Veto DT-18 User manual

User's Guide
Digital Mini Multimeters

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User's Guide of Digital Mini Multimeters DT-16/DT-18
CONTENTS
1 Summary.....................................................................................04
2 Guidelines of safety operation....................................................04
3 Integrated indicators...................................................................06
4 Safety signs................................................................................07
5 Meter Layout...............................................................................07
5.1 DT-18....................................................................................07
5.2 DT-16....................................................................................08
6 Key functions and auto power off...............................................09
6.1 SELECT Button....................................................................09
6.2 RELATIVE Button.................................................................09
6.3 DATA HOLD Button..............................................................09
6.4 Hz/Duty measurement..........................................................09
6.5 RANGE Button.....................................................................10
6.6 MAXH Button.......................................................................10
6.7 Auto power off......................................................................10
7 Operating instructions.................................................................11
7.1 DCV measurement...............................................................11
7.2 ACV measurement...............................................................12
7.3 Resistance measurement....................................................12
7.4 Hz and Duty measurement (Figure 4 the dashed box
shown is limited to DT18).....................................................13

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User's Guide of Digital Mini Multimeters DT-16/DT-18
7.5 Diode and Buzzer on-off measurement................................14
7.6 Capacitance measurement (Figure 4 the dashed box
shown is limited to DT18).....................................................15
8 Technical Specications..............................................................15
9 Battery replacement....................................................................19

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User's Guide of Digital Mini Multimeters DT-16/DT-18
1 SUMMARY
DT-16/DT-18 is a portable notebook autoranging digital multimeter
(DT-16 is 3 1/2 and DT-18 is 3 3/4). It is a full - featured, stable
performance, high precision, low power consumption and novel
structure, safe and reliable multimeter, and it can be used to
measure AC/DC voltage, frequency, duty cycle, resistance, ca
pacitance, diode forward voltage drop and on-off test. It is an
ideal measuring instrument for the majority of users. (the DT-
16 can be not used for measuring the frequency, duty cycle, and
capacitance).
This operating instruction includes relative safety and warning
information. Please read carefully and comply with all warnings and
precautions.
2 GUIDELINES OF SAFETY OPERATION
Please note that the warning label and warning notices.
A CAUTION indicates a hazard to the user, or action that may
damage the instrument ordevice under test.
The instrument follows the GB4793 safety requirements of
electronic measuring instrument strictly and designs and produces
following the IEC61010-1 safety standards. And it is accordance
with the safety standards of double insulation voltage standard
CATII 300V and Pollution Degree II. The protection provided by the
instrument will be weaken or lose if it is not operated in accordance
with the instructions.
1. Please check the insulation layer of the probe before use in case
of any damage or abnormal phenomena. Please doesn’t use
if there is any unusDTl phenomenon, such as probe bare, the
insulation layer damaged, cabinet rupture, LCD monitor doesn’t

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User's Guide of Digital Mini Multimeters DT-16/DT-18
display.
2. When using the probe, your nger must be placed after the probe
nger gDTrd ring.
3. Do not apply voltage more than 500V between the meter terminal
and ground to prevent electrical shock and damage to the meter.
4. Please be sure of carefully when measuring the DCV (higher
than 60V) or ACV (higher than 42Vrms). Please keep in mind
that the gures can’t exceed the protection position in the probe
in case of electric shock.
5. It is prohibited to use the instrument without back cover or the
back cover is damaged, otherwise electric shock will happen.
6. In order to prevent electric shock and damage to the instrument,
the measured signals should not exceed the prescribed limits.
7. Please place the function switch in the correct range stalls when
measuring. Please cut the connection of the probe and the circuit
under test prior to conversion of the rotary switch. In order to
prevent the meter, it is strictly prohibited to convert stalls during
the measurement.
8. Please don’t change the internal wires of the instrument in case
to damage the instrument and endanger the safety.
9. Please replace the battery in time to ensure the measurement
accuracy when the “ ” shows on the LCD display.
10. Don’t keep or use the instrument under the high temperature,
high humidity, and flammable, explosive and strong
electromagnetic eld environment.
11. Please use a damp cloth and mild cleaning detergent to
maintain instrument case, do not use abrasives.

