مقياس ضغط تفاضلي
الوصف
مقياس ضغط كبسولي طراز 736.51 يعتمد على نظام القياس الكبسولي المُثبت ويُعد مناسبًا للضغوط المنخفضة جدًا. عند تطبيق الضغط، يتم نقل تمدد عنصر الكبسولة، المتناسب مع الضغط الوارد، إلى الحركة ويُشار إليه.
بالنسبة للإصدار المزود بجهة تلامس للتبديل، تتوفر تلامسات قَفْل مغناطيسي سريعة (snap-action) ومفاتيح القصب (reed switches) وتلامسات إلكترونية. ولتفعيل وحدات التحكم المنطقي القابلة للبرمجة (PLC)، يمكن استخدام التلامسات الإلكترونية ومفاتيح القصب.
الشكل يسارًا: الطراز 736.51، NS 100
الشكل يمينًا: الطراز 736.51، NS 160 مع تلامسات للتبديل
المزايا
- مدى قياس فرق الضغط من 0 … 2.5 mbar
- حماية من الدخول IP66
- العلبة والأجزاء الملامسة للمائع من الفولاذ المقاوم للصدأ
- نسخة بملامس تبديل لتطبيقات PLC
الأسئلة والأجوبة
ما هو أدنى مدى قياس متاح لهذا المقياس؟
يبدأ المدى عند 0 … 2.5 mbar، وتتوفر أيضًا مدى أصغر مثل 0 … 0.5 mbar و0 … 1 mbar و0 … 1.6 mbar.
ما هي دقة القياس؟
فئة الدقة 1.6 وفق المعيار EN 837-1.
ما هي وصلات العملية المتوفرة؟
G ½ B و½ NPT وفق EN 837-1 أو ANSI/B1.20.1، وإصدارات بوصلتين 2xG1/2B و2x1/2NPT.
هل يناسب المقياس الوسائط المسببة للتآكل؟
نعم، فغرفة الوسط مناسبة للوسائط المسببة للتآكل، والأجزاء الملامسة للوسط متوفرة من الفولاذ المقاوم للصدأ 1.4571 مع مواد مانعة للتسرب PTFE أو NBR.
ما هي حدود درجة الحرارة المسموح بها؟
درجة حرارة البيئة والوسط من -20 … +60 °C.
ما مستوى الحماية من دخول الأجسام والماء؟
IP66.
كيف يمكن ربط المقياس بنظام تحكم PLC؟
يتوفر إصدار مزود بجهات تلامس للتبديل: تلامسات مغناطيسية سريعة (snap-action) ومفاتيح قصب (reed switches) وتلامسات إلكترونية (ترانزستور PNP) بتغذية DC 10 ... 30 V، بوصل كهربائي عبر مقبس كابل M20 x 1.5، وبوظائف تبديل مفتوح عادةً ومغلق عادةً وتحويلي حتى 3 جهات تلامس.
ما الذي يميز الطراز 736.51 عن المقاييس المجاورة في عائلة 736؟
الطراز 736.51 هو الإصدار ذو القرص NS 100 من عائلة 736، وهو مخصص للضغوط التفاضلية المنخفضة جدًا بدءًا من 2.5 mbar بعنصر كبسولي، مع علبة وأجزاء ملامسة من الفولاذ المقاوم للصدأ وحماية IP66 وخيار جهات تلامس للتبديل.
