Ono Sokki SE-1200 User manual

1Power switch
Turns the power ON or OFF.
Even if you release the power switch, the power ON condition
is retained for 30 seconds.
2Display
Displays measurement values and various conditions.
3Detecting element
Brought close to the high-tension cords of the engine to detect
the rotational signal (ignition pulse).
4RECALL/CLR switch
Recalls memorized measurement values and clears them at
one time.
5MEMORY/COND switch
Writes data in memory at the time of measurement, selects
the setup mode, and changes settings.
1.Overview
The SE-1200 Digital Engine Tachometer is a non-contacting
type handy engine tachometer with built-in batteries and in-
tegrated detecting element, measurement section, and dis-
play.
The SE-1200 makes it possible to measure the rotational
speed of a gasoline engine simply by bringing it close to the
high-tension cords of the engine.
2.Features
・Compact light-weight body with a large-sized liquid crystal
display
・Measurement in 1-r/min unit is possible at a large
measurement range.
・Applicable to diverse gasoline engines including 2-stroke
engines (with 1 to 4 cylinders) and 4-stroke engines (with
1 to 12 cylinders) with a setup of the number of cylinders.
・Memory function useful for checking measurement values
(up to 10 results can be memorized)
・Over-range display function which fixes display value to
maximum value and displays "ERROR" if measurement
value exceeds each measurement range
・Continuously displays final measurement value for about
30 seconds upon completion of measurement
3.Unpacking
When you unpack the unit, make sure that you have all the
following:
①SE-1200 main unit ........................................................ x1
②Type AAA dry battery ................................................... x3
③Instruction manual ........................................................ x1
Overview
 WARNING
● Perform measurement using enough caution with the rotating
section of the engine.
● Perform measurement using enough caution with the high-
temperature section of the engine.
 CAUTION
● Do not contact the equipment with the high-temperature
section of the engine.
Since the equipment does not have sufficient heat resistance,
be careful not to contact it with the high-temperature section
(such as the exhaust pipe) of the engine.
● Do not contact the equipment with any high-tension cord.
Contacting the equipment with any high-tension cord may
cause malfunction or failure.
● If there are two or more ignition coils, measurement is not
possible.
● Exact measurement may not be possible if the ignition system
(distributor, high-tension cords, spark plugs, etc.) of the engine
is defective.
● If you do not use the equipment for a prolonged period of
time, remove the batteries from the unit.
If you do not use the equipment for a prolonged period of
time, exhausted batteries may cause leakage.
● Do not use or store the equipment on locations subject to
rapid temperature change.
Do not move the equipment from a hot place to a cold place
or vice versa. There is a risk of condensation inside the
equipment which may cause failure.
● Do not get water, oil, dust, or other foreign materials inside
the equipment.
Avoid using the equipment on locations exposed to water or
oil or locations which are very humid or dusty.
CAUTION
● Do not drop the product or apply excessive shock to it.
Since this product incorporates high-precision electronic parts,
be careful not to drop it or apply excessive shock to it.
● Wipe dirt off using a dry cloth or a cloth dampened with neutral
detergent and squeezed firmly. Do not use volatile oils (thinner,
benzine, etc.) or alcohols.
Name and Function of Each Section
1SE-1200 main unit
3Instruction manual2Type AAA dry batteries
DigitalEngineTachometer
SE-1200
InstructionManual
Copyright © ONO SOKKI CO.,LTD.
2006 All rights reserved.
ThankyouforyourselectionoftheSE-1200DigitalEngine
Tachometer.
ToensuretheperformanceoftheSE-1200,pleasereadthis
manualthoroughly.

WarningsandCautions
Inthisdocumentprecautionsareclassifiedintotwo
categories:WARNINGandCAUTION.Thisdependson
thedegreeofdangerordamagepossibleiftheprecautionis
ignoredandtheproductisusedincorrectly.
WARNING
CAUTION
Thissymbolisusedtoindicateprecautions
wherethereisariskofdeathorserious
personalinjurytotheoperatoriftheproductis
handledincorrectly.
Thissymbolisusedtoindicateprecautions
wherethereisariskofsomepersonalinjury
totheoperatororonlymaterialdamagetothe
productiftheproductishandledincorrectly.
r/min
ERROR
MEM
LOW
r/min
ERROR
MEM
LOW
7
1
4
9
5
2
6
38
129
62 26.4
Engine Tachometer SE-1200
6Indicator (input signal indicator)
When the detecting element is detecting the rotation signal
(ignition pulse), the LED indicator lights up.
7Battery cover
Remove this cover to replace the batteries. Use three Type
AAA dry batteries.
8MAIN display
Displays measurement values and settings.
9SUB display
Indicates the memory address (memory number), LOW
battery, and error.
Option Storage
The storage temperature range of the SE-1200 is -10℃to +60
℃. When you store it, avoid locations where the temperature is
extremely high or low or the humidity is high. Store it in a place
which is well-ventilated and not exposed to direct sunlight. If
you do not use it for a prolonged period of time, be sure to
remove the batteries to prevent accident caused by battery leak-
age, etc.
①HT-0400 : Carrying case
②HT-0003 : Soft case
The SE-1200 operates on three Type AAA batteries.
If the batteries are exhausted and the LOW mark “
LOW
”
appears, replace them with new ones. Be sure to replace all
the three batteries at the same time.
Power Supply
Battery replacement procedure
①While pushing lightly the △mark at the rear end of the
battery cover with your finger, raise it to remove.
②Put batteries properly in the battery compartment with the
correct polarity (+/-).
③Close the battery cover.
LOW
r/min
WARNING
CAUTION
Thissymbolisusedtoindicateprecautions
wherethereisariskofdeathorserious
personalinjurytotheoperatoriftheproductis

