UNI-T UT51 Operating Manual page 2

P/N:110401104336X
about 2.8V
Making Measurements
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as soon as possible
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On/Off Switch
1
Capacitance jack
2
Liquid Crystal Display
3
Temperature jack
4
Rotary switch
5
Transistor jack
6
Input jack
7
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Caution
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set to a higher
measurement range.
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Caution
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2A for UT51
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Caution
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set to a higher
measurement range.
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2A for UT51
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2A for UT51
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Caution
1) Please refer to DC Current Caution 1, 2, 3.
Measuring Resistance
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Caution
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Cut off the power to the circuit and discharge
all capacitors before measuring resistance.
which should be subtracted from subsequent
measured readings. For example, when
which should substract the 10 digits to obtain
a accurate reading.
Measuring Capacitance
Before measuring capacitance, remember it takes
time for zeroing when changing ranges. Floating
reading does not affect accuracy.
1) To avoid damage to the Meter or the equipment
under testing, disconnect circuit powers and
discharge capacitors before measuring
capacitance.
2) Connect capacitor to the capacitance jack.
3) It takes some time to get a stable reading
when measuring high capacitance.
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-6
4) Unit: 1pF=10
Measuring Frequency
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about 15 minutes, which only consume 7
Maintenance
General Service
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μF, 1nF = 10 -3 μF
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object
measuring
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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.
6. Replace the battery with a new 9V battery
(NEDA 1604 or 6F22 or 006P).
7. Rejoin the case bottom and case top, and install
the screws and rubber feet.
Replacing the Fuses
Caution
To avoid electrical shock or arc blast, or personal
injury or damage to the Meter, use specified
fuses ONLY in accordance with the following
procedure.
To replace the Meter's fuse:
1. Disconnect the connection between the testing
leads and the circuit under test, and remove
the testing leads away from the input terminals
of the Meter.
2. Turn the Meter power OFF.
3. Remove the rubber feet and screws from the
case bottom, and separate the case bottom
from the case top.
4. Remove the fuse by gently prying one end loose,
and then take out the fuse from its bracket.
5. Install ONLY replacement fuses with the
identical type and specification as follows and
make sure the fuse is fixed firmly in the bracket.
φ
UT51: 2A, 250V fast acting fuse, 5x20mm
(below 2A range)
φ
10A, 250V fast acting fuse, 5x20mm (at 10A
range)
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.
Using Holster
Three different ways to use holster:
1. Set holster parallel on the table, do not open
the tilt stand (see diagram 1).
2. Set holster in a small angle on the table, tilt
it up by the first part of tilt stand (see diagram 2)
3. Set holster in a large angle on the table, tilt it
up by all two parts of tilt stand (see diagram 3).
Figure1 Figure2
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.
~ END ~
* The manual is subject to changes without separate notice. *
Figure3