| الطراز | 736.51 |
| السلسلة | 736 |
| النوع الفرعي | Differential pressure gauge |
| نطاق الضغط | 0…2.5 mbar · 0…4 mbar · 0…6 mbar · 0…10 mbar · 0…25 mbar · 0…40 mbar · 0…60 mbar · 0…100 mbar · 0…16 mbar · 0…160 mbar · 0…25 inH2O · 0…0.5 kPa · 0…1 kPa · 0…1.6 kPa · 0…2.5 kPa · 0…4 kPa · 0…6 kPa · 0…10 kPa · 0…1000 mmH2O · 0…5 inH2O · 0…10 inH2O · 0…15 inH2O · 0…20 inH2O · 0…30 inH2O · 0…40 inH2O · 0…600 mbar · 0…1000 mbar · 0…25 mm H2O · 0…40 mm H2O · 0…60 mm H2O · 0…100 mm H2O · 0…160 mm H2O · 0…250 mm H2O · 0…400 mm H2O · 0…600 mm H2O · 0…1000 mm H2O · 0…5 in H2O · 0…10 in H2O · 0…15 in H2O · 0…20 in H2O · 0…25 in H2O · 0…30 in H2O · 0…40 in H2O · 0…0.5 mbar · 0…1 mbar · 0…1.6 mbar · 0…25 mmH2O · 0…40 mmH2O · 0…60 mmH2O · 0…100 mmH2O · 0…160 mmH2O · 0…250 mmH2O · 0…400 mmH2O · 0…600 mmH2O |
| فئة الدقة | 1.6 |
| معيار الدقة | EN 837-1 |
| وصلة العملية | G ½ B½ NPTEN 837-1ANSI/B1.20.12xG1/2B2x1/2NPT |
| درجة حرارة العملية | −20…+60 °C |
| إشارة الخرج | Magnetic snap-action contact · Electronic contact (PNP transistor) · Reed switch · Reed contact |
| التغذية | DC 10 ... 30 V |
| وصلة كهربائية | Cable socket, M20 x 1.5 |
| وظيفة التبديل | Normally open, Normally closed, Change-over |
| نقاط التبديل | 3 |
| مادة العلبة | Stainless steel 1.4571 (316 Ti) |
| مادة الأجزاء الملامسة | Stainless steel 1.4571, Aluminium, Laminated safety glass, PUR, PTFE, NBR |
| مادة الإحكام | PTFE, NBR |
| حرارة المحيط | −20…+60 °C |
| تصنيف IP | IP66 |
| الوزن | 1.7 kg |
| الشهادات | CERoHSCRNEAC |
| قطر القرص | 100 mm |
| لغات ورقة البيانات | EN, DE |
| Pressure gauge | Switch contact | |||
|---|---|---|---|---|
| Without | Magnetic snap-action contact (model 821) | Electronic contact (model 830 E) | Reed contact (model 851) | |
| Model 736.51, with capsule | x | |||
| element | x | |||
| x | ||||
| x |
| Nominal size | ■ Ø100mm ■ Ø160mm |
|---|---|
| Window | Laminated safety glass |
| Case | |
| Design | Safety level 'S1' per EN 837-1:With blow-out device |
| Material | Stainless steel 1.4571 (316 Ti) |
| Ring | Bayonet ring, stainless steel |
| Mounting | ■ Without ■ Panel mounting flange, stainless steel ■ Panel mounting flange, polished stainless steel ■ Triangular profile ring with mounting bracket, polished stainless steel ■ Surface mounting flange, stainless steel |
| Case filling | ■ Without ■ Silicone oil |
| Movement | Stainless steel |
| Type of measuring element | Capsule element |
|---|---|
| Material | Stainless steel 1.4571 |
| Leak tightness | Helium tested, leakage rate: < 5∙10 -3 mbar l/s |
| Accuracy class | ■ 1.6 ■ 1.0 |
|---|---|
| Temperature error | On deviation from the reference conditions at the measuring system: max. ±0.6 %/10 K of full scale value |
| Zero point setting | Via adjustment appliance at case circumference at 12 o'clock, stainless steel (wetted) |
| Reference conditions | |
| Ambient temperature | +20 °C |
عرض الكل (16)
| Scale range | ||||
|---|---|---|---|---|
| mbar | ||||
| 0 ... 2.5 | 0 ... 4 | 0 ... 6 | 0 ... 10 | 0 ... 16 |
| 0 ... 25 | 0 ... 40 | 0 ... 60 | 0 ... 100 | |
| 0 ... 0.5 0 ... 6 | 0 ... 1 0 ... 10 | 0 ... 1.6 | 0 ... 2.5 | 0 ... 4 |
| 0 ... 25 | 0 ... 40 | 0 ... 60 | 0 ... 100 | 0 ... 160 |
| mmH 2 O | 0 ... 1,000 | |||
| 0 ... 250 in H 2 O | 0 ... 400 | 0 ... 600 | ||
| 0 ... 5 | 0 ... 10 | 0 ... 15 | 0 ... 20 | 0 ... 25 |
| 0 ... 25 | 0 ... 30 | 0 ... 40 |
| Connection method | Magnetic snap-action contact |
|---|---|
