Digi-Sense 20250-64 Manuel utilisateur
User Manual
THE STANDARD IN PRECISION MEASUREMENT
Heavy-Duty Autoranging
Digital Multimeter
with Bluetooth®Mobile App and
NIST-Traceable Calibration
Model 20250-64
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Introduction
The Digi-Sense Heavy-Duty Autoranging Digital Multimeter
with Bluetooth® Connectivity (model 20250-64) allows you to
transmit data directly to your Android™or iOS®device using our
free D/S Meter app. Now you can view data at a safe distance
from potentially hazardous parameters or even use your smart
device as a real-time secondary display for checking measure-
ments, eliminating the need to write down readings on paper. The
results are automatically stored in the app with a date-and-time
stamp and can be saved as a CSV file and emailed for future
reference, manipulation, or analysis to help determine trends and
conditions over a long period of time. You can also use the app to
attach photos and notes to the records creating a clear reference
point for your work—ideal for record keeping at large sites.
Setup is simple. Download the free D/S Meter app to your Android
or iOS device. Place the multimeter in Bluetooth mode and open the
app on your smart device. The meter will be sensed by your device
and be listed as an available source that you can select. Once
selected, the data sensed by the meter is displayed on your device
and some of the instrument functions can be accessed. A full
description of its operation is available for download in the app.
The Heavy-Duty Digital Autoranging Multimeter measures
AC/DC voltage, AC/DC current, resistance, frequency (electrical &
electronic), capacitance, diode test, and continuity. The meter also
offers True RMS for more accurate current readings, temperature
measurement with a type K thermocouple, and analog bar graph for
viewing trends. Rugged IP67-rated waterproof design withstands
heavy-duty use. This instrument is fully tested and calibrated to
NIST-traceable standards for reliable measurements right out of the
box, saving you time and money. Proper use and care will provide
many years of reliable service.
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Safety
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates
the user must refer to the manual for more information.
This WARNING symbol indicates a potentially hazardous
situation, which if not avoided, could result in death or
serious injury.
CAUTION symbol indicates a potentially hazardous situa-
tion, which if not avoided, may result in product damage.
This symbol advises the user that the terminal(s) so
marked must not be connected to a circuit point at which
the voltage with respect to earth ground exceeds (in this
case)1000VAC or 1000VDC.
This symbol adjacent to one or more terminals identifies
them as being associated with ranges that may, in normal
use, be subjected to particularly hazardous voltages. For
maximum safety, the meter and its test leads should not
be handled when these terminals are energized.
This symbol indicates that a device is protected through-
out by double insulation or reinforced insulation.
MAX
WARNING
CAUTION
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Safety Instructions
This meter has been designed for safe use but must be operated
with caution. The rules listed below must be carefully followed
for safe operation.
1. NEVER apply voltage or current to the meter that exceeds the
specified maximum:
2. USE EXTREME CAUTION when working with high voltages.
3. DO NOT measure voltage if the voltage on the “COM” input
jack exceeds 1000V above earth ground.
4. NEVER connect the meter leads across a voltage source while
the function switch is in the current, resistance, CAP, or diode
mode. Doing so can damage the meter.
5. ALWAYS discharge filter capacitors in power supplies and
disconnect the power when making resistance or diode tests.
6. ALWAYS turn off the power and disconnect the test leads
before opening the covers to replace the fuse or batteries.
7. NEVER operate the meter unless the back cover and the battery
and fuse covers are in place and fastened securely.
8. If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may
be impaired.
Input Protection Limits
Function Maximum Input
V DC or V AC 1000 VDC/1000 VAC RMS
mA AC/DC 500 mA 1000 V fast acting fuse
A AC/DC 10 A 1000 V fast-acting fuse (10A for 30 seconds
max every 15 minutes)
Frequency, Resistance,
CAP, Diode Test, Continuity,
Temperature, Duty Cycle 250 VDC/AC RMS
Surge Protection: 8 kV peak per IEC 61010
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Unpacking
Check individual parts against the list of items below.
If anything is missing or damaged, please contact your
instrument supplier immediately.
