BK PRECISION 5491A Introduction 电路图.pdf

1 Section 1 Introduction 1-1 Introducing the 50,000 Count Dual Display Multimeter NOTE 1. This operation manual contains information and warning that must be followed to ensure user operation safety and to retain the meter safety condition. Precaution! TO ENSURE PERSONAL SAFETY AND TO AVOID DAMAGING THE METER AND THE EQUIPMENT CONNECTED, READ “GETTING STARTED” IN SECTION 2-2 BEFORE USING THE METER. The meter is 50,000 count Dual Display Multi-meter. The meter is designed for bench-top, field service, and system applications with a high performance/price ratio. Impression With the RS-232 computer interface (standard), the meter is fully programmable for use on the RS-232 interface. RadioFans.CN 收音机爱 好者资料库 2 1-2 Features The main features provided by the meter are: ? 50,000 Count Dual Display ? Vacuum-fluorescent Display (VFD) ? Low Cost and High Performances ? DCV, ACV, DCA, ACA, Frequency, Diode Continuity ? DCV Measurement to 1000V, ACV to 750V (Up 1200Vdc, 1000Vac are measurable) ? AC/DC Current Measurements to 10A (Up to 20A is measurable in less than 20 seconds). ? True RMS (AC, AC+DC), 30Hz to 100kHz Measurement Bandwidth. ? AC Current Measurement Bandwidth from 30Hz to 20kHz. ? Frequency Measurements Up to 500KHz, 0.01 Hz Resolution. ? Resistance Measurement Up to 50 M , 10m Resolutions. ? dBm measurement with variable reference impedance from 2 to 8000. ? Auto or Lock Ranging Relative Calculation. ? Auto or Lock Ranging Dynamic Recording (MIN/MAX) with elapsed time. ? Compare (Hi/Lo/Pass) function for quick in-tolerance test. ? Percentage function transfers the measuring value to proportional percentage (%) display. ? Fast Electronic and Closed-case calibration. ? Data Hold to freeze displayed value. ? Refresh Hold for difficult measuring place. ? External trigger a one-time measurement to get the result as your needs. ? RS 232 Interface. RadioFans.CN 收音机爱 好者资料库 3 1-3 Accessories Standard accessories come with the meter are: ? Power cord ? Operation Manual ? Test leads (Tip-type probe) Available optional accessories are listed as below: ? TL 36 Test leads (Lantern-type probe) ? TL 35 Test leads (Tip-type probe) ? TH 02 Insulation piercing clip ? AK 5491A RS-232 PC Link software and cable ? RK 01 Rack-mount kit (used for single meter) RadioFans.CN 收音机爱 好者资料库 4 1-4 How to use this manual This manual is designed to help the user to get a quick start. Though it is not necessary to read the entire manual to operate the unit effectively, we recommend the manual to be read thoroughly in order to use the meter to its full advantages. First scan the Tables of contents to be familiar with the outline of the manual. Then read “Getting Started” in Section 2-2. Refer to the appropriate section of the manual as needed. The contents of each section are summarized below. Section 1. Introduction Introducing the general information of features, options, accessories, and operation manual for the 50,000 count Dual Display Multi-meter. Section 2. Getting Started Introducing how to prepare the meter for operation and to start taking basic front panel operations and measurements quickly. Section 3. Operating the Meter from the Front Panel Providing a complete description of each operation, which can be performed by using the pushbuttons on the front panel. All related information for operations and functions are grouped together. Section 4. Measurement Application Examples Describing how to use the meter in more advanced and sophisticated operations and applications. Section 5. Calibrating the Meter Describing the basic information to calibrate the meter if necessary. Section 6. RS-232 Remote Operation Describing how to connect the meter to a terminal or a host computer and operate the meter via RS-232 interface. Appendices Appendix A: Specifications Appendix B: Maintenance 5 1-5. SAFETY