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.
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.
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 any subsequent users of the instrument.
4 Intended use • • • • • • • • Modifications or alterations to the instrument will result in the complete invalidation of any warranty or guarantee claims 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 instrument at a known voltage source. The instrument must not be used while its battery compartment is open.
5 Overview 5 Overview 5.1.
5 Overview 5.2.
5 Overview 5.3. Control key functions Key On/off Voltage Current testo 760-1 Brief keypress function (<1 s) Long keypress function (>2 s) Switch the instrument on LC display illumination on/off Switch the instrument off Back to AUTO mode 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.
5 Overview 5.4. Further functions MAX/MIN/AVG [ ] enables switching between maximum, minimum and the periodic display of AVG values. This function is disabled in the default setting. > > Activate function: press [ ] <1 s. Max value is displayed. Display min value and periodic display of AVG values: press [ ] <1 s each time. > Exit function: press [ ] >2 s or [ ].
6 Operating the instrument Icon Meaning The product is certified for the US and Canadian markets, in accordance with the applicable American and Canadian standards. Tested for safety (tested by TÜV Rheinland) Compliance mark for ACMA (Australian Communications and Media Authority) guidelines.
7 Carrying out a measurement 6.3. Switching the instrument off (automatically/manually) Automatically The automatic power-off function (APO) is always enabled as a default setting and is shown on the LC display as APO. If no control key is pressed within 15 min, the instrument switches off automatically. If necessary, the automatic power-off function (APO) can be turned off.
7 Carrying out a measurement 7.2. Voltage measurement ✓ Instrument is switched on. When measuring AC voltage, the frequency is measured at the same time and shown in the relevant row on the LC display. . Automatic measuring mode 1. Connect test leads: black test lead to the COM jack; red test lead to the V/Ω/diode/capacitance jack. The instrument features a built-in zero crossing detector.
7 Carrying out a measurement Automatic measuring mode 1. Connect test leads: black test lead to COM jack, red test lead to A jack. The instrument is in AUTO A mode. 2. Connect test leads to the test object. The measured value is shown on the LC display. Manual measuring mode ✓ Instrument is in AUTO A measuring mode. 1. Switch off automatic measuring mode: press [ 2. - Switch between A AC and A DC: press [ ] <1 s. The measured value is shown on the LC display. ] <1 s.
7 Carrying out a measurement Switch to automatic measuring mode: press [ ] >1 s. The instrument is in automatic measuring mode when AUTO is illuminated on the LC display. 7.3.2.2. µA/mA jack ✓ Instrument is switched on. Automatic measuring mode 1. Connect test leads: black test lead to COM jack, red test lead to µA/mA jack. The instrument is in AUTO µA/mA mode. 2. Connect test leads to the test object. The measured value is shown on the LC display.
7 Carrying out a measurement 3. 4. 5. - Activate mV AC measuring mode for continuity test: press [ times. Switch on the clamp meter adapter. LED indicates readiness for operation. Place the cables being measured centrally within the clamp. The measured value is shown on the LC display. ]3 7.4. Measuring resistance, capacitance, continuity and diode test WARNING Serious risk of injury to the user and/or destruction of the instrument during resistance testing. > Test object must be de-energized.
7 Carrying out a measurement Manual measuring mode (testo 760-2/-3) 1. 2. Disable AUTO RCDC measuring mode: press [ ] <1 s. Switch between resistance, capacitance, continuity and diode test: - press [ ] <1 s. The measured value is shown on the LC display. > Switch back to AUTO RCDC mode: press [ ] >2 s. 7.5. Frequency measurement (testo 760-1) ✓ Instrument is switched on. 1. Connect test leads: black test lead to the COM jack; red test lead to the V/Ω/diode/capacitance jack.
8 Service and maintenance - The measured values are indicated in °C and °F on the LC display. 8 Service and maintenance 8.1. View of the back of the instrument Screws 1 - 6: housing Screws 7 and 8: open the battery compartment 8.2. Replacing the batteries The batteries need to be replaced when the battery icon appears on the LC display. ✓ Instrument is switched off and de-energized. 1. Fully disconnect the instrument from the test leads. 2.
8 Service and maintenance 5. Remove the defective fuse from the fuse holder using an appropriate fuse puller. WARNING Serious risk of injury and destruction of the instrument due to makeshift fuses and short-circuiting of fuse holders. > Only use fuses with the voltage and current values listed under "Technical data". 6. 7. 8. Insert the new fuse into the fuse holder using the fuse puller. Put the lower section of the housing on and screw on using the screws. Fold in the stand. 8.4.
