Sper scientific 850048 User manual

DO Meter Kit
850048
Instruction Manual

2
FIRST TIME USE or USE AFTER BEING UNPLUGGED
FOR MORE THAN ONE HOUR.
This instrument requires calibration prior to operating.
After attaching the probe for the rst time, please allow
the probe to warm up for 30 MINUTES before beginning
calibration. Please see calibration instructions on page 9.
When using the meter, press the buttons rmly for
one full second to ensure proper operation.
DO Meter Kit 850048
Copyright ©2013 by Sper Scientic
ALL RIGHTS RESERVED
Printed in the USA
The contents of this manual may not be reproduced
or transmitted in any form or by any means electronic,
mechanical, or other means that do not yet exist or
may be developed, including photocopying, recording,
or any information storage and retrieval system
without the express permission from Sper Scientic.

3
TABLE OF CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . 4
Attaching and Detaching the Probe . . . . . . . . . . 5
Front Panel Description . . . . . . . . . . . . . . . . 6
LCD Display Description . . . . . . . . . . . . . . . . 7
Dissolved Oxygen % Saturation Calibration . . . . . . 8
Measurement Procedures . . . . . . . . . . . . . . . 9
Function Settings. . . . . . . . . . . . . . . . . . . .11
Memory Clear (P10) . . . . . . . . . . . . . . . . . 12
DO Review and Set Parameters (P60) . . . . . . .13
Select Temperature Units (P70) . . . . . . . . . . .14
Restore Default Settings (P90) . . . . . . . . . . .15
pH Electrode Slope (P20) . . . . . . . . . . . . . .16
Conductivity Calibration (P30) . . . . . . . . . . . .17
Conductivity Cell Constant (P40) . . . . . . . . . .18
DO Probe Maintenance . . . . . . . . . . . . . . . .19
Battery Installation and Replacement . . . . . . . . .21
Troubleshooting . . . . . . . . . . . . . . . . . . . . 21
Error Codes . . . . . . . . . . . . . . . . . . . . . .22
Specications . . . . . . . . . . . . . . . . . . . . .23
Appendix A: pH Probe (Optional) . . . . . . . . . . .25
Appendix B: Conductivity/Salinity Probe (Optional) . .29
Warranty . . . . . . . . . . . . . . . . . . . . . . . . 36

4
INTRODUCTION
This meter reads dissolved oxygen (DO) for measuring
water quality in labs, industrial and municipal waste water,
aquariums, sh hatcheries and environmental testing.
Features include automatic temperature compensation
(ATC) and manual altitude and salinity compensation.
The meter also provides readings in either °C or °F,
multiple calibration points (for optional pH and
conductivity probes), 99 memory points, a large backlit
LCD screen, a low battery icon and one-hour automatic
shut off. A Set Up Mode allows you to customize the
meter’s defaults and parameters.
The meter comes complete with DO probe, replacement
electrolyte uid, 2 replacement membrane sets, carrying
case, batteries, and instruction manual.
Optional Accessories:
• Replacement DO Probe - 850048DO
(includes 2 probe heads & electrolyte)
• Conductivity/Salinity Probe - 850048C/S
• pH Probe - 850048PH

5
ATTACHING AND DETACHING THE PROBE
Always turn the power OFF before attaching and
detaching the probe, and use caution. Please use
alignment quide markings on probe and meter for
proper connection (see image below).
To attach the probe to the meter:
1. Plug the probe into the connector port on top of
the meter.
2. Screw down the attached probe guard until it is
moderately tight.
To detach the probe from the meter:
1. Unscrew the probe guard (the piece that is directly on
top of the meter that connects the probe to the meter).
2. Holding the plug, pull the probe away from the meter.
DO NOT hold the cable and pull the probe and meter
apart as this may damage the probe connection.
Marker on
Meter Connection
Marker on
Probe Connection