| Switching technology | ■ No control unit and no supply voltage required ■ Direct switching up to 250 V, 1 A |
| Number of switch contacts | |
| Span ≥ 25 mbar ...< 40 mbar 1) | Max. 2 switch contacts |
| Span ≥ 40 mbar | Max. 3 switch contacts 2) |
| Switching function | ■ Separate circuits with ≥ 2 switches ■ Cable break monitoring with parallel resistance (47 kΩ or 100 kΩ) The switching function of each switch is indicated by index 1, 2 or 3 |
| Model 821.1 | Normally open (clockwise pointer motion) |
| Model 821.2 | Normally closed (clockwise pointer motion) |
| Model 821.3 | Change-over; one contact breaks and one contact makes simultaneously when pointer reaches set point |
| Switch point setting | Set pointers of the contact pressure gauges are freely adjustable over the full scale range |
| Setting range (recommended) | 25 ... 75 %of span (0 ... 100 %onrequest) |
| Distance between switch points | Recommended minimum distance between 2 contacts: 20 %of span |
| Switch hysteresis | 2 ... 5 %(typical) |
| Switching current | 0.02 ... 0.3 A (resistive load) Permissible switch-on and switch-off current: ≤ 0.5 A |
| Switching voltage | AC/DC 24 ...250V |
| Switching power | |
| Unfilled instruments | ≤ 30 W, ≤ 50VA |
| Filled instruments | ≤ 20 W, ≤ 20VA |
| Contact material | ■ Silver-nickel, gold-plated |
| Switching voltage | Unfilled instruments | Filled instruments | ||||
|---|---|---|---|---|---|---|
| Resistive load | Inductive load | Resistive load | Inductive load | |||
| Direct cur - rent | Alternating current | cos ϕ>0.7 | Direct cur - rent | Alternating current | cos ϕ>0.7 | |
| DC 220 V / AC 230 V | 100mA | 120mA | 65mA | 65mA | 90mA | 40mA |
| DC 110 V / AC 110 V | 200mA | 240mA | 130mA | 130mA | 180mA | 85mA |
| DC 48 V / AC 48 V | 300mA | 450mA | 200mA | 190mA | 330mA | 130mA |
| DC 24 V / AC 24 V | 400mA | 600mA | 250mA | 250mA | 450mA | 150mA |
| Connection method | Electronic contact (PNP transistor) |
|---|---|
| Switching technology | ■ For direct triggering of a programmable logic controller (PLC) ■ Long service life due to non-contact sensor ■ Low influence on the indication accuracy ■ Fail-safe switching at high switching frequency ■ Insensitive to corrosion |
| Number of switch contacts | |
| Span ≥ 25 mbar | Max. 3 switch contacts |
| Switching function | Contact versions: ■ 2-wire system ■ 3-wire system The switching function of each switch is indicated by index 1 or 2 |
| Model 830 E.1 | Normally open (clockwise pointer motion) |
| Model 830 E.2 | Normally closed (clockwise pointer motion) |
| Setting range (recommended) | 10 ... 90 %of span (0 ... 100 %onrequest) |
| Distance between switch points | Up to 2 contacts can be set to an identical set point. For a version with 3 contacts this is not possible.The left (1st) or right (3rd) contact may not be set to the same set point as the oth- er 2 contacts.The required displacement is approx. 30°, optionally to the right or to the left. |
| Switching current | ≤ 100mA |
| Switching voltage | DC 10 ...30V |
| Connection method | Bistable reed switch |
|---|---|
| Switching technology | ■ No control unit and no supply voltage required ■ Direct switching up to 250 V, 1 A ■ For direct triggering of a programmable logic controller (PLC) ■ Free from wear as without contact |
| Number of switch contacts | |
| NS 100 | Max. 2 switch contacts |
| NS 160 | 1 switch contact |
