OPPAMA PET-2000DX (01) PDF MANUAL

OPPAMA PET-2000DX (01) PDF SUMMARY:

What is the function of the OPPAMA pulse engine tachometer?

The OPPAMA pulse engine tachometer is a pulse counting type that detects pulses generated when ignition plugs are ignited.

What can you do when using this tachometer?

When using this tachometer, you can measure and store the maximum R.P.M. of an engine at two different times. This allows you to diagnose the engine’s state by comparing the two maximum R.P.M. readings. The tachometer also has an hour-meter function that stores the engine’s cumulative operating time in two ways (total and temporary) and displays the stored time in hours and minutes. It also has an automatic turning-on/off function. This tachometer can also withstand rain and water splashes under normal operation due to its waterproof structure.

What are some principal examples of how to use the cumulative operating time storing function?

• For recording the daily, weekly, or monthly or longer periodical operational history of the engine or equipment mounted with the engine.
• As a yardstick for judging the periodical servicing timing or inspecting timing of the engine or equipment.
• For calculating the rental fee or leasing charge of rent or leased equipment based on the actual operating and non-contact measurement mode.

What are the names of the functions in the liquid crystal displaying section?

• Pulse
• Pulse Rate Mode indication lamp (showing arrow mark)
• “MODE” key
• “SET” key

What is the measuring position chart?

Position	Objective engine	Measurable range (R.P.M.)	Stroke	Cylinder
P1	41 4 1	100 – 30000	4	1
*P21	42 2 1	100 – 30000	2	1
P2	43 4 3	100 – 20000	4	3
*P22	44 2 2	100 – 15000	2	2
P3	45 4 5	100 – 12000	4	5
*P23	46 2 3	100 – 10000	2	3
P4	48 2 4	100 – 7500	2	4

Note: “*” mark indicates the measuring position of PET-2000DX tachometer.

What is Position Mode and when should it be selected?

This mode must be selected when you want to choose the measuring position of the tachometer based on the type of engine being measured. This should be done in accordance with the “Measuring Position chart”. You can switch to the next position by pressing the “SET” key. Once a position is selected, it will not change even if you switch to another mode or the tachometer automatically turns off.

What is Cumulative Time Mode and when should it be selected?

This mode should be selected when you want to display the engine’s cumulative operating time. You can switch between the temporary cumulative time (manually clearable) and the total cumulative time (not clearable) by pressing the “SET” key.

How do you clear the temporary cumulative time?

To clear the temporary cumulative time, press both the “MODE” and “SET” keys simultaneously.

Why might the cumulative operating time of some delivered tachometers not be zero?

The cumulative operating time of some delivered tachometers might not be zero due to delivery inspections.

What is Maximum Mode (Maximum R.P.M. Mode) and when should it be selected?

Select this mode when you want to display the maximum R.P.M of the engine. You can clear the displayed maximum R.P.M. by pressing the “SET” key.

What happens when you clear the maximum R.P.M in Maximum Mode?

When you clear the maximum R.P.M. in this mode, the second maximum R.P.M. measured in Dual Mode (described below) moves to the first maximum R.P.M. displaying section. The second maximum R.P.M. displaying section will then display “0”.

What is Dual Mode (Dual Maximum R.P.M. display Mode)?

In this mode, the tachometer displays the maximum R.P.M of the engine from the first and second measurement times. When you press the “SET” key, the maximum R.P.M. in the second display section moves to the first section, and the second section displays “0.”

What is the actual R.P.M. compared to the displayed value?

The actual R.P.M. is 100 times the displayed value.

What happens when the maximum R.P.M. is cleared in Dual Mode?

When the maximum R.P.M. is cleared in this mode, the value stored in Maximum Mode is also cleared.

What is displayed in the first maximum R.P.M. displaying section?

The first maximum R.P.M. displaying section shows the maximum R.P.M. stored at the first measurement time.

What happens in Position Mode while measuring?

You should select this mode if you need to change the measuring position while measuring. Choose the position in the same way as described in the “Position Mode” section under “While non-measuring”.

What is R.P.M. Mode and when is it selected?

R.P.M. mode displays the current R.P.M of the engine being measured. All tachometers are set to this mode at the factory. While you press the “SET” key, Maximum Mode will be selected, and the maximum R.P.M. will be displayed.

What is Cumulative Time Mode and when should it be selected while measuring?

