Testo Testo 760-1 Manual
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
testo 760 · Digital multimeter
Instruction manual
1 Contents
1 Contents
1 Contents ........................................................................ 2
2 Observe prior to use! ................................................... 4
3 Safety instructions ....................................................... 4
4 Intended use ................................................................. 5
5 Overview ....................................................................... 6
5.1. Display and control elements ........................... 6
5.2. LC display ........................................................ 7
5.3. Control key functions ........................................ 8
5.4. Further functions .............................................. 9
5.5. Explanation of icons ......................................... 9
6 Operating the instrument .......................................... 10
6.1. Switching the instrument on ........................... 10
6.2. Switching the background illumination on/off . 10
6.3. Switching the instrument off
(automatically/manually) ....................................... 11
7 Carrying out a measurement ..................................... 11
7.1. Preparing for measurement ........................... 11
7.2. Voltage measurement .................................... 12
7.3. Current measurement .................................... 12
7.3.1. testo 760-1 .............................................................. 12
7.3.2. testo 760-2/-3 .......................................................... 13
7.3.2.1. 10 A jack ................................................. 13
7.3.2.2. µA/mA jack ............................................. 14
7.3.3. Clamp meter adapter option (0590 0003)
(testo 760-2/-3) .................................................... 14
7.4. Measuring resistance, capacitance,
continuity and diode test ....................................... 15
7.4.1. testo 760-1 .............................................................. 15
7.4.2. testo 760-2/-3 .......................................................... 15
7.5. Frequency measurement (testo 760-1) .......... 16
7.6. Frequency measurement/duty cycle
(testo 760-2/-3) ..................................................... 16
7.7. Temperature measurement (optional)
(testo 760-2/-3) ..................................................... 16
2
1 Contents
8 Service and maintenance .......................................... 17
8.1. View of the back of the instrument ................. 17
8.2. Replacing the batteries .................................. 17
8.3. Changing the fuses ........................................ 17
8.4. Maintenance .................................................. 18
8.5. Calibration ..................................................... 18
8.6. Storage .......................................................... 18
8.7. Cleaning ........................................................ 18
9 Technical data ............................................................ 19
9.1. General technical data ................................... 19
9.2. More technical data ....................................... 20
9.2.1. testo 760-1 overload protection (10 A fuse)........... 20
9.2.2. testo 760-2/-3 Overload protecti o n (10 A fus e) ..... 21
10 Tips and assistance ................................................. 23
10.1. Questions and answers ............................... 23
10.2. Accessories and spare parts ....................... 24
11 Protecting the environment .................................... 24
3
3 Safety instructions
2 Observe prior to use!
• The instruction manual contains information and instructions which are
necessary for operating and using the instrument safely. Before using
the instrument, read the instruction manual carefully and comply with
all aspects of it. Keep this document to hand so that you can refer to it
when necessary. Forward this documentation to an y subsequent users
of the instrument.
• If the manual is not followed, or if you fail to observe the warnings and
instructions, there is a risk of fatal injury to the user and damage to the
instrument.
3 Safety instructions
• The instrument may only be used by trained personnel. During all
operations, please observe the Employers' Liability Insurance
Association provisi ons f or healt h and safety at work.
• In order to prevent electric shock, take safety precautions when
working with voltages greater than 120 V (60 V) DC or 50 V (25 V)
rms. AC. These values are the limit for contact voltages in accordance
with DIN VDE (values in brackets apply to restricted areas, for example
agricultural sectors).
• The measuring instrument may only be used in 16 A fused electrical
circuits up to a nominal voltage of 600 V (testo 760-1 and -2) / 1000 V
(testo 760-3). The nominal cross-section of the connection cable must
be taken into account in order to ensure safe connection (e.g. via
crocodile clips).
• Measurements that are dangerously close to electrical installations
must only be carried out under the direction of a qualified electrician,
not by oneself.
• The instrument may only be touched at the designated grip areas, the
display elements must not be covered.
• If the safety of the operator and his surroundings can no longer be
guaranteed, the instrument must be taken out of service and prevented
from being used inadvertently. This is the case if the instrument:
• Is obviously damaged. e.g.
- Housing breakag es
- Defective test leads
- Leaking batteries
• Does not carry out the required measurements
• Has been stored too long in unfavourable conditions
• Has been exposed to mechanical stresses during transit.
• Prevent the instrument from being heated due to exposure to direct
sunlight. This is the only way to guarantee the instrument will function
perfectly and have a long service life.
• If the instrument needs to be opened, e.g. to change a fuse, this may
only be carried out by a qualified specialist. Prior to opening, the
instrument is to be switched off and disconnected from all electrical
circuits.
• Maintenance work that is not described in this documentation must
only be carried out by trained service technicians.
• If the instrument is modified in any way, operational safety can no
longer be guaranteed.
• Only use test leads and terminals listed in the Accessories and spare
parts section in this documentation.
