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P3250-1M
Multimeter digital "BT", True RMS
User Manual
July 2019 edition V1.0.3
Copyright © by Fruhmann GmbH, Austria. All rights reserved.
The information in this manual was correct at the time of printing. However, Fruhmann GmbH
will continue to improve products and reserves the rights to change specification at any time
without notice.
is the registered trademark of the Fruhmann GmbH in Austria.
Fruhmann GmbH, NTL Manufacturer & Wholesaler
Katharinenweg 3
7372 Karl
Austria
Tel: +43 2617 20278
Fax: +43 2617 20278 4
Web:
www.ntl.at
E-mail: office@ntl.at
i
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Summary of Contents for NTL P3250-1M
- Page 1 The information in this manual was correct at the time of printing. However, Fruhmann GmbH will continue to improve products and reserves the rights to change specification at any time without notice. is the registered trademark of the Fruhmann GmbH in Austria. Fruhmann GmbH, NTL Manufacturer & Wholesaler Katharinenweg 3 7372 Karl Austria...
- Page 2 Parts, modules and replacement products used by NTL for warranty work may be new or reconditioned like new performance. In order to obtain service under this warranty, the Customer must notify NTL of the defect before the expiration of the warranty period. The Customer shall be responsible for packaging and shipping the defective product to the service center designated by NTL, and with a copy of customer proof of purchase.
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Page 3: Table Of Contents
Table of Contents 1.Safety Information ....................1 Safety Considerations ......................1 Measurement Category ...................... 3 Safety Terms and Symbols ....................4 2.Quick Start ........................ 5 General Inspection ......................5 Install/change the Battery ....................6 Adjusting the Tilt Stand ....................... 7 Power On/Off ........................ - Page 4 3.Making Measurements .................... 15 Measuring AC or DC Voltage ....................15 Measuring Resistance ......................15 Testing for Continuity ......................16 Testing Diodes ........................16 Measuring Capacitance ...................... 16 Measuring Frequency ......................17 Measuring Temperature ....................17 Non-Contact Voltage Detect (NCV) ..................17 Measuring DC or AC Current ....................
- Page 5 7.Technical Specifications ..................49 8.Appendix ......................... 51 Appendix A: Enclosure ....................... 51 Appendix B: General Care and Cleaning ................51 Appendix C: Changing the fuse ................... 52...
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Page 6: Safety Information
P3250-1M Multimeter digital “BT”, True RMS 1. Safety Information Safety Considerations Before any operations, please read the following safety precautions to avoid any possible bodily injury and prevent damage to this product or any other products connected. To avoid any contingent danger, use this product only as specified. - Page 7 P3250-1M Multimeter digital “BT”, True RMS When servicing the multimeter, use only the specified replacement parts. Use caution when working above 60 V DC, 30 V AC RMS, or 42.4 V peak. Such voltages pose a shock hazard.
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Page 8: Measurement Category
P3250-1M Multimeter digital “BT”, True RMS Measurement Category The multimeter has a safety rating of 1000 V, CAT III and 600 V, CAT IV. Measurement category definition Measurement CAT I applies to measurements performed on circuits not directly connected to the AC mains. Examples are measurements on circuits not derived from the AC mains and specially protected (internal) mains- derived circuits. -
Page 9: Safety Terms And Symbols
P3250-1M Multimeter digital “BT”, True RMS Safety Terms and Symbols Safety Terms Terms in this Manual. The following terms may appear in this manual: Warning: Warning indicates the conditions or practices that could result in personal injury or death. Caution: Caution indicates the conditions or practices that could result in damage to this product or other property. -
Page 10: Quick Start
If it is found that there is damage to the appearance of the instrument, or the instrument does not work normally, or fails in the performance test, please get in touch with the NTL distributor responsible for your area. If there is damage to the instrument caused by the transportation, please keep the package. Immediately inform the supplier (NTL distributor). -
Page 11: Install/Change The Battery
