Sperry instruments DM-4400A Manuale utente
04/06 Form # 415
OPERATING INSTRUCTIONS
Model DM-4400A
DIGITAL MULTIMETER
PLEASE READ THESE OPERATING INSTRUCTIONS CAREFULY
Misuse and abuse of these instruments cannot be prevented by any
printed word and may cause injury and or equipment damage. Please
follow all these instructions and measurement procedures faithfully and
adhere to all standard industry safety rules and practices.
The Professional’s Choice®
2150 Joshua’s Path, Suite 302
Hauppauge, New York 11788
1-800-645-5398 | 631-231-7050
Fax: 631-434-3128
DM4400 04_06 5/3/06 1:10 PM Page 2
CONTENTS
SECTION TITLE PAGE
Warranty 1
1 Description 2
2 Features 2
3 Specifications 2-4
4 Safety Rules 5-6
5 Front Panel Controls 7
6 Preparation for Use 7
6.1 Unpacking and Contents Check 7
6-2 Pre-Operation Procedure 7-8
7 Battery Replacement 8-9
8 Fuse Replacement 10
9 Operation 11
9.1 Voltage Measurements 11
9.2 Current Measurements 12-13
9.3 Resistance Measurements 13
9.4 Battery Test Measurements 13
9.5 Diode Tests 14
9.6 Non Contact Voltage (NCV) Tests 14
10 Maintenance 15
10.1 Cleaning 15
10.2 Battery Replacement 15
10.3 Fuse Replacement 15
11 Calibration 16-17
11.1 Calibration procedure 17-18
12 Diagrams 19
12.1 Circuit Diagram 19
12.2 Parts List 20-21
13 Return For Repairs 21
DM4400 04_06 5/3/06 1:10 PM Page 3
1
ONE YEAR LIMITED WARRANTY
Sperry Instruments, Inc. warrants that this Sperry instrument has been carefully
tested, inspected and warranted for one (1) year from the date of purchase by the
original end user, provided the instrument has not been misused, damaged due to
negligence, neglect or unauthorized repair, abused or used contrary to the
operating instructions. Instruments and proof of purchase in the form of a legible
copy or original of the sales receipt clearly identifying the distributor, model num-
ber and date of purchase must be returned to Sperry Instruments, Inc. Attention:
Customer Service Center, 2150 Joshua’s Path, Suite 302, Hauppauge, New York
11788, postage prepaid for examination and verification of manufacturing defect
under warranty. Sperry Instruments, Inc., shall be the sole judge of such defect.
The liability of Sperry Instruments, Inc., shall be limited to the repair or replacement
at its sole option of any defective product.
THIS WARRANTY AND THE OBLIGATIONS AND LIABILITIES OF SELLER
THEREUNDER ARE EXCLUSIVWE AND IN LIEU OF AND BUYERS HEREBY
WAIVES ALL OTHER REMEDIES, EXPRESS WARRANTIES, GUARANTEES
OR LIABILITIES OF AND FOR INCIDENTAL OR CONSEQUENTAIL DAMAGES
OR WHETHER OR NOT OCCASIONED BY’S SELLER’S NEGLIGENCE. THIS
WARRANTY SHALL NOT BE EXTENDED, ALTERED OR VARIED EXCEPT BY
A WRITTEN INSTRUMENT SIGNED BY SELLER AND BUYER. SOME STATES
ALLOW LIMITATIONS ON HOW LONG AND IMPLIED WARRANTY LASTS, SO
THE ABOVE LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS,
SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. THIS WARRANTY
GIVES YOU SPECIFIED LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER
RIGHTS WHICH VARY STATE TO STATE.
WARRANTY RETURN
Refer to section "Return for Repairs"for complete instructions. All Warranty
returns must include a legible copy or original of the sales receipt clearly identify-
ing the model number, serial number and date of purchase.
DM4400 04_06 5/3/06 1:10 PM Page 4
Sec. 1 DESCRIPTION
This exceptional 3-1/2 digit handheld, digital multimeter has the capacity of
reading up to 6 functions on up to 18 ranges. This DMM offers a powerhouse
of measurement capability in a small self-contained housing. It is designed for
the professional at work, in the field or in the laboratory. Yet simple enough to
operate, making it perfect for the hobbyist too.
Safety was prime consideration in the design of this DMM. Housed in shock
resistant ABS plastic, this instrument stands up to the use and abuse of every-
day service and electrically insulates the user from potential shock hazards.
Electronic overload protection against accidental application of voltage to
resistance and continuity circuits, combined with its rugged construction make
it a durable and reliable instrument.
