UNI-T UT232 Operating Manual

Model UT232

OPERATING MANUAL

TABLE OF CONTENTS
TITLE PAGE

Model UT232: OPERATING MANUAL

1

Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
A.The Meter Front Structure
B.The Meter Back and Bottom Structure
Functional Buttons
Display Symbols
Measurement Operation
A. AC Voltage + Frequency Measurement
B. AC Current + AC Voltage Measurement
C. Active Power + Phase Angle Measurement
D. Apparent Power + Reactive Power Measurement
E. Power Factor + Phase Angle Measurement
F. Active Energy + Time Measurement
True RMS Measurement and Average Value Measurement
Specifications

3
3
4
4
6
7
7
8
9
12
14
14
16
18
25
27
29
31
32

2

32
33
34
34
34
35
35
36
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Model UT232: OPERATING MANUAL

TABLE OF CONTENTS
TITLE PAGE

A. General Specifications
B. Environmental Requirements
Accuracy Specifications
A. AC Voltage
B. Frequency
C. AC Current
D. Active Power
E. Apparent Power
F. Reactive Power
G. Power Factor
H. Phase Angle
I. Active Energy
Maintenance
A. General Service
B. Replacing the Battery

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Model UT232: OPERATING MANUAL

This Operating Manual covers information on safety
and cautions. Please read the relevant information
carefully and observe all the Warnings and Notes
strictly.

Warning

To avoid electric shock or personal injury, read the
ìSafety Informationî and ìRules for Safe Operationî
carefully before using the Meter.

Model UT232 is a three phase intelligent handheld

digital power clamp meter (hereafter referred to as ìthe
Meterî) which has both the features of digital current
meter and also power measurement meter.

The Meter can measure Voltage, Current, Active Power ,
Apparent Power, Reactive Power , Power Factor, Phase
Angle, Frequency, Active Energy and etc.

Open the package case and take out the Meter. Check
the following items carefully to see any missing or
damaged part:

Item

1
2
3
4
5
6
7
8
9
10
11
12
13

Description

English Operating Manual
Red Test Lead
Black Test Lead
Blue Test Lead
Yellow Test Lead
Red Alligator Clip
Black Alligator Clip
Blue Alligator Clip
Yellow Alligator Clip
USB Interface Cable
Software
Tool Box

1.5V Battery (LR6)

Qty

1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
1 piece
4 pieces

In the event you find any missing or damage, please
contact your dealer immediately.

Overview Unpacking Inspection

4

Model UT232: OPERATING MANUAL

Safety Information

This Meter complies with the standards IEC61010: in
pollution degree 2, overvoltage category (CAT. III 600V,
CAT IV 300V) and double insulation.

CAT. III: Distribution level, fixed installation, with smaller
transient overvoltages than CAT. IV
CAT.IV: Primary supply level, overhead lines, cable
systems etc.

Use the Meter only as specified in this operating manual,
otherwise the protection provided by the Meter may be
impaired.

In this manual, a Warning identifies conditions and
actions that pose hazards to the user, or may damage
the Meter or the equipment under test.

A Note identifies the information that user should pay
attention to.

International electrical symbols used on the Meter and

l

l

l
l

in this Operating Manual are explained on page 6.

Rules For Safe Operation

Warning

To avoid possible electric shock or personal injury,
and to avoid possible damage to the Meter or to the
equipment under test, adhere to the following rules:

Before using the Meter inspect the case. Do
not use the Meter if it is damaged or the case
(or part of the case) is removed. Look for cracks
or missing plastic. Pay attention to the insulation
around the connectors.
Inspect the test leads for damaged insulation
or exposed metal. Replace damaged test leads
with identical model number or electrical
specifications before using the Meter.
Do not apply more that the rated voltage, as
marked on the Meter.
When measurement has been completed,
disconnect the connection between the test
leads and the circuit under test, remove the

