DT 65 - Rangefinder PCE Instruments - Free user manual and instructions

Product Type	Contact and Non-Contact Tachometer
Model	DT 65
Display	5-digit LCD with backlight
Accuracy	±(0.05% + 1 digit)
Contact RPM Range	2 to 20,000 RPM
Non-Contact RPM Range	2 to 99,999 RPM
Revolution Range (REV)	1 to 99,999
Resolution	0.1 RPM (2 to 9,999.9 RPM), 1 RPM (≥10,000 RPM)
Sampling Time	0.5 seconds (≥120 RPM)
Detecting Distance (Non-Contact)	50 mm to 500 mm
Measurement Modes	RPM, rpm, Hz, M/M, I/M, F/M, Y/M, REV, M, In, FT, Yd
Memory	40 readings: 10 MAX, 10 MIN, 10 AVG, 10 DATA
Laser Sighting	Yes (Class II laser)
Time Base	Quartz crystal
Power Supply	9V battery (approx. 45 mA consumption)
Operating Temperature	0°C to 50°C (32°F to 122°F)
Dimensions (Approx.)	150 x 60 x 30 mm
Weight (Approx.)	200 g (including battery)
Maintenance	Keep dry; avoid liquids and moisture; remove battery if not used for extended periods
Safety	Do not point laser at eyes; avoid looking directly into beam
Spare Parts / Accessories	Contact adapters, reflective tape, 9V battery (all included)
Warranty	Refer to manufacturer's warranty policy

Frequently Asked Questions - DT 65 PCE Instruments

What is the difference between contact and non-contact measurement?

Non-contact uses a laser and reflective tape to measure RPM from a distance (50-500 mm). Contact requires attaching a physical adapter to the shaft of the object.

How do I attach the reflective tape for non-contact measurement?

Cut a 12 mm square of tape and apply it to the rotating shaft. Ensure the surface is clean and non-reflective; cover reflective shafts with black tape first.

What do the different measurement modes mean?

RPM (non-contact), rpm (contact), Hz (frequency), M/M (meters/min), I/M (inches/min), F/M (feet/min), Y/M (yards/min), REV (total revolutions), M/In/FT/Yd (length measurements). Use MODE button to switch.

How do I store and recall measurements?

Press MEAS to take a reading, then press MEM to store. The device stores MAX, MIN, AVG, and DATA for that set. To recall, press MEM repeatedly to cycle through Data0-9 and their statistics.

What battery does the DT 65 use and how long does it last?

It uses a standard 9V battery. Current consumption is about 45 mA, so a typical alkaline battery can last several hours of continuous use.

How accurate is the DT 65 tachometer?

Accuracy is ±(0.05% of reading + 1 digit). For example, at 1000 RPM, the error is ±0.5 RPM plus one digit.

What is the maximum RPM I can measure?

For contact measurement, up to 20,000 RPM; for non-contact, up to 99,999 RPM.

Can I use this tachometer for very low RPM measurements?

Yes, down to 2 RPM. For very low RPM, attach multiple reflective marks evenly and divide the reading by the number of marks for accurate results.

What does the "BAT" indicator mean?

It appears when the battery voltage is low. Replace the 9V battery to ensure accurate measurements.

Is the laser safe?

The laser is Class II, which is safe for momentary exposure but avoid pointing it into eyes. Never stare directly into the beam.

USER MANUAL DT 65 PCE Instruments

Contact/Non-Contact Tachometer Instruction Manual

1 FEATURE

* The Digital Tachometer provides fast and accurate Contact and Non-Contact RPM and surface speed measurements of rotating objects.

* Measurement type: Rotation Speed (RPM,rPm), Total revolutions (REV), Frequency(HZ), Surface Speed(M/M,I/M,F/M,Y/M) and Length(M,In,FT,Yd).

* Wide measure range and high resolution.

* High visible digital LCD and Backlight display.

* 40 reading memories : 10 selectable MAX measurements, 10 selectable MIN measurements, 10 selectable AVG measurements, 10 selectable DATA measurements.

* Laser sighting.

2 SPECIFICATIONS

Display: 5 digits LCD display.

Accuracy: ±(0.05%+1 digits).

Contact Test rang: 2 to 20,000RPM

Non-Contact Test rang: 2 to 99,999RPM

Tot test rang: 1 to 99,999.

Resolution: 0.1 RPM (2 to 9999.9 RPM).

1 RPM. (over 10000 RPM)

Sampling time: 0.5 sec. (over 120 RPM)

Detecting distance: 50mm to 500 mm.

Time base: Quartz crystal

Power consumption: Approx 45mA

Battery: 9V

Operation temp: 0^ C to 50^ C(32 to 122^ F)

3 Operation

* Flip open the battery compartment cover and install a 9V Battery.

