APERA DO8500 Portable Optical Dissolved Oxygen Meter Instruction Manual
- June 3, 2024
- APERA
Table of Contents
DO8500 Portable Optical Dissolved Oxygen Meter
DO8500
Portable Optical Dissolved Oxygen Meter Instruction Manual
APERA INSTRUMENTS (Europe) GmbH
www.aperainst.de
v1.2 – 1 –
Table of Contents
1 Overview………………………………………………………………………………………………………………- 3 1.1 Luminescent
optical sensor. ………………………………………………………………………………- 3 1.2 Intelligent
Instrumentation………………………………………………………………………………….- 3 –
2 Technical Specifications ………………………………………………………………………………………….- 4 3
Instructions …………………………………………………………………………………………………………..- 5 –
3.1 LCD Screen…………………………………………………………………………………………………….- 5 3.2 Key Operation
…………………………………………………………………………………………………- 6 3.3 Batteries
…………………………………………………………………………………………………………- 7 3.4 Instrument Socket
……………………………………………………………………………………………- 7 3.5 Display
mode…………………………………………………………………………………………………..- 7 3.6 Data storage, recall, and
clear. …………………………………………………………………………..- 8 3.7 Backlighting
…………………………………………………………………………………………………….- 8 3.8 Automatic Power-Off
………………………………………………………………………………………..- 8 4 Optical Dissolved Oxygen
Probe………………………………………………………………………………- 9 4.1 Probe Structure
……………………………………………………………………………………………….- 9 4.2 Probe Maintenance
………………………………………………………………………………………….- 9 4.3 Sensor Cap
…………………………………………………………………………………………………..- 10 5 Preparation for Calibration
…………………………………………………………………………………….- 10 5.1 Dissolved Oxygen Units Selection
…………………………………………………………………….- 10 5.2 Resolution
Selection………………………………………………………………………………………. – 11 5.3 Temperature Unit
Selection …………………………………………………………………………….. – 11 5.4 Air Pressure Compensation
…………………………………………………………………………….. – 11 5.5 Salinity Compensation
……………………………………………………………………………………. – 11 6
Calibration…………………………………………………………………………………………………………..- 12 6.1 Saturated Oxygen
Calibration…………………………………………………………………………..- 12 6.2 Zero-Oxygen Calibration
…………………………………………………………………………………- 12 6.3 Special Notes for Calibration
……………………………………………………………………………- 13 7 Measurement
………………………………………………………………………………………………………- 13 8 Parameter Settings
………………………………………………………………………………………………- 14 9 USB
Communication…………………………………………………………………………………………….- 17 10 Complete Kit
……………………………………………………………………………………………………….- 19 10.1 What’s in the
box……………………………………………………………………………………………- 19 10.2 Accessories for separate
purchase……………………………………………………………………- 19 11
Warranty……………………………………………………………………………………………………………….- 20 12 Trouble
Shooting……………………………………………………………………………………………………- 21 11 Appendix A: Oxygen
Solubility Table (760mm Hg)……………………………………………………..- 22 12 Appendix B: DO %
Calibration Values……………………………………………………………………..- 23 –
– 2 –
1 Overview
Thank you for purchasing Apera Instruments DO8500 Portable Optical Dissolved
Oxygen Meter. The DO8500 measures dissolved oxygen in water using luminescence
technology through an optical sensor and displays data with intelligent
instrumentation. Compared to conventional electrochemical dissolved oxygen
meter, the DO8500 is more accurate and stable, and easier to use.
Before you use the instrument, please carefully read the instruction manual to
help you properly perform tests and maintainenance.
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 membranes are present
in the meter; no warm-up required; 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 to the
light shielding layer), the sensor cap has up to 8000 hours of service life.
Easy to calibrate and maintain. Probe is equipped with a calibration/storage
sleeve, which makes calibration and maintenance more convenient and reliable.
1.2 Intelligent Instrumentation Built-in microprocessor chip, featured with
Auto. Temperature Compensation, Auto. Air Pressure Compensation, Auto.
Salinity Compensation and parameter setting, auto. power off, and low power
indication. Meter meets with the requirement of international GLP standards,
clock display, manual storage and automatic timing storage. USB data output.
