Sper scientific 860055 User manual

Dissolved Oxygen Pen
860055
Instruction Manual

Table of Contents
1. Introduction ...................................... 1
2. Accessories Included ....................... 1
3. LCD Display ..................................... 2
4. Key Pad Operation .......................... 2
5. Quick Start ....................................... 3
6. Calibration ....................................... 4
7. Operation ......................................... 4
8. Maintenance .................................... 6
9. Setup ............................................... 7
10. Troubleshooting ............................. 8
11. Specications ................................. 9
12. Warranty ...................................... 10

1
1. Introduction
Thank you for purchasing this long cable dissolved
oxygen pen. Please read the manual in its entirety
and retain for future use. Proper use and mainte-
nance of this product can result in accurate measure-
ments and extended service life.
Features:
• Large screen with adjustable brightness
• Small and easy to carry
• Accurate DO and temperature readings
• Low battery indicator
• Rechargeable via a USB Type-C cable
• Simple calibration in air, no chemicals needed
• Easy to maintain
• Built-in automatic temperature compensation
2. Accessories Included
• Dissolved Oxygen Meter
• Dissolved Oxygen Probe w/ 16ft (5m) cable
• 2 Replacement Membranes (PN: 850048H)
• Replacement Electrolyte (PN: 850048E)
• USB Type-C Charging Cable
• User Manual
• Carrying Case

2
3. LCD Display
4. Keypad Operation
•Short press to turn on. When no key is oper-
ated for 20 minutes, unit will auto power o󰀨.
Press and hold when turning on until the word
“n” appears to disable the auto o󰀨 feature.
•In power-on state, short press to HOLD
reading.
•In power-on state, long press to power o󰀨.
•In settings, short press to conrm setting.
•Short press to switch the units of measure.
(mg/L or %)
•Long press to enter the calibration.
•In settings, short press to adjust up.
•Short press to turn on the LCD back light,
short press again to turn o󰀨 back light.
•Long press to enter the settings menu.
•In settings, short press to adjust down.

3
5. Quick Start
1. No need to remove the anti-collision cover before
use.
2. This meter is ready to use and has been pre-lled
with electrolyte.
3. Short press the “POWER” button to turn on.
4. Please allow the unit to stabilize for 5 minutes
when rst powered on.
5. Before each measurement, place the probe in the
air for 100% saturated oxygen calibration.
6. If performing daily comparison testing, check the
reading at the regular time and regular spot.
7. Maintenance after a period of use is simple. Shake
the probe slightly then visibly check the amount of
electrolyte. If less than half full, unscrew the mem-
brane head and rell about 3/4 of the way full. If spill-
age occurs, simply wipe dry. The membrane head
should be replaced after approximately six months.
8. If usage is frequent and/or there is a large di󰀨er-
ence in comparison measurements, it is recommend-
ed to replace the membrane head and electrolyte.
9. When replacing the membrane head, make sure to
screw it on tightly. The membrane and the metal elec-
trode should be in close contact. Be sure to remove
any air bubbles in the electrolyte. A small amount of
air bubbles present is acceptable, but the center of
the membrane should be free of bubbles.

4
6. Calibration
In order to obtain accurate readings, we recommend
performing calibration before each operation, after
membrane and/or electrolyte replacement. There is
no need to remove the anti-collision cover to perform
calibration.
1. In normal mode, change measurement units to %
and place the probe in fresh air. Allow a few minutes
for readings to stabilize.
2. Long press “CAL” button to perform the 100% sat-
uration calibration. CAL will ash on the screen.
3. Wait for a few seconds to 1 minute while the read-
ing stabilizes. Once CAL stops ashing, short press
the “POWER” button to complete the calibration.
4. After calibration, the display value should read
between 99.0% to 101.0%. If an error occurs during
calibration, check the electrolyte level and make sure
the probe connection is secure.
7. Operation
Charge & checking probe
This product has a built-in rechargeable battery.
Unscrew the top cover and use the included USB
charging cable to charge. Battery will be charged in
1.5 hours and provide 60 hours of use.
The anti-collision cover on the D.O. probe provides
protection and does not need to be removed during
use.

5
Before each regular use, shake the probe gently and
visually inspect the electrolyte. Rell the probe with
electrolyte if the uid is less than half full.
Power on & o󰀨 the Meter
Short press the “POWER” button to turn on the LCD.
Long press the “POWER” button to turn o󰀨 the meter.
Calibration
This meter has been calibrated at the factory, but
calibration is still necessary before each use to obtain
the best results.
Please refer to the calibration section for calibration
procedures.
Obtain Measurements
Immerse the electrode in to the test solution and gen-
tly shake. The dissolved oxygen level and tempera-
ture will appear on the LCD.
Switching D.O. Units
Short pressing the “CAL” button with switch between
% and mg/L units.
LCD Back light
To make it easier to see in dark places, short press
the “SET” button to turn on or o󰀨 the LCD back light.
Holding a Reading
Short pressing the “POWER” button will temporarily
lock the current LCD reading. To release the held
reading, short press the “POWER” button.

