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Model: 392 and 393
Handheld Digital
Multimeters
USER MANUAL
2
Safety Summary
The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument.
If this device is damaged or something is missing, contact the place of purchase immediately.
This manual contains information and warnings that must be followed to ensure safe operation as well as maintain the meter in a safe condition.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist. To avoid injuries, always disconnect power and discharge circuits before touching them.
DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT
Do not install substitute parts or perform any unauthorized modifications to this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety features are maintained.
3
WARNINGS AND CAUTIONS
WARNING and CAUTION statements, such as the following examples, denote a hazard and appear throughout this manual. Follow all instructions contained in these statements.
A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel.
A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in damage to or destruction of part or all of the product.
WARNING
To avoid potential fire or shock hazard:
•Disconnect all leads, power adapter, and USB cable before opening the battery cover.
•Do not turn on the instrument while the battery cover is removed.
•Use only the included insulated test leads and power adapter supplied with the instrument.
•Observe all markings and ratings on the instrument before connecting to the instrument.
•While making measurements, verify that the performance ratings of instruments and accessories that are used meet the correct safety levels of the instrument.
•Do not insert metal objects into any of the connectors.
•Use the meter only as specified in this manual
•Test the meter on a known voltage before using it to determine if hazardous voltage is present.
•Never ground yourself when taking electrical measurements.
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Compliance Statements
Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems)
This product is subject to
Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE) , and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements.
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CE Declaration of Conformity
The power supply meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnetic Compatibility Directive with the following standards.
Low Voltage Directive
-EN 61010-1
Safety requirements for electrical equipment for measurement, control, and laboratory use-Part 1: General requirements
EMC Directive
-EN 61326-1: 2006
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Safety Symbols
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Electrical Shock hazard. |
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Caution, refer to the operating user manual for |
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warning information to avoid hazard or personal |
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injury and prevent damage to instrument. |
CATI |
Category I overvoltage conditions. |
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Measurement instruments whose measurement |
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inputs are not intended to be connected to the |
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mains supply. The voltages in the environment |
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are typically derived from a limited-energy |
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transformer or a battery. |
CATII |
Category II overvoltage conditions. |
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Measurement instruments whose measurement |
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inputs are meant to be connected to the mains |
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supply at a standard wall outlet or similar sources. |
CATIII |
Category III overvoltage conditions. |
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Measurement instruments whose measurement |
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inputs are meant to be connected to the mains |
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installation of a building. |
CATIV |
Category IV overvoltage conditions. |
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Measurement instruments whose measurement |
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inputs are meant to be connected to the source of |
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power for a given building. |
Environmental Conditions
The instrument may be operated in the following environment.
Operating Environment |
0 |
°C to 40 °C |
Storage Humidity |
0 |
– 85% R.H. |
Storage Environment |
-20 °C to +70 °C |
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Pollution degree |
Pollution degree 2 |
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Measurement Category |
CAT III, CAT IV |
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Table of Contents
Safety Summary .......................................................................... |
3 |
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1 |
General Information............................................................. |
9 |
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1.1 |
Product Overview......................................................... |
9 |
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1.2 |
Package Contents ......................................................... |
9 |
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1.3 |
Front Panel Overview ................................................. |
10 |
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Front Panel Description ................................................... |
11 |
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2 |
Getting Started................................................................... |
13 |
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2.1 |
Using the Digital Multimeter ...................................... |
13 |
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2.2 |
DC and AC Voltage Measurements ............................ |
13 |
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2.3 |
DC and AC Current Measurements ............................ |
14 |
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2.4 |
Make Resistance Measurements ............................... |
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2.5 |
Make Diode Measurements ....................................... |
17 |
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2.6 |
Continuity Test ........................................................... |
17 |
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2.7 |
Make Capacitance Measurements ............................. |
18 |
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2.8 |
Make Temperature Measurements ........................... |
19 |
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2.9 |
Make Frequency Measurements................................ |
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2.10 Percent Duty Cycle Measurements .......................... |
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2.11 |
Auto Power Off......................................................... |
21 |
3 |
PC Communication............................................................. |
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4 |
Specifications ..................................................................... |
22 |
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10 |
Maintenance .................................................................... |
28 |
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Cleaning................................................................................ |
28 |
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BATTERY AND FUSE REPLACEMENT ..................................... |
28 |
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SERVICE INFORMATION ............................................................ |
29 |
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LIMITED THREE-YEAR WARRANTY............................................. |
30 |
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1 General Information
1.1Product Overview
The B&K Precision 392 and 393 handheld digital multimeters provide standard measurement functions, which include AC and DC voltage, AC and DC current, resistance, capacitance, diode, and continuity.
Features:
•60,000 Count display resolution
•DC Voltage measurement up to 1000 V
•AC Voltage measurement up to 750 V
•AC and DC Current up to 20 A
•USB interface for remote communication (model 393)
1.2Package Contents
Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items from the shipping carton, and check for any obvious signs of physical damage that may have occurred during transportation. Report any damage to the shipping agent immediately. Save the original packing carton for possible future reshipment. Every multimeter is shipped with the following contents:
•1 x 392 or 393 Digital Multimeter
•1 x 9 V Battery (inside battery compartment)
•1 x User Manual
•1 x Pair of TL 35A DMM test leads
•1 x USB cable (model 393 only)
•1 x CD utility software (model 393 only)
•1 x Replacement fuse (500 mA)
•1 x K-Type thermocouple
•1 x Certificate of Compliance card
•1 x Accessories pamphlet
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1.3Front Panel Overview
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0 |
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20 |
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60 |
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RANGE |
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REL |
MIN/MAX |
HOLD |
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cal>2s± |
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9 |
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Digital Multimeter |
SHIFT |
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12 |
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+ |
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mV Ω |
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Hz % |
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V |
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(6000 or RS232) |
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mV |
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µ |
+ |
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V |
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C F |
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6 |
5 |
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AUTO POWER OFF |
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CATIII 1000V |
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K-Type |
TRUE RMS AC+DC |
CATIV 600V |
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30V |
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MAX |
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20A |
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MAX 400mA |
COM |
V Ω |
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4 |
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µA mA |
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2 |
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CAT.III |
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3 |
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1 |
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MAX |
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MAX |
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20A/30sec |
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FUSED |
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1000V |
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750V |
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FUSED |
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Figure 1 - Front Panel View
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