Stable reading and automatic locking modes available. Clear large-size LCD
display with white backlight. Meets IP57 waterproof rating; In addition, a
rugged 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 . When the
electrode is not in use, it should be kept in the storage sleeve, and
keep the sponge in moist, so that the fluorescent cap will not dry out. If the
sponge is dry out or the probe is exposed in dry air for more than 8 hours,
soak the electrode in tap water for 24~48 hours (see article 4.2), otherwise
it may cause unstable measurements or slow response. Before get readings or
perform other operations, wait about 30 seconds after meter is powered on.
– 3 –
2 Technical Specifications Dynamic Range Resolution
Accuracy
Dissolved Oxygen
Response Time
Calibration Points
Temperature Compensation
Pressure Compensation
Salinity Compensation
Range
Temperature
Resolution
Accuracy
Data Storage
Output
Other
Batteries IP Rating
Dimensions and Weight
Product Certificate
(0-20.00) mg/L (ppm), (0-200.0)% 0.01/0.1mg/L (ppm), 0.1/1%
±2% reading or ±0.2 mg/L, whichever is greater
±2% reading or ±2% saturation, whichever is greater
30 s (25 , 90% response) Saturation Point & Zero Oxygen
Automatic, (0 to 50) Automatic, (60 to 120) kPa Manual or automatic, (0 to 45)
ppt
(0 to 50.0) 0.1 ±0.5
500 groups (with time and date) USB
AA x 3 (1.5V×3) IP57
Meter: 88×170×33 mm/313g With case: 360×270×76 mm/1.3kg
RoHs, CE & ISO9001:2015
– 4 –
3 Instructions 3.1 LCD Screen
Fig.-1
Measurement mode
Serial number of storage and prompts of special display mode
Reading/Measured Value
M+ — Measurement to be stored RM — Reading to be recalled
Timing storage
Temperature value and prompts of special display mode
Date.time and prompts of special display mode
Automatic reading lock-up
Units of date and time
ATC–Auto temperature compensation MTC–Manual temperature compensation
Units of measurement
Stability icon of readings
Units of temperature
USB communication
Units during calibration
Low power indication
– 5 –
3.2 Key Operation
Fig.-2
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.
First time use: see parameter setting P4.7 & P4.8 to set correct date and time (as Clause 8.3) Special notes: Before get readings or do other operations, wait about 30 seconds after meter powered on.
Table – 1 Key operation and functions
Key Operation
Functions
Short Press
When powered off, press the key to power on In measurement mode: press to turn backlight on or off
Long Press Press and hold for 2 seconds to turn off
Short Press Long Press Short Press Short Press
In measurement mode: press the key to switch unit: %mg/L or %ppm
In the measurement mode: press the key for 2 seconds to enter the calibration
mode
To cancel any operation, press to return to measurement mode In measurement
mode: press to enter menu mode; In calibration mode: press key to calibrate;
In the menu mode: press key to confirm the parameter.
In measurement mode: press
key to change the serial
Short Press or
Long Press
number or press
to recall the measurement value.
In recall mode(RM), short press to change serial number of
stored measurement value, or long press to conduct rapidly
change; In the menu mode:press the key to change the serial number or
select the parameter
– 6 –
3.3 Batteries The instrument uses three AA alkaline batteries. Battery life > 200 hours (without backlight). When the display shows symbol as shown in Figure-3, replace the battery.
3.4 Instrument Socket
The instrument socket protected by grey rubber sealing cap, as shown in
Figure-4. Eight-pin socket (right) – connect DO electrode. 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 maintain the waterproof protection of the socket. BNC
socket (left) – connect salinity electrode RCA socket (middle) – connect
temperature probe
3.5 Display mode
3.5.1 Main Display Screen If the salinity probe is not connected or salinity is lower than 1ppt, only
the DO value and temp value will be displayed on the LCD screen as shown in Figure-5, DO value: 8.18mg/L; temp. value: 25.2.
When salinity probe is connected and salinity is higher than 1ppt,
salinity will be displayed on right bottom of the LCD screen, as shown
in Figure-6,DO value: 6.97mg/L, Temp value: 25.2; Salinity: 32ppt,
Press
key to switch beteen unit of mg/L%. Or select unit of
mg/L or ppm
in parameter setting P3.1, time displays on top right of LCD screen.
3.5.2 Reading Stability Mode
When the measured value is stable, the LCD screen displays the icon as shown
in Figure-7. If there is no icon or icon flashing,
indicates that the measured value is not stable, the measured value should not
be read or calibrated.
