UNI-T UT377A - Multimeter Clas Ohlson - Free user manual and instructions
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| Product Type | Digital Multimeter |
| Brand | Clas Ohlson |
| Model | UNI-T UT377A |
| Dimensions (H x W x D) | 150 x 70 x 30 mm (approx.) |
| Weight | 200 g (approx.) |
| Power Supply | 1 x 9V battery (6F22) |
| Display | LCD, maximum reading 1999 |
| AC Voltage Range | 0-750V (True RMS) |
| DC Voltage Range | 0-1000V |
| AC Current Range | 0-10A (with overload protection) |
| DC Current Range | 0-10A |
| Resistance Range | 0-20 MΩ |
| Continuity Test | Audible buzzer < 30 Ω |
| Diode Test | Yes |
| Safety Category | CAT II 600V, CAT III 300V |
| Maintenance | Clean with dry cloth; replace battery when low |
| Spare Parts Available | Test leads, 9V battery |
| Manual Language | EN, FI, DE, NO, SV |
Frequently Asked Questions - UNI-T UT377A Clas Ohlson
How do I measure AC voltage with the UNI-T UT377A?
To measure AC voltage, turn the rotary switch to the ACV (V~) range. Connect the black test lead to COM and red to VΩmA. Place the probes across the source. Read the value on the display. The UT377A supports True RMS up to 750V.
What is the purpose of the continuity test?
Continuity test checks if a circuit is complete. Set the dial to the continuity symbol (sound wave). The buzzer will sound if resistance is less than approximately 30 Ω. Disconnect power before testing.
How do I replace the battery?
Turn off the meter and disconnect test leads. Remove the screw at the back and slide off the battery compartment cover. Replace the old 9V battery with a new one (6F22 type). Reattach the cover and tighten the screw.
What safety precautions should I take?
Always use the correct input jacks and range. Do not exceed maximum limits. Remove test leads before opening the case. Use only the provided test leads with the appropriate safety rating (CAT II 600V). Work on de-energized circuits when possible.
Can the UT377A measure temperature?
No, the UNI-T UT377A does not measure temperature. It is a standard multimeter for voltage, current, resistance, continuity, and diode testing.
What does 'OL' on the display mean?
'OL' stands for overload. It indicates that the measured value exceeds the selected range. Switch to a higher range to obtain a valid reading.
How do I test a fuse with this multimeter?
Set the dial to resistance (Ω) or continuity. Place the probes on each end of the fuse. If the resistance is very low (or buzzer sounds), the fuse is intact. If it shows OL (open), the fuse is blown.
What are the dimensions of the device?
The approximate dimensions are 150 mm x 70 mm x 30 mm (H x W x D). It is a compact handheld multimeter.
Is the UT377A auto-ranging?
No, the UNI-T UT377A is a manual-ranging multimeter. You must select the appropriate range for each measurement to avoid overload.
How do I clean the multimeter?
Disconnect test leads and remove the battery. Use a soft, dry cloth to wipe the exterior. Do not use solvents or abrasive cleaners. Ensure the device is completely dry before reassembling.
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