6
FRONT PANEL DESCRIPTION
POWER/SET - Press to turn the meter on
and off. In Normal Mode, press for >2 seconds
to enter Function (Set) Mode.
CAL/ESC - Press to switch between Normal
and Calibration Modes. Press to return to
Normal Mode from Function or Recall Modes.
EC/SALT - If using with the optional conductivity
probe, press to switch between CON (µs) or
Salt (ppt) units.
RECALL - Press for >2 seconds to read the
memory value.
% / mg/L - Press to switch between
DO in % and mg/l.
▲- Press to increase the displayed value
in Function or Calibration Modes.
MEM - Press to save the current reading.
▼- Press to decrease the displayed value in
Function or Calibration Modes.
ENTER - Press to conrm the calibration or
parameter setting.
SET
ESC
CAL
EC/SALT
RECALL
% / mg/L
MEM
ENTER
SET
ESC
CAL
EC/SALT
RECALL
% / mg/L
MEM
ENTER
SET
ESC
CAL
EC/SALT
RECALL
% / mg/L
MEM
ENTER
SET
ESC
CAL
EC/SALT
RECALL
% / mg/L
MEM
ENTER
SET
ESC
CAL
EC/SALT
RECALL
% / mg/L
MEM
ENTER
SET
ESC
CAL
EC/SALT
RECALL
% / mg/L
MEM
ENTER

7
LCD DISPLAY DESCRIPTION
• The DO value is displayed
on the left side of the LCD.
• The temperature value is
displayed on the upper
right side of the LCD.
• The total number of records saved is displayed on the
lower right side of the LCD.
O
C
TEMP
MEMO
mg/l
O
ATC
7.The DO value will be displayed on the
left side of the LCD.
8.The temperature value will be
displayed in the upper right corner of
the LCD.
9.The MEMO number which is the total
number of records saved in the meter
will be displayed in the lower right
corner of the LCD.
4
DD
D.O. probe
DO PROBE (please inspect upon receiving)
Clean the electrode (see pg. 19) if there is too much white
residue attached to it. It is normal to see the cloudy/milky
electrolyte and there is no need to replace it for this
reason. The best condition of the electrode is a clean
surface. However, some white residue attached on
electrode is also ne.

8
DISSOLVED OXYGEN % SATURATION CALIBRATION
After attaching the probe, please allow the probe to
warm up for 30 minutes before beginning calibration.
Calibrate the meter before each use.
1. Remove the protective cap from the DO probe.
2. Press the power button to turn the meter ON.
See p.16 to adjust salt & altitiude value if necessary.
3. Hold the probe in a well ventilated area for several
minutes (it may take 5-10 minutes) until the LCD
reading has stabilized. This is particularly important
if you have just relled the electrolyte solution or
replaced either the batteries or the membrane set.
4. Press CAL/ESC for 2 seconds to calibrate for 100%
saturation. The CAL icon will ash on the LCD.
5. Press ENTER to nish the
calibration.
6. If “ERR” appears during
calibration, there is an error
due to low electrolytes or a
defective probe.
Note…
To exit Calibration Mode without saving the new value,
press CAL/ESC. The meter will retain the previously saved
calibration data for the current range.
O
C
DO
%
CAL
22
8.Repeat step 1~8 for other ranges
calibration if needed.
NOTE:
If you would like to exit the conductivity
calibration mode without saving,
please press CAL/ESC key instead
and it will retain the meter's previous
calibration data for the current range.
We recommend the users to calibrate
the meter before operate it each time.
Calibration Step for DO % SATURATION
a.In normal mode, hold the probe in
the air , wait for few minutes until the
reading on LCD is stabilized. Press
CAL/ESC to calibrate for 100%
saturation calibration, CAL icon is
flashing on LCD.(Fig 23)
b.Wait couple seconds, when the
reading is stable, press ENTER to
finish the calibration.
c.You can stop the calibration by
pressing CAL/ESC.
d.Whenever an error occurs during
calibrating, the ERR indicator will
appear. It might cause by low
electrolyte condition or probe defect.
Fig. 23
DO % SATURATION CALIBRATION
Note:
While following condition happens,
Please turn on the meter and wait for

