Non-corrosive gas Liquid. Corrosive gas
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1 997 PRESSURE SENSRS INFRMATIN INTRDUCTIN Principle of operation A sensor converts changes in of a gas or a liquid into an electrical signal by means of a sensing device, and generates an analog output proportional to the or a switching output which operates at a particular level. All SUNX sensors incorporate semiconductor transducers, which offer long life and high reliability, as the sensing devices. Structure of electronic sensor For non-corrosive gases The diffused semiconductor transducer converts into an electrical signal, which is then processed by an amplifi er and an output circuit. to voltage conversion Diffused semiconductor transducer For other gases and liquids The is applied to a stainless diaphragm, whose distortion is converted by a bonding type semiconductor transducer, bonded at the back of the diaphragm, into an electrical signal. This signal is then processed by an amplifi er and an output circuit. Amplifier + circuit Non-corrosive gas Liquid Corrosive gas to voltage conversion Amplifier + circuit DC power supply DC power supply Stainless diaphragm Bonding type semiconductor transducer FEATURES Proximity Features of electronic sensor sensors can be broadly classifi ed into two types: electronic type and mechanical type. Previously, mechanical type sensors, which are relatively inexpensive, were commonly used. However, since they have low reliability and short life, electronic sensors are now being increasingly used. Electronic type (Diffusion type, bonding type) Mechanical type (Bourdon-tube, bellows, etc.) Principle Direct conversion from to an electrical signal, providing a non-contact switching output. is changed to displacement, which in turn operates (N / FF) a mechanical switch to provide a contact type switching output. Advantage Disadvantage High accuracy High reliability and long life because of no mechanical parts Quick response Expensive than mechanical type Inexpensive No power supply needed Short lifetime Poor response
2 PRESSURE SENSRS 998 TYPES F SENSRS Method of classification Classification by applicable fluid The fl uid whose is measured could be a gas, water, oil, etc. The transducer which can be used depends on the fl uid. Take care that if the sensor is used with a fl uid other than that specifi ed, there is a danger of the diaphragm getting corroded and damaged. sensor For non-corrosive gases (diffused semiconductor transducer) For other gases and liquids which do not corrode stainless steel SUS 302 and SUS 304 (Stainless diaphragm) 2 Classification by type of Classifi cation is based on the reference with respect to which the is measured. sensor Gauge Differential 3 Classification by port The required port differs with the piping done. If the required shape or size of the port differs, it is necessary to use attachments. sensor Classification Rc (PT) /8 female M5 female 0-32 UNF female NPT /8 female NPTF /8 female G (PF) /8 female R (PT) /8 male R (PT) /4 male M5 male 0-32 UNF male NPT /8 male NPT /4 male G (PF) /8 male ø4.8 mm ø0.89 in pipe Classification by applicable fluid 2 Classification by type of Gauge Differential is displayed by taking the atmospheric as zero reference. is measured with respect to an arbitrary reference. 3 Classification by port Rc (PT) /8 female M5 female 0-32 UNF female NPT /8 female NPTF /8 female G (PF) /8 female R (PT) /8 male R (PT) /4 male M5 male 0-32 UNF male NPT /4 male NPT /8 male G (PF) /8 male ø4.8 mm ø0.89 in pipe Tapered female Extremely air-tight for high Commonly used in Japan Straight female Fairly air-tight for low Used for low Straight female Fairly air-tight for low Used for low Tapered female Extremely air-tight for high Tapered female Extremely air-tight for high No sealing tape required Straight female Fairly air-tight for low, and easily connectable Commonly used in Europe Tapered male Extremely air-tight for high Commonly used in Japan Straight male Fairly air-tight for low, and easily connectable Straight male Fairly air-tight for low, and easily connectable Tapered male Extremely air-tight for high Straight male Fairly air-tight for low, and easily connectable Commonly used in Europe Easy connection with a tube Used for low INFRMATIN Proximity For noncorrosive gases Diffused semiconductor is used as the transducer. It can be used to measure air. For other gases and liquids Stainless diaphragm is used as the transducer. Besides air, it can be used to measure of gases or liquids which do not corrode stainless steel (SUS 302 and SUS 304) port.