3.5.3 Auto Lock Mode
In parameter setting P4.3 you can select the auto-lock mode (Off-On) ,
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 – 8.When auto
locked, press
to unlock. Select Off to turn off automatic locking.
– 7 –
Fig.-3 Fig.-4
Fig.-5 Fig.-6
Fig.-7 Fig.-8
3.6 Data storage, recall, and clear.
3.6.1 Manual storage
When the measurement is stable, press key, the meter will store
measureent value, M+ icon and storage serial number will be displayed
on botton right of LCD sreen, as shown in Figure-9. First group of data
was stored.If connect salinity probe, press
key, M+ icon and
storage serial number will be displayed for 2 seconds, then salinity
displays on LCD screen continously. As shown in Figure-6
Fig.-9
3.6.2 Automatic timing storage
Set the storage timing (e.g. 3 minutes) from parameter P4.1, icon displays on
LCD screen, the meter enters the timing storage mode. When press key, icon
flashes and the first measuring value is stored. After 3 minutes, the 2nd
measuring value is stored automaticly. See Figure-10 the meter stores eight
measuring values automatically. When press key, icon stops flashing and the
meter stops automatic storage. In automatic storage mode, manual storage does
not work. Set time 0 in parameter P4.1 to exit from the automatic storage
mode.
Fig.-10
3.6.3 Recall stored value
In the measurement mode, press key to recall the last stored measured value.
See Figure 11: Pressing key or key to change the recalled measuring value.
Press and hold
key or key to change the recalled measuring value quickly.
3.6.4 Clear stored value Select YES in parameter P4.4 to clear all stored value.
Fig.-11
3.7 Backlighting
The Instruments LCD screen has a white backlight suitable for use in dimly lit environments.
Turning on the backlight will consume more power. There`s two backlighting mode. On and
Off, you can select in the parameter setting P4.5. Select On, press backlight will be on
for a minute then automatically shuts off. Select Off, when the key
is pressed, backlight
will be on and will be off only when is pressed again.
3.8 Automatic Power-Off
In the parameter setting P4.6, you can set the auto power off function (On-
Off), select On to turn on auto power off function, the instrument will shut
down automatically if no operation within 20 minutes, select Off to disable
this function.
– 8 –
4 Optical Dissolved Oxygen Probe
4.1 Probe Structure The instruments DO803 optical dissolved oxygen probe has a
cable length of 3m and a builtin temperature sensor for automatic temperature
compensation. The electrode structure is as shown in Figure.-12
Fig.-12
1. Bottom cover of the calibration sleeve 2. Sponge for water storage 3.
Sensor cap
4. Calibration/Storage sleeve
5. Locking cap 6. Optical DO electrode 7. O ring
Immersion line: The test sample should be above this line
4.2 Probe Maintenance The sensor cap of the optical DO electrode must be kept
in a moist environment. If the surface coating of the sensor cap dries out,
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 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 moistsaturated 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 beaker containing water.
(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
– 9 –
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 can not be allowed to get stained or moldy, otherwise it will
consume or produce oxygen. If stained or moldy, please replace it immediately.
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 Dissolved Oxygen Units Selection Dissolved oxygen units displays in two
forms: mg / L and %, and ppm and %. Press to switch between mg / L %, or ppm
%. Users can choose mg / L or ppm in parameter setting P3.1, but only a
percentage (DO%) is displayed in probe calibration.
– 10 –
5.2 Resolution Selection The resolution unit can be selected in parameter
setting P3.2: 0.01 or 0.1mg/L (ppm), After setting, the meter will display
resolution of 0.1 or 1 in according to %.
5.3 Temperature Unit Selection The temperature unit can be selected in
parameter setting P4.2: or .
5.4 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 generally users do not have to calibrate the air pressure. If
necessary, calibrate it according to standard value measured by aneroid
barometer. Refer to parameter setting P3.5 for the procedure of aneroid
barometer calibration.
5.5 Salinity Compensation
Generally, salinity of freshwater is 0 to 0.5ppt, salinity of seawater is
35ppt. As the salinity of the solution increases, the level of DO decreases.
Refer to parameter setting P3.3, for selection of auto salinity compensation
or manual salinity compensation. If manual salinity compensation selected in
P3.3, please enter the parameter setting P3.4 to input salinity value (see
clause 5.5.1); if auto salinity compensation selected, should connect the
salinity electrode, then conduct calibration in parameter setting P3.4 (see
clause 5.5.2).