9
MEASUREMENT PROCEDURES
1. Remove the protective cap from the DO probe.
2. Insert the DO probe into the meter.
3. Press the power button to turn the meter ON.
4. Hold the probe in the air until the LCD reading has
stabilized. This may take several minutes.
5. The DO reading will be displayed on the LCD.
You may change the display from % to mg/L
as desired by pressing % / mg/L.
6. Place the probe into the sample solution, making
sure that the electrode is completely immersed in
the sample.
7. Stir the probe gently to create a homogenous sample.
8. Wait until the reading has stabilized.
Storing DO Readings in Memory
1. To store the reading in memory, the value must be
displayed in mg/l. Press % / mg/L if needed to change
from % to mg/L.
2. Press the MEM button to save the value.
3. The memory number will be displayed on the LCD.
If the memory is full, “FUL” will be displayed. See
Memory Clear Function on p.12.

10
Recall Readings
1. Press and hold RECALL for 2 seconds to enter
Recall Mode.
2. Press ▲ or ▼ to scroll through the data in memory.
3. Press CAL/ESC for 2 seconds to return to
Normal Mode.
O
C
DO
TEMP
MEMO
mg/l
ATC
This meter has the advanced setup
mode which allows you to customize
and check your meter's preferences
and defaults.If you would like to
change the parameters, please press
" SET " for more than 2 sec. to enter
the setup mode when the meter is in
the measurement mode.
NOTE:
To exit the function without saving in
the setup mode, press the CAL/ESC
key until the measurement mode
appears. If the meter is under the
setting value status, press the
CAL/ESC key twice to exit.
SETUP
9
Fig 18
Press any key to actirate the
backlight for 10 seconds
BACKLIGHT

11
FUNCTION SETTINGS
Entering Function Mode
1. Press and hold SET for >2 seconds to enter
Function Mode.
2. Press ▲ or ▼ to scroll through the programmable
functions. The meter will display functions for the
probe currently in use. The left side of the LCD shows
the |function name and the right side shows the
function number.
3. Press CAL/ESC to exit Function Mode.
The table below shows the programmable functions
of the DO probe as well as the optional pH and
Conductivity probes.
Parameter DO COND PH
P 10 Memory Clear-Clr adjustable x x x
P 20 PH Electrode Slope Review x
P 30 Cond. Calibration Review x
P 40 Cond. Cell Constant Review x
P 60 DO Review & Set parameters adj. x
P 70 Temperature unit setting adjustable x x x
P 90 Reset to Default Setting adjustable x x x

12
Memory Clear Function (P10)
Note…
This function will clear all 99 records in the memory.
Once cleared, the data cannot be recovered.
Clearing the memory will delete the records for the current
probe type only. For example, if you are using the optional
conductivity probe and you clear the memory with that
probe inserted, you will not affect any records stored with
the DO probe.
1. Enter Function Mode. “Clr P10” will be displayed on
the LCD screen.
2. Press ENTER. The default “no” icon will ash and
“P11” will be displayed.
3. Press ▲or ▼ to change the status from “no” to “yes”.
4. Press ENTER to conrm. The memory records will
be cleared and “Clr P1” will display. To exit without
clearing the memory, press CAL/ESC.
5. Press ▲or ▼ to continue to the next function or
press CAL/ESC to exit Function Mode.
11
Fig. 1
Fig.2
Fig.3
CON
CON
CON
To view the pH electrode data (slope
value).
1. Enter setup mode, press △ or ▽ key
to enter the ELE P20 (Fig 4) display.
2. Press ENTER to view P22, the slope
value will be displayed on LCD, same
as P23 (Fig 5). As maximum 3 PH
calibration points is allowed in this
meter so the user can review two
slopes value. If the value is <75% or >
115%, it is suggested to change
electrode immediately.
P20 PH Electrode Slope (Review)
PH
Fig.4
11
Fig. 1
Fig.2
Fig.3
CON
CON
CON
To view the pH electrode data (slope
value).
1. Enter setup mode, press △ or ▽ key
to enter the ELE P20 (Fig 4) display.
2. Press ENTER to view P22, the slope
value will be displayed on LCD, same
as P23 (Fig 5). As maximum 3 PH
calibration points is allowed in this
meter so the user can review two
slopes value. If the value is <75% or >
115%, it is suggested to change
electrode immediately.
P20 PH Electrode Slope (Review)
PH
Fig.4
11
Fig. 1
Fig.2
Fig.3
CON
CON
CON
To view the pH electrode data (slope
value).
1. Enter setup mode, press △ or ▽ key
to enter the ELE P20 (Fig 4) display.
2. Press ENTER to view P22, the slope
value will be displayed on LCD, same
as P23 (Fig 5). As maximum 3 PH
calibration points is allowed in this
meter so the user can review two
slopes value. If the value is <75% or >
115%, it is suggested to change
electrode immediately.
P20 PH Electrode Slope (Review)
PH
Fig.4

