1. Sarrera
The BTMETER BT-90EPD Auto-Ranging Digital Multimeter is designed for troubleshooting electrical problems in a wide array of industrial and household devices. It is compact, lightweight, durable, and easy to operate. This multimeter can measure AC/DC current, AC/DC voltage, resistance, continuity, transistor, and diodes with high accuracy. It features Bluetooth connectivity for real-time data transmission to mobile phones (iOS & Android) and allows data export to Excel files. The device is CATIV 600V / CATIII 1000V certified for safety.
Key features include an auto-backlit LCD display for dark environments, attachable test leads, a stand for hands-free use, and protective rubber corner guards for drop protection.
2. Paketearen edukia
Paketea irekitzean, egiaztatu behean zerrendatutako elementu guztiak daudela eta egoera onean daudela:
- 1x BTMETER BT-90EPD Digital Multimeter
- 1x 9V (6F22) Battery (Pre-installed)
- 1x Pair of High-Quality Test Leads (Red and Black)
- 1x Temperature Probe
- 1x Erabiltzailearen eskuliburua
- 1x garraiatzeko maleta

Image: Contents of the BTMETER BT-90EPD package.
3. Produktua amaitu daview eta Kontrolak
Familiarize yourself with the components and controls of your BT-90EPD multimeter.

Image: Front panel of the BT-90EPD multimeter with labeled controls and input jacks.
- LCD pantaila: Neurketa-irakurketak, unitateak eta funtzio-adierazleak erakusten ditu.
- SELECT tekla: Toggles between different measurement modes within a rotary switch position (e.g., AC/DC voltage, diodoa/jarraitasuna).
- EUTSI tekla: Uneko pantailako irakurketa izozten du. Sakatu berriro askatzeko.
- RANGE tekla: Switches between auto-ranging and manual ranging modes.
- REL tekla: Activates the relative measurement function, displaying the difference from a stored reference value.
- Hz/% Key: Maiztasunaren eta betebehar-zikloaren neurketen artean txandakatzen du.
- Etengailu birakaria: Neurketa-funtzio nagusia hautatzen du (adibidez, Boltage, Korrontea, Erresistentzia, Tenperatura).
- CDS sentsorea: Light sensor for automatic backlight control.
- Sarrerako Jackak:
- VHzΩ+))|-- Input Jack: Liburukirakotage, frequency, resistance, continuity, and diode measurements.
- COM and Temperature '-' Input Jack: Common terminal for all measurements and negative input for temperature.
- µAmA/BATT and Temperature '+' Input Jack: Mikroarentzatampere, miliampere, battery test, and positive input for temperature.
- 20A-ko sarrera-jack-a: Korronte handiko (20A-raino) neurketetarako.
4. Konfigurazioa
4.1. Bateriaren instalazioa
The BT-90EPD comes with a pre-installed 9V (6F22) battery. If replacement is needed:
- Ziurtatu multimetroa itzalita dagoela eta proba-kableak deskonektatuta daudela.
- Bilatu bateriaren konpartimentua unitatearen atzealdean.
- Kendu eusteko torlojua(k) eta kendu bateriaren estalkia.
- Carefully remove the old battery and replace it with a new 9V (6F22) battery, observing polarity.
- Jarri bateriaren estalkia berriro eta finkatu torloju(ekin).

Image: Back of the BT-90EPD multimeter showing battery compartment access.
4.2. Proba-kableak konektatzea
Konektatu beti proba-kable beltza COM jack. Connect the red test lead to the appropriate input jack based on the measurement type:
- Voltage, Resistance, Frequency, Duty Cycle, Diode, and Continuity measurements, connect the red lead to the VHzΩ+))|-- jack.
- Mikroarentzatampere (µA), milliampere (mA), and Battery tests, connect the red lead to the µAmA/BATT jack.
- For high current (up to 20A) measurements, connect the red lead to the 20A jack.
5. Funtzionamendu-argibideak
5.1. Basic Measurements
To perform basic measurements:
- Turn the rotary switch to the desired function (e.g., V~ for AC Voltage, V- DC bolumenerakotage, Ω Erresistentziarako).
- Connect the test leads to the appropriate input jacks and then to the circuit or component under test.
- Irakurri neurketa-balioa LCD pantailan.

Image: Measuring resistance with the BT-90EPD multimeter.
5.2. Tenperaturaren Neurketa
Tenperatura neurtzeko:
- Turn the rotary switch to the Temperature (℃/℉) function.
- Konektatu tenperatura-sonda COM (negative) and µAmA/BATT and Temperature '+' (positive) jacks.
- Place the tip of the temperature probe on or in the object whose temperature is to be measured.
- Read the temperature value on the LCD display. Use the SELECT button to toggle between Celsius and Fahrenheit if available.

Image: Measuring liquid temperature using the BT-90EPD multimeter and its probe.
5.3. Battery Testing (1.5V~12V)
To test battery voltage:
- Biratu etengailua BAT function (usually combined with µA/mA).
- Konektatu probako kable beltzara COM jack-a eta proba-kable gorria µAmA/BATT jack.
- Konektatu proba-kable gorria bateriaren terminal positibora eta proba-kable beltza terminal negatibora.
- Irakurri bateria voltage LCD pantailan.

