Tenmars TM-507 User Manual
INSULATION TESTER
TM-507
HB2TM5070000
CONTENTS
1. SAFETY PRECAUTIONS AND PROCEDURES...............................................................................................2
1.1. Preliminary instructions ............................................................................................................................2
1.2. During use ................................................................................................................................................3
1.3. After use ...................................................................................................................................................3
1.4. Overvoltage categories - definitions .........................................................................................................3
2. GENERAL DESCRIPTION ................................................................................................................................4
2.1. Working ....................................................................................................................................................4
3. PREPARATION FOR USE ................................................................................................................................4
3.1. Preliminary checks ...................................................................................................................................4
3.2. Power supply ............................................................................................................................................4
3.3. Calibration ................................................................................................................................................4
3.4. Storage .....................................................................................................................................................4
4. OPERATING INSTRUCTIONS .........................................................................................................................5
4.1. Instrument - Description ...........................................................................................................................5
4.1.1. Turning on ...................................................................................................................................................5
4.1.2. Auto power off .............................................................................................................................................5
4.2. : DC voltage measurement ...................................................................................................................6
4.2.1. Anomalous cases which may occur during measurements ......................................................................6
4.3. : AC voltage measurement ...................................................................................................................7
4.3.1. Anomalous cases which may occur during measurements ......................................................................7
4.4. Ω : Resistance measurement and continuity test .................................................................................8
4.4.1. "ZERO" mode .............................................................................................................................................. 9
4.4.2. Anomalous cases which may occur during Ω measurement ................................................................10
4.5. LoΩ: Continuity test on earth, protective and equalizing potential conductors .......................................11
4.5.1. "ZERO" mode ............................................................................................................................................ 12
4.5.2. Anomalous cases which may occur during LoΩ measurement .................................................................13
4.6. MΩ:Insulation resistance measurement test voltage 250V, 500V, 1000V DC .......................................14
4.6.1. Measurement time setting mode ...............................................................................................................15
4.6.2. Anomalous cases which may occur during MΩ tests.................................................................................15
5. AINTENANCE .................................................................................................................................................16
5.1. General...................................................................................................................................................16
5.2. Battery replacement ...............................................................................................................................16
5.3. Cleaning .................................................................................................................................................16
5.4. End of life................................................................................................................................................16
6. TECHNICAL SPECIFICATIONS .....................................................................................................................17
6.1. Characteristics........................................................................................................................................17
6.1.1. Electrical ....................................................................................................................................................18
6.1.2. Safety standards........................................................................................................................................ 18
6.1.3. General specifications ...............................................................................................................................18
6.2. ENVIRONMENT .....................................................................................................................................18
6.2.1. Environmental conditions...........................................................................................................................18
6.2.2. EMC...........................................................................................................................................................18
6.3. ACCESSORIES......................................................................................................................................18
7. SERVICE.........................................................................................................................................................19
7.1. Warranty conditions................................................................................................................................19
7.2. After-sale service....................................................................................................................................19
TM-507
EN - 2
1. SAFETY PRECAUTIONS AND PROCEDURES
This instrument complies with safety Standards EN61557 and EN61010-1 related to electronic
measuring instruments.
CAUTION
For your own safety and to avoid damaging the instrument follow the
procedures described in this instruction manual and read carefully all notes
preceded by this symbol
.
When taking measurements:
avoid doing that in humid or wet places - make sure that humidity is within the limits indicated in
section “environmental conditions”.
avoid doing that in rooms where explosive gas, combustible gas, steam or excessive dust is
present.
keep you insulated from the object under test.
do not touch exposed metal parts such as test lead ends, sockets, fixing objects, circuits etc.
avoid doing that if you notice anomalous conditions such as breakages, deformations, fractures,
leakages of battery liquid, blind display etc.
be particularly careful when measuring voltages exceeding 25V in particular places (building
yards, swimming pools, etc.) and 50V in ordinary places to avoid risks of electrical shocks.
The following symbols are used:
CAUTION - refer to the instruction manual - an improper use may damage the
instrument or its components
DC voltage
AC voltage
1.1. PRELIMINARY INSTRUCTIONS
This instrument has been designed for use in environments of pollution degree 2.
It can be used for tests on electrical installations of overvoltage category III 265V and 550V
maximum rated interlinked voltage (and to earth).
You are recommended to respect the usual safety regulations aimed at protecting you against
dangerous currents and protecting the instrument against improper use.
Only the original test leads supplied along with the instrument guarantee compliance with the
safety Standards in force. They must be in a good conditions and, if necessary, replaced with
identical ones.
Do not test nor connect to any circuit exceeding the specified overload protection.
Do not take measurements under environmental conditions exceeding the limits indicated in this
manual.
Make sure that batteries are correctly installed.
Before connecting the test probes to the installation make sure that the right function is chosen.
TM-507
EN - 3
1.2. DURING USE
CAUTION
An improper use may damage the instrument and/or its components or injure
the operator.
Before selecting any function, first disconnect the test leads from the circuit under test.
When the instrument is connected to circuits never touch any unused terminal.
Do not measure resistance in presence of external voltages; although the instrument is protected,
an excessive voltage may cause malfunctioning.
CAUTION
If the “low battery” symbol is displayed during use interrupt testing and replace
batteries following the procedure described in paragraph 5.2.