13
DO Review and Set Parameters Function (P60)
1. Enter Function Mode. Press ▲or ▼ until “COE P60”
is displayed.
2. Press ENTER to view the previous DO calibration
temperature information. “P61” will be displayed.
3. Press ENTER again. The salinity compensation
value will ash and “P62” will be displayed.
DO
ppt
O
C
DO
DO
DO
M
14
Press Enter to confirm. then enter
P63M to measure height from sea level
with manually enter compensation
(Fig13). The value will be flashed on
the screen. You can manually enter △
or ▽ key to adjust from 0~3500M (100
M per step),press ENTER to confirm
and return to COE P60 screen.(Fig 10)
Fig.10
Fig.11
Fig.12
Fig.13
.
DO
ppt
O
C
DO
DO
DO
M
14
Press Enter to confirm. then enter
P63M to measure height from sea level
with manually enter compensation
(Fig13). The value will be flashed on
the screen. You can manually enter △
or ▽ key to adjust from 0~3500M (100
M per step),press ENTER to confirm
and return to COE P60 screen.(Fig 10)
Fig.10
Fig.11
Fig.12
Fig.13
.
DO
ppt
O
C
DO
DO
DO
M
14
Press Enter to confirm. then enter
P63M to measure height from sea level
with manually enter compensation
(Fig13). The value will be flashed on
the screen. You can manually enter △
or ▽ key to adjust from 0~3500M (100
M per step),press ENTER to confirm
and return to COE P60 screen.(Fig 10)
Fig.10
Fig.11
Fig.12
Fig.13
.
Note…
To exit at any point without making any changes,
press CAL/ESC.
4. Press or hold down ▲or ▼ to adjust the salinity
compensation value. The salinity value can be
adjusted from 0.0 to 42.0 ppt.
5. Press ENTER to conrm.
6. The compensation value for height above sea level will
ash and “P63” will be displayed. Press or hold down
▲or ▼ to adjust the value. The height level can be
adjusted from 0 to 3500 m in 100 m increments.

14
7. Press ENTER to conrm.
8. Press ▲or ▼ to continue to the next function or
press CAL/ESC to exit Function Mode.
Select Temperature Units Function (P70)
Temperature data can be displayed in either °C or °F.
1. Enter Function Mode. Press ▲or ▼ until “unt P70”
is displayed.
2. Press ENTER. “C” or “F” will ash and “P71” will
be displayed.
3. Press ▲or ▼ to change the temperature units.
4. Press ENTER to conrm.
5. Press ▲or ▼ to continue to the next function or
press CAL/ESC to exit Function Mode.
P70 Temperature unit adjustable
15
This function allows you to select the
unit of the temperature:
1. Press △ or ▽ key in the setup mode
to enter the temperature unit P70
screen. Press the ENTER key to select
temperature unit setting.“unt”will
display on the left side of the screen
( Fig 14 )
2. At P70 screen, press ENTER key to
enter P71.
The default "C" will be flashed on the
main screen.
(Fig15). If the unit you need is degree
oC, press ENTER key to confirm.
O
3. If the unit you desired is degree F,
press△or ▽ key to change the C to F
and then press ENTER key to confirm.
The meter will return to P70 screen
(Fig 14)
Fig.14
Fig.15
P70 Temperature unit adjustable
15
This function allows you to select the
unit of the temperature:
1. Press △ or ▽ key in the setup mode
to enter the temperature unit P70
screen. Press the ENTER key to select
temperature unit setting.“unt”will
display on the left side of the screen
( Fig 14 )
2. At P70 screen, press ENTER key to
enter P71.
The default "C" will be flashed on the
main screen.
(Fig15). If the unit you need is degree
oC, press ENTER key to confirm.
O
3. If the unit you desired is degree F,
press△or ▽ key to change the C to F
and then press ENTER key to confirm.
The meter will return to P70 screen
(Fig 14)
Fig.14
Fig.15