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User's Guide of Digital Mini Multimeters DT-16/DT-18
3 INTEGRATED INDICATORS
1. The maximum voltage of the voltage input terminal and the
ground: 500Vrms or 500DCV
2. Range: Automatic
3. Measurement rate: 3 times/second
4. The maximum display: 3999, 3 3/4 ( DT16 is 1999, 3 1/2)
5. Over-range indication: “OL”
6. Polarity: Negative polarity “ - ”
7. Low battery voltage Tip: “ ”
8. Battery inside: 3V Button-type lithium manganese battery, Type:
CR2032
9. Operating temperature: 0°C~40°C (32°F~104°F), Humidity ≤75%
Storage temperature: -10°C~50°C (14°F~122°F)
10. The Dimensions: 107mm×56mm×12mm
11. Net. Weight: 55g (include probe and battery)
12. Auto power off
When the instrument knob and function keys were no action in
about 30 minutes, the meter enters dormancy status; In sleep
mode, toggle the knob or press the panel button, the instrument will
automatically boot ( into the working mode). But for DT18, if waking
the instrument by pressing SELECT button, the automatically shut
down function of the instrument will be cancelled. For DT16, if
waking it by pressing HOLD button, the automatically shut down
function will be cancelled.

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User's Guide of Digital Mini Multimeters DT-16/DT-18
4 SAFETY SIGNS
Power insufcient Ground Warning
AC DC Capacitance
Double insulation Buzzer pass-off Diode
AC or DC
License of China Technical Supervision measuring equipment
manufacturing
Accordance with European Union standard
5 METER LAYOUT
5.1 DT-18
1. LCD display window
2. Resistance, Capacitance, Diode and Continuity Buzzer function
selection button (SELECT)

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User's Guide of Digital Mini Multimeters DT-16/DT-18
3. Relative value measurement (RELATIVE)
4. Data keeping switch HOLD (DATA HOLD)
5. Hz/DUTV measurement ( DCV and ACV FILE)
6. Function switch
7. Measurement positive input terminal (red probe)
8. Measurement positive input terminal (black probe)
5.2 DT-16
1. LCD display window
2. Resistance, Diode and Continuity Buzzer function selection
button (SELECT)
3. Automatic/ManDTl switching (RANGE)
4. Data keeping switch HOLD (HOLD)
5. Maximum keeping switch (MAXH)
6. Function switch

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User's Guide of Digital Mini Multimeters DT-16/DT-18
7. Measurement positive input terminal (red probe)
8. Measurement positive input terminal (black probe)
6 KEY FUNCTIONS AND AUTO POWER OFF
6.1 SELECT Button
The key is the resistance and capacitance measurement, buzz off
and diode test function switching key, accompanied by beep sound
when the switch prompt. (For DT16, is no capacitor switching).
In sleeping mode, press this key to wake the meter and the
automatically power-off function will be cancelled. (Only for DT-18).
6.2 RELATIVE Button
When press this button, the meter will display the current value
as a reference value, after that, the readings of measurement will
automatically subtracting this reference value. Press this button
again; the meter will exit the relative value measurement into
the normal measurement state; frequency / duty cycle measurement
has no the relative value function.
6.3 DATA HOLD Button
Press this button and the display value is locked and remained.
Press this button again, the locked state is released, and the meter
enters the normal measuring mode. For DT16, in sleeping mode,
press this button to wake the instrument and the automatically
power-off function will be cancelled.
6.4 Hz/Duty measurement
In the ACV/DCV file, press this button and convert into Hz/Duty
measurement (Press Hz/Duty button back and forth to measure the
frequency or duty cycle); After measuring the Hz/DUTY return
the DCV or ACV, the measurement range of the instrument is

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User's Guide of Digital Mini Multimeters DT-16/DT-18
DCV-400mV or ACV-4V, and the "AUTO" characters on the LCD
disappears. If measuring the higher voltage at this point, please
toggle function rotary switch or shut down the instrument, and re-
set the DCV/ACV as automatic range and test.
6.5 RANGE Button
Boot by default auto range, press the button to switch to
manDTl range. Under manDTl range, jump up a le when press this
button one time. When jumping to the most upscale and continuing
to press this button, the button will go to the low-grade, and followed
by this cycle. If press this button over 2 seconds, and the switch will
go back to the automatic range state.
6.6 MAXH Button
The A/D conversion will continue to work if press this button, and
the display value will always update and remain the maximum
value.
6.7 Auto power off
For DT-16, during the measurement, the instrument will be in
“Automatic Shutdown” (hibernation) to conserve power, if the
function keys and dial switch have no action within 15 minutes. And
press HOLD button to switch on the instrument then the auto power
off function will be cancelled. Under auto power off state, press
function keys or turn the dial switch, and the instrument will switch
on automatically.
Cautions: Under the sleeping mode, press the HOLD button
to wake the instrument, and the auto power off function will be
cancelled.
For DT-18, during the measurement, the instrument will be in
“Automatic Shutdown” (hibernation) to conserve power, if the
function keys and dial switch have no action within 30 minutes. And
press SELECT button to switch on the instrument then the auto