5

Model UT232: OPERATING MANUAL

l

l
l
l

l
l
l

testing leads away from the input terminals of
the Meter and turn the Meter power off.
Do not carry out the measurement when the
Meterís back case and / or battery door is opened
to avoid electric shock.
When the Meter working at an effective voltage
over 30V in AC, special care should be taken.
Use the proper terminals and function for your
measurements.
Do not use or store the Meter in an environment
of high temperature, humidity, explosive,
inflammable and strong magnetic field. The
performance of the Meter may deteriorate after
dampened.
Do not use the Meter if the surface of it is wet
or the userís hands are wet.
When using the test leads, keep your fingers
behind the finger guards.
Replace the battery as soon as the battery
indicator appears. With a low battery, the
Meter might produce false readings that can
lead to electric shock and personal injury.

l
l

l

l

l
l

l

When opening the battery door, must make sure
the Meter is power off.
When servicing the Meter, use only the same
model number or identical electrical
specifications replacement parts.
The internal circuit of the Meter shall not be
altered at will to avoid damage of the Meter and
any accident.
Soft cloth and mild detergent should be used
to clean the surface of the Meter when servicing.
No abrasive and solvent should be used to
prevent the surface of the Meter from corrosion,
damage and accident.
The Meter is suitable for indoor use.
Turn the Meter off when it is not in use and take
out the battery when not using for a long time.
Constantly check the battery as it may leak
when it has been using for some time, replace
the battery as soon as leaking appears.
A leaking battery will damage the Meter.

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Model UT232: OPERATING MANUAL

International Electrical Symbols

AC (Alternating Current)
Grounding
Double Insulated
Warning. Refer to the Operating Manual
Deficiency of Built-In Battery
Danger of High Voltage
Conforms to Standards of European Union

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Model UT232: OPERATING MANUAL

Figure 1

1

2

3
4
5
6
7

8
9

10

11
12
13

Transformer Jaw: designed to pick up the AC
and DC current flowing through the conductor.
It could transfer current to voltage. The tested
conductor must vertically go through the Jaw
center.
Hand Guards: to protect userís hand from
touching the dangerous area.
Power button
Max/ button
MENU button
LOAD button (recall data)
SELECT button (press to select alternate
function and sum of Watts measurement)
MIN/ button
V3 Input Terminal (Third phase measurement)
V2 Input Terminal
(Second phase measurement)
V1 Input Terminal (First phase measurement)
COM Input Terminal
CLEAR button (maximum and minimum)

Black Red Blue Yellow

The Meter Structure

A. The Meter Front Structure (see figure 1)

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Model UT232: OPERATING MANUAL

1 Infrared slot
2 USB Interface Cable

Figure 2

14
15
16
17
18
19
20

button (Sum)
SAVE button (data store button)
USB button
LIGHT button (auto display backlight button)
HOLD button
LCD Display
Testing Leads (Red, Black, Blue and Yellow)

B. The Meter Back and Bottom Structure

(see figure 2)

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Model UT232: OPERATING MANUAL

Functional Buttons

Below table indicated for information about the functional
button operations.

Button
POWER

HOLD

LIGHT

MENU

Operation Performed

Press and hold POWER for 1 second to
turn the Meter on.
Press POWER again to turn the Meter off.
Press HOLD to enter the Hold mode in
any mode,

appears and

the Meter
beeps.
Press HOLD again to exit the Hold
mode to return to measurement mode,
the Meter beeps and

disappears.
Press LIGHT to turn the display backlight
on.
The display backlight will be off
automatically after 30 seconds.
Press MENU to display the following
functions in sequence:
AC V oltage (main display) + Frequency

Button
MENU

MAX/

Operation Performed

(secondary display)
AC Current (main display) + AC V oltage
(secondary display)
Active power (main display) + Phase
angle (secondary display)
Apparent power (main display) +
Reactive power (secondary display)
Power factor (main display) + Phase
angle (secondary display)
Active Energy (main display) + Time
(secondary display)
Press to start recording of maximum
value, it valid at voltage, current, active
power and apparent power ranges only.
Press once at LOAD mode, MR icon
shown, the Meter displays the next
stored reading, the left secondary
display showing the index increase one.
Press once at mode, CAL icon shown,

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Model UT232: OPERATING MANUAL