This meter has been designed and tested according to EN61010-1 (IEC1010-1), Safety Requirements for Electronic Measuring Apparatus. This manual contains information and warns which must be followed to ensure safe operation and retain the meter in safe condition. Use of this instrument in a manner not specified herein may impair the protection provided by the equipment. Some common international electrical symbols used in this manual are shown below Table: Table 1-1. International Electrical Symbols AC - Alternating Current DC - Direct Current AC and DC - Alternating and Direct Current Ground See Explanation In The Manual Before using the meter, read the following safety information carefully. In this manual, WARNING, is reserved for conditions and actions that pose hazard(s) to the user; CAUTION, is reserved for conditions and actions that may damage your meter. WARNING TO AVOID ELECTRICAL SHOCK OR OTHER INJURY: ? Be sure the meter is in good operating condition and avoid working alone. ? Follow all safety procedures for equipment being tested. ? Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity. Damaged leads should be replaced. ? This equipment operates from a power source that does not apply more than 250V rms between the supply conductors or each supply conductor and ground. A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation. ? This equipment is grounded through the grounding conductor of the power cord. To avoid electrical shock, plug the power cord into a properly wired receptacle before connecting to the equipment input or output terminals. 6 ? To avoid explosion, do not operate this product in an explosive atmosphere. ? To avoid personal injury, do not remove the cover or panel. Refer servicing to qualified personnel. ? Select the proper function for your measurement. ? To avoid electrical shock, use caution when working above 60V dc or 30V ac RMS. ? Disconnect the live test lead before disconnecting the common test lead. ? Disconnect the power and discharge high-voltage capacitors before testing in and diode. ? When making a current measurement, turn the circuit power off before connecting the meter in the circuit. ? To avoid fire hazard, always use a specified fuse. ? Use clamp-on probes when measuring circuits exceeding 10 amps. ? When servicing the meter, use only the replacement parts specified. ? Do not allow meter to be used if it is damaged or if its safety is impaired. ? The meter is safety-certified in compliance with EN61010-1 and EN61010-2-31 (IEC1010-1 approximately 5 seconds for 50M range. Maximum Input Protection: 500V dc or ac rms 53 ? Diode Test/Continuity Resolution, Full Scale Reading and Accuracy Range Resolution Full Scale Reading Accuracy 2.3V 100 V 2.3000V 0.05% + 5 Open Circuit Voltage / Test Current: +6.0V dc / 0.5mA approx. Audible Tone: Continuous beep for continuity and single tone for normal forward-biased diode or semiconductor junction Continuity level: Approximately below +50mVdc Maximum Input Protection: 500V dc or ac rms ? Frequency Resolution, Full Scale Reading and Accuracy Range Measuring Range Resolution Full Scale Reading Accuracy (1 year) 500 Hz 5Hz 500Hz 0.01 Hz 510.00 0.01 + 5 5kHz 500Hz5kHz 0.1 Hz 5.1000 0.01 + 3 50kHz 5 KHz50 kHz 1 Hz 51.000 0.01 + 3 500kHz 50kHz500 kHz 10 Hz 999.99 0.01 + 3 Response Time: Approximate 1 second when the displayed reading reaches 99.9% of frequency value. Sensitivity for Voltage Measurement Minimum Sensitivity (RMS Sine-wave) Input Range 5Hz 100kHz 100kHz 500kHz 500 mV 35mV 200mV 5V 0.25V 0.5V 50V 2.5V 5V 500V 25V NO SPEC. 750V 50V NO SPEC. Maximum input V-Hz and Input Impedance, please refer to AC Voltage measurement. Sensitivity for Current Measurement Minimum Sensitivity (RMS Sine-wave) Input Range 30Hz20kHz 500 A 35 A 5mA 0.25mA 50mA 2.5mA 500mA 25mA 5A 0.25A (<2kHz) 10A 2.5A (<2kHz) Maximum input, please refer to AC Current measurement. 