P3250-1M Multimeter digital “BT”, True RMS Install/Change the Battery The multimeter is powered by a 9V (6F22) battery. Warning: To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the low battery indicator appears. -
Page 12: Adjusting The Tilt Stand
P3250-1M Multimeter digital “BT”, True RMS Adjusting the Tilt Stand Pull the tilt stand outward to its maximum reach (about 70° to the meter body). Power On/Off (1) To power ON the multimeter, turn the rotary switch to any other position except (2) To power OFF the multimeter, turn the rotary switch to the position. -
Page 13: Lcd Backlight And Flashlight
P3250-1M Multimeter digital “BT”, True RMS LCD Backlight and Flashlight To implement the test among darkness, you can activate the LCD backlight and flashlight by pressing for more than 2 seconds. The backlight and flashlight will last for one minute. To turn off manually, pressing for more than 2 seconds. -
Page 14: Multimeter In Brief
P3250-1M Multimeter digital “BT”, True RMS Multimeter in Brief Front panel Figure 2-1 Front panel overview... -
Page 15: Rotary Switch
P3250-1M Multimeter digital “BT”, True RMS Description Details ① Display screen Page 12 ② Keypad Page 11 ③ Rotary switch Page 10 ④ Input terminals Page 13 ⑤ LED indicator ⑥ Non-contact voltage detector (NCV) Page 17 ⑦ Flashlight Page 8... -
Page 16: Keypad
P3250-1M Multimeter digital “BT”, True RMS Keypad Description Details Select DC or AC Select Resistance/Continuity /Diode Auto/Manual range Page 8 Backlight & Flashlight Page 8 Data Hold Page 19 Select frequency/duty cycle Page 17 Measuring frequency in AC voltage/current mode... -
Page 17: Display Screen
P3250-1M Multimeter digital “BT”, True RMS Display screen Figure 2-2 Display screen Symbol Description Details Bluetooth enabled Page 20 Auto range Page 8 Data hold enabled Page 19 Relative enabled Page 19 Diode test selected Page 16 Continuity test selected... -
Page 18: Measurement Units
P3250-1M Multimeter digital “BT”, True RMS Measurement units Sign Description Mega 1E+06 (1 000 000) kilo 1E+03 (1 000) milli 1E–03 (0.001) micro 1E–06 (0.000 001) nano 1E–09 (0.000 000 001) Sign Description Measurement type Degree Celsius ℃ Temperature Degree Fahrenheit ℉... - Page 19 P3250-1M Multimeter digital “BT”, True RMS Rotary switch Input terminals Overload protection position 750 VAC/1000 VDC 250 VAC/300 VDC 1 A/1000 V 15 A/1000 V...
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Page 20: Making Measurements
P3250-1M Multimeter digital “BT”, True RMS 3. Making Measurements Measuring AC or DC Voltage Warning: Do not measure any voltage of over 1000 VDC or 750 VAC rms to avoid instrument damage or electric shock. Do not apply more than 1000 VDC or 750 VAC rms between the common terminal and the earth ground to avoid instrument damage or electric shock. -
Page 21: Testing For Continuity
P3250-1M Multimeter digital “BT”, True RMS Testing for Continuity Caution: To avoid possible damage to your multimeter or to the equipment under test, disconnect the circuit power and discharge all high-voltage capacitors before testing for continuity. (1) Rotate the rotary switch to . -
Page 22: Measuring Frequency
P3250-1M Multimeter digital “BT”, True RMS (2) Connect the black test lead to the terminal and the red test lead to the terminal. (3) Probe the test points and read the display. Measuring Frequency (1) Rotate the rotary switch to... -
Page 23: Measuring Dc Or Ac Current
P3250-1M Multimeter digital “BT”, True RMS (1) Rotate the rotary switch to Test the NCV function on a known live circuit before use. (3) Place the top of the meter very close to the voltage source as shown in the figure. -
Page 24: Multimeter Features
P3250-1M Multimeter digital “BT”, True RMS 4. Multimeter Features Data Hold Mode (1) Press to freeze the display during measurement, will be shown on the display. (2) Press again to exit this mode. Making Relative Measurements When making relative measurements, reading is the difference between a stored reference value and the input signal. -
Page 25: To Connect With Mobile Device
P3250-1M Multimeter digital “BT”, True RMS 5. To Connect with Mobile Device This multimeter supports communication with Android or iOS based smart devices through Bluetooth. You can use the free application software on the smart devices to monitor the measurements, perform remote control, view trending graphs, etc. The recorded data can be saved as CSV file. - Page 26 P3250-1M Multimeter digital “BT”, True RMS For iPhone You can search "NTL" in the APP Store, select the APP with the icon, and then install it. Or use the QR Code below: Note: The help content below may be not completely consistent with the application software, only for reference.