Button
MAX/

USB

LOAD

Operation Performed

the Meter steps through sum of active
power (main display) + sum of reactive
power (secondary display) and sum of
power factor (main display) + sum of
apparent power.
Press USB once to turn the USB
interface on, USB appears and the
Meter beeps.
Press USB again to turn the USB
interface off, USB disappears and the
Meter beeps.
It is invalid at active energy mode
Press once to enter LOAD mode, MR
appears and the Meter beeps.
Press again to exit LOAD mode, MR
disappears and the Meter beeps.
Press and hold LOAD for 1 second to
display the stored data quickly.
At Active power (main display) + Phase
angle (secondary display) mode, press

once button to sum up the current

Button

Operation Performed

first phase of 3 phase measurement
result. Then carry out second phase
power measurement.
Press

again to sum up the second
phase power measurement result, then
carry out third phase power
measurement.
Press

again to sum up the third phase
power measurement result, then press
SELECT to enter the measurement of
sum of the watts mode, the display
shows the 3 phase sum of the watts
value.
Press once to store single reading,
MEM appears and the Meter beeps.
Press and hold for over 1 second to
continuous store reading, MEM blinks
and the Meter beeps. The index number
shown on the left secondary display
keep on increasing. Press SAVE again

SAVE

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Model UT232: OPERATING MANUAL

Button

At active power (main display) + phase
angle (secondary display) mode, press
SELECT button to step through first phase,
second phase, third phase and sum of
watts.
At other mode, press SELECT to step
through first phase, second phase and the
third phase.
Press to start recording of minimum value,
it valid at voltage, current, active power
and apparent power ranges only.
Press once at LOAD mode, MR icon
shown, the Meter displays the previous
stored reading, the left secondary display
showing the index decrease one.
Press once at mode, CAL icon shown,

SELECT

MIN /

Button

the Meter steps through sum of active
power (main display) + sum of reactive
power (secondary display) and sum of
power factor (main display) + sum of
apparent power.

CLEAR

Operation Performed

to exit. The maximum number of data store
is 99, when it achieves 99, the Meter shows
FUL. Press CLEAR to clear the stored
reading in order to store next reading.

Operation Performed

At active energy range, press to reset
time the zero, then restart the timing.
At all other ranges, press to clear stored
readings.

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Model UT232: OPERATING MANUAL

Display Symbols (see figure 3)

Figure 3

1
2
3
4
5
6
7
8
9

10

11

Meaning

Data Output is in progress

Indicator for DC measurement

First phase symbol

Second phase symbol

Third phase symbol

Unit for hour

Unit for minute

Watt: Sum of Watt

The battery is low.

Warning: To avoid false
readings, which could lead to
possible electric shock or
personal injury, replace the
battery as soon as the battery
indicator appears.

Unit for second
Symbol of Unit.
Hz: Hertz.The unit of frequency.
PG: The unit of phase angle
KVAr. The unit of reactive power

Symbol
USB
DC

1
2
3

h
mm

W

s

Hz,
PG,
KVAr

Number

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Model UT232: OPERATING MANUAL

Number

12
13
14
15
16
17

18
19
20
21

22

23
24
25
26

Meaning

Minimum reading
Analogue Bar Graph
Overloading
Ruler
Maximum reading
Indicator for clear the stored
reading
Ruler negative symbol
High voltage symbol
Indicates negative reading
Indicator for AC voltage or
current
Indicator for recall the stored
reading
Frequency symbol
Indicator for data store
Indicator for data stored is full
Data hold is active

Symbol
MIN

MAX
CLR

AC

MR

FREQ
MEM
FUL

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Model UT232: OPERATING MANUAL

Figure 4

Black

Red

Blue

Yellow

Measurement Operation

Preparation

Press and hold POWER for one second to turn the
Meter on. The default range is the last measurement
range when you turned off the Meter.
Replace the battery as soon as the battery indicator
ì î appears on the display.

A. AC Voltage (main display) + Frequency
(secondary display) Measurement (see figure 4)

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Model UT232: OPERATING MANUAL

The AC Voltage ranges are:15V , 100V, 300V and 600V
The frequency range is:20Hz~500Hz
To measure AC voltage + frequency, connect the Meter

as follows:

1.