9 Technical data 9 Technical data 9.1. General technical data Feature Values Operating temperature 0 °C to 40 °C Storage temperature -15 °C to 50 °C Humidity 0 to 80% RH Operating altitude Up to 2000 m Measurement category testo 760-1: CAT III / 600 V testo 760-2: CAT IV/600 V testo 760-3: CAT IV/600 V Level of contamination 2 Protection class IP 64 only valid when using the silicone caps Power supply 3 × 1.5V (AAA/IEC LR03) Battery status display Display Batt. icon appears from <3.
9 Technical data 9.2. More technical data 9.2.1. testo 760-1 overload protection (10 A fuse)1 Feature Measuring range Resolutio Accuracy n DC voltage 400 mV 4.000 V 40.00 V 400.0 V 600 V 0.1 mV 1 mV 10 mV 100 mV 1V ± (0.8% of meas. val. + 3 digits) AC voltage2,3,4 400 mV 4.000 V 40.00 V 400.0 V 600 V 0.1 mV 1 mV 10 mV 100 mV 1V ± (1.0% of meas. val. + 3 digits) DC current 4A 10 A 1 mA 10 mA ± (1.5% of meas. val. + 5 digits) AC current2,3,4 4A 10 A 1 mA 10 mA ± (1.5% of meas. val.
9 Technical data Feature Measuring range Resolutio Accuracy n 100.0 µF6 0.1 µF ± 10% typically Frequency measurement7,8 5.120 Hz 51.20 Hz 512.0 Hz 5.120 kHz 51.20 kHz 512.0 kHz 0.001 Hz 0.01 Hz 0.1 Hz 1 Hz 10 Hz 100 Hz ± (0.1% + 1 digit) Frequency with voltage/current9 99.99 Hz 999.9 Hz 9.999 kHz 0.01 Hz 0.1 Hz 1 Hz ± (0.1% + 1 digit) Figures correspond to +23 °C ± 5 °C at <80% rel. humidity. Temperature coefficient: 0.15 x specified accuracy per 1 °C (<18 °C and >28 °C) 9.2.2.
9 Technical data Feature Measuring range Resolution Accuracy DC current 600 μA 6000 μA 60.00 mA 600.0 mA 6A 10 A 0.1 μA 1 μA 10 μA 100 μA 1 mA 10 mA ± (1.5% of meas. val. + 5 digits) AC current11,12,13 600 μA 6000 μA 60.00 mA 600.0 mA 6A 10 A 0.1 μA 1 μA 10 μA 100 μA 1 mA 10 mA ± (1.5% of meas. val. + 5 digits) Resistance 60.00 Ohm 600.0 Ohm 6.000 kOhm 60.00 kOhm 600.0 kOhm 6.000 MOhm 60.00 MOhm 0.01 Ohm 0.1 Ohm 1 Ohm 10 Ohm 100 Ohm 1 kOhm 10 kOhm ± (1.5% of meas. val.
10 Tips and assistance Feature Measuring range Resolution Accuracy Frequency measurement17,18 600.0 Hz 6.000 kHz 60.00 kHz 600.0 kHz 6.000 MHz 60.00 MHz 0.1 Hz 1 Hz 10 Hz 100 Hz 1 kHz 10 kHz ± (0.1% + 1 digits) Frequency with voltage/current19 99.99 Hz 999.9 Hz 9.999 kHz 0.01 Hz 0.1 Hz 1 Hz ± (0.1% + 1 digits) Temperature with adapter20 -20 to 500 °C 0.2 °C -20 to 0 °C ± 2 °C 0 to 99.99 °C ± 1 °C 100 to 249.99 °C ± 1.5% >250 °C ± 2% Current with adapter21 400 A 0.1 A ± (2% of meas. val.
11 Protecting the environment Question Possible causes/solution Defective fuse indication If a fuse for the A (testo 760-1, mA and/or 10A (testo 760-2/-3) jack is defective, the instrument will no longer detect the corresponding jack. Instrument will not switch to A-mode. > Replace defective fuse. If we have not been able to answer your question, please contact your dealer or Testo Customer Service. For contact details, please visit www.testo.com/service-contact. 10.2.
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