Model UT233
OPERATING MANUAL
Model UT233: OPERATING MANUAL
TABLE OF CONTENTS
TITLE
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. Active power + AC Voltage + AC Current Measurement
B. Apparent Power + AC Voltage + AC Current Measurement
C. Reactive Power + AC Voltage + AC Current Measurement
D. Power Factor cos + AC Voltage + AC Current Measurement
E. Phase Angle + AC Voltage + AC Current Measurement
F. Frequency Hz + AC Voltage + AC Current Measurement
G. Active Energy + Active Power + Time Measurement
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Model UT233: OPERATING MANUAL
TABLE OF CONTENTS
TITLE
H. Phase Sequence
Specifications
A. General Specifications
B. Environmental Requirements
Accuracy Specifications
A. AC Voltage (True RMS)
B. Frequency
C. AC Current (True RMS)
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 UT233: OPERATING MANUAL
Overview
Unpacking Inspection
This Operating Manual covers information on safety
and cautions. Please read the relevant information
carefully and observe all the Warnings and Notes
strictly.
Open the package case and take out the Meter. Check
the following items carefully to see any missing or
damaged part:
Warning
To avoid electric shock or personal injury, read the
ìSafety Informationî and ìRules for Safe Operationî
carefully before using the Meter.
Model UT233 is a digital power clamp meter (hereafter
referred to as ìthe Meterî) is a handheld intelligent
power meter 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 Phase Sequence.
Item
1
2
3
4
5
6
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Description
English Operating Manual
Test Lead (red, black, blue
and yellow colour
Alligator Clip (red, black, blue
and yellow colour)
USB Interface Cable
Software
Tool Box
1.5V Battery (LR6)
Qty
1 piece
1 piece each
colour
1 piece each
colour
1piece
1 piece
1 piece
4 pieces
In the event you find any missing or damage, please
contact your dealer immediately.
3
Model UT233: OPERATING MANUAL
Safety Information
in this Operating Manual are explained on page 6.
This Meter complies with the standards IEC61010: in
pollution degree 2, overvoltage category (CAT. III 600V,
CAT IV 300V) and double insulation.
Rules For Safe Operation
CAT. III: Distribution level, fixed installation, with smaller
transient overvoltages than CAT. IV.
CAT IV: Primary supply level, overhead lines, cable
systems.
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:
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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
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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
Model UT233: OPERATING MANUAL
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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.
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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.
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 UT233: OPERATING MANUAL
1
The Meter Structure
A. The Meter Front Structure (see figure 1)
2
Black
Red
Blue
Yellow
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)
Figure 1
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Model UT233: OPERATING MANUAL
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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
figure2)
Figure 2
1
2
8
Infrared slot
USB Interface Cable
Model UT233: 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:
Button
MENU
Operation Performed
Active power (main display) + AC Voltage
(left secondary display) + AC Current
(right secondary display)
Apparent Power (main display) + AC
Voltage (left secondary display) + AC
Current (right secondary display)
Reactive Power (main display) + AC
Voltage (left secondary display) + AC
Current (right secondary display)
Power Factor (main display) + AC
Voltage (left secondary display) + AC
Current (right secondary display)
Phase Angle (main display) + AC
Voltage (left secondary display) + AC
Current (right secondary display).
Frequency (main display) + AC
Voltage (left secondary display) + AC
Current (right secondary display).
Active Energy (main display) + Active
Power (left secondary display) + Time
(right secondary display)
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Model UT233: OPERATING MANUAL
Button
MENU
MAX/
LOAD
SELECT
10
Operation Performed
Phase sequence
Press to start recording of maximum value,
it valid at voltage, current, active power,
apparent power and reactive power
ranges only.
Press once at LOAD mode, MR icon
shown, the Meter displays the next
stored reading
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) + AC Voltage
(left secondary display) + AC Current (right
secondary display) mode, press SELECT
button to step through first phase, second
phase, third phase and sum of watts.