2.

3.

4.

Insert the red test lead into the V1 terminal, blue
test lead into the V2 terminal, yellow test lead to
V3 input terminal and black test lead to the COM
input terminal.
Press the MENU to select Voltage (main display)
+ Frequency (secondary display) range.
Connect the red test leads (V1 input terminal), blue
test leads (V2 input terminal) and yellow test leads
(V3 input terminal) to the corresponding three
phases loaded live wire. Black test lead (COM
input terminal) to the corresponding three phases
loaded neutral wire.
Press SELECT to select phase location, the display
shows the corresponding phase symbol. V1 means
the first phase 1, V2 means the first phase 2,
V3 means the first phase 3.

5.

6.

7.

8.

The display shows the corresponding True RMS
voltage value and frequency value of each phase.
Press MAX/ , the LCD displays MAX, it starts
recording the maximum AC voltage T rue RMS value.
Press MAX/ again to show the current AC voltage
True RMS value.
Press MIN/ the LCD displays MAX, it starts
recording the minimum AC voltage T rue RMS value.
Press MAX/ again to show the current AC voltage
True RMS value.
The display shows OL when the input voltage is
higher than 600V rms.

Note

When the measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test and remove testing leads
from the input terminals.

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Model UT232: OPERATING MANUAL

B. AC Current (main display) + AC Voltage
(secondary display) Measurement (see figure 5)

Figure 5

The AC current ranges are: 40A, 100A, 400A and 1000A
The AC Voltage ranges are: 15V , 100V, 300V and 600V
T o measure AC current + AC voltage, connect the Meter

as follows:

1.

2.

3.

4.

5.

Press the MENU to select AC Current (main display)
+ AC Voltage (secondary display) range.

Press the lever to open the transformer jaw.
Center the conductor within the transformer jaw,
then release the Meter slowly until the trasnformer
jaw is completely closed, Make sure the conductor
to be tested is placed at the center of the transformer
jaw, otherwise it will casue deviation. The Meter
can only measure one conductor at a time, to
meausre more than one condutor at a time will
cause deviation.
The double display shows the AC current True
RMS value and AC voltage True RMS value.

Press MAX/ , the LCD displays MAX, it starts
recording the maximum AC current T rue RMS value.
Press MAX/ again to show the present AC

6.

7.

True RMS value.
Press MIN/ , the LCD displays MAX, it starts
recording the minimum AC current T rue RMS value.
Press MAX/ , again to show the present AC current
True RMS value.
The display shows OL when the current of the
tested conductor is higher than 1000A rms.

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Model UT232: OPERATING MANUAL

Note

When the measurement has been completed,
disconnect the connection between the conductor
under test and the jaw, and remove the conductor
away from the transformer jaw of the Meter.

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Model UT232: OPERATING MANUAL

C. Active Power (main display) + Phase Angle
(secondary display) Measurement

The active power ranges are:
40A, 100A, 400A and 1000A

The phase angle ranges are: 0∞ ~360∞

Warning

To avoid damages to the Meter or harms to you, do
you measure higher than AC voltage 600 v.r.s. and
AC current 1000A v.r.s.

To measure active power + phase angle, connect the
Meter as follows:

1.2.Press the MENU to select Active power (main
display) + Phase angle (secondary display) range.
Press the lever to open the transformer jaw, and
clamp them to the corrresponding phase of tested
conductor. If user needs to mesaure any phase of
the 3 phase, then clamp them to that phaseís
conductor.

3. Connecting method (see figure 6, 7, 8):

Figure 6

Model UT232: OPERATING MANUAL

19

Black

Red

Blue

Yellow

Insert red test leads to V1 input terminal.
Insert blue test leads to V2 input terminal
Insert yellow test leads to V3 input terminal and
connecting it to every live wire of the 3 phase.
Insert black test leads to COM input terminal and
connect it to the neutrual wire of the 3 phase.
You must specify that this connection is used only
when the main transformer have STAR connection.

Figure 7

Model UT232: OPERATING MANUAL

20

Insert red test leads to V1 input terminal.
Insert blue test leads to V2 input terminal
Insert yellow test leads to V3 input terminal and
connect it to every live wire of the 3 phase.