15
Restore Default Settings (P90)
1. Enter Function Mode. Press ▲or ▼ until “rSt P90”
is displayed.
2. Press ENTER. “No” will ash and “P91” will be displayed.
3. Press ▲or ▼ to change the status from “no” to “yes”.
4. Press ENTER to conrm. The meter will revert to the
factory default settings. To exit without restoring the
default settings, press CAL/ESC.
5. Press ▲or ▼ to continue to the next function or press
CAL/ESC to exit Function Mode.
DO
DO
P90 Reset to Defa ult Adjusta ble
Use this option to reset the meters to
the factory default setting.
Press △or ▽ in the setup mode to
enter the r St P90 screen and select
the reset to default setting (Fig 16)
1.At P90 screen, press Enter key to
enter P91.The default set " no " icon
will be flashed on the main screen.
(Fig 17) If you do not desire to reset
to the default setting, press Enter key
to confirm.
2.If you would like to reset the meter to
its factory default setting, press △or
▽ to switch the icon from “no” to “YES”
and then press ENTER key to confirm.
The screen will return to P90 screen.
(Fig 16)
Fig.16
Fig.17
16
Parameters Defa ult Setting Value
P10 Memory Clear-CLr adjustable No.
P20 PH Electrode Slope Review 100%
P30 Cond. Calibration Review 146.6uS,1413uS
12.88mS, 51.5mS
P40 Cond. Cell Constant Review 1.00
P60 DO Review and Set param eters
adjustable
250C, 0ppm, 0Meter
P70 Temperature unit se tting adjustable Degree ℃
P90 Reset to Default S etting A djustable No
DO
DO
P90 Reset to Defa ult Adjusta ble
Use this option to reset the meters to
the factory default setting.
Press △or ▽ in the setup mode to
enter the r St P90 screen and select
the reset to default setting (Fig 16)
1.At P90 screen, press Enter key to
enter P91.The default set " no " icon
will be flashed on the main screen.
(Fig 17) If you do not desire to reset
to the default setting, press Enter key
to confirm.
2.If you would like to reset the meter to
its factory default setting, press △or
▽ to switch the icon from “no” to “YES”
and then press ENTER key to confirm.
The screen will return to P90 screen.
(Fig 16)
Fig.16
Fig.17
16
Parameters Defa ult Setting Value
P10 Memory Clear-CLr adjustable No.
P20 PH Electrode Slope Review 100%
P30 Cond. Calibration Review 146.6uS,1413uS
12.88mS, 51.5mS
P40 Cond. Cell Constant Review 1.00
P60 DO Review and Set param eters
adjustable
250C, 0ppm, 0Meter
P70 Temperature unit se tting adjustable Degree ℃
P90 Reset to Default S etting A djustable No

16
pH Electrode Slope (View Only) Function (P20)
For use with optional pH probe.
To view the pH electrode data (slope value):
1. Enter Function Mode. Press ▲or ▼ until “ELE P20”
is displayed.
2. Press ENTER to view P22. The slope value will
be displayed.
Note...
The meter allows a maximum of 3 pH calibration points,
so you can review 2 slope values. If the displayed value
is <75% or >115%, we recommend that you change the
electrode immediately.
3. Press CAL/ESC to return to the “ELE P20” display.
4. Press ▲or ▼to continue to the next function or press
CAL/ESC to exit Function Mode.
11
Fig. 1
Fig.2
Fig.3
CON
CON
CON
To view the pH electrode data (slope
value).
1. Enter setup mode, press △ or ▽ key
to enter the ELE P20 (Fig 4) display.
2. Press ENTER to view P22, the slope
value will be displayed on LCD, same
as P23 (Fig 5). As maximum 3 PH
calibration points is allowed in this
meter so the user can review two
slopes value. If the value is <75% or >
115%, it is suggested to change
electrode immediately.
P20 PH Electrode Slope (Review)
PH
Fig.4
CON
CON
uS
PH
%
12
Fig.5
Press △ or ▽ key in the setup mode to
check the CAL P30 calibration
message.(Fig 6)This feature is only to
facilitate the user to view the previous
conductance calibration message
-Press ENTER key, to enter the
calibration information screen with
P32 . P33. P34. P35 CON. uS or mS
calibration information.(Fig 7)P32 will
display calibration information in
Range1. P33 will display calibration
information in Range 2.…P35 will
display calibration information in
Range 4. Press ENTER key to return
to CAL 30 screen.(Fig 6)
P30 Cond. Calibration (Review)
Fig.6
Fig.7