Image: Testing a 9V battery with the BT-90EPD multimeter.
5.4. Bluetooth App Connection and Data Logging
The BT-90EPD can connect to your smartphone for remote monitoring and data logging.
- Download the 'iMultimeter' app from your mobile phone's app store (iOS/Android). You can find the app via this link: iMultimeter App.
- Ziurtatu Bluetootha gaituta dagoela zure telefonoan.
- Turn on the BT-90EPD multimeter.
- Open the 'iMultimeter' app on your phone and follow the in-app instructions to connect to your device.
- Once connected, you can remotely monitor measurements, log data, view on-screen graphs, and export data in EXCEL or TXT files.

Image: Screenshots of the iMultimeter mobile application interface.
5.5. Auto Backlight Display
The multimeter features an auto-backlight display that senses ambient brightness and automatically turns the backlight ON or OFF, improving readability in various lighting conditions without manual intervention.
5.6. Datuak gordetzea
Sakatu EUTSI button to freeze the current reading on the display. This is useful for recording measurements in situations where it's difficult to view the display directly. Press EUTSI again to resume live readings.
5.7. Relative Value Measurement
The REL function allows you to measure a value relative to a stored reference value. Press the REL button to store the current reading as a reference. Subsequent measurements will display the difference from this reference. Press REL again to exit relative mode.
6. Segurtasun informazioa
To ensure safe operation and avoid damage to the meter, observe the following safety precautions:
- Always ensure the multimeter is set to the correct function and range before making a measurement.
- Inoiz ez aplikatu liburukiatage or current that exceeds the maximum rated input for any function.
- Oso kontuz ibili voltag60V DC edo 30V AC RMS-tik gorako tentsioak, deskarga elektrikoaren arriskua baitakarte.
- Ez erabili neurgailua berak edo proba-kableek hondatuta badaude.
- Ensure the test leads are fully seated in the input jacks.
- Funtzioak edo tarteak aldatu aurretik, deskonektatu proba-kableak zirkuitutik.
- Irakurketa zehatzak bermatzeko, ordezkatu bateria berehala bateria baxuaren adierazlea agertzen denean.
- Jarraitu tokiko eta nazioko segurtasun-kode guztiak.
7. Mantentzea
7.1. Garbiketa
Garbitu kasua iragarkiarekinamp cloth and mild detergent. Do not use abrasives or solvents. Periodically clean the input jacks with a cotton swab and alcohol to prevent poor contact from dirt or moisture.
7.2. Bateria ordezkatzea
Refer to Section 4.1 for instructions on replacing the 9V battery when the low battery indicator is displayed.
7.3. Fusiblearen ordezkapena
If the current measurement function fails, the fuse may need replacement. Fuse replacement should only be performed by qualified personnel. Refer to the specifications for the correct fuse type and rating.
8. Arazoak
If the multimeter does not function correctly, check the following:
- Ez dago pantailarik edo pantaila ahula: Egiaztatu bateria. Ordeztu behar izanez gero.
- Irakurketa okerrak:
- Ensure test leads are correctly connected to the appropriate input jacks.
- Verify the rotary switch is set to the correct measurement function and range.
- Check for damaged test leads.
- Korrontearen neurketak ez du funtzionatzen: Egiaztatu fusiblea.
- Bluetooth konexio arazoak:
- Ensure Bluetooth is enabled on your phone and the multimeter.
- Restart both the multimeter and the phone app.
- Ensure the phone is within the specified range (32.8 ~ 49.2 ft).
9. Zehaztapenak
| Parametroa | Balioa |
|---|---|
| Barrutiaren hautaketa | Automatikoki |
| Gehienezko pantaila | 4000 zenbaketa |
| DC bolumenatage | 400 mV ~ 1000 V |
| AC Boltage | 4V ~ 750V |
| Korronte DC | 400uA ~ 20A |
| AC korrontea | 400uA ~ 20A |
| Erresistentzia | 400ohm ~ 40Mohm |
| Kapazitatea | 51.2nF ~ 100uF |
| Maiztasuna | 5.12 Hz ~ 5.12 MHz |
| Betebehar Zikloa | % 0.1 ~ % 99.9 |
| Tenperatura | -20 ℃ ~ 1000 ℃ (-4 ℉ ~ 1832 ℉) |
| Auto LCD Backlight | Bai |
| Gainkargaren babesa | Bai |
| Datuak gordetzea | Bai |
| Diodo proba | Bai |
| Bateria baxuaren adierazlea | Bai |
| Itzali automatikoa | Bai |
| ℃/℉ hautaketa | Bai |
| Balio erlatiboa | Bai |
| Mobile Phone APP (Bluetooth) | Bai |
| Bateria proba | 1.5V ~ 12V |
| Jarraitasun proba | Bai |
| Elikatze Hornidura | 9V (6F22) * 1pcs |
| Elementuaren pisua | 150 gramo |
| Paketearen neurriak | 9.37 x 5.83 x 2.44 hazbete |
10. Bermea eta Laguntza
BTMETER products are designed for reliability and performance. For warranty information or technical support, please refer to the documentation included with your purchase or contact BTMETER customer service directly. Contact details can typically be found on the official BTMETER webgunea edo zure dendariaren bidez.