Select this mode when you want to display the engine’s cumulative operating time while measuring. The setting method and precautions for this mode are the same as those described in the “Cumulative Time Mode” section under “While non-measuring.”

How is the cumulative operating time affected at measuring time?

The cumulative operating time is stored and updated in any mode at measuring time.

What is Maximum Mode and when should it be selected while measuring?

Select this mode when you want to display the engine’s maximum R.P.M. while measuring. The setting method and precautions for this mode are the same as those described in the “Maximum Mode” section under “While non-measuring”.

How is the maximum R.P.M. affected during measurement?

The maximum R.P.M. is stored and updated in any mode during measurement.

What indicates measurement during measurement?

During measurement, a bar at the top left side of the display flickers.

What is the Key Operation Flow Chart during non-measuring?

Display Indication	Key Operation	Note
*P1: n1	Press “MODE” key.	Indication that the selected engine type is a 2-stroke 2-cylinder or 4-stroke 4-cylinder type.
*P21: n1
P2: n1
*P22: n1		Note: “*” mark indicates the measuring position of PET-2000DX tachometer.
P3: n1
*P23: n1
P4: n1
0: 0 0 0	Press “MODE” key.	Total cumulative time.
0: 0 0 1	Press “MODE” key.	Temporary cumulative time. (Clearable with both “MODE” and “SET” keys pressed.)
12340	Press “MODE” key.	Display is cleared to “0” by pressing “SET” key.

What is Dual Mode and when should it be selected while measuring?

This mode should be selected when you want to display both the current R.P.M. and maximum R.P.M. of the engine during measurement.

What is displayed in Dual Mode while measuring, and how is the actual engine R.P.M. calculated?

This mode displays the measured maximum R.P.M. and the current R.P.M. The actual R.P.M. of the engine is calculated by multiplying the displayed value by 100.

How do you clear the maximum R.P.M. in Dual Mode while measuring?

You can clear the maximum R.P.M. by pressing the “SET” key.

How are the modes of this tachometer divided, and how should you set a desired mode?

The tachometer’s modes are divided into two cases: during non-measuring time and measuring time. To set the desired mode, refer to the Key Operation Flow Charts and choose a mode that suits your needs. You can perform the key operation (mode switching) while the tachometer is measuring. Once a mode is selected, it will be automatically displayed based on whether or not there are any inputted pulses.

What is the Key Operation Flow Chart while measuring?

Display Indication	Key Operation	Note
*P1: n1	Press “MODE” key.	Indication that the selected engine type is a 2-stroke 2-cylinder or 4-stroke 4-cylinder type.
*P21: n1
P2: n1
*P22: n1		Note: “*” mark indicates the measuring position of PET-2000DX tachometer.
P3: n1
*P23: n1
P4: n1
12340	Press “MODE” key.	Maximum mode is selected (the maximum R.P.M. is displayed) while “SET” key is pressed.
0: 0 0 0	Press “MODE” key.	Total cumulative time.
0: 0 0 1	Press “MODE” key.	Temporary cumulative time. (Clearable with both “MODE” and “SET” keys pressed.)
12340	Press “MODE” key.	Display is cleared to “0” by pressing “SET” key.
Flickering bar

How to measure the speed of a four-stroke, three-cylinder engine?

1. Set the measuring position. Based on the “Measuring Position Chart”, a four-stroke, three-cylinder engine corresponds to position P2.
2. Turn the tachometer on. This is done automatically when pulses are detected from the engine.
3. Select R.P.M. Mode. All tachometers are set to this mode by default, but if you are in a different mode, press the “MODE” key until the display shows the current R.P.M.
4. Point the antenna lead wire at the engine’s spark plug wires. The tachometer measures the engine speed by detecting the pulses generated by the spark plugs.
5. Read the R.P.M. value on the display. The displayed value represents the engine speed in hundreds of R.P.M. For example, if the display shows “150”, the engine is running at 15,000 R.P.M.
6. Switch to Maximum Mode to record the maximum R.P.M. Press and hold the “SET” key to display the maximum R.P.M. recorded during the measurement.
7. Clear the maximum R.P.M. if needed. Press the “SET” key while in Maximum Mode to reset the maximum R.P.M. value to “0”.

How to view the cumulative operating time of an engine?