17
Conductivity Calibration (View Only) Function (P30)
For use with optional conductivity probe.
This function allows you to view previously stored
conductivity calibration values.
1. Enter Function Mode. Press ▲or ▼ until “CAL P30”
is displayed.
2. Press ENTER to view the calibration information for
Range 1. “P32” will be displayed.
CON
CON
uS
PH
%
12
Fig.5
Press △ or ▽ key in the setup mode to
check the CAL P30 calibration
message.(Fig 6)This feature is only to
facilitate the user to view the previous
conductance calibration message
-Press ENTER key, to enter the
calibration information screen with
P32 . P33. P34. P35 CON. uS or mS
calibration information.(Fig 7)P32 will
display calibration information in
Range1. P33 will display calibration
information in Range 2.…P35 will
display calibration information in
Range 4. Press ENTER key to return
to CAL 30 screen.(Fig 6)
P30 Cond. Calibration (Review)
Fig.6
Fig.7
CON
CON
uS
PH
%
12
Fig.5
Press △ or ▽ key in the setup mode to
check the CAL P30 calibration
message.(Fig 6)This feature is only to
facilitate the user to view the previous
conductance calibration message
-Press ENTER key, to enter the
calibration information screen with
P32 . P33. P34. P35 CON. uS or mS
calibration information.(Fig 7)P32 will
display calibration information in
Range1. P33 will display calibration
information in Range 2.…P35 will
display calibration information in
Range 4. Press ENTER key to return
to CAL 30 screen.(Fig 6)
P30 Cond. Calibration (Review)
Fig.6
Fig.7
3. Press ENTER to continue scrolling through the
calibration information for Range 2 (P33),
Range 3 (P34) and Range 4 (P35).
4. Press ENTER to return to the “CAL P30” display.
5. Press ▲or ▼to continue to the next function or
press CAL/ESC to exit Function Mode.

18
2. Press ENTER to view the cell constant information
screen. “P42” will be displayed.
Conductivity Cell Constant (View Only) Function (P40)
For use with optional conductivity probe.
1. Function Mode. Press the ▲or ▼ buttons until
“CEL P40” is displayed.
CON
CON
Press △ or ▽ key in the setup mode to
check CEL P40 display(Fig 8). Press
ENTER key to enter P42. P43.P44 and
P45 screen (Fig 9) and review each
range cell constant. Press ENTER key
again to return on the CEL P40 screen.
(Fig 8)
Fig. 8
Fig.9
P40 Cond. Cell Constant (Review)
13
P60 DO Revie w and Set paramete rs adju sta ble
Press △ or ▽ key in the setup mode to
enter COE P60 screen (Fig 10). When
the monitor is under DO screen. Press
ENTER key to display P61 and review
previous DO calibration temperature
(Fig 11). Then press “ENTER” into P62
ppt, the value will be flashed on the
screen (Fig 12 ). You can manually
enter the salinity compensation.( Use
salinity value measured by the
conductivity probe). Press△ or ▽
to adjust the salinity value. The value
can be adjusted from 0.0 to 42.00ppt.
CON
CON
Press △ or ▽ key in the setup mode to
check CEL P40 display(Fig 8). Press
ENTER key to enter P42. P43.P44 and
P45 screen (Fig 9) and review each
range cell constant. Press ENTER key
again to return on the CEL P40 screen.
(Fig 8)
Fig. 8
Fig.9
P40 Cond. Cell Constant (Review)
13
P60 DO Revie w and Set paramete rs adju sta ble
Press △ or ▽ key in the setup mode to
enter COE P60 screen (Fig 10). When
the monitor is under DO screen. Press
ENTER key to display P61 and review
previous DO calibration temperature
(Fig 11). Then press “ENTER” into P62
ppt, the value will be flashed on the
screen (Fig 12 ). You can manually
enter the salinity compensation.( Use
salinity value measured by the
conductivity probe). Press△ or ▽
to adjust the salinity value. The value
can be adjusted from 0.0 to 42.00ppt.
3. Press ENTER to continue scrolling through the
cell constant information for P43, P44 and P45.
4. Press ENTER to return to the “CEL P40” display.
5. Press ▲or ▼to continue to the next function or
press CAL/ESC to exit Function Mode.

