English
GREAT BRITAIN • customer service tel: 0845 300 9799 e-mail: [email protected] internet: www.clasohlson.com/uk
Ver
. 20140228
USB Multimeter
Art.no 36-4717 Model UT61D
Note:
This is only a quick-start guide. For complete instructions
please refer to the accompanying CD.
Please read the entire instruction manual before use and save it for
future reference. We reserve the right for any errors in text or images
and for making any necessary technical changes to this document.
If you should have any questions concerning technical problems
please contact our Customer Services.
1. Safety instructions
• This meter is designed for indoor use.
• Do not use this meter if it or the test leads appear to be
damaged, or if you suspect that the meter might not work
properly.
• Make sure that your fingers are behind the finger guards when
using the test leads.
• Make sure that the power is turned off before working on
the power circuit. Even low voltages can be dangerous!
• To avoid shocks you need to be careful when you work with
voltage higher then 60 V DC or 30 V AC RMS. Voltages higher
than this pose a risk of heavy electric shocks.
• Set the right measuring range using the selector before
starting to measure and do not change the range whilst taking
a measurement.
• This meter is protected by fuses, but they will not protect
the meter from all kinds of misuse.
2. Functions
3. [ Range ]
• Press once to enter manual settings mode; the buzzer
sounds once.
• Press repeatedly to advance through the measuring ranges;
the buzzer sounds.
• Hold in for two seconds to return to
Autorange
(automatic
measuring range setup).
4. [ Hold/Light ]
• Press to save a reading (data hold function), press once
more to delete the reading.
• Hold in for two seconds to turn on the display backlight for
10 seconds.
5. Multifunction selector
8 different measuring functions and off switch.
6.
Test lead sockets
7.
Test lead sockets
8. [ REL
▲
/RS 232 (USB) ]
• Press once to enter REL mode.
• Press once to exit REL mode.
• Hold in for two seconds to activate or deactivate the RS232/
USB function. The sleep function is exited when the RS232/
USB function is activated and
disappears from
the display.
9. [ Hz % ]
• Press to measure frequency.
• Press to select Duty Cycle value.
10. Alternative functions (blue button)
Press to select alternative functions for the settings modes
in blue.
11.
Test lead sockets
12.
Test lead sockets
Display symbols
The data hold function is activated.
The sleep mode is activated.
Indicates a negative reading.
Indicator for AC measurement.
Indicator for DC measurement.
The Autorange is activated (meter automatically selects
the range with best resolution).
Indicator for manual range mode (not on this model).
The reading is too high for this measuring range.
Indicator for the diode test.
The continuity buzzer is activated.
Maximum and minimum reading.
Data output in progress (USB/RS232).
Low battery warning – replace the battery.
REL is activated, the stored value minus the present value
is displayed.
Resistance, Ω Ohm, kΩ (kiloohm), MΩ (megaohm).
Voltage, mV (millivolt), V (volt).
Current, μA (microampere), mA (milliampere),
A (ampere).
Capacitance; nF (nanofarad), μF (microfarad),
mF (millifarad).
Frequency, Hz (hertz), kHz (kilohertz),
MHz (megahertz).
3. Operation
•
Warning:
Consult a qualified electrician before using
the instrument if you are at all unsure about its usage.
• Always ensure that the correct function and range is selected.
If in doubt about the correct range, start with the highest and
work downwards.
• When measuring voltage always ensure that the meter
is switched to the correct function range and not set to
the current, resistance or diode test range. Always ensure
that you use the correct test lead socket for the type of
measurement to be made.
• Make sure that the object to be measured is not “live”, i.e.
conducting any current before connecting test leads in series
with it (such as when measuring current).
• Make sure that the test leads are in good condition with no
damage to the insulation.
4. Voltage measurement
Measuring DC voltage
6. Resistance measurement
1. LCD display
2. [ Max Min ]
• Press to switch between max and min measured value.
• Hold in for two seconds to return to normal display.
1. Connect the black test
lead to
and
the red test lead to
.
2. Set the function selector
to
for DC voltage
measurement.
3. If you wish to change
the range manually,
press [ Range ]
several times.
4. Connect the test leads
across the source or
load to be measured.
5. DC and AC Current measurement
1. Connect the black test
lead to
and
the red test lead to
(for 0–600 mA)
or to
(for the range
600 mA – 10 A).
2. Set the function selector
to
,
or .
3. The meter is preset to
measure DC, change
to AC using the blue
button (10).
4. Connect the test leads
in series with the current
source to be measured.
5. When measuring current
between 600 mA and
10 A (without fuse) follow
the method above but
connect the red test lead
to
instead.
1. Connect the black test
lead to
and
the red test lead to
.
2. Set the function selector
to the resistance
measurement .
3. Connect the test leads
across the circuit to
be tested.
7. Hold mode
1. Press the [ Hold/Light ] to save the present reading.
2. The buzzer sounds once and
appears on the display when
Hold is activated.
3. The reading is deleted if you press the button once again.
8. Backlight
Hold in [ Hold/Light ] for two seconds to turn on the backlight.
The light will turn off automatically after 10 seconds.
Measuring AC voltage
1. Connect the black test
lead to
and
the red test lead to
.
2. Set the function selector
to
for AC voltage
measurement.
3. If you wish to change
the range manually,
press [ Range ]
several times.
4. Connect the test leads
across the source or
load to be measured.
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