Sec. 2 FEATURES
• Pocket-size
• Simple Operation
• 1000 hour battery life
• 10A DC/AC Range
• Recessed safety designed input terminals
• Built-in tilt stand
• Overload protection on all ranges
• Diode test function
• Non contact Voltage detection
Sec. 3 SPECIFICATIONS
Display: 3-1/2 digit LCD, 0.5" numerals, maximum reading
1999 with automatic sign and " " annunciators.
Overrange
Indication: "1" most significant digit blinks.
Sampling Rate: 3 times per second.
Operating
Environment: 5°C to 40°C (32°F to 104°F)
Relative humidity: 80% for temperatures up to 31 degrees C
Decreasing linearly to 50% relative humidity
at 40 degrees C.
2
DM4400 04_06 5/3/06 1:10 PM Page 5
Storage
Environment: -20° C to 60° C (-4 F to 140° F) at 80% relative
humidity.
Power Source: One (1) 9V Transistor Type Battery.
(NEDA #1604).
Power
Consumption: 30mW typical
Battery Life: 1000 hours typical with zinc carbon.
Battery Indicator: " " symbol appears in display to indicate
low battery voltage.
Fuse: AWS Part F-17; 0.5A, 250V, 5 x 20mm fast acting.
Dimensions: 5.0"H x 2.8"W x 1.4"D
(128H x 72W x 36Dmm).
Weight: Approximately 7.0 oz. (200g) including battery.
RANGES:
DC Voltage
3
Range Resolution Accuracy (18°C to 28°C) Input Impedance
200mV 100µV ±(2.0% of rdg + 4d) 10MΩ
2V 1mV ±(0.5% of rdg + 4d) "
20V 10mV " "
200V 100mV " "
600V 1V " "
Normal Mode Rejection Ratio: Greater than 46dB at 50 Hz 60Hz
(1K unbalance).
Overload Protection: 600VDC or AC rms for 1 minute.
AC Voltage (Average Responding, Calibrated in RMS of Sine Wave)
Range Resolution Accuracy (18°C to 28°C) Input Impedance
(50Hz-500Hz)
2V 1mV ±(1.0% of rdg + 4d) 10MΩ
20V 10mV " "
200V 100mV " "
600V 1V " "
Response: Average responding calibrated in RMS of a sine wave.
Overload Protection: 600VAC for 1 minute.
DM4400 04_06 5/3/06 1:10 PM Page 6
DC Current
Overload Protection: 0.5A/250V fuse on mA inputs
10A for 60 seconds on 10A input (unfused)
Resistance
Overload Protection: 250VDC or peak AC – Electronic (No fuse blow).
4
Range Resolution Accuracy (18°C to 28°C) Full Scale
Burden Voltage
2mA 1µA ±(1.0% of rdg + 4d) 0.25V
200mA 100µA " "
10A 10mA ±(3.0% of rdg + 1d) 1.2V
AC Current
(50Hz-500Hz)
Overload Protection: 0.5A/250V fuse on mA inputs
10A for 60 seconds on 10A input (unfused)
Range Resolution Accuracy (18°C to 28°C) Full Scale
Burden Voltage
2mA 1µA ±(1.0% of rdg + 4d) 0.25V
200mA 100µA " "
10A 10mA ±(3.0% of rdg + 1d) 1.2V
Range Resolution Accuracy (18°C to 28°C) Open Circuit
Voltage
200 10mΩ ±(1.2% of rdg + 4d) 0.45V
2K 1Ω ±(1.2% of rdg + 1d) "
20K 10Ω " "
200K 100Ω " "
2000K 1KΩ " "
20M 10KΩ ±(3.0% of rdg + 5d) "
Diode Check
Overload Protection: 250VDC or peak AC – Electronic (No fuse blow).
Range Test Current Open Circuit Volts
DCV 2V 0.3mA appox. 1.5Vdc
Continuity
Overload Protection: 250VDC or peak AC - Electronic ( No fuse blow).
Range Resolution Audible Indication Open Circuit Volts
2KΩ 1Ω <1KΩ 0.45V
DM4400 04_06 5/3/06 1:10 PM Page 7
5
Non Contact Voltage (NCV Test)
Range Frequency Dielectric Strength
100-600VAC 50/60Hz 2000V, 1 minute, 100uA or less during
max to ground dielectric strength test
Sec. 4 SAFETY RULES
1. Read these operating instructions thoroughly and completely before oper-
ating your DMM. Pay particular attention to WARNINGS and CAUTIONS,
which will inform you of potentially dangerous procedures. These instruc-
tions must be followed.