19
5
Note: Please turn the power off before
replace the probe. Turn the power on
after the probe is plugged and screw
tightly.
START UP
1.Install the batteries into the meter.
2.There are three probes which can be
connected to the meter. PH probe with
black connector, COND. probe with
blue connector, D.O. probe with
green connector.
Temp Ph Temp Cond
Temp D.O.
The charts below indicates the electrode
and temperature sensor location.
There is guide way design between the
probe plug and the meter connect to
help you easily install the probe by
plug the probe with the aligned guide
way, then put the probe guard on and
screw it tight moderately.
OPERATION
Parameters Default Setting Value
P 10 Memory Clear-CLr adjustable No
P 20 pH Electrode Slope Review 100%
P 30 Cond. Calibration Review 146.6 µS, 1413 µS,
12.88 mS, 51.5 mS
P 40 Cond. Cell Constant Review 1.00
P 60 DO Review and Set
parameters adjustable
25°C, 0 ppm, 0 Meter
P 70 Temperature unit setting adj. Degree °C
P 90 Reset to Default setting adj. No
DO Probe Maintenance
• Protect the probe in the storage cap when
it is not in use.
• Make sure the electrode is clean. Rinse it
carefully in deionized water before using.
• Please store at 0 ~ 50°C after each use.
Cleaning the Electrode
Disassemble the electrolyte from probe and use soft/long
ber cloth to clean the electrode surface where the white
residue is attached. After cleaning the electrode, assemble
the membrane kit properly.

20
DO probe
Sprue for solution filling
Probe protective cap
Membrane Set
If the surface of testing electrode is
contaminated, place the probe in a
diluted detergent or diluted acid about
15minutes,then rinse it with distilled
water. After clearing, please keep dry
for storage and put the cover to
protect the probe.
DO probe maintenance
Please protect and storage the probe
with the transparent cover, and always
moistened the probe with clean water
while in storage.
24
If you can see through the probe or the
probe has many bubbles, it means that
the electrolyte solution in the front end
of the probe has evaporated, you need
to refill the electrolyte solution. Please
fill the electrolyte solution as the step
below
There are one bottles of electrolyte
solution in the package, they are ready
to use for refilling.
1.Rotated the probe and take the probe
protective cap off.
2.Pour the
solution to the membrane set on the
probe.
3.Assembled the membrane set
4.Put the probe protective cap back.
5.Screw the probe protective cap tightly.
To refill DO electrolyte solution
Relling the Membrane Set & Electrolyte Solution
Replace the membrane set when the membrane is dirty
or damaged or when calibration cannot be performed.
1. Remove the protective cap from the DO probe.
2. Unscrew the old membrane set from the probe.
3. Hold the new membrane set vertically on a at
surface and add the fresh uid.
4. Install the new membrane set by screwing it onto
the probe.
5. Replace the protective cap on the probe and tighten
it until it is secure.
Rell the electrolyte
solution when:
• The solution
has evaporated.
• You are changing the membrane set.
• There are bubbles in the probe.
• The meter appears to be less sensitive.
• An error message indicates that measurements
are inaccurate.