* Non-Contact: Stick the self-adhesive reflective tape on the object whose rotational speed is to be measured. The reflective tape should be stocked as close to the outer edge of the object to be measured as possible.

* Contact: Attach the contact adapter to the tachometer. Select the adapter included and slides it onto the shaft of the contact adapter. Align the adapter with the alignment pin on the shaft of the contact adapter.

* Press the “MEAS” button .Point the laser spot at the object or bring the contact probe to the object .Then read the measurement on the LCD display.

4 Function Description

In scan mode, the current measurement is displayed on the main display. The main display will hold the last values until the tachometer automatically turns off.

* Data Storage: Press the “MEAS” button until the reading displayed on the LCD display. Observe the reading and press the “MEM” bottom to record. The maximum, minimum, average and data during one shot measurement will be stored into a memory set. Then the Data numer will increase by one.

Recall Data: Use the “MEM” botton to scroll and view the stored data point. Press the “MEM” button once to next storage, you will view the MAX measurements, MIN measurements, AVG measurements and DATA measurements. Press the “MEM” button and don’t to

release it to leap to next Data Set. You will view Data0 to Data9 ,10 selectable Data measurements.

graph TD
    subgraph "Press the 'MEM' button_once_to_next_Storage["chart 1""]
        A["Data0"] --> B["MAX Data0"] --> C["MIN Data0"] --> D["AVG Data0"]
        E["Data1"] --> F["MAX Data1"] --> G["MIN Data1"] --> H["AVG Data1"]
    end
    subgraph "Press the 'MEM' button and don't_release_it["chart 2"]"]
        I["Data0"] --> J["MAX Data0"] --> K["MIN Data0"] --> L["AVG Data0"]
        M["Data1"] --> N["MAX Data1"] --> O["MIN Data1"] --> P["AVG Data1"]
        Q["Data9"] --> R["MAX Data9"] --> S["MIN Data9"] --> T["AVG Data9"]
    end

* Measurement Mode Switch: Release the “MEAS” button and press the “MODE” button before the instrument auto power off(released the “MEAS” button this instrument will auto power off in 15 sec).There are two group of measurement. You can press the “MODE” button once to change from RPM,rpm,HZ,...to the next sequentially. Press the “MODE” button and hold for

approx.3 sec to leap to the next group .Then you can press the “MODE” button once to change from REV,M,In....to the next sequentially. Selected the mode of you need, depress the “MEAS” start measures.

graph TD
    A["RPM"] --> B["rpm"]
    B --> C["HZ"]
    C --> D["M/M"]
    D --> E["I/M"]
    E --> F["F/M"]
    F --> G["Y/M"]
    H["REV"] --> I["M"]
    I --> J["In"]
    J --> K["FT"]
    K --> L["Yd"]
    L --> A
    style A fill:#f9f,stroke:#333
    style H fill:#f9f,stroke:#333
    note right of A "Press for 3 sec"

* RPM: Non-Contact revolutions per minute measurements.

* rpm: Contact revolutions per minute measurements.

* HZ : Non-Contact /Contact frequency measurements.

* M/M: Contact Meter per minute measurements.

* I/M: Contact Inch per minute measurements.

* F/M : Contact Feet per minute measurements.

* Y/M: Contact Yard per minute measurements.

* REV: Revolution measurements.

* M : Length measurements in the uit of meter.(Using the master 10cm circumference wheel.)

* In : Length measurements in the uit of inch. (Using the master 10cm circumference wheel.)

* FT : Length measurements in the uit of feet. (Using the master 10cm circumference wheel.)

* Yd : Length measurements in the uit of yard. (Using the master 10cm circumference wheel.)

5 MEASURING CONSIDDERTATION

\*Reflective mark

Cut and adhesive tap provide into approx 12mm (0.5") squares and apply one square to each rotation shaft.

a. The non-reflective area must always be greater than the reflective area.

b. If the shaft is normally reflective, it must be covered with black tape or black paint before attaching reflective tape

c. Shaft surface must be clean and smooth before applying reflective tape.

\*VERY LOW RPM MEASUREMENT

As it is easy to get high resolution and fast sampling time. If measuring the very low RPM values, suggest user to attach more “REFLECTIVE MARKS” averagely. Then divide the reading shown by the number of “REFLECTIVE MARKS” averagely. Then divide the reading shown by the number of “REFLECTIVE MARKS” to get the real RPM

6 warnings

To avoid injuries to animal or human eyes, Please do not point the laser beam in eyes or look directly into beam. If the instrument is not to be used for any extended period, Please remove battery.

NOTE:

* If the battery current is weak, you will view the "BAT" on the LCD when you Press "MEM" bottom to measure.

* Be careful not to allow any liquids or moisture to get inside the tachometer.