1. Ensure the tachometer is on. It will turn on automatically if it is receiving pulses from the engine.
2. Select Cumulative Time Mode. Press the “MODE” key repeatedly until the display shows “0: 0 0 0” or “0: 0 0 1”, representing total and temporary cumulative time, respectively.
3. Switch between total and temporary time. Press the “SET” key to toggle between displaying the total cumulative operating time (“0: 0 0 0”) and the temporary cumulative time (“0: 0 0 1”).
4. Read the cumulative operating time. The display will show the cumulative time in hours and minutes (e.g., “123: 45” represents 123 hours and 45 minutes).
5. Clear the temporary cumulative time if desired. Simultaneously press and hold the “MODE” and “SET” keys to reset the temporary cumulative time to “0: 0 0 0”.

How to compare the maximum R.P.M. of an engine from two separate measurements?

1. Perform the first measurement. Follow the steps outlined in the “How to measure the speed of a four-stroke, three-cylinder engine” section to measure the engine speed and record the maximum R.P.M.
2. Switch to Dual Mode. Press the “MODE” key repeatedly until the display shows two R.P.M. values, one for the first measurement and one for the second (currently “0”).
3. Perform the second measurement. Allow the tachometer to continue measuring the engine speed. The second maximum R.P.M. value will update in the second display section.
4. Compare the two maximum R.P.M. values. The display will show the maximum R.P.M. recorded from the first measurement in the first section and the maximum R.P.M. from the second measurement in the second section.
5. Transfer the second maximum R.P.M. to the first section. Press the “SET” key to move the second maximum R.P.M. value to the first section and reset the second section to “0”.
6. Clear the maximum R.P.M. values if needed. To clear both maximum R.P.M. values, switch to Maximum Mode (single maximum R.P.M. display) and press the “SET” key. This will reset both values to “0”.

How to change the measuring position during measurement?

1. Select Position Mode while measuring. Press the “MODE” key repeatedly until the display shows the current measuring position (e.g., “*P2”).
2. Choose the desired measuring position. Press the “SET” key repeatedly to cycle through the available measuring positions, referring to the “Measuring Position Chart” to select the appropriate position for your engine.
3. Confirm the new measuring position. The display will show the newly selected measuring position. The tachometer will now measure the engine speed based on the new position.

How to use the tachometer’s automatic on/off feature?

The tachometer automatically turns on when it detects pulses from the engine’s spark plugs, indicating the engine is running. It also automatically turns off after a period of inactivity (no pulses detected), conserving battery power. No specific user interaction is required for this feature.

How to interpret the flickering bar during measurement?

The flickering bar at the top left corner of the display serves as a visual indicator that the tachometer is actively measuring and receiving pulses from the engine. If the bar is not flickering, it indicates that the tachometer is not receiving pulses or is not in a measuring mode.

How to troubleshoot common issues with the tachometer?

• No display or erratic readings: Check the battery connection and ensure the batteries are properly installed and have sufficient charge.
• Inaccurate readings: Verify that the measuring position is set correctly for your engine type according to the “Measuring Position Chart”. Ensure the antenna lead wire is properly positioned and pointed towards the engine’s spark plug wires.
• Tachometer not turning on: Ensure the engine is running and generating pulses. Check the battery connections and battery charge.
• Cumulative time not recording: Make sure the tachometer is receiving pulses from the engine while running. Verify that Cumulative Time Mode is selected.
• Difficulty clearing maximum R.P.M.: Ensure you are in the correct mode (Maximum Mode or Dual Mode) when attempting to clear the maximum R.P.M. value.

How to maintain and care for the tachometer?

• Keep the tachometer clean and dry. Wipe off any dirt or debris with a soft, dry cloth. Avoid using harsh chemicals or solvents.
• Store the tachometer properly when not in use. Store it in a dry, cool place, away from direct sunlight and extreme temperatures.
• Replace the batteries when needed. Use the recommended battery type and ensure they are properly installed.
• Protect the tachometer from impacts and drops. Although it has a waterproof structure, avoid subjecting it to unnecessary shocks or impacts that could damage the internal components.
• Handle the antenna lead wire with care. Avoid bending or twisting the wire excessively, as this could affect its performance.

Can I use the tachometer in wet conditions?

Yes, the tachometer has a waterproof structure that allows it to withstand rain and water splashes during normal operation. However, avoid submerging it in water or exposing it to prolonged or heavy rainfall.

What is the purpose of the dual maximum R.P.M. display mode?

The dual maximum R.P.M. display mode allows you to compare the maximum engine speed recorded from two separate measurements. This is useful for diagnosing engine performance changes over time or after adjustments or repairs.