Red

Blue

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Model UT232: OPERATING MANUAL

Figure 8

Insert red test lead to V1, V2 or V3 input terminal
corresponding to one of 1, 2 or 3 phase
Insert black test leads to COM input terminal.
Connecting the two test leads to live and neutual
wires.

Black

Red

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Model UT232: OPERATING MANUAL

Figure 9

Figure 10

Figure 11

Figure 12

4. When measuring 3 phases 4 wires or 3 phases

3wires:(see figure 9, 10, 11, 12, 13, 14, 15)

Press SELECT to choose first phase 1, see
figure 9. The double displays show the acitve
power kW value and also the PG value of 1.

If necessary, press to get the sum of watts as
figure 10.

After sum up the current power measurement value
of the first phase, then press SELECT to choose the
second phase 2, as figure 11

The double display shows the value of acitve power
kW and PG of 2.
If ncessary, press to get the sum of watts as figure

12.

Model UT232: OPERATING MANUAL

23

Figure 14

Figure 15

Figure 13

After sum up the current power meaursuremnt value
of the second phase, then press SELECT again to
choose the third phase 3, as figure 13.

The double display shows the value of acitve power
KW and PG of 3.
If ncessary, press to get the sum of watts as figure

14.

After sum up the current power measurement value
of the third phase, finally press SELECT again to
display the 3 phase sum of acitve power value and
reactive power value.
Press MAX/ or MIN/ as figure 15 to step through
in sequence three phase sum of active power+three
phase sum of reacitve power, and three phase sum
of power factor + 3 phase sum of apparent power.

Model UT232: OPERATING MANUAL

24

active power, OL will be displayed when it is over
than that.
Press MAX/ , the display shows MAX, it starts
recording the maximum active power value. Press
again to display the current active power value.
Press MIN/ , the display shows MIN, it starts
recording the minimum active power value. Press
again to display the current active power value.

6.

7.

The maximum power is 600kW of single phase, OL
will be displayed when it is over than that. The
maximum range is 1800kW of three phase sum of

5.

When there is no input or single phase, the Meter
displays OL. button is not valid.
It can only sum up the current measurement value.
The maximum and minimum value cannot be
summed up.
Only at this range can carry out sum of watts
measurement, other ranges cannot carry out this
measurement.
When testing has been completed, disconnect the
connection between the testing leads and the circuit
under test and remove testing leads from the input
terminals.

Note

Figure 17

Figure 18

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Model UT232: OPERATING MANUAL

D. Apparent Power (main display) + Reactive Power
(secondary display) Measurement

To avoid damages to the Meter or harms to you, do
you measure higher than AC voltage 600V rms and
AC current 1000A rms.

Warning

To test for Apparent power (main display) + Reactive
power (secondary display), connect the Meter as follows:

1.

2.

3.

Press the MENU to select Apparent power (main
display) + Reactive power (secondary display)
range.
Press the lever to open the transformer jaw, and
clamp them to the corrresponding phase of tested
conductor. If user needs to mesaure any phase of
the 3 phase, then clamp them to that phaseís
conductor.
The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
6, 7 a nd 8

4. When measuring 3 phase 4 wires:
(see figure 17, 18, 19)

Press SELECT to choose the first phase 1,
see figure 17.

The double display shows the first phase value
of apparent power kVA and reactive power Kvar.
Then press SELECT again to choose the second
phase 2, see figure 18.

Figure 19

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Model UT232: OPERATING MANUAL

The double display shows the second phase value
of apparent power kVA and reactive power Kvar.
Press SELECT again to choose the third phase 3,
see figure 19.

The double display shows the third phase value of
apparent power kVA and reactive power Kvar.

When measuring 3 phase 3 wires:
The first phase and secodn phase operating
method is same as three phase 4 wires.
Jump over the third phase measurement.
The maximum measuring range is 600kW when
measuring single phase apparent power kVA and
reactive power Kvar, OL wil be displayed when it is
over than that.
Press MAX/ , the display shows MAX, it starts
recording the maximum apparent power value.
Press again to display the current apparent power
value.
Press MIN/ , the display shows MIN, it starts
recording the minimum apparent power value.
Press again to display the current apparent power
value.