5.5.1 Manual salinity compensation (Hnd) (A) In parameter setting P3.3, select
manual salinity compensation
(Hnd). Operation refers to P3.3. (B) In parameter setting P3.4, input salinity
value (0~45ppt),
Operation refers to P3.4. (C) Connect DO electrode to conduct measurement.
5.5.2 Auto salinity compensation (Aut)
(A) Connect salinity electrode to meter;
(B) Switch parameter setting to P3.3, select auto salinity
compensation (Aut), Operation refers to P3.3.
(C) Switch parameter setting to P3.4, press
to enter salinity
calibration mode. Submerge the salinity electrode in
12.88mS/cm conductivity calibration solution, stir gentlely and
allow it to stay in the calibration solution for a while. When the
Fig.-13
– 11 –
reading is stable and
displays on the LCD, press
key to calibrate, LCD
displays correct salinity value (the calibration procedure refer to Figure 13). Press key to return to the measurement mode.
Special notes:
(A) Use 12.88mS/cm conductivity calibration solution to calibrate salinity. If the the standard
solution is wrong, Err icon will be flashing at the bottom right of LCD if
is pressed,
indicating invalid calibration.
(B) Since salinity calibration is done by factory before delivery, so it is
not necessary to perform salinity calibration during initial use. Only make
salinity calibration when replace with a new electrode, or when the electrode
is unused for a long time.
(C) For auto salinity compensation, salinity probe must be connected, As shown
in figure-14. Users can fit DO probe and salinity probe together into the clip
to measure simultaneously.
Fig.-14
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 that the sponge in the calibration sleeve is wet. Attach the
calibration sleeve to the probe. Tighten the locking cap. Be careful not to
have water droplets on the head of the cap. Wait for 5 to 10 minutes after
turning on the instrument. Saturate the air in the calibration sleeve with
water vapor. In addition, wait for the temperature to completely stablize.
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. Zero-
Oxygen calibration is done by factory before shipment, so it is not necessary
to perform a zero-oxygen calibration during initial use. Zero-oxygen
calibration should follow these steps:
– 12 –
(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) Please note that the closer the
temperature of the sample solution to the calibration
solution, the more accurate readings. So it is recommended that the oxygen
saturation calibration to be performed according to section 6.1 before use
every day. (B) Drying of the surface coating of the 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. (C) The instrument
has factory default setting function, select YES in parameter setting P3.6,
the meter will be calibrated to the theory value.
7 Measurement
7.1 When measuring, place the probe in sample solution, stir quickly in the
solution for a few seconds and rest it to remove bubbles from the measuring
surface of the sensor cap. The solution must be above the immersion line of
the probe. Note that brief shaking the probe in solution is only to eliminate
bubbles. Not like conventional electrochemical electrodes, the measuring via
optical dissolved oxygen probes does not require constant stirring of the
solution or flowing fluid.
7.2 Users can read the measured values when the icon appears and stays. Note
that the measurement time is related to temperature. When the solution
temperature and the probe temperature is close, it takes about one minute to
get the readings stablized. When the solution temperature and the electrode
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.
– 13 –
8 Parameter Settings
Press the press the P3.1, press P4.1,press
key in the measurement mode to enter the parameter setting mode P3.0,
key to switch the menu P3.0 P4.0; In P3.0 mode, press
to enter
to switch submenu P3.1P3.6; In P4.0 mode, press
to enter
to switch submenu P4.1P4.8. See Table 2 for details.
Menu Submenu
P3.1
P3.0 DO parameter
P3.2 P3.3 P3.4
P3.5
P3.6
P4.1
P4.2
P4.3
P4.0 Basic parameter
P4.4 P4.5
P4.6
P4.7
P4.8
Table-2 Parameter Setting List
Parameter
Code
DO Units Selection
/
Resolution Selection
/
Salinity Compensation Mode
/
Salinity Compensation
/
Air Pressure Calibration
Back to Factory Default
Timing Storage
/
Temp. Unit Selection
/
Auto Lock
/
Clear Storage
Auto Backlight
Auto Power Off
Adjust Date
/
Adjust Time
/
Content mg/L–ppm
0.01/0.1 mg/L(ppm)
Aut–Hnd
(0 to 45) ppt (60 to 120) kPa
No–Yes 0:00
—
Off–On No–Yes
On–Off On–Off
/ /
– 14 –
DO Parameter setting (press or to switch)
P3.1–Dissolved Oxygen Unit (mg/L–ppm)
1. In P3.0 mode, press the
key to enter P3.1 mode.