3 999 PRESSURE SENSRS INFRMATIN TYPES F SENSRS Classification table : Applicable model Classification by applicable fluid Model No. For non-corrosive gases For other gases and liquids DP-0 (A) DP-0 -M DP-0 -E-P(-J) DP-0 -N(-P) DP5 / DPH DP4- Digital display DP2-2 DP2-2 F(-P) DP2-4 DP2-6 DP2-80 DP2- N DP2- E DP3-2 DP3-4 DP3-80 DP-M PE- LED bar display PE- N PE- E Stainless diaphragm PLX 2 Classification by type of Gauge Differential Rc (PT) /8 female M5 female 0-32 UNF female NPT /8 female NPTF /8 female G (PF) /8 female Proximity 3 Classification by port R (PT) /8 male R (PT) /4 male M5 male 0-32 UNF male NPT /8 male NPT /4 male G (PF) /8 male ø4.8 mm ø0.89 in pipe
4 PRESSURE SENSRS 000 GLSSARY Term Transducer Non-corrosive gas Absolute Gauge Differential A device which converts one physical quantity into another physical quantity. For example, a transducer converts into an electrical signal or displacement. transducer Electrical signal Gases in the air (nitrogen, carbon dioxide, etc.) and inert gases (argon, neon, etc). Absolute : Gauge : Differential : determined with respect to absolute vacuum as zero determined with respect to the atmospheric as zero higher than the atmospheric is called positive, and lower than it is called vacuum. ranging from vacuum to positive is called compound. Difference between two s Term Hysteresis Temperature characteristics Difference in level at which the output turns N and FF. Hysteresis N FF FF point N point They are specifi ed as the variation in the measured which occurs when the ambient temperature is varied over the rated temperature range, taking the measured at +25 C +77 F or +20 C +68 F as the reference. The variation is expressed as a percentage of full scale. Measured level variation + % F.S. 0 % F.S. +25 C +77 F +50 C (+20 C +68 F) +22 F Ambient temperature INFRMATIN Rated range Set range withstandability Repeatability Absolute Gauge Differential Absolute vacuum Vacuum Atmospheric Positive range over which specifi ed capabilities can be maintained. perable range over which the threshold level can be set for the comparison output. The maximum outside the rated range which can be applied to the sensor without its performance deteriorating when the is brought back to the rated range. Variations in N level when the applied is repeatedly changed to switch the output N / FF under constant supply voltage and temperature. It is expressed as a percentage of the full scale. Maximum operating point Minimum operating point Rated range 00 (% F.S.) Sampling rate Response frequency Response time However, the graph shows typical values. There may be slight variations depending on the product. It is the rate at which data is read and displayed. Since the internal circuit is constantly processing the signal even during display hold, it is possible that the display and the switching output do not match. When the is applied intermittently under constant s, the frequency with which the output can follow the changes is the response frequency. The time delay between the change in the sensing and the turning of the output to N or FF. Sensing Sensing Not sensing operation t t t t N FF t: Response time Proximity Although the analog output changes almost linearly with respect to the measured, there is a slight deviation from an ideal straight line. This deviation, expressed as a percentage of full-scale, is the linearity. 5 4 Maximum error Linearity voltage (V) 3 2 Full scale (kpa)
5 00 PRESSURE SENSRS INFRMATIN GLSSARY Term Degree of protection against water, human body and solid foreign material. Protection degree is specifi ed as per IEC (International Electrotechnical Commission). IEC standard IP Second figure... Protection against water penetration First figure Protection against human body and solid foreign material Protection degree specifi ed by the fi rst fi gure First fi gure Protection degree specifi ed by the second fi gure Second fi gure 0 No protection 0 No protection Protection Protection against contact with internal live parts by a human hand (ø50 mm ø.969 in) Protection against contact with internal live parts by a human finger (ø2 mm ø0.472 in) Protection against contact with internal live parts by a solid object more than 2.5 mm in in thickness or diameter Protection against contact with internal live parts by a solid object more than.0 mm in in thickness or diameter Protection against dust penetration which can affect operation ø50 ø.969 ø2 ø0.472 t 2.5 t t.0 t No harmful effect due to vertically falling water drops No harmful effect due to water drops falling from a range 5 wider than the vertical 5 5 No harmful effect due to water drops falling from a range 60 wider than the vertical No harmful effect due to water splashes from any direction No harmful effect due to direct water jet from any direction 6 Complete protection against dust penetration 6 No water penetration due to direct water jet from any direction Proximity Note: The IEC standard prescribes test procedures for each protection degree given above. The protection degree specifi ed in the product specifi cations has been decided according to these tests. Caution Although the protection degree is specifi ed for the sensor including the cable, the cable end is not waterproof, and is not covered by the protection specifi ed. Hence, make sure that water does not seep in from the cable end. The protection specifi ed concerns the environment in which the sensor can be used. It does not relate to the applicable fl uid. (The DP2 series IP67 type cannot be used with water or other liquids.) 7 8 No water penetration due to immersion in water under specified s No water penetration during immersion, even under s that are more harsh than the ones in No.7. Water should not seep in from here JEM standards (Standards of the Japan Electrical Manufacturer s association) IP67g / IP68g This specifi es protection against oil in addition to IP67 / IP68 protection of IEC standards. It specifi es that oil drops or bubbles should not enter from any direction.