How often should I replace the batteries in the tachometer?

Battery life depends on usage and storage conditions. It is recommended to replace the batteries at least once a year or when the display starts to dim or become erratic.

Can I use the tachometer to measure the speed of any type of engine?

The tachometer is designed for use with gasoline engines that use spark plugs for ignition. It may not be compatible with diesel engines or other types of engines that do not use spark plugs.

Where can I get further assistance or support for the tachometer?

Contact information for the manufacturer, OPPAMA INDUSTRY CO., LTD., is provided in the document. They can provide further assistance and support for the product.

How do I measure using the F-1 Non-contact Measurement?

1. Turn on the power supply by pressing “MODE” key.
2. Select the PoSition mode by referring to Section E “How to set Mode” and select the measuring position corresponding to an engine to be measured.
3. Locate the tachometer close to the ignition plug cord of the engine (locate the tachometer from 1 cm to 30 cm apart from the cord and where the R.P.M. display comes to stable) with the arrow mark painted to the cord as shown in Fig.4. For a multicylinder engine, locate the tachometer close to the binding location of all ignition plug cords. The tachometer displays R.P.M. of the engine while it is held at an appropriate distance.
4. When the tachometer is moved away from the ignition plug cord of the engine or the engine is stopped, the mode is automatically switched to the mode set while non-measuring time and the displayed contents disappears about one minute later.

How do I measure using the F-2 Contact Measurement?

1. Attach the antenna lead wire to the tachometer as shown in Fig. 5.
2. Fix the tachometer to an engine or to an appropriate location of the equipment mounted with the engine with the supplied magic tape. (Velcro tape).
3. Attach the antenna lead wire to the ignition plug cord with the clip as shown in Fig. 5 or wind the lead wire around the cord three to five turns after removing the clip from the lead wire, and fix the lead wire with an insulating tape, etc. For a multicylinder engine, lay the lead wire so that the wire passes close to all ignition plug cords.
4. Select the position mode by referring to Section E “How to set Mode” and the measuring position corresponding to the engine.
5. When the engine is started, the tachometer shows R.P.M. of the engine.
6. When the engine is stopped, the mode is automatically switched to the mode set while non-measuring time and the display is cleared about one minute later.

What are the Precautions for G-1 Signal Detecting Location?

1. For a multicylinder engine, locate the tachometer close to the location where all ignition plug cords gather, with the arrow mark on the cord side. When the contact measurement is selected, attach the lead wire to one of the cords with the clip or wind the lead wire around the cord and fix the lead wire with an insulating tape, etc. Where the plug cords are separated from each other, the displayed R.P.M. may become erroneous. When this happens, select a pulse detecting location so that the antenna lead wire passes close to all ignition plug cords.
2. For an automobile engine, etc., provided with a distributor, do not select a location near the distributor or ignition coil as the pulse detecting location, because the displayed R.P.M. may become erroneous. For such an engine, select the pulse detecting location so that the tachometer will not be affected by the distributor and coil.

How do I Select “Position” for G-2?

1. The “Position” must be selected on the basis of the basic number of ignitions of an engine to be measured. When plural cylinders are simultaneously ignited in a multicylinder engine, change the measuring “Position”. Example: Select “Position” “P21:42” when the displayed R.P.M. shows 1/2 of the true R.P.M. at “Position” “P22:44”.
2. Some engines have an ignition system which ignites 2 times of normal ignition system. And the displayed R. P.M. shows 2 times of the right value, in such a case change the “Position” to the “Position” corresponding to the double number of cylinders. Example: When R.P.M. measured at “Position” “P21:42” is to be doubled for display, change the “Position” to “P22: 44”.
3. For a four-cycle one-cylinder engine using a magneto-ignition system, try to measure R.P.M. at “Position” “P21:32”, because, in many cases, the number of ignitions is the same as that of a two-cycle one-cylinder engine.
4. The “Position” must be selected carefully, because the cases described in (1) to (3) above may exist in a combined state.

What are the G-3 Precautions for Use?