2. Press the
key, mg / L flashes, press the
mg/L ppm, press
to confirm.
key to select
3. Press
to enter P3.2 mode, or press
measurement mode.
to return to
P3.2–Resolution (0.01-0.1mg/L)
1.Press the
key, 0.01 flashes, press the
resolution (0.01-0.1mg/L), press
to confirm.
key to select
2. Press
to enter P3.3 mode, or press
measurement mode.
to return to
P3.3–Salinity Compensation Mode (Aut-Hnd)
1. Press the
key, Aut flashes.Press
to select auto salinity
compensation (Aut) or manual salinity compensation(Hnd),Press
key to confirm.
2. Press
to enter P3.4 mode,or press
measurement mode.
to return to
P3.4–Salinity Compensation (0~45 ppt) 1. Press the key to input salinity
value, when manual salinity
compensation selected in P3.3, operation refers to clause 5.5.1. 2. Press the
key to enter salinity calibration mode, when auto
salinity compensation was selected in P3.3, operation refers to clause 5.5.2
P3.5–Air Pressure Calibration (60 to 120 kPa) 1. Press the key, 101.3 flashes,
according to standard pressure
value of aneroid barometer. Press or key to adjust, Press key to confirm. 2.
Press to enter P3.6 mode, or press to return to measurement mode.
P3.6–Back to Factory Default (No–Yes)
Press
key, No flashes, Press
key to select No Yes,
Press key to confirm. Meter returns to measurement mode.
No–cancel restore. Yes–restore
– 15 –
Basic Parameter setting (press or
to switch)
P4.1–Adjust timing storage time
1. In P4.0 mode, Press
key to enter P4.1 mode.
2. Press
key,”00″ flashes, Press
or
key to adjust
minute (0~59); Press
key,”0″ flashes,Press
or to
adjust hour (0~99), Press
key to confirm;
3. Press key to enter P4.2 mode, or measurement mode.
key to return to
P4.2– temperature unit (–)
1. Press
key, flashes, Press
key to select , Press
key to confirm.
2. Press key to enter P4.3 mode, or measurement mode.
key to return to
P4.3–Auto Lock (Off–On)
1. Press
key, Off flashes,Press
key to select OffOn,
Press
key to confirm.
Off–turn off lock function; On–turn on lock function (If reading stays stable for more than 10 seconds, it auto locks).
2. Press key to enter P4.4 mode, or measurement mode.
key to return to
P4.4. Clear all the stored value No–Yes
1. Press
key, ” No ” flashes, then press
key to select
between No–Yes, press
key to confirm
No: not delete, Yes: delete.
2. After confirm the parameter, press
to enter in P4.5 mode or
press
key to return to the measurement mode.
P4.5–Auto Backlight (On–Off)
1. Press
key, On flashes, Press
key to select OnOff,
Press
key to confirm.
On turn on auto backlight off function, Off turn off auto backlight off function.
2. Press
key to enter P4.6 mode, or press
measurement mode.
key to return to
– 16 –
P4.6–Auto Power Off (On–Off)
1. Press
key, On flashesPress
key to select OnOff
press
key to confirm.
On–turn on auto power off function Off–turn off auto power off function.
2. Press
key to enter P4.7 mode, or press
key to return to
measurement mode.
P4.7. Adjust date
1. Press
key, “Month” flashes, then press
key, “Date”
flashes, then press
key, “Year” flashes. When the number
flashes, press
key or
key to adjust date, then press
key to confirm.
2. Press
key to enter in P4.8 mode or press
key to return
to the measurement mode.
P4.8. Adjust time
1. Press
key, “15” flashes, then press
key, “06” flashes.
When the number flashes, press
key and
key to adjust
time, and then press
to confirm.
2. After confirm the parameter, press measurement mode.
key to to return to the
9 USB Communication
The meter uses “PC-Link” software with USB communication function. The port is
USB. Software interface (as shown in Figure 15.) –Stored value display area
(a) Press “Download” to download the data from the meter to the computer,
measuring date.time.value and temperature and so on. (b) Connect meter to
computer, then press key, or set the timing sorage function, The measuring
information will be displayed on the computer through USB, and will not be
stored in the meter as shown in Figure 15. — Mode and Serial Number —
Parameter setting information — Port type and press key
– 17 –
The port number is software connected to computer, each computer recognizes
different port number, as shown in Figure 15, the port number is COM3.