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Page 27: Android App
P3250-1M Multimeter digital “BT”, True RMS Android App How to Connect with Android Device (1) Install the free application software for Android on your Android smart device. (2) Launch the "Multimeter" application (3) Turn on the multimeter, press and hold until appears on the display. -
Page 28: User Interface In Android App
P3250-1M Multimeter digital “BT”, True RMS (6) Click "BDM" in the device list to pair. User Interface in Android App Double View Double View Click to disconnect Press&hold to edit name Click to enter Single View Next Single Graph Exit/About... -
Page 29: Operations In Android App
P3250-1M Multimeter digital “BT”, True RMS Function Description Table Display Function Display Function Direct Current Measuring Capacitance Alternating Current Measuring Frequency Measuring Resistance Measuring Duty Cycle TEMP Testing Diodes Measuring Temperature BEEP Testing for Continuity Non-contact Voltage Detect Operations in Android App ... - Page 30 P3250-1M Multimeter digital “BT”, True RMS Data Graph and Table : Click to view data graph and table. Click to show setting menu. Data Graph&Table Data Graph&Table Trending graph Data table Show menu Zoom Controls Setting menu: Softkey Description Read the saved file (.CSV)
- Page 31 P3250-1M Multimeter digital “BT”, True RMS Full screen digit function Click the on the top right of the screen. The digits are displayed at maximum size. Click to turn off. If you wish to get the digits more bigger, please follow these steps: 1.
- Page 32 P3250-1M Multimeter digital “BT”, True RMS If you wish to increase the size of the digits further, please follow these steps: 1. Follow point 1 till 5 of the upper listing 2. Look here for an option named „Display size“ and tap on it 3.
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Page 33: Multimeter Offline Record (Android)
P3250-1M Multimeter digital “BT”, True RMS Multimeter Offline Record (Android) When measuring, you can use Android device APP to send a command, the multimeter will start recording the measurements. After receiving the command, the connection will be disconnected automatically. The multimeter will record the measuring data in its own memory. - Page 34 P3250-1M Multimeter digital “BT”, True RMS Selecting , the multimeter will continue recording, the connection will be aborted. (4) After completion of the record, to read the measuring data, reconnect the Android device and the multimeter. (5) In APP single view, tap on the...
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Page 35: Ios App
P3250-1M Multimeter digital “BT”, True RMS iOS App How to Connect with iOS Device (1) Install the free application software for iOS on your iOS smart device. (2) Launch the application .If the Bluetooth function is not activated, a dialog box will prompt you to turn on Bluetooth. -
Page 36: User Interface In Ios App
P3250-1M Multimeter digital “BT”, True RMS (5) Select the desired multimeter in the device list. (6) The measurements will be shown if the connection is successful. You can tap on the softkey on the right to add another multimeter. User Interface in iOS App... - Page 37 P3250-1M Multimeter digital “BT”, True RMS Multi-device View Function (Details follow) Range AUTO/MANUAL Slide up/down to show other device Slide left to show the Delete softkey Function Description Table Display Function Display Function Direct Current Measuring Capacitance Alternating Current Measuring Frequency...
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Page 38: Operations In Ios App
P3250-1M Multimeter digital “BT”, True RMS Selecting File Interface Be selected File operations Setting Interface Record interval in the Upper/lower limit Alert on/off application software Operations in iOS App Customize the meter name The device name of the meter can be customized. Press and hold the device name... - Page 39 P3250-1M Multimeter digital “BT”, True RMS Add meter : In single or multi-device view, click softkey. Select meter : In single device view, slide left or right to switch the meter view. In multi-device view, click a device item to select it, the background is turned to blue.
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Page 40: Multimeter Offline Record (Ios)
P3250-1M Multimeter digital “BT”, True RMS Multimeter Offline Record (iOS) When measuring, you can use iOS device APP to send a command, the multimeter will start recording the measurements. After receiving the command, the connection will be disconnected automatically. The multimeter will record the measuring data in its own memory. - Page 41 P3250-1M Multimeter digital “BT”, True RMS (5) In APP device view, tap on the softkey on the right, select "Record read" from the pop-up menu. The file name start with "Offline", the following part can be customized. (6) Tap on "Read data", APP will read the measuring data and save as a CSV file into the iOS device.
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Page 42: To Connect With Computer
P3250-1M Multimeter digital “BT”, True RMS 6. To Connect with Computer To connect the multimeter to a computer, the item P3250-1MA Bluetooth USB adapter must be plugged into the USB port of computer. Use only the Bluetooth USB adapter P3250-1MA. - Page 43 P3250-1M Multimeter digital “BT”, True RMS (2) Click "Next". (3) Select "I accept the agreement", and then click "Next".
- Page 44 P3250-1M Multimeter digital “BT”, True RMS (4) Select the destination folder, and then click "Next". (5) Click "Install".