| Switching function | ■ Separate circuits with ≥ 2 switches ■ Cable break monitoring with parallel resistance (47 kΩ or 100 kΩ) The switching function of each switch is indicated by index 1, 2 or 3 |
| Model 851.3 | Change-over; one contact breaks and one contact makes simultaneously when pointer reaches set point |
| Switch point setting | Set pointers of the contact pressure gauges are freely adjustable over the full scale range |
| Setting range (recommended) | 10 ... 90 %of span |
| Distance between switch points | When using two contacts, these cannot be set to the same point. Depending on the switch- ing function, a minimum clearance of 15 ... 30° is required. |
| Switch hysteresis | 3 ...5% |
| Switching current | AC/DC 1 A |
| Switching voltage 1) | AC/DC 250V |
| Switching power | 60 W, 60VA |
| Contact material | Rhodium |
| Transport current | AC/DC 2 A |
| Inductive load cosϕ | 1 |
| Contact resistance (static) | 100mΩ |
| Insulation resistance | 109Ω |
| Breakdown voltage | DC 1,000V |
| Switching time incl. contact chatter | 4.5 ms |
| Connection type | ■ Cable socket, black PerVDE 0110 insulation group C/250V Cable gland M20 x 1.5 ■ Connector (instead of cable socket) |
|---|---|
| Wire cross-section | 6 screw terminals + PE for 2.5 mm² |
| Cable diameter | →See dimensions |
| Pin assignment | Connection details are given on the product label of the instrument. Connection termi- nals and ground terminals are appropriately marked. |
| Material | PA 6 (polyamide) |
| Medium temperature | +60 °C [+140 °F] maximum |
|---|---|
| Ambient temperature | -20 ...+60 °C [-4 ... 140 °F] |
| Storage temperature | -20 ...+60 °C [-4 ... 140 °F] |
| Pressure limitation | |
| Steady | Full scale value |
| Fluctuating | 0.9 x full scale value |
| Ingress protection of the complete instrument | IP66 per IEC/EN 60529 |
| Logo | Description | Region |
|---|---|---|
| EU declaration of conformity | European Union | |
| EMCdirective | ||
| - | CRN Safety (e.g. electr. safety, overpressure, ...) | Canada |
| Logo | Description | Region |
|---|---|---|
| EAC (option) Pressure equipment directive | Eurasian Economic Community | |
| GOST Metrology, measurement technology | Russia | |
| KazInMetr Metrology, measurement technology | Kazakhstan | |
| - | MTSCHS Permission for commissioning | Kazakhstan |
| BelGIM Metrology, measurement technology | Belarus | |
| UkrSEPRO Metrology, measurement technology | Ukraine | |
| Uzstandard Metrology, measurement technology | Uzbekistan |
| Certificates | ■ 2.2 test report per EN 10204 (e.g. state-of-the-art manufacturing, indication accuracy) ■ 3.1 inspection certificate per EN 10204 (e.g. indication accuracy) |
|---|---|
| Recommended calibration interval | 1 year (dependent on conditions of use) |
| NS | Dimensions in mm[in] | Weight in kg [lb] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| a | b | D 1 | D 2 | d | e | G | h ±1 | X | SW | ||
| 100 | 15.5 [0.61] | 49.5 [1.95] | 101 [3.98] | 99 [3.90] | 133 [5.24} | 17.5 [0.69] | G½B | 170 [6.69] | 37 [1.46] | 22 [0.87] | 1.70 [3.75] |
| 160 | 15.5 [0.61] | 49.5 [1.95] | 161 [6.34] | 159 [6.26] | 133 [5.24} | 17.5 [0.69] | G½B | 200 [7.87] | 37 [1.46] | 22 [0.87] | 2.20 [4.85] |
| Model | Description | Order number | |
|---|---|---|---|
| 910.17 | Sealings →See data sheet AC 09.08 | - | |
| IV3x, IV5x | Valve manifold for differential pressure measuring instruments →See data sheet AC 09.23 | - | |
| - | Diaphragm seal | On request |
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