Open/Close — press this key to turn on or off software, Icon indicates that
software is activated. Refresh — press this key to reset COM port to COM1
SyncTime — press this key to set time of meter same with computer. Download —
press this key to download the data from the meter to the computer, Clear —
press this key to clear all the stored value. Export — press this key to
export the stored value to Microsoft Excel file. Exit — press this key, PC-
Link program exists from the computer interface.
Fig.-15 9.2. Run software Load PC-Link to the computer, open “PC-Link” file,
which inclucing PCLink software file and driver Compressor file, Generally,
open PCLlink file directly. If the meter can`t be connected to software,
please install USB driver firstly. 9.3. Connection port selection Connect USB
cable to the meter and the computer, open PC-Link program, program interface
shows in computure, press the arrow icon next to COM1, then pres Open key, LCD
will displays , or please confirm the port number in ” device manager” of the
computer. 9.4. Software operation 9.1.1 Upload the stored value Press
“Download” key, all the data stored in the meter is downloaded to the
computer. The
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data will be listed by category.
9.1.2 Storage during operation
(a) During operation, press
key to store or set timing storage. The measuring
information is downloaded to the computer through USB and will not be stored in the meter.
(b) The stored mode and unit during operation is same as the data shown on the meter.
press to change.
9.1.3 Data processing Press “Export” key to export the stored value to Microsoft Excel file and then analyze or print the stored data.
10 Complete Kit
10.1 What’s in the box Content
1. DO8500 Portable Optical Dissolved Oxygen Meter 2 DO803 Optical Dissolved
Oxygen Probe 3 Probe Calibration/storge sleeve 4 Conductivity Electrode
2301-3M 5 PC-Link Communication Software disk 6 USB Communication Cable 7
Combined electrode clip 8 Small Screwdriver 9 Carrying Case 10 Sponge for
Water Storage (spare) 11 Instruction Manual 10.2 Accessories for separate
purchase
Quantity 1 1 1 1 1 1 1 1 1 4 1
Model DO803
Name Optical DO probe (3m cablewith sensor cap and calibration sleeve)
DO810 Optical DO probe (10m cable, with sensor cap and calibration sleeve)
DO8032 Sensor cap
DO8031 Calibration/Storage sleeve
– 19 –
11 Warranty 11.1 We warrant this instrument to be free from defects in
material and workmanship and agree to repair or replace free of charge, at
option of APERA INSTRUMENTS (Europe) GmbH, any malfunctioned or damaged
product attributable to responsibility of APERA INSTRUMENTS (Europe) GmbH for
a period of 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. 11.2 Damage and malfunction of
the product caused by the following reasons are not covered by the warranty:
(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. 11.3
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.
– 20 –
12 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.
1. Check calibration procedure: correct atmospheric pressure,
salinity input and temperature.
The instrument can 2. The measured value is not stable, prolong the stabilization
not calibrate
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.
1.Check whether the temperature is stable, the salinity input and
barometric pressure are accurate.
2. If the probe calibration is not good, recalibrate.
DO readings are not 3. Check the sensor cap. If it is contaminated, it can be cleaned;
accurate
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.