6
6. Maintenance
Visual Checks
Check the probe every six months or when you ob-
serve strange readings.
1. The probe does not need to be lled entirely with
electrolyte but once the probe is less than half full, it
will need to be relled.
2. Be sure the probe surface is kept clean and no air
bubbles are trapped in the middle of the membrane.
Replacing the Membrane
The probe membrane should be replaced if any of
the following occurs:
-The probe has been used for six months or more.
-There is an error code E1 or E3.
-The membrane is damaged or wrinkled.
-The measurement speed is noticeably slower.
Steps:
1. Inspect the new membrane for any damage.
2. Slowly ll the new membrane until the membrane
cap is 3/4 full.
3. Unscrew the old membrane o󰀨 the probe. Inspect
the metal sensor on the probe for any debris and
wipe clean with a soft cloth.
4. Tightly screw on the new membrane on to the
probe. A small amount of air bubbles present is ac-
ceptable, but the center of the membrane should be
free of bubbles.

7
5. Perform calibration once membrane replacement
is complete.
7. Setup
This meter has an advanced setting mode that allows
you to customize parameters. To enter the settings
mode, long press the “SET” button.
The rst setting you will see is the salinity value. If
you want to select other parameters, short press the
“POWER” button to cycle through the menu.
When you see the parameter you want to set, short
press the “CAL” button and use the “CAL” button to
raise the value and use the “SET” button to decrease
the value. After adjustment short press the “POWER”
button to conrm.
Setting Icon Default Range
Salinity SAL 0.0 ppt 0.0 ~ 45.0 ppt
Pressure
Unit
AP mmHg mmHg or Kpa
Pressure AP 760mmHg
101.3Kpa
500~760mmHg
101.3~66.7Kpa
Temperature
Unit
Unt °C °C or °F
Back Light
Level
bL 2 1, 2, 3 Level

8
8. Troubleshooting
Error Code List
D.O. Value
E01: Indicates that the sensing element is damaged.
Repairs to the sensing element are not possible and
the probe will need to be replaced.
E03: The signal strength is to high, it is normal to
appear for a few seconds when powering on the unit.
If the E03 error continues, perform an air calibra-
tion. If no improvement, replace the membrane and
electrolyte. If no improvement, the probe will need to
be replaced.
E21: The measured temperature is lower than 10°C
or above 40°C. This is outside of the automatic tem-
perature compensation range. The D.O. pen will still
operate but the accuracy will be a󰀨ected.
Temperature Value
E01: Indicates that the sensing element is damaged.
Repairs to the sensing element are not possible and
the probe will need to be replaced.
E02: The temperature is lower than 0°C. Place probe
in an environment at or above 25°C for 5 minutes. If
no improvement, the probe will need to be replaced.
E03: The temperature is higher than 50°C. Place
probe in an environment at or above 25°C for 5
minutes. If no improvement, the probe will need to be
replaced.

9
Specication
D.O. Range (in mg/L) 0.00~20.00 mg/L
D.O. Accuracy ± 0.4 mg/L
D.O. Resolution 0.01 mg/L
D.O. Range (in %) 0.0~199.9
D.O. Accuracy ± 3% Full Scale
D.O. Resolution 0.1 %
Temp. Range 0~50.0°C / 32~122°F
Temp. Accuracy 0.1°C / 0.2°F
Temp. Resolution 0.1°C
Automatic Temp. Compensation
Manual Compensation
Salinity Range
Salinity Resolution
Barometric Pressure
Pressure resolution
10~40.0°C / 50~104°F
Included
0.0~45.0 ppt
0.1 ppt
500~760mmHg/101.3~66.7Kpa
1mmHg / 0.1KPA
LCD Size 30(H) x 18(W) mm
Operating Temperature 0~40°C / 32~104°F
Operating RH% <85%
Storage Temperature 0~40°C / 32~104°F
Storage RH% <80%
Sensor Response Time 30 sec for DO, 90 sec for Temp
Sensor Warm Up Time 60 seconds after power up
Sensor Life Time >6 months (good maintenance)
Dimensions 176(L) x 39(W) x 39(H) mm
Weight 265g
Battery 3.7V 500mAh Lithium Battery
Power Consumption 60 hours of operation
(No back light)
Recharge Time 1.5 hours
Standard Packaging
Meter, D.O. Probe, Electrolyte,
2 Replacement Membranes,
USB cable, Manual, Case

10
WARRANTY
Sper Scientic warrants this product against defects
in materials and workmanship for a period of one (1)
year from the date of purchase, and agrees to repair
or replace any defective unit without charge. If your
model has since been discontinued, an equivalent
Sper Scientic product will be substituted if available.
This warranty does not cover probes, batteries,
battery leakage, or damage resulting from accident,
tampering, misuse, or abuse of the product. Opening
the meter to expose its electronics will void the
warranty.
To obtain warranty service, ship the unit postage
prepaid to:
SPER SCIENTIFIC
8281 East Evans Road, Suite #103
Scottsdale, AZ 85260
The defective unit must be accompanied by a
description of the problem and your return address.
Register your product online at www.sperwarranty.
com within 10 days of purchase.
Rev 6/14/2023