handledincorrectly.
Thissymbolisusedtoindicateprecautions
wherethereisariskofsomepersonalinjury
totheoperatororonlymaterialdamagetothe

productiftheproductishandledincorrectly.
Copyright©ONOSOKKICO.,LTD.
2007Allrightsreserved.
Digital Engine Tachometer
SE-1200
Instruction Manual
Thank you for your selection of the SE-1200 Digital En-
gine Tachometer.
To ensure the performance of the SE-1200, please read
this manual thoroughly.
Warnings and Cautions
In this document precautions are classified into two cat-
egories: WARNING and CAUTION. This depends on the
degree of danger or damage possible if the precaution
is ignored and the product is used incorrectly.
■Omission of Issuance of Certificate
This product has been tested under strict inspections for
correct operation before shipment. Please note that the
issuance of certificate is omitted.
■Warranty
1. This product is covered by a warranty for a period of one
year from the date of delivery.
2. This warranty covers free-of-charge repair during the
warranty period for defects occurred while the product is
used under correct operating conditions according to de-
scriptions in this manual and notices on the unit label.
3. For free-of-charge repair during the warranty period, con-
tact your dealer or your nearest Ono Sokki sales office
nearby.
4. Even during the warranty period, the following failures
will be handled on a fee basis.
(a) Failures or damages occurring through misuse,
misoperation, repairing without ONO SOKKI’S ap-
proval.
(b) Failures or damages occurring through mishandling
(dropping) during transportation after purchase.
(c) Failures or damages occurring by an Act of God (fires,
earthquakes, flooding, and lightening), environmen-
tal disruption, or abnormal voltage.
(d) Replenishment of expendable supplies, spare parts,
and accessories.
This guarantee covers only the performance of the product itself only.
All inconvenience by the trouble of this product is not included.
*Outer appearance and specifications are subject to change without prior notice.
HOME PAGE: http://www.onosokki.co.jp/English/english.htm
WORLDWIDE
ONO SOKKI CO., LTD.
1-16-1 Hakusan, Midori-ku,
Yokohama 226-8507, Japan
Phone : [phone]
Fax : [phone]
E-mail : ov[email protected]
B00002009 / IM06121802(1)079(MS)020
Observe the Following Points before Use
* Since the supplied batteries are samples, some may be
exhausted quickly.