2. Always inspect your DMM, test leads and accessories for any sign of
damage or abnormality before every use. If any abnormal conditions exist
(e.g. broken test leads, cracked cases, display not reading, etc.), do not
attempt to take any measurements. Refer to section 14 Return for Repair.
3. Never ground yourself when taking electrical measurements. Do not
touch exposed metal pipes, outlets, fixtures, etc., which might be at
ground potential. Keep your body isolated from ground by using dry cloth-
ing, rubber shoes, rubber mats or any approved insulating material.
4. Never touch exposed wiring, connections or any live circuit conductors
when attempting to take measurements.
5. Never replace the protective fuse inside the DMM with any other than the
Sperry Part number specified or approved equal.
6. Remember: Think Safety and Act Safely.
7. When testing for the presence of voltage, make sure the voltage function
is operating properly by reading a known voltage in that range before
assuming that a zero reading indicates a no-voltage condition.
8. Calibration and repair should be performed by qualified maintenance per-
sonnel only.
9. Do not attempt calibration or service unless another person, capable of
rendering first aid and resuscitation is present.
10. Do not install substitute parts or perform any unauthorized modification of
the instrument. Return the instrument to Sperry Instruments for service
and repair to insure that safety features are maintained.
11. To avoid electric shock use CAUTION when working with voltages above
40Vdc or 20Vac. Such voltages pose a shock hazard.
12. Do not operate this instrument in an explosive atmosphere (i.e. in the
presence of flammable gases or fumes, vapor or dust).
13. For indoor use only.
14. Altitude up to 2000 meters.
15. This equipment has been evaluated to INSTALLATION CATEGORY II.
Pollution Degree 2, and according to EN61010-1.
DM4400 04_06 5/3/06 1:10 PM Page 8
NCV Sensor End
6
Fig. 1
Non Contact
Voltage
Function
Digital
Display
Input
Terminals
Range
Selector
Switch
DM4400 04_06 5/3/06 1:10 PM Page 9
Sec. 5 FRONT PANEL CONTROLS
(See Fig. 1)
1. Digital Display: 3-1/2 digit LCD, 0.5" numerals, maximum reading 1999 with
automatic sign and " " annuciators. 3-1/2 digit LCD with Automatic func-
tion and range annunciators including the following: " “ "-".
2. Range Selector Rotary Switch: Rotating this switch will turn the DMM on or
off as well as change the function. For the available functions your DMM
has refer to section 3 (Specifications).
3. Input Terminals: These terminals should be used in conjunction with the
position of the function switch.
Sec. 6 PREPARATION FOR USE
Sec. 6.1 UNPACKING AND CONTENTS CHECK
The DM-4400A comes complete and ready to use. Check the
following contents list when unpacking. If any pieces are missing
notify the distributor you purchased the instrument from or
Sperry Instrument, Inc.
• Operating Instructions # 415
• Test Leads TL-54 (one black, one red).
• 9V Transistor type Battery See Battery
replacement section 10.2 for proper installation.
• One Fuse installed, one spare Fuse Part # F-17; 0.5A,
250V, 5mm X 20 mm, fast acting (See Fuse Replacement
section 10.3)
Sec. 6.2 PRE-OPERATION PROCEDURE
1. Install the 9V transistor type battery See Battery
Replacement procedure in section 10.2.
2. Inspect the instrument for any external defects by comparing
with the diagram on page 6. If any abnormal conditions exist, do
not attempt to take any measurements. Refer to sections 10
(maintenance) and 14 (Return for Repairs).
7
DM4400 04_06 5/3/06 1:10 PM Page 10
8
3. Insert the test leads into the "COM" and "V-Ω" jacks.
Connect the two ends of the test leads together.
4. Place the range selector switch into the off position.
Nothing will appear on the display. Replace the range selector
switch into the following ranges shown in the chart below.
Check for the appropriate meter response.
Range Display Readings
DC NO
AC NO
Ω 10.00 “1” flashing
DIODE 1.500 Approx.
5. As you can see, the decimal point moves as the ranges are
changed. The maximum display reading is 1999. The 200DCV
range will actually only read 199.9Vdc. We call this the 200DCV
range for convenience only.
6. You can now check the decimal point on each range by
referring to sec. 3 Specifications where the ranges are all listed.
Refer to the Range and Resolution columns to compute the
decimal point location.
7. If any abnormal conditions exist, do not attempt to take any
electrical measurements. Instead refer to sec. 14 Return for
Repairs.
Sec. 7 BATTERY REPLACEMENT
The DM-4400A has a self-contained power supply consisting of One 9V
Transistor Type Battery (NEDA #1604).
8
DM4400 04_06 5/3/06 1:10 PM Page 11
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