1. Meter
2. Test leads
3. One type K temperature probe
4. One 9 V battery
5. Carrying case
6. User manual
7. NIST-traceable calibration report with data
Key Features
• Bluetooth interface
• User-friendly mobile app
• 4000 display count
• True RMS readings
• Electronic overload protection
• Autoranging with auto power-off
• Data Hold function
• Rugged IP67-rated double-molded housing
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Meter Description
1. 4000 counts LCD
2. MAX/MIN button
3. RANGE button
4. MODE button
5. Rotary function switch
6. mA, µA and 10 A
input jacks
7. COM input jack
8. Positive input jack
9. Hz and % button
10. HOLD and Backlight button
11. RELATIVE and Bluetooth button
Note: Tilt stand and battery compartment are on rear of unit.
1
3
4
2
5
6
9
10
11
8
7
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Symbols and Annunciators
Auto power-off
•)))Continuity
Diode test
Battery status
µmicro (10–6)
mmilli (10–3)
A Amps
kkilo (103)
Mmega (106)
ΩOhms
Hz Hertz (frequency)
V Volts
% Percent (duty ratio)
REL Relative
AC Alternating current
AUTO Autoranging
DC Direct current
HOLD Display hold
MAX Maximum
MIN Minimum
hFE Reserved
Bluetooth
°F Degrees Fahrenheit
°C Degrees Centigrade
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Setup and Operation
WARNING: Risk of electrocution. High-voltage circuits, both
AC and DC, are very dangerous and should be measured
with great care.
1. ALWAYS turn the rotary function switch to the OFF position
when the meter is not in use.
2. If “OL” appears in the display during a measurement, the
value exceeds the range you have selected. Change to a
higher range.
DC Voltage Measurements
CAUTION: Do not measure DC voltages if a motor on the circuit
is being switched ON or OFF. Large voltage surges may occur
that can damage the meter.
1. Set the rotary function switch to the green VDC position.
2. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive Vjack.
3. Touch the black test probe tip to the negative side of the
circuit and touch the red test probe tip to the positive side
of the circuit.
4. Read the voltage in the display.
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AC Voltage (Frequency, Duty Cycle) Measurements
WARNING: Risk of Electrocution. The probe tips may not be
long enough to contact the live par ts inside some 240V outlets
for appliances because the contacts are recessed deep in the
outlets. As a result, the reading may show 0 volts when the
outlet actually has voltage on it. Make sure the probe tips are
touching the metal contacts inside the outlet before assuming
that no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the
circuit is being switched ON or OFF. Large voltage surges may
occur that can damage the meter.
1. Set the rotary function switch to the green VAC/Hz/% position.
2. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive Vjack.
3. Touch the black test probe tip to the neutral side of the
circuit and touch the red test probe tip to the “hot” side
of the circuit.
4. Read the voltage in the display.
5. Press the Hz/% button to indicate “Hz”.
6. Read the frequency in the display.
7. Press the Hz/% button again to indicate “%”.
8. Read the percent of duty cycle in the display.
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DC Current Measurements
CAUTION: Do not make 10 A current measurements for longer
than 30 seconds. Exceeding 30 seconds may cause damage to
the meter and/or the test.
1. Insert the black test lead banana plug into the negative
COM jack.
2. For current measurements up to 4000 µA DC, set the rotary
function switch to the yellow µAposition and insert the red
test lead banana plug into the µA/mA jack.
3. For current measurements up to 400 mA DC, set the rotary
function switch to the yellow mA position and insert the red
test lead banana plug into the µA/mA jack.
4. For current measurements up to 10 A DC, set the rotary
function switch to the yellow 10A/Hz/% position and insert
the red test lead banana plug into the 10A jack.
5. Press MODE button to indicate “DC” on the display.
6. Remove power from the circuit under test, then open up the
circuit at the point where you wish to measure current.
7. Touch the black test probe tip to the negative side of the circuit
and touch the red test probe tip to the positive side of the circuit.
8. Apply power to the circuit.
9. Read the current in the display.
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