5.

6.

7.

8.

Note

When testing has been completed, disconnect the
connection between the testing leads and the circuit
under test and remove testing leads from the input
terminals.

Figure 20

Figure 21

Model UT232: OPERATING MANUAL

27

E. Power Factor (main display) + Phase Angle
(secondary display) Measurement

To avoid damages to the Meter or harms to you, do
you measure higher than AC voltage 600V rms and
AC current 1000A rms.

Warning

To test for Power factor (main display) + Phase angle
(secondary display), connect the Meter as follows:

Press the MENU to select Power factor (main
display) + Phase angle (secondary display) range.
Press the lever to open the transformer jaw, and
clamp them to the corrresponding phase of tested
conductor. If user needs to mesaure any phase of
the 3 phase, then clamp them to that phaseís
conductor.
The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
6, 7 and 8
When measuring 3 phase 4 wires: (see figure 20,
21, 22)

1.

2.

3.

4.

Press SELECT to choose the first phase 1,
see figure 20.

The double display shows the first phase value of
power factor PF and phase angle PG.
Then press SELECT again to choose the second
phase 2, see figure 21.

Figure 22

Model UT232: OPERATING MANUAL

28

The double display shows the second phase value
of power factor PF and phase angle PG.
Press SELECT again to choose the third phase 3,
see figure 22.

The double display shows the third phase value of
power factor PF and phase angle PG.

5. When measuring 3 phase 3 wires:
The first phase and second phase operating

method is same as three phase 4 wires.
Jump over the third phase measurement.

6. MAX/ and MIN/ are not valid when measuring

power factor.

When testing has been completed, disconnect the
connection between the testing leads and the circuit
under test and remove testing leads from the input
terminals.

Note

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Model UT232: OPERATING MANUAL

Figure 23

F. Active Energy (main display) + Time (secondary
display) Measurement

Warning

To avoid damages to the Meter or harms to you, do
you measure higher than AC voltage 600V rms and
AC current 1000A rms.

To test for Active Energy (main display) + Time
(secondary display), connect the Meter as follows:

1.

2.

3.

4.

Press the MENU to select Power factor (main
display) + Phase angle (secondary display) range.
Press the lever to open the transformer jaw, and
clamp them to the corrresponding phase of tested
conductor. If user needs to mesaure any phase of
the 3 phase, then clamp them to that phaseís
conductor.
The connecting method of 3 phase 4 wires, 3 phases
3 wires or single phase 2 wires, see figure 6, 7 and
8
Press SELECT to choose one of the three phases
( 1, 2, 3), see figure 23.

The double display shows the value of tested objectís
active engergy kWh value and the measuring time
of the corresponding phase.
The measuring reading gets increasing along with
the time increases. Press HOLD to read a particular
time kWh value. Then the reading and time are
locked, but still continuous accumulate measuring
time.
After read the data, press HOLD again to continous
measurement. kWh value continous accumulate
and the measuring time jumps to the present
measuring time.
When the measuring time is over 24 hours or the
Meter is switched to other measuring ranges, active
energy measuring will stop.

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Model UT232: OPERATING MANUAL

The maximum readinng of acitve energy is
9999kWh. OL will be displayed when the reading
is over than that.

5. MAX/ and MIN/ are not valid when measuring
active energy.

6. Press CLEAR to reset the time.

Note

When there is no input signal, it cannot carry out
active energy measurement.
When there is input signal, the maximum waiting
time is around 10s before timing.
When testing has been completed, disconnect the
connection between the testing leads and the circuit
under test and remove testing leads from the input
terminals.

Model UT232: OPERATING MANUAL

31

True RMS Measurement and A verage Value
Measurement

The True RMS measurement method can measure
accurately the effective value of non-sine wave input
signal.

