
10.92!
10.27!
9.66!
5.0!
12.77!
12.02!
11.32!
10.66!
10.03!
9.44!
6.0!
12.45!
11.73!
11.05!
10.40!
9.80!
9.23!
7.0!
12.14!
11.44!
10.78!
10.16!
9.58!
9.02!
8.0!
11.84!
11.17!
10.53!
9.93!
9.36!
8.83!
9.0!
11.56!
10.91!
10.29!
9.71!
9.16!
8.64!
10.0!
11.29!
10.66!
10.06!
9.49!
8.96!
8.45!
11.0!
11.03!
10.42!
9.84!
9.29!
8.77!
8.28!
12.0!
10.78!
10.18!
9.62!
9.09!
8.59!
8.11!
13.0!
10.54!
9.96!
9.42!
8.90!
8.41!
7.95!
14.0!
10.31!
9.75!
9.22!
8.72!
8.24!
7.79!
15.0!
10.08!
9.54!
9.03!
8.54!
8.08!
7.64!
16.0!
9.87!
9.34!
8.84!
8.37!
7.92!
7.50!
17.0!
9.67!
9.15!
8.67!
8.21!
7.77!
7.36!
18.0!
9.47!
8.97!
8.50!
8.05!
7.62!
7.22!
19.0!
9.28!
8.79!
8.33!
7.90!
7.48!
7.09!
20.0!
9.09!
8.62!
8.17!
7.75!
7.35!
6.96!
21.0!
8.92!
8.46!
8.02!
7.61!
7.21!
6.84!
22.0!
8.74!
8.30!
7.87!
7.47!
7.09!
6.72!
23.0!
8.58!
8.14!
7.73!
7.34!
6.96!
6.61!
24.0!
8.42!
7.99!
7.59!
7.21!
6.84!
6.50!
25.0!
8.26!
7.85!
7.46!
7.08!
6.72!
6.39!
26.0!
8.11!
7.71!
7.33!
6.96!
6.62!
6.28!
27.0!
7.97!
7.58!
7.20!
6.85!
6.51!
6.18!
28.0!
7.83!
7.44!
7.08!
6.73!
6.40!
6.09!
29.0!
7.69!
7.32!
6.93!
6.62!
6.30!
5.99!
30.0!
7.56!
7.19!
6.85!
6.51!
6.20!
5.90!
31.0!
7.43!
7.07!
6.73!
6.41!
6.10!
5.81!
32.0!
7.31!
6.96!
6.62!
6.31!
6.01!
5.72!
33.0!
7.18!
6.84!
6.52!
6.21!
5.91!
5.63!
34.0!
7.07!
6.73!
6.42!
6.11!
5.82!
5.55!
35.0!
6.95!
6.62!
6.31!
6.02!
5.73!
5.46!
36.0!
6.84!
6.52!
6.22!
5.93!
5.65!
5.38!
37.0!
6.73!
6.42!
6.12!
5.84!
5.56!
5.31!
38.0!
6.62!
6.32!
6.03!
5.75!
5.48!
5.23!
39.0!
6.52!
6.22!
5.98!
5.66!
5.40!
5.15!
40.0!
6.41!
6.12!
5.84!
5.58!
5.32!
5.08!
41.0!
6.31!
6.03!
5.75!
5.49!
5.24!
5.01!
42.0!
6.21!
5.93!
5.67!
5.41!
5.17!
4.93!
43.0!
6.12!
5.84!
5.58!
5.33!
5.09!
4.86!
44.0!
6.02!
5.75!
5.50!
5.25!
5.02!
4.79!
45.0!
5.93!
5.67!
5.41!
5.17!
4.94!
4.72!
13 Appendix B: Oxygen Solubility Table
Solubility of Oxygen in mg/L in Water Exposed to Water-Saturated Air at 760 mm Hg Pressure.
Salinity = Measure of quantity of dissolved salts in water.
Chlorinity = Measure of chloride content, by mass, of water.
S(0/00) = 1.80655 x Chlorinity (0/00)
- 16 -
Calibra
tion
value
Pressure
Calibrat
ion
value
Pressure
D.O. %
in Hg
mmHg
kPa
D.O. %
in Hg
mmHg
kPa
D.O. %
in Hg
101%
30.22
767.6
102.34
101%
30.22
767.6
102.34
101%
30.22
100%
29.92
760.0
101.33
100%
29.92
760.0
101.33
100%
29.92
99%
29.62
752.4
100.31
99%
29.62
752.4
100.31
99%
29.62
98%
29.32
744.8
99.30
98%
29.32
744.8
99.30
98%
29.32
97%
29.02
737.2
98.29
97%
29.02
737.2
98.29
97%
29.02
96%
28.72
729.6
97.27
96%
28.72
729.6
97.27
96%
28.72
95%
28.43
722.0
96.26
95%
28.43
722.0
96.26
95%
28.43
94%
28.13
714.4
95.25
94%
28.13
714.4
95.25
94%
28.13
93%
27.83
706.8
94.23
93%
27.83
706.8
94.23
93%
27.83
92%
27.53
699.2
93.22
92%
27.53
699.2
93.22
92%
27.53
91%
27.23
691.6
92.21
91%
27.23
691.6
92.21
91%
27.23
90%
26.93
684.0
91.19
90%
26.93
684.0
91.19
90%
26.93
89%
26.63
676.4
90.18
89%
26.63
676.4
90.18
89%
26.63
88%
26.33
668.8
89.17
88%
26.33
668.8
89.17
88%
26.33
87%
26.03
661.2
88.15
87%
26.03
661.2
88.15
87%
26.03
86%
25.73
653.6
87.14
86%
25.73
653.6
87.14
86%
25.73
APERA INSTRUMENTS, LLC
Address: 977 Old Henderson Rd, Columbus Ohio 43220
Tel : 1 -614-285-3080
Email: info@aperainst.com
Website: www.aperainst.com
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