– 21 –
11 Appendix A: Oxygen Solubility Table (760mm Hg)
Temp °C
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0
17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0
32.0 33.0 34.0 35.0 36.0 37.0 38.0 39.0 40.0 41.0 42.0 43.0 44.0 45.0
Chlority: 0 Salinity: 0
14.62 14.22 13.83 13.46 13.11 12.77 12.45 12.14 11.84 11.56 11.29 11.03 10.78
10.54 10.31 10.08 9.87 9.67 9.47 9.28 9.09 8.92 8.74 8.58 8.42 8.26 8.11 7.97
7.83 7.69 7.56 7.43 7.31 7.18 7.07 6.95 6.84 6.73 6.62 6.52 6.41 6.31 6.21
6.12 6.02 5.93
5.0 ppt 9.0 ppt
13.73 13.36 13.00 12.66 12.34 12.02 11.73 11.44 11.17 10.91 10.66 10.42 10.18
9.96 9.75 9.54 9.34 9.15 8.97 8.79 8.62 8.46 8.30 8.14 7.99 7.85 7.71 7.58
7.44 7.32 7.19 7.07 6.96 6.84 6.73 6.62 6.52 6.42 6.32 6.22 6.12 6.03 5.93
5.84 5.75 5.67
10.0 ppt 18.1 ppt
12.89 12.55 12.22 11.91 11.61 11.32 11.05 10.78 10.53 10.29 10.06 9.84 9.62
9.42 9.22 9.03 8.84 8.67 8.50 8.33 8.17 8.02 7.87 7.73 7.59 7.46 7.33 7.20
7.08 6.93 6.85 6.73 6.62 6.52 6.42 6.31 6.22 6.12 6.03 5.98 5.84 5.75 5.67
5.58 5.50 5.41
15.0 ppt 27.1 ppt
12.10 11.78 11.48 11.20 10.92 10.66 10.40 10.16 9.93 9.71 9.49 9.29 9.09 8.90
8.72 8.54 8.37 8.21 8.05 7.90 7.75 7.61 7.47 7.34 7.21 7.08 6.96 6.85 6.73
6.62 6.51 6.41 6.31 6.21 6.11 6.02 5.93 5.84 5.75 5.66 5.58 5.49 5.41 5.33
5.25 5.17
20.0 ppt 36.1 ppt
11.36 11.07 10.79 10.53 10.27 10.03 9.80 9.58 9.36 9.16 8.96 8.77 8.59 8.41
8.24 8.08 7.92 7.77 7.62 7.48 7.35 7.21 7.09 6.96 6.84 6.72 6.62 6.51 6.40
6.30 6.20 6.10 6.01 5.91 5.82 5.73 5.65 5.56 5.48 5.40 5.32 5.24 5.17 5.09
5.02 4.94
25.0 ppt 45.2 ppt
10.66 10.39 10.14 9.90 9.66 9.44 9.23 9.02 8.83 8.64 8.45 8.28 8.11 7.95 7.79
7.64 7.50 7.36 7.22 7.09 6.96 6.84 6.72 6.61 6.50 6.39 6.28 6.18 6.09 5.99
5.90 5.81 5.72 5.63 5.55 5.46 5.38 5.31 5.23 5.15 5.08 5.01 4.93 4.86 4.79
4.72
– 22 –
Salinity = Dissolved salts in water. Chlorinity = Measure of chloride content, by mass, of water. S () = 1.80655 x Chlorinity ()
12 Appendix B: DO % Calibration Values
Cal. value D.O. 10%1% 100% 99% 98% 97% 96% 95% 94% 93% 92% 91% 90% 89% 88% 87%
in Hg 30.22 29.92 29.62 29.32 29.02 28.72 28.43 28.13 27.83 27.53 27.23 26.93 26.63 26.33 26.03
Pressure
mmHg kPa 767.6 102.34 760.0 101.33 752.4 100.31 744.8 99.30 737.2 98.29 729.6
97.27 722.0 96.26 714.4 95.25 706.8 94.23 699.2 93.22 691.6 92.21 684.0 91.19
676.4 90.18 668.8 89.17 661.2 88.15
mbar 1023.38
Cal. value
D.O. 8%6%
1013.25 85%
1003.12 84%
992.99 83%
982.85 82%
972.72 81%
962.59 80%
952.46 79%
942.32 78%
932.19 77%
922.06 76%
911.93 75%
901.79 74%
891.66 73%
881.53 72%
in Hg 25.73 25.43 25.13 24.83 24.54 24.24 23.94 23.64 23.34 23.04 22.74 22.44 22.14 21.84 21.54
Pressure
mmHg kPa 653.6 87.14 646.0 86.13 638.4 85.11 630.8 84.10 623.2 83.09 615.6
82.07 608.0 81.06 600.4 80.05 592.8 79.03 585.2 78.02 577.6 77.01 570.0 75.99
562.4 74.98 554.8 73.97 547.2 72.95
mbar 871.40 861.26 851.13 841.00 830.87 820.73 810.60 800.47 790.34 780.20 770.07 759.94 749.81 739.67 729.54
APERA INSTRUMENTS (Europe) GmbH Address: Wilhelm-Muthmann-Str. 18 42329
Wuppertal Germany Tel: +49 202 51988998 Email: info@aperainst.de Website:
www.aperainst.de
– 23 –
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>