Button
SELECT
Operation Performed
At other mode except phase sequence,
press SELECT to step through first
phase, second phase and the third
phase.
SAVE
Press once to store single reading,
Press and hold for over 1 second to
continuous store reading. Press SAVE
again to exit. The maximum number
of data store is 99, when it achieves
99, the Meter shows FULL. Press
CLEAR to clear the stored reading in
order to store next reading.
CLEAR
At active energy range, press to reset
time the zero, then restart the timing.
At all other ranges, press to clear stored
readings.
Press to start recording of minimum
value, it valid at voltage, current, active
power, apparent power and reactive
power ranges only.
MIN /
Model UT233: OPERATING MANUAL
Button
MIN /
Operation Performed
Press once at LOAD mode, MR icon
shown, the Meter displays the previous
stored reading.
At Active power (main display) + Phase
angle (secondary display) mode, press
once button to sum up the current 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 (Power
factor + Active power + Reactive power).
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Model UT233: OPERATING MANUAL
Display Symbols (see figure 3)
Number
1
2
3
Symbol
CAL
FUL
CLR
4
5
6
7
USB
8
9
10
11
12
W
3
1 2 3 4 5 6 7
26
25
24
23
22
21
20
8
9
10
11
12
13
19 18 17 16 15 14
Figure 3
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RST
2
1
Meaning
Calibration symbol
Indicator for data stored is full
Indicator for clear the stored
reading
Data Output is in progress
Data hold is active
Phase sequence
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.
Watt: Sum of Watt
Third phase symbol
Primary reading unit symbol
Second phase symbol
First phase symbol
Model UT233: OPERATING MANUAL
Number Symbol Meaning
Right secondary display unit
13
symbol
S
Unit for second
14
mm
Unit for minute
15
h
Unit for hour
16
KW
Left secondary display unit symbol
17
MIN
Minimum reading
18
MAX
Maximum reading
19
Auto
Auto ranging indicator
20
Cos indicator
Cosφ
21
Indicates negative reading
22
Indicator for AC voltage or current
23
Indicator for data store
MEN
24
Indicator for recall the stored
MR
25
reading
High voltage symbol
26
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Model UT233: OPERATING MANUAL
Measurement Operation
Press and hold ON/OFF button 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
appears on the display.
A. Active power (main display) + AC Voltage (left
secondary display) + AC Current (right secondary
display) Measurement (see figure 4)
The active power ranges are:
40A, 100A, 400A and 1000A
The AC Voltage ranges are:
15V, 100V, 300V and 600V
The AC Current ranges are:
40A, 100Am 400A and 1000A
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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 + AC voltage + AC current,
connect the Meter as follows:
1. Press the MENU to select Active power (main
display) + AC Voltage (left secondary display) + AC
Current (right secondary display) range.
2. 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 4, 5, 6).
Model UT233: OPERATING MANUAL
Red
Blue
Insert red test leads to V1 input terminal.
Insert blue test leads to V2 input terminal
Insert yellow test leads to V3 input terminal
Connect red blue and yellow test leads 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
when the main transformer have STAR connection.
Yellow
Black
Figure 4
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Model UT233: OPERATING MANUAL
Insert red test leads to V1 input terminal.
Insert blue test leads to V2 input terminal
Insert black test leads to V3 input terminal and
connecting it to every live wire of the 3 phase.
Red
Blue
Yellow
Figure 5
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Model UT233: OPERATING MANUAL
4. When measuring 3 phases 4 wires or 3 phases 3
wires:(see figure 7, 8, 9, 10, 11, 12, 13).
Press SELECT to choose first phase 1, see
figure 7. The triple displays show the acitve
power kW value, the voltage value and the current
value of 1.
Red
Black
Figure 7
Figure 6
Insert red test lead to V1, V2 or V3 input terminal
corresponding to one of, 1, 2 or 3phase
Insert black test leads to COM input terminal.
Connecting the two test leads to live and neutual
wires.