54 ? dBm (decibel calculation) Reference Impedance (1) 2 4 8 16 50 75 93 110 124 125 135 150 250 300 500 600 (2) 800 900 1000 1200 8000 (1) Reference impedance is selectable at setup mode or during measurement. Please refer to the chapter for related operation. (2) Default reference impedance Range and Accuracy Accuracy (dB) Voltage Range (1,2) Input Voltage dBm (3) Range 600 Ref 30 to50 Hz 50 to10k Hz 10k to 100k Hz 500mV 5V 50V 500V 25mV 500mV 500mV 5V 5V 50V 50V 500V -29.82 -3.80 -3.80 16.20 16.20 36.20 36.20 56.20 0.3 0.2 0.2 0.2 (5) 0.3 0.2 0.2 0.2 0.7 0.5 0.5 0.5(5) 1000V (dc) 750V (ac) 500V 1000V 500V 750V 56.20 62.22 56.20 59.72 Not Specified 0.2 (4) Not Specified (1) Auto-ranging is used when dBm function is selected (2) In Vdc 1200V range and Vac 1000 V are readable (3) Reading displayed in dB when REL modifier is used (4) For input voltage at frequency between 50Hz to 1kHz (5) Input Voltage 90dB for dc signal Response Time: Same as dc, ac or ac+dc voltage measurements. 55 A-3 General Specifications General Items Specifications Warm up time At least 30 minutes Temperature Coefficient Add 0.15 x (the applicable accuracy)/ C at 0 C to 18 C and 28 C to 50 C Operating Temperature 0 C to 50 C (32 F to 122 F) Storage Temperature -20 C to 60 C Altitude Up to 2000 M Pollution Degree II Over-voltage Category CAT II-600V and CAT I-1000V Relative Humidity Up to 80% (60% for 50M range of resistance measurement) Common Mode Voltage 1000V dc or peak ac rms maximum between any input and earth ground Dimension Approx. 255(w) x 105(h) x 305(d) mm (with holsters) Weight <3.0kgs Line Voltage 100V / 120V / 220V / 240V ac 10%, 50/60Hz, 16VA maximum Interface ? RS-232 (DB-9, male connector) ? Baud rates: 9600, 4800, 2400, 1200, 600, 300 ? Data length: 7 or 8 bits ? Parity: even / odd / none ? Stop bit: 1 or 2 bits ? Echo: on / off ? Print mode: on / off Safety Requirement Designed in compliance with EN61010-1 (IEC1010-1) Installation Category CAT-I 750VAC/1000VDC or CAT-II 600V,Pollution Degree 2 Environment EMC Requirement Designed in compliance with EN61326-1. 56 Appendix B Maintenance B-1 Introduction Appendix C describes the basic maintenance procedures to this Multi-meter. B-2 Cleaning the Meter Before cleaning this meter, make sure the power is switched in OFF position and the power cord is disconnected from the AC outlet. To clean the meter, wipe the dirty parts with gauze or soft cloth soaked with diluted neutral detergent. Do not get too wet to prevent the detergent from penetrating into inside parts and causing damages. After cleaning, leave the instrument until it dries completely. B-3 Configure the Line Voltage Extract the fuse drawer from the AC socket with the aid of a screwdriver to move the fuse holder with the voltage selector from the fuse holder. Pull out the fuse link from the fuse holder with the voltage selector. Replace a new fuse with a rated voltage with specific required line voltage. Select the voltage according to users local line voltage. If the line voltage used is 230V, be sure to switch the line voltage selection to 240V. WARNING! To avoid electrical shock or damaging the meter, never get water inside the case. Caution! Before setting the line voltage selector, the main power should be turned off and remove Power cord from the meter. This meter operates on a 100V, 120V, 220V or 240V AC, 50/60Hz line voltage source. Be sure the line voltage is indicated to your need. 57 B-4 Accessories and Replacement Parts Standard Accessories: Description Power Cord Test Leads (Red and Black) Operation manual Fuse, 1A/250V Fast Blow 6*31mm Optional Accessories: Model Description AK 5491A RS232 cable and PC Link software. TH 02 Insulation piercing clip TL 35 Tip-type Probes (Red and Black) TL 36 Lantern type Probes (Red and Black) RK 01 Rack mount kit for single meters