Average value measurement method can measure the
mean value of one sine wave input signal, and then
displays it as RMS value

When the input waveform has distortion, measuring
tolerance will be included. The total tolerance depends
on the total distortion. Below table 1 shows the waveform
coefficient and the relationship and the requested
changing factor of sine wave, square wave, pulse
rectangle wave, sawtooth triangle wave, RMS value
and average value.

Input Wave PK-PK 0-PK RMS AVG

Sine

PK

0

PK-PK

sine commute
(whole wave)

PK

0

PK-PK

sine commute
(half wave)

PK

0

PK-PK

square wave

PK
0

PK-PK

commuted square wave

PK
0

PK-PK

pulse rectangle

X

0

PK-PK

Y

D=X/Y

sawtooth triangle

PK
0

PK-PK

2.828

1.414

2.828

1.800

1.800

0.9/D

3.600

1.414

1.414

2.828

0.900

1.800

0.9/ D

1.800

1.000

1.000

1.414

0.900

1.272

0.9D/2

1.038

0.900

0.900

0.900

0.900

0.900

0.9/D

0.900

Model UT232: OPERATING MANUAL

32

Specifications

A. General Specifications

Maximum Voltage between any Terminals and
grounding: Refer to different range input protection
voltage.
Display: Multi LCD displays, Maximum display 9999.
Ranges: Auto
Overloading: Display OL.
Battery Deficiency: Display .
Data Holding: Display
Data Logging: Maximum 99, Single or Continuous
records
Data Recall
Maximum and Minimum value display: Voltage,
Current, Active Power and Apparent Power ranges
Display Backlight: White colour
Computer connection: USB
Calibration Feature
Sleep Mode: To preserve battery life, the Meter
automatically turns off if you do not turn press any
button for around 15 minutes., except at active factor
range.

Sampling: 3 times per second.
Max. Jaw Size: 55mm diameter.
Analogue Bar Graph
Power: 4 x 1.5V battery (LR6)
Dimensions: 303mm x 112mm x 39mm
Weight: Approximate 601g

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Model UT232: OPERATING MANUAL

B. Environmental Requirements

The Meter is suitable for indoor use.
Altitude: Operating: 2000m
Storage: 10000m
Temperature and humidity:

Operating:

0

~ 30 ( 85%R.H)

30

~ 40 ( 75%R.H)

40

~ 50 ( 45%R.H)

Storage:

-10

~ +60 ( 85%R.H)
Safety/ Compliances: IEC 61010 CAT.III 600V,
CAT.IV 300V overvoltage and double insulation
standard, pollution degree 2.
Certification:

34

Model UT232: OPERATING MANUAL

Accurate Specifications

Accuracy: (a% reading + b digits), guarantee for 1 year.
Operating temperature: 23

5

Operating humidity: 45~75%R.H

A. AC Voltage (True RMS)

Range
15V
100V
300V
600V

Resolution

0.1V

Accuracy

(1.2%+5)

Allowable Maximum overload protection voltage

600 RMS

Input Impedance

10M

B. Frequency

Range
20Hz~500Hz

Resolution
1Hz

Accuracy

(0.5%+5)

Model UT232: OPERATING MANUAL

35

D. Active Power ( W=V x A x COS )

Current / Voltage

Current
Range

40A
100A
400A
1000A

15V

0.60kW

1.50kW

6.00kW

15.00kW

100V

4.00kW

10.00kW

40.00kW

100.0kW

300V

12.00kW

30.00kW

120.0kW

300.0kW

600V

24.00kW

60.00kW

240.0kW

600.0kW

Voltages Range

Accuracy
Resolution

(3%+5)

<1000kW: 0.01kW

100kW: 0.1kW

Remarks:

Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS

C. AC Current (True RMS)

Range
40A
100A
400A
1000A

Resolution

0.1A

1A

Accuracy

(2%+5)

Allowable Maximum overload protection current

1000A RMS

Model UT232: OPERATING MANUAL

36

E. Apparent Power (VA = V x A)

Current / Voltage

Current
Range

40A
100A
400A
1000A

15V

0.60kVA

1.50kVA

6.00kVA

15.00kVA

100V

4.00kVA

10.00kVA

40.00kVA

100.0kVA

300V

12.00kVA

30.00kVA

120.0kVA

300.0kVA

600V

24.00kVA

60.00kVA

240.0kVA

600.0kVA

Voltages Range

Accuracy
Resolution

(3%+5)