If necessary, press
figure 8.
to get the sum of watts as
Figure 8
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Model UT233: OPERATING MANUAL
After sum up the current power measurement value
of the first phase, then press SELECT to choose
the second phase 2, as figure 9.
Figure 9
The triple displays shows the value of acitve power
kW, AC voltage V and AC current A of 2.
If ncessary, press to get the sum of watts as figure
10.
Figure 10
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After sum up the current power meaursuremnt value
of the second phase, then press SELECT again to
choose the third phase 3, as figure 11.
Figure 11
The triple displays shows the value of acitve power
KW, AC voltage V and AC current A of 3.
If ncessary, press to get the sum of watts as figure
12.
Figure 12
Model UT233: OPERATING MANUAL
After sum up the current power measurement value
of the third phase, finally press SELECT again to
display the 3 phases sum of waltt value (sum of
power factor + sum of active power + sum of reactive
power).
Figure 13
5. The maximum power is 600kW of single phase active
power, OL will be displayed when it is over than that.
The maximum range is 1800kW of three phase sum
of active power and reactive power, OL will be
displayed when it is over than that.
6. Press MAX/ , the display shows MAX, it starts
recording the maximum active power value, voltage
value and current value. Press again to display the
current active power value, voltage value and current
value.
7. Press MIN/ , the display shows MIN, it starts
recording the minimum active power value, voltage
value and current value. Press again to display the
current active power value, voltage value and current
value.
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Model UT233: OPERATING MANUAL
Note
When there is no input or single phase, the Meter
displays OL.
button is not valid.
It can only sum up and save the current
measurement value. The maximum and minimum
value cannot sum up and save.
Only at this range can carry out sum of watts
measurement, other ranges cannot carry out this
measurement.
USB interface connection is invalid when carrying
out sum of watt 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.
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Model UT233: OPERATING MANUAL
B. Apparent Power (main display) + AC Voltage
(left secondary display) + AC Current (right
secondary display) Measurement
Warning
4. When measuring 3 phase 4 wires: (see figure 15,
16, 17).
Press SELECT to choose the first phase 1, see
figure 15.
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 Apparent Power (main display) + AC Voltage
(left secondary display) + AC Current (right secondary
display), connect the Meter as follows:
1. Press the MENU to select Apparent Power (main
display) + AC Voltage (left secondary display) + AC
Current (right secondary display) range.
2. 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. The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
4, 5 and 6.
Figure 15
The triple displays shows the first phase value
of apparent power kVA, AC voltage V and AC
current A..
Then press SELECT again to choose the second
phase 2, see figure 16.
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Model UT233: OPERATING MANUAL
The triple displays shows the third phase value
of apparent power kVA, AC voltage V and AC
current A.
5. When measuring 3 phase 3 wires:
Figure 16
The triple displays shows the second phase value
of apparent power kVA, AC voltage V and AC current
A.
Press SELECT again to choose the third phase 3,
see figure 17.
Figure 17
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The first phase and second phase operating
method is same as three phase 4 wires.
Jump over the third phase measurement.
6. The maximum measuring range is 600kW when
measuring single phase apparent power kVA, OL wil
be displayed when it is over than that.
7. Press MAX/ the display shows MAX, it starts
recording the maximum apparent power value, AC
voltage value and AC current value. Press again to
display the current apparent power value, AC voltage
value and AC current value.
8. Press MIN/ the display shows MIN, it starts recording
the minimum apparent power value, AC voltage value
and AC current value. Press again to display the
current apparent power value, AC voltage value and
AC current value.
Model UT233: OPERATING MANUAL
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.
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Model UT233: OPERATING MANUAL
C. Reactive Power (main display) + AC Voltage (left
secondary display) + AC Current (right 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 Reactive Power (main display) + AC Voltage
(left secondary display) + AC Current (right secondary
display), connect the Meter as follows:
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. The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
4, 5 and 6.
4. When measuring 3 phase 4 wires: (see figure 17,
18, 19)
Press SELECT to choose the first phase 1,
see figure 18.
1. Press the MENU to select Reactive Power (main
display) + AC Voltage (left secondary display) + AC
Current (right secondary display) range.
2. Press the lever to open the transformer jaw, and
Figure 18
The triple displays shows the first phase value
of reactive power Kvar, AC voltage V and AC
current A.
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Model UT233: OPERATING MANUAL
Then press SELECT again to choose the second
phase 2, see figure 19.
Figure 19
The triple displays shows the second phase value
of reactive power Kvar, AC voltage V and AC current
A.
Press SELECT again to choose the third phase 3,
see figure 20.
The triple displays shows the third phase value
of reactive power Kvar, AC voltage V and AC
current A.
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. The maximum measuring range is 600kW when
measuring single phase reactive power Kvar, OL wil
be displayed when it is over than that.
7. MAX and MIN are not valid at this measurement
mode.
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
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Model UT233: OPERATING MANUAL
D. Power Factor cos (main display) + AC Voltage
(left secondary display) + AC Current (right
secondary display) Measurement
Warning
4. When measuring 3 phase 4 wires: (see figure 21,
22, 23)
l Press SELECT to choose the first phase
see figure 21.
1,
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 Power Factor (main display) + AC Voltage
(left secondary display) + AC Current (right secondary
display), connect the Meter as follows:
1. Press the MENU to select Power Factor (main display)
+ AC Voltage (left secondary display) + AC Current
(right secondary display) range.
2. 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. The connecting method of 3 phases 4 wires, 3 phases
3 wires or single phase 2 wires, see figure 4, 5 and
6.
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Figure 21
The triple displays shows the first phase value of
power factor cos , AC Voltage V and AC Current
A.
Then press SELECT again to choose the second
phase 2, see figure 22.
Model UT233: OPERATING MANUAL
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.
Figure 22
The triple displays shows the second phase value
of power factor cos , AC Voltage V and AC Current
A.
Press SELECT again to choose the third phase
3, see figure 23.
6. MAX/ and MIN/ are not valid at this
measurement mode.
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 23
The triple displays shows the third phase value of
power factor cos , AC Voltage V and AC Current A.
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Model UT233: OPERATING MANUAL
E. Phase Angle (main display) + AC Voltage (left
secondary display) + AC Current (right
secondary display) Measurement
Warning
4. When measuring 3 phase 4 wires: (see figure 24,
25, 26)
Press SELECT to choose the first phase
see figure 24.
1,
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 Phase Angle (main display) + AC Voltage
(left secondary display) + AC Current (right secondary
display), connect the Meter as follows:
1. Press the MENU to select Phase Angle (main
display) + AC Voltage (left secondary display) + AC
Current (right secondary display) range.
2. 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. The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
4, 5 and 6
28
Figure 24
The triple displays shows the first phase value of
phase angle AC Voltage V and AC Current A.
Then press SELECT again to choose the second
phase 2, see figure 25
Figure 25
Model UT233: OPERATING MANUAL
The triple displays shows the second phase value
of phase angle AC Voltage V and AC Current
A.
Press SELECT again to choose the third phase
3, see figure 26.
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/
mode.
are not valid at this measurement
Note
Figure 26
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.
The triple displays shows the third phase value
of phase angle AC Voltage V and AC Current
A.
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Model UT233: OPERATING MANUAL
F. Frequency Hz (main display) + AC Voltage (left
secondary display) + AC Current (right 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.
3. The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
4, 5 and 6
4. When measuring 3 phase 4 wires: (see figure 27,
28, 29)
Press SELECT to choose the first phase
figure 27.
Frequency Measurement only measures the
frequency of voltage signal not he frequency of
current signal.
To test for Frequency Hz (main display) + AC Voltage
(left secondary display) + AC Current (right secondary
display), connect the Meter as follows:
1. Press the MENU to select Frequency Hz (main
display) + AC Voltage (left secondary display) + AC
Current (right secondary display) range.
2. 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.
30
Figure 27
1, see
Model UT233: OPERATING MANUAL
The triple displays shows the first phase value of
frequency Hz, AC Voltage V and AC Current A.
Then press SELECT again to choose the second
phase 2, see figure 28
Figure 29
Figure 28
The triple displays shows the second phase value
of Frequency Hz AC Voltage V and AC Current A.
Press SELECT again to choose the third phase 3,
see figure 29.
The triple displays shows the third phase value
of Frequency Hz, AC Voltage V and AC Current
A.
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 at this measurement
mode.
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.
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Model UT233: OPERATING MANUAL
G. Active Energy (main display) + Active Power
(left secondary display) + Time (right secondary
display) Measurement
4. Press SELECT to choose one of the three phases
( 1, 2, 3), see figure 30.
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) + Active Power
(left secondary display) + Time (right secondary display),
connect the Meter as follows:
1. Press the MENU to select Active Energy (main
display) + Active Power (left secondary display) +
Time (right secondary display) range.
2. 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. The connecting method of 3 phases 4 wires, 3
phases 3 wires or single phase 2 wires, see figure
4, 5 and 6.
32
Figure 30
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.
Model UT233: OPERATING MANUAL
When the measuring time is over 24 hours or
the Meter is switched to other measuring ranges,
active energy measuring will stop.
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 at this measurement
mode.
6. Press CLEAR to reset the time.
7. USB interface feature is not valid at this measurement
mode.
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.
33
Model UT233: OPERATING MANUAL
H. Phase Sequence
For Phase Sequence Judging, connect the Meter as
follows:
1. Press the MENU to select AC Voltage (main display)
+ AC Voltage (left secondary display) + AC Voltage
(right secondary display) range as figure 31.
Insert red test lead into V1 input terminal.
Insert blue test lead into V2 input terminal.
Insert yellow test lead into V3 input terminal.
Insert black test lead into COM input terminal.
Connect these four test leads to the circuit under
test or the loading of three phases and grounding
terminal
For the loaded return circuit of 3 phases 4 wires, the
Meter shows the phase sequence result as figure
32, 33 and 34:
Red
Blue
Yellow
Black
Figure 32
=phase missing
Figure 31
34
Figure 33
=negative phase
sequence
Figure 34
=positive phase
sequence
Model UT233: OPERATING MANUAL
2. Positive phase sequence is shown as below figure
35.
A
V1 input terminal
corresponding voltage
C
B
Positive phase sequence
V2 input terminal
corresponding voltage
V3 input terminal
corresponding voltage
Figure 35
A, B, C phases
Checking Result
Input Terminal
V1
V2
V3
A
B
C
B
C
A
C
A
B
Positve phase sequence
When V1 input terminal, V2 input terminal and V3
input terminal base on the below table connecting
A phase, B phase and C phase, all three phases
voltage are over 100V, LCD displays positive phase
sequence result
35
Model UT233: OPERATING MANUAL
3. Negative phase sequence is shown as below figure.
When V1 input terminal, V2 input terminal and V3
input terminal base on the below table connecting
A phase, B phase and C phase, all three phases
voltage are over 100V, LCD displays negative phase
sequence result, as figure 36.
Negative phase sequence
A, B, C phases
V1 input terminal
corresponding voltage.
Checking Result
Input Terminal
V1
V2
V3
A
C
B
B
A
C
C
B
A
Negative phase sequence
4. When any one phaseís voltage has no singal or less
than 100V at 3 phases 4 wires overload mode, the
LCD display missing phase result.
5. USB interface feature is not valid at this measurement
mode.
V3 input terminal
corresponding voltage
V2 input terminal
corresponding voltage
Figure 36
A
C
36
B
Note
Postive and negative phase sequence checking
voltage range is 100V ~500V.
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 UT233: OPERATING MANUAL
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
record and recall data
Maximum and Minimum value display: Voltage,
Current, Active Power, Apparent Power and Reactive
Power ranges
Display Backlight
Computer connection: USB
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
energy range.
Analogue Bar Graph
Sampling: High speed: 2 times per second, Low
speed: 1 time per 3 seconds, Mid speed: 1 time per
2 seconds.
Max. Jaw Size: 55mm diameter.
Power: 4 x 1.5V Alkaline battery (LR6 AA)
Dimensions: 303mm x 112mm x 39mm
Weight: Approximate 601g
37
Model UT233: OPERATING MANUAL
B. Environmental Requirements
38
Model UT233: 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
Input Impedance
600 RMS
10M
B. Frequency
Range
20Hz~500Hz
Resolution
1Hz
Accuracy
(0.5%+5)
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Model UT233: OPERATING MANUAL
C. AC Current (True RMS)
Range
40A
100A
400A
1000A
Resolution
Accuracy
Allowable Maximum overload protection current
0.1A
(2%+5)
1000A RMS
1A
D. Active Power ( W=V x A x COS
)
Voltages Range
Current / Voltage
Current
Range
Accuracy
Resolution
40A
100A
400A
1000A
15V
0.60kW
1.50kW
6.00kW
15.00kW
100V
4.00kW
10.00kW
40.00kW
100.0kW
At 15/1000A range: (3%+10) Others: (3%+5)
<100kW: 0.01kW
100kW: 0.1kW
Remarks:
Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS
40
300V
12.00kW
30.00kW
120.0kW
300.0kW
600V
24.00kW
60.00kW
240.0kW
600.0kW
Model UT233: OPERATING MANUAL
E. Apparent Power (VA = V x A)
Voltages Range
Current / Voltage
Current
Range
Accuracy
Resolution
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
At 15/1000A range: (3%+10) Others: (3%+5)
<100kVA: 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 UT233: OPERATING MANUAL
F. Reactive Power (Var = V x A x SIN
)
Voltages Range
Current / Voltage
Current
Range
Accuracy
Resolution
40A
100A
400A
1000A
15V
0.60kVar
1.50kVar
6.00kVar
15.00kVar
100V
4.00kVar
10.00kVar
40.00kVar
100.0kVar
15V/1000A Range: (4%+20)
<100kVar: 0.01kVar
100kVar: 0.1kVar
Remarks:
Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS
42
300V
12.00kVar
30.00kVar
120.0kVar
300.0kVar
Other :
(4%+5)
600V
24.00kVar
60.00kVar
240.0kVar
600.0kVar
Model UT233: 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
For reference only
Measuring Condition
The minimum measuring current 10A
The minimum measuring voltage 45V
Measuring current less than 10A OR
Measuring voltage less than 45V
Remarks:
Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS
H. Phase Angle (PG=acos (PF))
Range
0∞ ~360∞
0∞ ~360∞
Accuracy
1∞
Resolution
1∞
For reference only
Measuring Condition
The minimum measuring current 10A
The minimum measuring voltage 45V
Measuring current less than 10A OR
Measuring voltage less than 45V
Remarks:
Allowable maximum overload protection voltage: 600V RMS
Allowable maximum overload protection current: 1000A RMS
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Model UT233: OPERATING MANUAL
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
44
Model UT233: OPERATING MANUAL
MAINTENANCE
This section provides basic maintenance information
including battery replacement instruction.
high temperature, explosive, inflammable and strong
magnetic field.
B. Replacing the Battery (see figure 37)
Warning
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.
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 37
45
Model UT233: OPERATING MANUAL
Warning
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.
To replace the battery:.
1. Press POWER to turn the Meter off and remove all
the connections from the input terminals
2. Turn the Meterís front case down.
3. Remove the screw from the battery door, and
separate the battery door from the case bottom.
4. Take out the old battery and replace with 4 x 1.5V
battery (LR6).
5. Rejoin the case bottom and the battery compartment,
and reinstall the screw.
46
Model UT233: OPERATING MANUAL
*END*
This operating manual is subject to change without notice.
47
Model UT233: OPERATING MANUAL
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: (852) 2950 9168
Fax: (852) 2950 9303
Email: info@uni-trend.com
http://www.uni-trend.com
48