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Contents
A Your Meters Feature
B Specifications
C Making Measurements
D Maintenance
E Accessories
F Using Holster
G Using Strap
Introduction
One kind of UNI-T brand new UT50 series
Multimeters is a 3 1/2 digit with steady function
and highly reliable hand-held measuring instrument.
The Meter uses large scale of integrated circuit
with double integrated A/D converter as its core
and has full range overload protection. The Meter
can measure DC current, AC current, DC Voltage,
AC Voltage, Resistance, Capacitance, Diode,
Temperature, Frequency and Continuity, which is
an ideal tool for users.
Model UT51-55: OPERATING MANUAL
1
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Summary of Contents for UNI-T UT51-55
- Page 1 E Accessories F Using Holster G Using Strap Introduction One kind of UNI-T brand new UT50 series Multimeters is a 3 1/2 digit with steady function and highly reliable hand-held measuring instrument. The Meter uses large scale of integrated circuit with double integrated A/D converter as its core and has full range overload protection.
- Page 2 Model UT51-55: OPERATING MANUAL Safety Rules l The UNI-T UT50 series comply with IEC 61010: in pollution degree 2, overvoltage category (CAT I 1000V and CAT II 600V) and double insulation. Use the Meter only as specified in this manual, otherwise the protection provided by the Meter may be impaired.
- Page 3 Model UT51-55: OPERATING MANUAL l Make sure to use new fuses with proper rating in stead of bad fuses . l To avoid electric shock or damages, do not apply more than 1000V between the terminals and earth ground. "...
- Page 4 Model UT51-55: OPERATING MANUAL A. Your Meters Feature l 32 ranges. l Liquid Crystal Display, digits height is 27mm. l Overload display l. l Maximum display 1999 (3 1/2 digit). l Full range overload protection. l Auto-Power Off (For UT53, UT54 and UT55 ONLY).
- Page 5 Model UT51-55: OPERATING MANUAL B. Specifications Accuracy is specified for one year after calibration, at operating temperatures 23 +/- 5 , with relative humidity at < 75%.Accuracy specifications take the form of:+/- (a% readings +digits ) B-1Direct Current Voltage (DC Voltage)
- Page 6 Model UT51-55: OPERATING MANUAL B-3 Direct Current Current (DC Current) Accuracy Range Resolution UT51 UT 52 UT53 UT54 UT55 µ µ (2%+5) 0.01 µ µ (0.8%+1) µ (0.8%+1) µ 20mA µ 200mA (1.5%+1 ) (1.5%+1) (2%+5) 10mA (2%+5 ) Overload protection: For UT51: 2A, 250V fast acting fuse, φ5x20mm(below...
- Page 7 Model UT51-55: OPERATING MANUAL B-4 Alternating Current Current (AC Current) Accuracy Range Resolution UT51 UT 52 UT53 UT54 UT55 µ µ (1.8%+3) µ (1%+3) µ 20mA (1%+3) µ (1.8%+3) 200mA (1.8%+3) (3%+7) 10mA (3%+7 ) Overload protection: For UT51: 2A, 250V fast acting fuse, φ5x20mm(below 2A range) 10A, 250V fast acting fuse,φ5x20mm(at 10A range) .
- Page 8 Model UT51-55: OPERATING MANUAL B-5 Resistance Accuracy Range Resolution UT51 UT 52 UT53 UT54 UT55 Ω Ω (0.8% +3) Ω Ω Ω Ω (0.8% +1) Ω Ω 200K Ω Ω Ω Ω (1% +2) Ω Ω [5%(-10) +10] 100K 200M Ω...
- Page 9 Model UT51-55: OPERATING MANUAL Input sensitivity: 100mVrms. Overload protection: 250Vrms. B-8 Temperature Accuracy Range Resolution UT51,52,53 UT53 UT55 to 0 (5%+3) (1%+3) to 400 1000 1000 B-9 Diode Test and Continuity Beeper Range Measuring Condition Comment Display diode forward- Forward DC current abt...
- Page 10 Model UT51-55: OPERATING MANUAL C. Making Measurements “ ” “ ” On/Off Switch Capacitance jack Liquid Crystal Display Temperature jack Rotary switch Transistor jack Input jack...
- Page 11 Model UT51-55: OPERATING MANUAL “ ” “ ” “ ” Caution “ ” “ ” “ ” “ ” “ ” Caution “ ” “ ”...
- Page 12 Model UT51-55: OPERATING MANUAL “ ” “ ” “ ” Caution “ ” “ ” “ ” “ ” “ ” Caution 1) Please refer to DC Current Caution 1, 2, 3.
- Page 13 Model UT51-55: OPERATING MANUAL C-5 Measuring Resistance “ ” “ ” “ ” Caution “ ” “ ” C-6 Measuring Capacitance Before measuring capacitance, remember it takes time for zeroing when changing ranges. Floating reading does not effect accuracy. 1) To avoid damage of the Meter or the equipment...
- Page 14 Model UT51-55: OPERATING MANUAL C-7 Measuring Frequency “ ” “ ” “ ” “ ” “ ” “ ”...
- Page 15 Model UT51-55: OPERATING MANUAL D. Maintenance I. General Service ” “ ” “ ” “ ” “...
- Page 16 Model UT51-55: OPERATING MANUAL 2. Turn the Meter power OFF 3. Remove the holster from the Meter. 4. Remove rubber feet and screws from the case bottom, and separate the case bottom from the case top. 5. Remove the battery from the battery compartment.
- Page 17 Model UT51-55: OPERATING MANUAL UT52/53/54/55: 315mA, 250V fast acting fuse, φ 5x20mm 6. Rejoin the case bottom and the case top, and install the screw and rubber feet Replacement of fuses is seldom required. Burning of a fuse always results from the improper operation.
- Page 18 Model UT51-55: OPERATING MANUAL G. Using Strap 1. Put the front end of the strap through the round metal of the Meter, see part 1 of the below diagram. 2. Put the bottom end of the strap through the front part and tide it up, see part 2 of the below diagram.
- Page 19 Model UT51-55: OPERATING MANUAL...
- Page 20 Model UT51-55: OPERATING MANUAL Manufacturer: UNI-TREND TECHNOLOGY(DONG GUAN)LIMITED Address: Dong Fang Da Dao, Bei Shan Dong Fang Industrial Development District, Hu Men Town, Dong Guan City, Guang Dong Province, China Headquarters: Uni-Trend International Limited Address: Rm901, 9/F, Nanyang Plaza 57 Hung To Road...
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