CN102445677A - DCS current input clamping piece calibration device for supplying 24V direct current - Google Patents
DCS current input clamping piece calibration device for supplying 24V direct current Download PDFInfo
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- CN102445677A CN102445677A CN2010105009057A CN201010500905A CN102445677A CN 102445677 A CN102445677 A CN 102445677A CN 2010105009057 A CN2010105009057 A CN 2010105009057A CN 201010500905 A CN201010500905 A CN 201010500905A CN 102445677 A CN102445677 A CN 102445677A
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Abstract
The invention discloses a DCS current input clamping piece calibration device for supplying 24V direct current, which is characterized in that the device comprises a fuse, a milliampere current meter, a diode, an adjustable resistor, a switch, a gears resistor and a current-limiting resistor, wherein the fuse, the milliampere current meter, the diode, the adjustable resistor, the switch and the gears resistance are sequentially connected end to end; a cathode of the diode is connected with an anode power input end of the milliampere current meter, and an anode of the diode is connected with the adjustable resistor; and one end of the current-limiting resistor is connected with the switch, and the other end of the current-limiting resistor is connected into the tail part of the gears resistor. The DCS current input clamping piece calibration device has the advantages of low manufacturing cost, small size, light weight, simplicity in operation, convenience and quickness in use, and high efficiency. Through experiment validated, the device can realize 3 percent of calibration accuracy.
Description
(1) technical field
The present invention relates to a kind of calibration equipment, especially a kind of can be applicable to have supply the galvanic DCS electric current input of 24V fastener calibration equipment.
(2) background technology
Be to guarantee the accuracy of measuring equipment,, carry out verification and be absolutely necessary before use with in the use for having the galvanic DCS electric current input of the 24V of confession fastener.In addition, when this electric current input fastener and transmitter constitute the loop, indication usually takes place can't judge but that unusually it still is the transmitter fault that this electric current input fastener breaks down, so the verification of this electric current input fastener is just more become key.The most complex structure of existing calibration equipment, cost an arm and a leg, during verification, need a resistance box and a tester combination to use, instrument carries and uses all inconveniently, and verification and handling failure time are long and need a plurality of personnel work inefficiency.
(3) summary of the invention
The object of the invention is exactly that a kind of galvanic DCS electric current input of the 24V of confession fastener calibration equipment that has is provided in order to overcome the problems referred to above.Device volume is little, and is easy to use, quick.
The object of the invention is realized by following technical scheme: this calibration equipment comprises fuse, milliampere reometer, diode, adjustable resistance, switch, gear resistance and the current-limiting resistance in the housing; Fuse, milliampere reometer, diode, adjustable resistance, switch and gear resistance are linked in sequence from beginning to end; The negative electrode of diode is connected with the cathode power supply input end of milliampere reometer; Its anode is connected with adjustable resistance; To guarantee that the electric current that flows through milliampere reometer is always forward current, avoid in checking procedure, taking place the damage that milliampere reometer oppositely causes.One end of current-limiting resistance connects switch, and its other end inserts the afterbody of gear resistance, and when the resistance of adjustable resistance during at 0K Ω, current-limiting resistance has the effect that prevents to damage because of electric current in the loop is excessive the milliampere reometer.Gear resistance is made up of a plurality of resistance, and each resistance is all corresponding one by one with current signal.Generally,, only five current signals need be chosen,, the verification of fastener can be accomplished fast switch connection gear resistance to the verification of electric current input fastener; When the current signal of the more gears of needs carries out verification, can select for use adjustable resistance to carry out verification.
Advantage of the present invention is that the cost of manufacture of calibration equipment is low, and volume is little, and is in light weight, simple to operate.As long as a people just can accomplish, high efficiency detects a point and only needs 1～2 minute, when especially a new DCS hundreds of electric current input fastener being carried out verification, more demonstrates the high in efficiency and convenience of this calibration equipment.Can reach 3% checking precision through this device of a large amount of experimental verifications.
But DCS electric currents such as this calibration equipment verification JX-300XP XP313 of system fastener, verification I/A ' the s FBM201 of system fastener input fastener also can be used for verification and supplies the galvanic instrument and meter for automation like models such as DT20 of 24V.
(4) description of drawings
Fig. 1 electrical block diagram of the present invention;
Among the figure: the 1-fuse; 2-milliampere reometer; The 3-diode; The 4-adjustable resistance; The 5-switch; 6-gear resistance; The 7-current-limiting resistance; 8-verification object negative pole incoming end; The anodal incoming end of 9-verification object; The 10-housing.
(5) embodiment
As shown in Figure 1; Fuse 1 in the housing 10, milliampere reometer 2, diode 3, adjustable resistance 4, switch 5 and gear resistance 6 head and the tail are linked in sequence; The negative electrode of diode 3 is connected with the cathode power supply input end of milliampere reometer 2; Its anode is connected with adjustable resistance 4, and an end of current-limiting resistance 7 connects switch 5, and its other end inserts the afterbody of gear resistance 6.Gear resistance 6 is made up of a plurality of resistances, and Fig. 1 shows that gear resistance 6 is made up of five resistance, and each resistance all has a current corresponding signal.Current signal is by milliampere reometer 2 indication readings.
During use, earlier transducer signal in the loop is broken off, anodal incoming end 9 of verification object and verification object negative pole incoming end 8 are connected to the signal input part of the electric current input fastener passage that needs verification.Generally, the verification of electric current input fastener, only need choose five current signals carries out verification.Rotary switc 5 is connected gear resistance 6, chooses a gear resistance, and this moment, the adjustable resistance resistance was zero; Whether the current signal of watching milliampere reometer 2 is at checkpoint; If the current signal of milliampere reometer 2 not at checkpoint, then regulate adjustable resistance 4 by way of compensation resistance revise, when the reading of milliampere reometer 2 is checkpoint; Read the measurement displayed value of Distributed Control System (DCS) microcomputer; The difference that calculates measured value and actual value can judge that by the verification fastener step can be accomplished the verification of fastener fast with the above when other four points were carried out verification whether in error range.
Claims (1)
1. one kind supplies the galvanic DCS electric current input of 24V fastener calibration equipment; It is characterized in that it comprises fuse (1), milliampere reometer (2), diode (3), adjustable resistance (4), switch (5), gear resistance (6) and current-limiting resistance (7) in the housing (10); Fuse (1), milliampere reometer (2), diode (3), adjustable resistance (4), switch (5) and gear resistance (6) head and the tail are linked in sequence; The negative electrode of diode (3) is connected with milliampere cathode power supply input end of reometer (2); Its anode is connected with adjustable resistance (4), and an end of current-limiting resistance (7) connects switch (5), and its other end inserts the afterbody of gear resistance (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105009057A CN102445677A (en) | 2010-09-30 | 2010-09-30 | DCS current input clamping piece calibration device for supplying 24V direct current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105009057A CN102445677A (en) | 2010-09-30 | 2010-09-30 | DCS current input clamping piece calibration device for supplying 24V direct current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102445677A true CN102445677A (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105009057A Pending CN102445677A (en) | 2010-09-30 | 2010-09-30 | DCS current input clamping piece calibration device for supplying 24V direct current |
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| CN (1) | CN102445677A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111176254A (en) * | 2019-12-23 | 2020-05-19 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Multifunctional signal generating and detecting device |
-
2010
- 2010-09-30 CN CN2010105009057A patent/CN102445677A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111176254A (en) * | 2019-12-23 | 2020-05-19 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Multifunctional signal generating and detecting device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |