TENMA UT-204 User Manual
Clamp Meter
TRMS
Page <1> 20/09/10 V1.1
http://www.farnell.com
http://www.newark.com
http://www.cpc.co.uk
Table of Contents
Title Page
Overview --------------------------------------------------------------------------------------------------------------- 2
Unpacking Inspection -------------------------------------------------------------------------------------------------- 2
Safety Information ------------------------------------------------------------------------------------------------------ 2
Rules for Safe Operation -------------------------------------------------------------------------------------------- 3
International Electrical Symbols ----------------------------------------------------------------------------------- 4
The Meter Structure --------------------------------------------------------------------------------------------------- 4
Rotary Switch ---------------------------------------------------------------------------------------------------------- 5
Functional Buttons --------------------------------------------------------------------------------------------------- 5
The Effectiveness of Functional Buttons ----------------------------------------------------------------------- 5
Display Symbols ------------------------------------------------------------------------------------------------------- 6
Measurement Operation --------------------------------------------------------------------------------------------- 7
A. DC/AC Voltage Measurement ---------------------------------------------------------------------- 7
B. Measuring Resistance -------------------------------------------------------------------------------- 7
C. Testing Diodes ----------------------------------------------------------------------------------------- 8
D. Testing for Continuity ------------------------------------------------------------------------------ 8
E. Frequency Measurement ---------------------------------------------------------------------------- 9
F. Duty Cycle Measurement ---------------------------------------------------------------------------- 9
G. DC/AC Current Measurement ---------------------------------------------------------------------- 10
Sleep Mode ------------------------------------------------------------------------------------------------------------- 10
Specifications --------------------------------------------------------------------------------------------------------- 11
A. General Specifications ------------------------------------------------------------------------------ 11
B. Environmental Requirements ------------------------------------------------------------------ 11
Accuracy Specifications ----------------------------------------------------------------------------------------- 12
A. DC Voltage ----------------------------------------------------------------------------------------- 12
B. AC Voltage ----------------------------------------------------------------------------------------- 12
C. Resistance ----------------------------------------------------------------------------------------- 13
D. Diode Test ----------------------------------------------------------------------------------------- 13
E. Continuity Test ---------------------------------------------------------------------------------------- 13
F. Frequency ----------------------------------------------------------------------------------------- 14
G. Duty Cycle ----------------------------------------------------------------------------------------- 14
H. DC Current ----------------------------------------------------------------------------------------- 14
I. AC Current ----------------------------------------------------------------------------------------- 15
Maintenance ----------------------------------------------------------------------------------------------------- 16
A. General Service -------------------------------------------------------------------------------------- 16
B. Replacing the Battery ----------------------------------------------------------------------------- 16
Clamp Meter
Trms
Page <2> 20/09/10 V1.1
http://www.farnell.com
http://www.newark.com
http://www.cpc.co.uk
Overview
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 “Safety Information” and “Rules for Safe Operation” carefully before
using the Meter.
Digital Multimeter Model UT204 (hereafter referred to as “the Meter”) are 3 3/4 digits with steady operations, fashionable
structure and highly reliable 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 not only measure AC/DC Voltage, AC/DC Current, Frequency, Duty Cycle, Resistance, Diodes, Continuity but also it
has Data Hold, Sleep Mode and Relative Mode features.
UT204 has an extra True RMS feature.
Unpacking Inspection
Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part:
Item Description Quantity
1 English Operating Manual 1 piece
2 Test Lead
1 pair
3 Carrying Bag 1 piece
4 9V Battery (NEDA1604, 6F22 or 006P) 1 piece
In the event you find any missing or damage, please contact your dealer immediately.
Safety Information
This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. II 600V, CAT. III 300V) and
double insulation.
CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient overvoltages than CAT. III. CAT.
III: Distribution level, fixed installation, with smaller transient overvoltages than
CAT. IV
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 in this Operating Manual are explained on page 4.
Clamp Meter
Trms
Page <3> 20/09/10 V1.1
http://www.farnell.com
http://www.newark.com
http://www.cpc.co.uk
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. Check the test leads for continuity. Replace damaged test leads
with identical model number or electrical specifications before using the Meter.
••
Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and grounding.
If the value to be measured is unknown, use the maximum measurement position and reduce the range step by step until a
satisfactory reading is obtained.
••
When measurement has been completed, disconnect the connection between the test leads and the circuit under test, remove the
testing leads away from the input terminals of the Meter and turn the Meter power off.
••
The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is
conducted to prevent damage of the Meter.
••
Do not carry out the measurement when the Meter’s back case and battery compartment are not closed to avoid electric shock.
••
Do not input higher than 600V between the two Meter’s input terminal to avoid electric shock and damages to the Meter.
••
When the Meter working at an effective voltage over 60V in DC or 30V rms in AC, special care should be taken for there is danger
of electric shock.
••
Use the proper terminals, function, and range 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.
••
When using the test leads, keep your fingers behind the finger guards.
••
Disconnect circuit power and discharge all high -voltage capacitors before testing resistance, continuity and diode.
••
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.
••
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.
Clamp Meter
Trms
Page <4> 20/09/10 V1.1
http://www.farnell.com
http://www.newark.com
http://www.cpc.co.uk
••
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.
International Electrical Symbols
AC (Alternating Current).
DC (Direct Current).
AC or DC.
Grounding.
Double Insulated.
Warning. Refer to the Operating Manual.
Deficiency of Built-In Battery
Continuity Test.
Diode.
Fuse.
Application around and removal from HAZARDOUS LIVE conductors is permitted.
Conforms to Standards of European Union.
The Meter Structure (see figure 1)
1. Input Terminals
2. LCD Display
3. Functional Buttons
4. Rotary Switch
5. Trigger: press the lever to open the transformer jaws. When the pressure on the
lever is released, the jaws will close.
6. Hand Guards: to protect user’s hand from touching the dangerous area.
7. 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.
Clamp Meter
Trms
Page <5> 20/09/10 V1.1
http://www.farnell.com
http://www.newark.com
http://www.cpc.co.uk
Functional Buttons
Below table indicated for information about the functional button operations.
Rotary Switch Position Function
OFF Power is turned off.
AC/DC voltage measurement.
ΩΩ
Resistance measurement.
: Diode
: Continuity Test
Frequency Measurement and Duty Measurement
AC and DC current measurement range
Button Operation Performed
HOLD
••
Press HOLD to enter the Hold mode in any mode, the Meter beeps.
••
Press HOLD again to exit the Hold mode, the Meter beeps.
REL∆
••
Press to select manual ranging measurement mode. The meter is default to auto ranging
measurement mode.
••
When the Meter is at manual ranging measurement mode, press to step down the range.
At range:
••
Press to enter the REL mode.
••
It subtracts a stored value from the present measurement value and displays a result.
At Hz/Duty% range:
••
Press to switch between Hz measurement mode and Duty % measurement mode.
SELECT
••
Press SELECT button to select the alternate functions marked in blue colour on the Meter’s faceplate
including
••
After the Meter entering Sleep Mode, press and hold SELECT to
turn the Meter on, it will disable the Sleep Mode feature.
The Effectiveness of Functional Buttons
Not every functional buttons can be used on every rotary switch positions. Below two tables describe which functional buttons can be
used on which rotary switch positions
Model: UT201
Rotary Switch
Positions
Functional Buttons
SELECT
REL∆
HOLD
• • •
N/A
• •
•
N/A
•
N/A
• •
• • •
• • •
Rotary Switch
Below table indicated for information about the rotary switch positions.
At and
ΩΩ
range
::
Loading...