UT803 - Multimeter Uni-T - Free user manual and instructions
Find the device manual for free UT803 Uni-T in PDF.
Pick your language and provide your email: we'll send you a specifically translated version.
| Product type | Bench digital multimeter |
| Brand | Uni-T |
| Model | UT803 |
| Display | 5½-digit LCD with backlight |
| Dimensions | 300 x 220 x 90 mm |
| Weight | 1.5 kg |
| Power supply | AC 220V, 50/60 Hz |
| DC voltage range | 200 mV to 1000 V |
| AC voltage range | 200 mV to 750 V |
| DC current range | 200 µA to 20 A |
| AC current range | 200 µA to 20 A |
| Resistance range | 200 Ω to 200 MΩ |
| Capacitance range | 2 nF to 200 µF |
| Frequency range | 20 Hz to 200 kHz |
| Temperature measurement | ‑20 °C to 1000 °C (type K thermocouple) |
| Diode test | Yes, forward voltage |
| Continuity test | Yes, audible beep |
| Auto ranging | Yes |
| Data hold | Yes |
| RS232 interface | Yes, for PC connection |
| Safety rating | CAT II 1000V / CAT III 600V |
| Accessories included | Test leads, thermocouple, power cord, RS232 cable, software |
| Cleaning | Wipe with damp cloth, no solvents |
| Repairability | Replaceable fuses, calibration by qualified technician |
Frequently Asked Questions - UT803 Uni-T
How do I perform a continuity test with the UT803?
Turn the dial to the continuity symbol (diode). Connect the probes to the circuit. A beep indicates continuity below 50 Ω.
What is the maximum voltage I can measure with the UT803?
For DC voltage, up to 1000 V; for AC voltage up to 750 V. Observe safety rating CAT II 1000V / CAT III 600V.
How do I change the fuse in the UT803?
Disconnect the meter from any circuit and remove the power cord. Open the battery/fuse compartment on the back. Replace the blown fuse with the same type (e.g., 20A/250V or 1A/250V). Close the compartment.
Can I measure temperature with the UT803?
Yes, use the included type K thermocouple. Set the dial to °C or °F and insert the thermocouple into the temperature input terminals.
How do I connect the UT803 to a PC?
Use the provided RS232 cable to connect the meter to a serial port on your computer. Install the accompanying software and set the meter to RS232 mode via the menu.
What is the accuracy of the UT803?
DC voltage accuracy is ±(0.03% reading + 5 digits) on the best range. Refer to the manual for full specifications.
Why does my UT803 show 'OL'?
OL (Over Load) means the input exceeds the selected range. Switch to a higher range or select auto ranging if available.
How do I calibrate the UT803?
Calibration should be performed by a qualified technician using precision sources. The meter has internal potentiometers accessible after removing the case. Refer to the service manual.
Can the UT803 measure capacitance?
Yes, it measures capacitance from 2 nF to 200 µF. Connect the capacitor to the input terminals after discharging it.
What is the purpose of the 'DATA HOLD' button?
Press the DATA HOLD button to freeze the current reading on the display. Press again to release.
User questions about UT803 Uni-T
0 question about this device. Answer the ones you know or ask your own.
Ask a new question about this device
No questions yet. Be the first to ask one.
Download the instructions for your Multimeter in PDF format for free! Find your manual UT803 - Uni-T and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. UT803 by Uni-T.
USER MANUAL UT803 Uni-T
Manual assistant
Powered by Anthropic
Waiting for your message
Product information
Brand : Uni-T
Model : UT803
Category : Multimeter