- Page 45 P3250-1M Multimeter digital “BT”, True RMS (6) Uncheck "View the Release Notes", and click "Finish" to exit Setup. (7) Plug the Bluetooth USB adapter into a USB port on your computer. Right click [Computer], you can find it on the desktop, or in [Start] menu. In the drop...
- Page 46 P3250-1M Multimeter digital “BT”, True RMS Click on “Device Manager” on the left hand side. On the right hand side, double click on “Ports (COM & LPT)”. Under ports, if "TI CC2540 USB CDC Serial Port (COM#)" is displayed, that means the driver is installed successfully.
- Page 47 P3250-1M Multimeter digital “BT”, True RMS Select "Browse my computer for driver software". Select the directory path of the driver software, and click "Next".
- Page 48 P3250-1M Multimeter digital “BT”, True RMS If below message is displayed, klick on „Install“.
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Page 49: Step 3: Connect To Multimeterble Software
P3250-1M Multimeter digital “BT”, True RMS After installing successfully, click "Close". In Device Manager, check if "TI CC2540 USB CDC Serial Port (COM#)" is displayed under Ports (COM & LPT). Step 3: Connect to multimeterBLE software (1) After installing the Bluetooth USB adapter driver successfully, run the multimeterBLE software, the configure dialog box appears. - Page 50 P3250-1M Multimeter digital “BT”, True RMS (2) Turn on the multimeter, press and hold until appear on the display. (3) Click softkey on the right, a Scan Devices dialog box appears. A progress bar shows the progress of scanning multimeters. It will take a few seconds. When the scan is finished, select the desired multimeter in the device list.
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Page 51: User Interface In Multimeterble Software
P3250-1M Multimeter digital “BT”, True RMS User Interface in MultimeterBLE Software Single Device View Single Device View Move the cursor here to show , click to delete the device Add device Single device view Multi-device view Start offline record Read offline record Graph&Table view... - Page 52 P3250-1M Multimeter digital “BT”, True RMS Graph&Table View Save the displayed data into .CSV file Clear the data that is being displayed Check to auto scroll the data table Check to unify the unit types in data table Select device...
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Page 53: Multimeter Offline Record (Pc Software)
P3250-1M Multimeter digital “BT”, True RMS Multimeter Offline Record (PC Software) When measuring, you can use PC software to send a command, the multimeter will start recording the measurements. After receiving the command, the connection will be disconnected automatically. The multimeter will record the measuring data in its own memory. - Page 54 P3250-1M Multimeter digital “BT”, True RMS (5) On software interface, click softkey on the right, a dialog will show. The file name start with "Offline", the following part can be customized. (6) Click "Read Record", the software will read the measuring data and save as a CSV file into computer.
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Page 55: Technical Specifications
P3250-1M Multimeter digital “BT”, True RMS 7. Technical Specifications The accuracies indicated in the table below are related to standard conditions of 18 … 28 ℃ and a relative humidity of less than 80%. Resolu- Function Measurement Range Accuracy tion 60.00mV/600.0mV... - Page 56 P3250-1M Multimeter digital “BT”, True RMS When measuring current, for 10 A to 15 A, the measuring duration should not be over 2 minutes within 10 minutes, and in these 10 minutes, no other current should flow through except within the measuring duration; for 15 A to 20 A, the measuring duration should not be over 10 seconds within 15 minutes, and in these 15 minutes, no other current should flow through except within the measuring duration.
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Page 57: Appendix
P3250-1M Multimeter digital “BT”, True RMS Appendix A: Enclosure Standard Accessories: Test lead K-type Manual 9V battery Bolt driver Croco- Thermo- (6F22) dile clip couple Options: Bluetooth USB adapter to PC Appendix B: General Care and Cleaning Warning: To avoid electrical shock or damage to the multimeter, ensure that the insides of the casing stay dry at all times. -
Page 58: Appendix C: Changing The Fuse
P3250-1M Multimeter digital “BT”, True RMS Appendix C: Changing the fuse Warning: To avoid electrical shock or damage to the multimeter, ensure that the insides of the casing stay dry at all times. Change the fuse: To change the fuse, perform the following steps: 1. - Page 59 P3250-1M Multimeter digital “BT”, True RMS P3250-1M Multimeter digital “BT”, True RMS is the registered trademark of the Fruhmann GmbH in Austria. Fruhmann GmbH, NTL Manufacturer & Wholesaler Katharinenweg 3 7372 Karl Austria Tel: +43 2617 20278 Fax: +43 2617 20278 4 Web: www.ntl.at...
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