6 PRESSURE SENSRS 002 FUNCTINS Function This compensates the set threshold level for a change in the reference. peration Normal sensing M0 P0 Time a M0: Threshold level P0: Reference M0: P0 + a 2 With reference change M0 P0 P0 α Time FF N FF If the threshold level is set with respect to a particular reference level and if this reference level changes, correct operation will not be possible. Function Automatic sensitivity setting The threshold level is automatically set by making the sensor record values corresponding to actual K and NG products. Application <Confirming for suction> Hysteresis N FF NG K INFRMATIN 3 With auto-reference Different units can be selected. Auto-reference M0 M0 P0 P0 α α N F F Time Auto-reference input M0 = P0 α + a = P0 + a Note: Take care that the data on the reference value is lost when the power supply is switched off. Application <Air leak test> (kpa) 90 SET = 60 0 SET = 30 a Time for pressurizing T0 If the auto-reference input is made N when the reference changes, the threshold level M0 is corrected to a new threshold level M0, which maintains proper judgment. Judgment time Time T K product NG product Auto-reference The above graph shows a curve of the air leak test. The decision on whether the product is K or NG is based upon whether, after reaching the peak value, the reduces by 30 kpa, or more, within a fi xed time interval. 2 The set value is input before applying. SET = 30 3 Apply and then apply the autoreference input at time T0, when the reaches the peak value. As the peak is 90 kpa, the threshold level is automatically changed to 60 kpa. SET = = 60 kpa unit selection Peak hold & bottom hold Analog bar display It is possible to switch to Pa (kpa, MPa), mmhg, kgf/cm 2, bar, psi, mmh2, and inhg. Note: The units that can be selected to will vary depending on the model. Contact our offi ce for details. Peak hold and bottom hold s enable the display of the peak value (maximum value) and the bottom value (minimum value) of the varying measured. These s are convenient for fi nding the variation range or determining the reference for settings. Please note that the peak value and the bottom value data is erased when it is no longer displayed. While the peak hold and bottom hold are displayed, there is a delay in the comparative output response time. changes can also be displayed in an analog fashion using LED bars. Hence, sudden changes can be recognized at a glance. LED bars indicate the level in steps of 0 % F.S. (DP5 series and DP4 series are 4 % F.S.) Analog bar of positive Atmospheric High <DP5 series, DP4 series> <DP2 series, DP3 series> Analog bar of vacuum Atmospheric <DP5 series, DP4 series> High vacuum Proximity Remote zeroadjustment The remote zero-adjustment forcibly sets the value at time of application of an external input signal to zero. <DP2 series, DP3 series>
7 003 PRESSURE SENSRS INFRMATIN FUNCTINS * Function availability table : All models : Equipped on some models : Incorporated with sub-scale Auto-reference Model No. DP-0 (A) DP-0 -M DP-0 -E-P(-J) DP-0 -N(-P) Remote zero-adjustment (Note ) (Note ) (Note ) (Note ) Automatic sensitivity setting DP5 / DPH DP4- Digital display DP2-2 DP2-2 F(-P) DP2-4 DP2-6 DP2-80 DP2- N DP2- E DP3-2 DP3-4 LED bar display Stainless diaphragm (Note ) (Note ) (Note ) (Note ) (Note 2) DP3-80 DP-M PE- PE- N PE- E PLX Peak hold Bottom hold Analog bar display Key protect Hysteresis adjustable unit selection * * * Notes: ) Equipped on the multi- type 2) These are s of optional controllers (sold separately). CNVERSIN TABLE FR PRESSURE UNITS Proximity kpa mmhg ( Torr) kgf/cm 2 kpa mmhg (Torr) kgf/cm 2 atm bar psi (pound/inch 2 ) mmh inhg atm bar psi (pound/inch 2 ) mmh inhg
8 PRESSURE SENSRS 004 PRECAUTINS FR PRPER USE Wring Make sure that the power supply is off while wiring. Verify that the supply voltage variation is within the rating. If power is supplied from a commercial switching regulator, ensure that the frame ground (F.G.) terminal of the power supply is connected to an actual ground. In case noise generating equipment (switching regulator, inverter motor, etc.) is used in the vicinity of this sensor, connect the frame ground (F.G.) terminal of the equipment to an actual ground. If the used power supply generates a surge, connect a surge absorber to the power supply to absorb the surge. Do not run the wires together with high-voltage lines or power lines or put them in the same raceway. This can cause mal due to induction. In order to reduce noise, make the wiring as short as possible. Make sure that stress by forcible bend or pulling is not applied directly to the sensor cable joint. ther ur products have been developed / produced for industrial use. Although the protection degree is specifi ed for the sensor including the cable, the cable end is not waterproof, and is not covered by the protection specifi ed. Hence, make sure that water does not seep in from the cable end. Water should not seep in from here Use within the rated range. Do not apply exceeding the withstandability value. The diaphragm will get damaged and correct operation shall not be maintained. Avoid dust, dirt, and steam. Take care that the sensor does not come in direct contact with water, oil, grease, or organic solvents, such as, thinner, etc. Do not insert wires, etc., into the port. The diaphragm will get damaged and correct operation shall not be maintained. Do not operate the keys with pointed or sharp objects. The usage environment should be within the ranges described in the specifi cations. Use sensors within the range shown in the white part of the ambient temperature / humidity graph below and also within the certifi ed ambient temperature and humidity range of each product. When using sensors within the range shown in the diagonal line shaded part of the graph, there is a possibility that condensation may occur depending on changes in the ambient temperature. Please be careful not to let this happen. Furthermore, pay attention that freezing does not occur when using below 0 C +32 F. Please avoid condensation and freezing when storing the product as well. Ambient humidity (% RH) Avoid condensation. Be careful about freezing when using below 0 C +32 F Ambient temperature ( C F) INFRMATIN Proximity
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