1. Setting the Number of Cylinders
①Set the number of cylinders according to the type of the
engine under measurement.
At the time of shipment, a 4-stroke 1-cylinder engine is
set. Change the setting as required.
② If you press and hold the MEMORY/COND switch for at
least 2 seconds, the number-of-cylinders setup mode is
entered and the current setting is displayed in the MAIN
display. Each time you press the MEMORY/COND switch
in this mode, the number of cylinders is incremented. Set
a value according to the table above.
③When you press the power switch to return to the
measurement mode, the display value is applied. If you
perform no switch operation for 30 seconds in the setup
mode, the display value immediately before the power is
turned OFF is applied.
2. Measurement
(1) In case of a 1-cylinder engine
●Press the power switch and then bring the detecting
element close to the high-tension cords (ignition cords) of
the engine as shown in Fig. A. The indicator of the SE-
1200 starts blinking.
●When you bring the SE-1200 closer from the position at
which the indicator started blinking.The indicator blinks at
fixed intervals in proportion to the rotational speed.
(However, the indicator seems to be lit when the blinking
interval remarkably shortens, i.e., at high rotational speeds.)
This position is the measurement position.
●The distance between the high-tension cords and the
measurement position depends on the engine type. A rough
standard is 30 to 200 mm.
(2) In case of a multi-cylinder engine with a distributor
●As shown in Fig. B and Fig. C, bring the SE-1200 close to the
position at which all high-tension cords of cylinders are bundled
or the high-tension cords between the distributor and the
ignition coil.
●As in the case of a 1-cylinder engine, perform measurement
by bringing the SE-1200 at the position where the indicator
blinks at fixed intervals in proportion to the rotational speed. If
the measurement distance is too far or if the SE-1200 is
brought close to the position where cords are not bundled,
the blinking interval prolongs making it impossible to uniformly
detect ignition pulse of each cylinder.
(3) In case of a multi-cylinder engine without a distributor
●With the procedures mentioned in (2), perform measurement
by bringing the SE-1200 close to the position where all high-
tension cords of cylinders are bundled.
●If there is no position where cords are bundled, the distance
between the SE-1200 and each high-tension cord is not
uniform, disturbing accurate measurement.
(4) Notes on measurement
●Make sure that there is no obstacle between the SE-1200
and the high-tension cords.
If there is an obstacle between the SE-1200 and the high-
tension cords, the rotation signal (ignition pulse) is interrupted,
disturbing accurate measurement.
●Do not put your hand on the
shaded section or the end of the
SE-1200 as shown at right.
Putting your hand on the shaded
section or the end of the SE-1200
will degrade the sensitivity,
disturbing accurate measurement.
(5) Note on use
●Do not contact the SE-1200 with the high-tension cords. In
particular, since high voltage is present near the spark plugs,
doing so may cause malfunction or failure.
If you accidentally contact the SE-1200 with the high-tension
cords and irregular display is made, turn OFF the power switch
and then back ON.
●Since the SE-1200 does not have heat resistance, do not
contact it with the high-temperature section (such as the
exhaust pipe) of the engine. Perform measurement using
enough caution with the rotating section of the engine.
1.Measurement Section
Measurement unit : 1 r/min
Measurement range :
Measurement accuracy : 100 to 12,499 r/min ±1 r/min
12,500 - 20,000 r/min ±2 r/min
Over-range display : If a measurement value exceeds each
measurement range, the MAIN display
value is fixed to the maximum value
and the ERROR mark " " ap-
pears in the SUB display.
.2.Detecting Element
Applicable engines : Gasoline engines
2-stroke (1, 2, 3, or 4 cylinders)
4-stroke (1, 2, 3, 4, 5, 6, 8, or 12 cylin-
ders)
Detection system : Detects discharge noise of the spark
plugs.
Detection distance : 30 to 200 mm
Object under detection : High-tension cords
3.Display
Number of display digits : 5 digits
Character height : 10.5 mm
Indicator : 7-segment LCD
Refresh time : 1 second (2 seconds if a detected sig-
nal exceeds 1 second)
Specifications
4.Measurement Mode
Data hold function :When measurement is completed, the dis-
play of the last measurement value is re-
tained for about 30 seconds and then au-
tomatically turns off (auto power off).
Memory function : A measurement value is stored in memory
each time the MEMORY/COND switch is
pressed. Up to 10 measurement values
can be memorized. Since these values are
stored in non-volatile memory, they are
retained even after you turn OFF the
power.
5.General Specifications
Power supply : Type AAA dry battery (x3)
Continuous operating time : About 100 hours (with alkali dry
batteries at 20 ℃)
Battery LOW display :When the battery voltage drops
to 3.3 V or lower, the LOW
mark "
LOW
" lights up.
Operating temperature range : 0 ℃to +40 ℃
Storage temperature range : -10 ℃to +60 ℃
Operating humidity range : +35 to + 85%RH (without con-
