One-Tool OTO350 User Manual
ENGINE OIL ANALYZER OTO350
Test Result
Explanation
0
-20%
N
ew Oil / Oil newly changed
20%
-60%
Excelle nt / good oil quality
6
0%-80%
Fair oil quality
80
-90%
Recomm
end oil change
Lj90%
Recommend
immediate
oil
change / Recommend engine check
USER’S MANUAL
Main Menu
GAS1 DSL1
GAS2 DSL2
Drop test oil /
Testing...
Pollution˖78%
Test done!
INSTRUMENT DESCRIPTION
BUTTONS DESCRIPTION
Power button
Fig.1 Fig.2
Important˖
• Do not drop oil on the sensor before turning on the
unit. Make sure that the sensor and the inner surface
of the bowl are clean and dry.
• Do not test hot oil. For best results, the temperature of
the oil sample to be tested should be close to the
temperature of the instrument, and both should be
between 10ć-27 ć
• Place the instrument on a flat surface when testing.
• Put 3-5 drops of oil on the sensor until the oil surface
reaches the required height which is indicated in Fig.3
Fig.3
EXPLANATION FOR TEST RES U LTS
• When the instrument is OFF, to turn it ON press
and hold the Power button until the unit turns on
(in approximately 5 seconds).
• When the instrument is ON, to turn it OFF press
and hold the Power button until the display turns
off (in approximately 5 seconds).
• Carry out current operation.
• The ‘Auto Power Off’ feature will automatically turn
the instrument off after 5 minutes of no button
being pressed.
Up button
Down button
Back button
Next button
OPERATING INSTRUCTION
1. Turn the instrument on.
2. Select the oil mode by pressing the Up and Down button,
and then press the Power/Next button as shown in Fig.1.
3. Put 3-5 drops of oil to the bowl of the instrument.
4. Press the Power button. The result will be shown on the
display in approximately 15 seconds as shown in Fig.2.
HOW DOES THE INSTRUMENT WORK?
The tester primarily reacts to the increase in acidity of oil.
As the oil degrades, it becomes more acidic and will begin
to pit mental engine parts. The result Lj90% usually means
that the level of acid in the oil has reached a maximum
acceptable level, and the oil should be changed. However,
other contaminants (such as dirt, soot, water, antifreeze
and metal particles) also influence the reading. Water or
antifreeze in the oil may indicate a bad seal or head gasket.
Metal particles result from unusual water of bearings,
pistons, rings, etc. Excessive carbon or soot may be
caused by poor compression and excess iv e blow-by. Fuel
leaking can dilute the oil and may cause an artificially good
oil quality reading. If test results show that oil quality does
Drop Cal Oil //
Done
Drop new Oil
Drop Cal Oil
Done
Drop new oil
not drop as expected over time or seems to improve, check
engine for fuel leaks. (Try a drop of oil on paper. Look for a
gray ring.) If a significantly worse oil rating than expected is
displayed, we recommend having the engine checked, or
send a sample to an oil laboratory for analysis.
COMMON CAUSES OF INA CCURATE READING
1. The sensor and oil bowl are not clean.
2. The oil surface do not reach the required height as
indicated in Fig.3
3. The additives of the engine oil may result in inconsistent
testing results of one oil sample for each time testing, the
accuracy should be ± 5%.
4. The sensor is sensitive to working temperature and relative
humidity. Dampness or severe heat or cold environment
may affect testing result.
5. If engine oil condition is inconsistent with testing result,
calibration is required.
7. Wipe the oil bowl with clean and dry paper towel.
Important:
• The old and new oil for calibration must be the same
certain kind of engine oil.
• The old oil for calibration must reach a maximum
acceptable level (oil close or recommend to change).
Fig.4 Fig.5
CHARGING THE INSTRUMENT
Please charge the instrumentwith power adaptor when the
unit indicates low battery. The charging light will turn from red
to green when the battery is full.
CALIBRATION
Calibration has been done under GAS1 mode after they are
out of factory. For engine oil dealer or manufacturer, we advise
calibrating the instrument by themselves for each certain kind
of engine oil due to different additives, which may affect testing
result significantly. Also,we advise calibrting the instrument
when the working temperature and relative humidity changed
dramatically or the engine oil condition is inconsistent with
testing result.
How to Calibrate?
1. When the instrument is OFF, press and hold the Back
button, and then press the Power button. The unit is ON.
2. Select the oil mode you need to set and then press the
Power or Next button. The unit is now under calibration
procedure.
3. Drop Calibration oil to the testing bowl, which must be old
oil close or recommend to change.
4. Press the Power button to execute calibrating until the
display shown done as in Fig.4 below. Wipe the oil bowl
with clean and dry paper towel.
5. As indicated on the display, drop new oil to be tested to the
testing bowl. Press the Power button to execute calibrating
until the display shown result stored as shown in Fig.5
below.
6. Press the Back button to the main menu and then press
the Power button to turn the unit OFF. Calibration is
complete.
SPECIFICATIONS
Application˖ The instrument is designed to test gasoline or
diesel engine oil.
Display˖128*64 LED Display
Power Supply ˖3.7V Li rechargeable battery with 1000PAh
Operating Environment: Working Temperature 10ć-27 ć
Relative Humidity < 80%
Accuracy˖± 5%
Dimensions˖145x85x20mm
MAINTENANCE
• This instrument is de signed for indoor use only. Do not
use the instrument in rain.
• Keep the oil bowl and sensor dr y and clean. After each
time testing, cleaning should be done to the oil bowl
and sensor with a clean and dry paper towel.
• Keep the instrument in its carrying case when not in
use and do not subject it to dampness or severe heat
or cold.
WARRANTY
This instrument is warranted against defects of material or
workmanship which develop within a period of six months
following the date of purchase by the original owner.
The unit is a sealed instrument and contains no user
serviceable parts. Opening other parts of the unit will void the
warranty.
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