1.3. AFTER USE
Disconnect the test leads from the circuit under test and switch off the instrument.
If you expect not to use the instrument for a long period remove batteries.
1.4. OVERVOLTAGE CATEGORIES - DEFINITIONS
Standard EN61010-1 (Safety requirements for electrical equipment for measurement, control and
laboratory use, Part 1: General requirements) defines what a measurement category (usually called
“overvoltage category”) is. At paragraph 6.7.4: Measuring circuits it says:
(OMISSIS)
Circuits are divided into the following measurement categories:
• Measurement category IV is for measurements performed at the source of the low-voltage
installation.
Examples are electricity meters and measurements on primary overcurrent protection devices
and ripple control units.
• Measurement category III is for measurements performed in the building installation.
Examples are measurements on distribution boards, circuit breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for
industrial use and some other equipment, for example, stationary motors with permanent
connection to fixed installation.
• Measurement category II is for measurements performed on circuits directly connected to the
low voltage installation.
Examples are measurements on household appliances, portable tools and similar equipment.
• Measurement category I is for measurements performed on circuits not directly connected to
MAINS.
Examples are measurements on circuits not derived from MAINS, and specially protected
(internal) MAINS-derived circuits. In the latter case, transient stresses are variable; for that
reason, the norm requires that the transient withstand capability of the equipment is made
known to the user.
TM-507
EN - 4
2. GENERAL DESCRIPTION
Dear Customer, the instrument you have purchased, whether used according to the instructions
given in this manual, will grant you accurate and reliable measurements. Thanks to a development of
newest conception assuring double insulation and overvoltage category III you will enjoy the highest
safety.
2.1. WORKING
1000V - MΩ: insulation resistance measurement with test DC voltage of 1000V
500V - MΩ: insulation resistance measurement with test DC voltage of 500V
250V - MΩ: insulation resistance measurement with test DC voltage of 250V
LoΩ: continuity test on earth, protective and potential equalising conductors with a test current
higher than 200mA and open voltage ranging from 4V to 24V
Ω
: measurement of resistance / continuity with sound signal
: AC voltage measurement
: DC voltage measurement
3. PREPARATION FOR USE
3.1. PRELIMINARY CHECKS
This instrument was checked both mechanically and electrically prior to shipment. All possible cares
and precautions were taken to let you receive the instrument in perfect conditions. Notwithstanding
we suggest you to check it rapidly (eventual damages may have occurred during transport – if so
please contact the local distributor from whom you bought the item). Make sure that all standard
accessories mentioned in paragraph 6.3. are included. Should you have to return back the instrument
for any reason please follow the instructions mentioned in paragraph 7.
3.2. POWER SUPPLY
The instrument is powered by batteries (refer to paragraph 6.3 for details on model, no. and battery
life). When batteries are low, a low battery indication is displayed. To replace/insert batteries follow
the instructions indicated in paragraph 5.2.
3.3. CALIBRATION
The instrument complies with the technical specifications contained in this manual and such
compliance is guaranteed for 1 year. Annual recalibration is recommended.
3.4. STORAGE
After a period of storage in extreme environmental conditions exceeding the limits mentioned in
paragraph 6.2.1 let the instrument resume normal measuring conditions before using it.
TM-507
EN - 5
4. OPERATING INSTRUCTIONS
4.1. INSTRUMENT - DESCRIPTION
LEGEND:
1. Inputs
2. Inputs
3. Display
4. ON/OFF key
5. LOCK key
6. ZERO and backlight key
7. GO key
8. FUNC HOLD key
Fig. 1: Instrument description
key to switch on/off the instrument
LOCK key to select the continuous mode measurement and to set the insulation
measurement time
ZERO key to calibrate the cables being used
key to on and off the backlight
GO key to start a measurement
ARROW keys to select measurements
4.1.1. Turning on
When the instrument is turned on all display segments are lit for just a while. Then the instrument is
ready for DC voltage measurement.
4.1.2. Auto power off
The instrument automatically turns off 15 minutes after last pressure of keys. To resume operation
turn on the instrument again. When the instrument must be used for long voltage measurements, the
operator may need to disable the auto power off function. In order to do so press the LOCK key. On
next switch on autopower off will be automatically restored.
On the instrument’s LCD the symbol
is displayed only when auto power off is active.
TM-507
EN - 6
4.2. : DC VOLTAGE MEASUREMENT
CAUTION
The maximum input voltage is 550+10%V. Don’t try to measure higher
voltages to avoid risks of electrical shocks or serious damages to the
instrument.
Fig. 2:
Connection of the instrument’s terminals during
test
1.
Turn on the instrument
2.
Press the arrow keys to select
3. Insert the black and red cables in the corresponding input terminals of the instrument
4. If necessary, insert the croco clips on the test probes
5. Connect the cables to the desired points of the circuit under test as shown in Fig. 2. The voltage
value will be displayed
6.
DC voltage value
Example of display of DC voltage value
4.2.1. Anomalous cases which may occur during measurements
1.
The maximum input voltage is
550+10%V.
If the detected voltage value exceeds
605V RMS the instrument displays the
screen beside.
Disconnect immediately the instrument
from the circuit under test to avoid
electrical shocks and damages to the
instrument.
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