densation)
Storage humidity range : +35 to +85%RH (without con-
densation)
Mass : About 90 g (dry batteries not
included)
Dimensions : 129 x 62 x 26.4 mm
Operations
Measurement
Range (r/min)
100 to 20,000
100 to 20,000
100 to 20,000
100 to 20,000
100 to 20,000
100 to 20,000
100 to 15,000
100 to 10,000
2-stroke
1 cylinder
2 cylinders
3 cylinders
4 cylinders
4-stroke
1 cylinder
2 cylinders
3 cylinders
4 cylinders
5 cylinders
6 cylinders
8 cylinders
12 cylinders
Number of
Cylinders
- 1
1 2
- 3
2 4
- 5
3 6
4 8
- 12
3. Measurement Value Memory Function
(1) Memorizing Measurement Values
①To memorize the current measurement value, press the
MEMORY/COND switch in the measurement mode.
②When the measurement value has been memorized, the
number value in the SUB display is incremented.
③Up to 10 measurement values can be memorized.
When you press the MEMORY/COND switch after
memorizing 10 measurement values, "FULL" is displayed in
the MAIN display for about a second, indicating that no more
values can be memorized.
(2) Calling Measurement Values
①Memory values can be called by pressing the RECALL/CLR
switch in the measurement mode.
The memory number is displayed as "MEM XX" (for example,
MEM 5) in the SUB display.
②Memory values are called from the latest memory number
and then in order of memory number, MEM 1, MEM 2, MEM
3, ... and MEM 10.
③If there are three memory values, the value of MEM 3 is
displayed first. Then, the SUB display displays MEM 4 and
the MAIN display displays "-----" indicating that there is no
measurement value memorized. Therefore, if there is no
memory value, "-----" is displayed for MEM 1.
④If you press the power switch to enter the measurement mode
or if you perform no switch operation for 30 seconds in the
RECALL mode to turn OFF the power, the RECALL mode is
exited.
(3) Clearing (all) memorized values
①To clear the memory contents, press the RECALL/CLR switch
for at least 2 seconds.
When the memory has been cleared, "CLr" is displayed in
the MAIN display for about one second.
4.SUB Display
■ERROR Display
If a measurement value exceeds each measurement range, the
MAIN display value is fixed to the maximum value and the ER-
ROR mark “ ” appears in the SUB display.
The maximum rotational speed which can be measured by the
SE-1200 is 20,000 r/min.
■LOW Battery Display
If the LOW mark “
LOW
”lights up, it indicates that the dry batter-
ies have been exhausted.
•This mark lights up if the battery voltage drops to 3.3 V or
lower.
•If the mark lights up, immediately replace the three dry batter-
ies with new ones.
Using the exhausted batteries may disable measurement.
0 1 10 FULL
MEMORY
COND
Lastmemo-
rizedvalueMEM 1
r/min
MEM
RECALL
CLR
RECALL
CLR
Pressandholdfor
atleast2seconds
MEMORY
COND
- 12
- 1
Current
value
Pressandholdfor
atleast2seconds
Current
value
Measurement
Range (r/min)
100 to 20,000
100 to 20,000
100 to 20,000
100 to 20,000
100 to 20,000
100 to 20,000
100 to 15,000
100 to 10,000
2-stroke
1 cylinder
2 cylinders
3 cylinders
4 cylinders
4-stroke
1 cylinder
2 cylinders
3 cylinders
4 cylinders
5 cylinders
6 cylinders
8 cylinders
12 cylinders
Number of
Cylinders
- 1
1 2
- 3
2 4
- 5
3 6
4 8
- 12
Troubleshooting
Symptom
●No display
●Unstable dis-
play
●Display value
different from
actual value
Check Point
①Are batteries set ?
②Isthebatterypolaritycorrect?
③Are batteries exhausted ?
④Does the display recover after replacing the
batteries ?
①Is the measurement distance appropriate ?
②Is the SE-1200 contacted with the high-ten-
sion cords ?
③Are there any obstacles between the SE-
1200 and the high-tension cords ?
④Is your hand put on the end of the SE-1200
?
①Is the setting of the number of cylinders
appropriate ?
②Is the measurement distance appropriate ?
Countermeasure
①Set batteries.
②Change the battery polarity correctly.
③Replace all batteries with new ones.
④Perform the reset operation.
1. Remove the batteries.
2. Press and hold the power switch for several seconds.
3. Set the batteries.
①The measurable distance is 30 mm to 200 mm from
the high-tension cords. Use the SE-1200 within this
range.
②Do not contact the SE-1200 with the high-tension cords.
③Remove obstacles between the SE-1200 and the high-
tension cords.
④Do not place your hand because doing so will degrade
the sensitivity.
①Set an appropriate number of cylinders according to
the engine type under measurement.
②The measurable distance is 30 mm to 200 mm from
the high-tension cords. Use the SE-1200 within this
range.
If you perceive any abnormal condition, first check the following points. If the instrument does not operate normally after check,
contact your dealer (Ono Sokki agency) or Ono Sokki sales office nearby.
30to200mm
CAUTION
●DonotcontacttheSE-1200
withanyhigh-tensioncord.
●PositiontheSE-1200sothat
itbealmostinparallelwiththe
high-tensioncords.
BringtheSE-1200closeto

thehigh-tensioncordsunt
il
theindicatorblinksatfixed

intervals.(However,the
indicatorseemstobelitat

highrotationalspeeds.)
Indicator
High-tensioncord
Sparkplug
(Fig.A)
30to200mm
(Fig.B
)
Sparkplugs Positionatwhichallhigh-tension

cordsofcylindersarebundled
30to200mm
(Fig.C
)
High-tensioncords
betweenthedistributor

andtheignitioncoils
Tosparkplugs
Distributor
15mm