<1000kVA: 0.01kVA

100kVA: 0.1kVA

Remarks:

Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS

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Model UT232: OPERATING MANUAL

F. Reactive Power (Var = V x A x SIN )

Current / Voltage

Current
Range

40A
100A
400A
1000A

15V

0.60kVar

1.50kVar

6.00kVar

15.00kVar

100V

4.00kVar

10.00kVar

40.00kVar

100.0kVar

300V

12.00kVar

30.00kVar

120.0kVar

300.0kVar

600V

24.00kVar

60.00kVar

240.0kVar

600.0kVar

Voltages Range

Accuracy
Resolution

15V/1000A Range: (4%+10) Other Ranges: (4%+5)
<1000kVar: 0.01kVar

100kVar: 0.1kVar

Remarks:

Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS

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Model UT232: OPERATING MANUAL

G. Power Factor (PF = W / VA)

Range

0.3~1
(capacitive or inductive)

0.3~1
(capacitive or inductive)

Accuracy

0.022

Resolution

0.001

Measuring Condition
The minimum measuring current 10A
The minimum measuring voltage 45V
Measuring current less than 10A OR
Measuring voltage less than 45V

For reference only

H. Phase Angle (PG=acos (PF))

Range
0∞ ~360∞

0∞ ~360∞

Accuracy

1∞

Resolution
1∞

Measuring Condition
The minimum measuring current 10A
The minimum measuring voltage 45V
Measuring current less than 10A OR
Measuring voltage less than 45V

For reference only

Remarks:

Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS

Model UT232: OPERATING MANUAL

39

I. Active Energy (kWh)

Range
1~9999kWh

Accuracy

(3%+2)

Resolution

0.001kWh

Remarks:

Allowable maximum overload protection voltage:

600V RMS

Allowable maximum overload protection current:

1000A RMS

MAINTENANCE

This section provides basic maintenance information
including battery replacement instruction.

Do not attempt to repair or service your Meter unless
you are qualified to do so and have the relevant
calibration, performance test, and service
information.

To avoid electrical shock or damage to the Meter,
do not get water inside the case.

Warning

A. General Service

Periodically wipe the case with a damp cloth and mild
detergent. Do not use abrasives or solvents.
To clean the terminals with cotton bar with detergent,
as dirt or moisture in the terminals can affect readings.
Turn the Meter power off when it is not in use.
Take out the battery when it is not using for a long
time.
Do not use or store the Meter in a place of humidity,

Figure 24

Model UT232: OPERATING MANUAL

40

high temperature, explosive, inflammable and strong
magnetic field.

B. Replacing the Battery (see figure 24)

To avoid false readings, which could lead to possible
electric shock or personal injury, replace the battery
as soon as the battery indicator ì î appears.

Make sure the transformer jaw and the tests leads
are disconected from the circuit being tested before
opening the case bottom.

Warning

To replace the battery:.

1.

2.

3.

4.

5.

Press POWER to turn the Meter off and remove all
the connections from the input terminals
Turn the Meterís front case down.
Remove the screw from the battery door, and
separate the battery door from the case bottom.
Take out the old battery and replace with 4 x 1.5V
battery (LR6).
Rejoin the case bottom and the battery compartment,
and reinstall the screw.

Model UT232: OPERATING MANUAL

41

This operating manual is subject to change without notice.

*END*

Model UT232: OPERATING MANUAL

42

Copyright 2007 Uni-Trend Group Limited.

All rights reserved.
Manufacturer:

Uni-Trend Technology (Dongguan) Limited
Dong Fang Da Dao
Bei Shan Dong Fang Industrial Development District
Hu Men Town, Dongguan City
Guang Dong Province
China
Postal Code: 523 925

Headquarters:
Uni-Trend Group Limited
Rm901, 9/F, Nanyang Plaza
57 Hung To Road
Kwun Tong
Kowloon, Hong Kong
Tel: [phone]
Fax: [phone]
Email: [e-mail]
http://www.uni-trend.com