4
4 Intended use
• Modifications or alterations to the instrument will result in the complete
invalidation of any warranty or guara nt e e claim s against the
manufacturer.
• It is not permitted to use the instrument in an explosive environment.
• Before and after use, always check that the instrument is in peak
working order. Test the ins trum e nt at a known voltage source.
• The instrument must not be used while its battery compartment is
open.
• Batteries must be checked before use and changed if necessary.
• Storage areas must be dry.
• If there is any battery leakage, the instrument must no longer be used
until it has been checked by our Customer Service.
• The battery acid (electrolyte) is highly alkaline and electrically
conductive. Risk of acid burn! If the battery acid comes into contact
with your skin or clothing, thoroughly rinse the areas affected
immediately with plenty of water. If battery acid gets into yo u r e yes,
rinse them immediately with plenty of water and seek medical advice.
4 Intended use
The instrument may only be used under the conditions and for the purpose
for which it was designed:
• testo 760-1 conforms to measurement category CAT III with a rated
voltage of 600 V to earth.
Measurement category CAT III is for use in electrical circuits in building
installation, e.g. distributors, circuit breakers, cabling, sockets,
switches, instruments for industrial use, permanently installed motors.
• testo 760-2 and testo 760-3 conform to measurement category CAT IV
with a rated voltage of 600 V to earth.
The CAT IV measurement category is used at the source of low
voltage installations, e.g. building connection, main fuse, and meter.
The instrument may only be used in the fields of application defined in the
instruction manual. Any application deviating from this is considered to be
improper and unchecked use and may result in accidents or instrument
damage. Any improper use will completely void any right to claims under
Testo’s guarantee an d warr ant y.
The manufacturer is not responsible for damage to property or personal
injury caused by the following:
• Failure to observe the instruction manual
• Instrument modifications not approved by the manufacturer
• The use of spare parts not approved by the manufacturer
• Use under the influence of alcohol, drugs or medication
The instrument must not be used for the following purposes:
• In potentially explosive atmospheres: the instrument is not explosionproof!
• When there is rain or other precipitation: risk of electric shock!
Test Equipment Depot - 800.517.8431
99 Washington Street
, Melrose, MA 02176
TestEquipmentDepot.com
5
5 Overview
5 Overview
5.1. Display and control el ements
1 Control keys
2 LC display
3 Grip area
4 On the rear: battery compartment and bracket for the probe tips
5 On the rear: stand
6 Input jack
• testo 760-1: voltage, resistance, continuity, diode, capacitance and
frequency measurements
• testo 760-2/-3: voltage, resistance, continuity, diode, capacitance,
frequency, duty cycle and temperature measurements
7 Ground/COM jack for all measurements
8 Input jack for AC and DC mA/µA current measurement (up to 600 mA)
(testo 760-2/-3 only)
9 Input jack for AC and DC current measurement up to 10 A
6
5.2. LC display
5 Overview
1 Direct current/voltage
2 Alternating current/voltage
3 Diode test and diode continuity
4 Low-pass filter
5 AUTO mode is the default setting in all measuring modes
6 Dangerous voltage, AC ≥ 50 V, DC ≥ 120 V
7 Maximum, minimum, average measurement
8 Hold is activated, LC displ a y hol ds the curr en t rea ding
9 Battery capacity display
Display Feature
No Symbol Battery capacity 100 – 30%
Battery capacity 30 - 15%
Battery capacity 15 - 2%
Battery capacity 2 – 0%, instrument switches off
flashes and
acoustic
signal emitted
10 Automatic power-off function is activated
11 Measuring units
12 Analog display (testo 760-2/-3 only)
13 Indication of polarity in bar chart (testo 760-2/-3 only)
automatically
7
5 Overview
5.3. Control key functions
Key Brief keypress function
On/off
Voltage
Current
testo 760-1
RCDC control
testo 760-2/-3
RCDC control
(<1 s)
Switch the instrument on
LC display illumination
on/off
Manual mode, switches
between AC and DC
measurements and mV and
V ranges.
Switch to AUTO voltage
mode when the instrument
is in RCDC measuring
mode.
Activates manual mode,
switch between AC and DC
measuring mode and
between mA and µA
ranges (testo 760-2/-3
only).
Switch between resistance,
capacitance, diode and
continuity
Activates manual mode,
switch between resistance,
capacitance, diode and
continuity
Enable/disable the HOLD
function (refresh LC display
on/off)
testo 760-2/-3 only
- in AC voltage
measurement mode:
LPF (low-pass filter)
on/off
- switches between
frequency
measurement and
duty cyc le
- in AC current
measurement mode:
LPF (low-pass filter)
on/off
Switches between MAX,
MIN and AVG functions
Long keypress function (>2 s)
Switch the instrument off
Back to AUTO mode
Back to AUTO mode
-
Back to AUTO mode
Temperature measurement
(with thermocouple ada pter
connected)
-
In voltage measurement mode:
enables/disables the frequency
measurement/dut y c ycle
Switch off recording mode
8
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