1. Carefully wire the antenna lead wire so that it will not come into contact too much with any metallic part, water, etc., because the pulses are damped and the displayed R.P.M. may become smaller than the proper value.
2. When the engine to be measured is of a racing car (especially, kart engine), the displayed R.P.M. sometimes may become larger than the proper value, because the pulses produced might be stronger than those of ordinary engines. In such a case, wind the antenna lead wire around a metallic frame, etc., by three to six turns to weaken pulses.
   • Do not wind the lead wire excessively, because the displayed R.P.M. MAY become smaller than the right value.
3. The phenomenon described in (2) above may also occur when the ignition plug cord deteriorates with time. In this case, take the same action as that described in (2) above.
4. When the non-contact measurement is selected, no measurement is possible when such an obstacle as the finger, etc., exists in front of the pulse receiving direction arrow mark.
5. The displayed R.P.M. may become larger than the right value immediately after starting the measurement.
6. This tachometer is made by waterproof structure and can withstand rains and splash of water under normal operation. However, do not use the tachometer underwater. When the tachometer gets wet with water, remove the water with a piece of dry cloth as soon as possible.
7. It may happen, although very rarely, that the stored data are erased depending upon the type of the engine to be measured. When the erasure of the stored data is foreseen, use a resistor spark plug.
8. Do not give any strong shock to the tachometer.
9. This tachometer can not be disassembled.
10. When a failure seems to be occurred, try to follow this manual properly and, still the tachometer does not work properly, contact our sale agency or our company. Do not repair nor disassemble your tachometer by yourself, because we will not guarantee any damage caused by the repair or disassembly made by yourself.

What do I do when the tachometer is brought close to the ignition plug cord (Non-contact measurement) and the tachometer does not make any display?

• Confirm that R.P.M. mode is selected.
• Confirm that the arrow mark is directed to the ignition plug cord of the engine to be measured.
• Confirm that your finger does not obstruct the arrival of pulses.
• Confirm that the distance to the plug cord is appropriate.

What do I do when the tachometer is brought close to the ignition plug cord (Non-contact measurement) and the tachometer does not display proper R.P.M.?

• Confirm that the selected “Position” matches the engine to be measured.
• Confirm that the arrow mark is directed to the ignition plug cord of the engine to be measured.
• Confirm that your finger does not obstruct the arrival of pulses.
• Confirm that the distance to the plug cord is appropriate.
• Confirm that no distributor exists near your tachometer.

What do I do when the antenna lead wire is used (Contact measurement) and the tachometer does not make any display?

• Confirm that R.P.M. mode is selected.
• Confirm that the antenna lead wire is attached to your tachometer in the manner shown in Fig. 5.
• Confirm that the antenna lead wire is attached to the ignition plug cord of the engine to be measured in the manners shown in Figs. 5 and 6.
• Increase the number of turns of the antenna lead wire, when the lead wire is wound around the ignition plug cord.

What do I do when the antenna lead wire is used (Contact measurement) and the tachometer does not display proper R.P.M.?

• Confirm that the selected “Position” matches the engine to be measured.
• Confirm that no distributor exists near your tachometer and antenna lead wire.

What is the Specification for a 2100DX?

Stroke	Cylinder
2 (4)	1 or 2
4	2 or 4
2	1 to 4
4	1 to 6 or 8
Displaying interval	0.5 sec.
Accuracy	±10rpm (20pm for 4-stroke 1-cylinder engine)
	±10rpm in dual display mode.
Maximum R.P.M.	Measured and stored.
TEMPORARY	0 : 00 → 999 : 59
Cumulative time (H) (M) display	TOTAL
	L 0000:00 – 9999:59
Battery life	Approx. 20,000 hr (Measuring hour)
Working temp. range	-20°C to +65°C
Storage temp. range	-20°C to +85°C
Dimensions (LxWxH)	44x61x12mm
Main unit weight	30g
Accessories	One antenna lead wire,
	One magic tape (Velcro tape), and
	One instruction manual.

What is the Specification for a 2000DX?

Stroke	Cylinder
2 (4)	1 or 2
4	2 or 4

Displaying interval	0.5 sec.
Accuracy	±10rpm (20pm for 4-stroke 1-cylinder engine)
	±10rpm in dual display mode.
Maximum R.P.M.	Measured and stored.
TEMPORARY	0 : 00 → 999 : 59
Cumulative time (H) (M) display	TOTAL
	L 0000:00 – 9999:59
Battery life	Approx. 20,000 hr (Measuring hour)
Working temp. range	-20°C to +65°C
Storage temp. range	-20°C to +85°C
Dimensions (LxWxH)	44x61x12mm
Main unit weight	30g
Accessories	One antenna lead wire,
	One magic tape (Velcro tape), and
	One instruction manual.