# قياس درجة الحرارة

- رمز الكتالوج: temperature
- الفئة: قياس درجة الحرارة
- صفحة المنتج: https://avigan.com.ua/wika/ar/products/temperature
- السعر: عند الطلب
- المورد: AVIGAN (TOV VIKA Prylad)، الشريك الرسمي لشركة WIKA في أوكرانيا

## نظرة عامة

تقدم WIKA أجهزة قياس درجات الحرارة الإلكترونية والميكاترونية والميكانيكية حتى تصاميم مخصصة فردية.

## جداول ورقة البيانات

| Possible failure cases in electrical thermometers | Resistance thermometer, 2-wire connection | Resistance thermometer, 3-wire connection | Resistance thermometer, 4-wire connection | Thermo- couple |
|---|---|---|---|---|
| Open circuit | λ DD | λ DD | λ DD | λ DD |
| Short circuit | λ DD | λ DD | λ DD | λ DU |
| Drift | λ DU | λ DU | λ DU | λ DU |
| Change in the lead resistance | λ DU | λ DD 1) | λ DD | λ DD |

| 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| Type of fault | Close coupled | Extension wire |  |  |
|  | Low stress | High stress | Low stress | High stress |
| Open circuit | 95 FIT | 1,900 FIT | 900 FIT | 18,000 FIT |
| Short circuit | 4 FIT | 80 FIT | 50 FIT | 1,000 FIT |
| Drift | 1 FIT | 20 FIT | 50 FIT | 1,000 FIT |

| 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| Type of fault | Close coupled | Extension wire |  |  |
|  | Low stress | High stress | Low stress | High stress |
| Open circuit | 42 FIT | 830 FIT | 410 FIT | 8,200 FIT |
| Short circuit | 3 FIT | 50 FIT | 20 FIT | 400 FIT |
| Drift | 6 FIT | 120 FIT | 70 FIT | 1,400 FIT |

| 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| Type of fault | Close coupled | Extension wire |  |  |
|  | Low stress | High stress | Low stress | High stress |
| Open circuit | 38 FIT | 758 FIT | 371 FIT | 7,410 FIT |
| Short circuit | 1 FIT | 29 FIT | 10 FIT | 190 FIT |
| Drift | 9 FIT | 173 FIT | 95 FIT | 1,900 FIT |

| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|
| SFF | Hardware fault tolerance |  |  |  |  |  |
|  | 0 | 1 | 2 |  |  |  |
|  | Type A | Type B | Type A | Type B | Type A | Type B |
| < 60% | SIL 1 | not allowed | SIL 2 | SIL 1 | SIL 3 | SIL 2 |
| 60…<90% | SIL 2 | SIL 1 | SIL 3 | SIL 2 | SIL 4 | SIL 3 |
| 90…<99% | SIL 3 | SIL 2 | SIL 4 | SIL 3 | SIL 4 | SIL 4 |
| ≥ 99% | SIL 3 | SIL 3 | SIL 4 | SIL 4 | SIL 4 | SIL 4 |

| Safety Integrity Level (SIL) | Average probability of a dangerous failure on demand of a safety function (PFDavg) | Average frequency of a dangerous failure per hour (PFH) |
|---|---|---|
| 4 | ≥ 10 -5 to < 10 -4 | ≥ 10 -9 to < 10-8 h -1 |
| 3 | ≥ 10 -4 to < 10 -3 | ≥ 10 -8 to < 10 -7 h -1 |
| 2 | ≥ 10 -3 to < 10 -2 | ≥ 10 -7 to < 10 -6 h -1 |
| 1 | ≥ 10 -2 to < 10 -1 | ≥ 10 -6 to < 10 -5 h -1 |

| Abbreviation | Definition |
|---|---|
| Close coupled | The temperature transmitter is located in the connection head of the electrical thermometer (head-mounted). |
| DC | Diagnostic coverage |
| Extension wire | The temperature transmitter is located outside of the connection head of the electrical thermometer, and is located, for example, in a cabinet distant from the measuring point (remote-mounted). |
| FIT | Failures in time |
| HFT | Hardware Fault Tolerance |
| High Stress | Applications with vibration (≥ 67 %of the maximum vibration resistance of the electrical thermometer) |
| Low stress | Low vibration (< 67 %of the maximum vibration resistance of the electrical thermometer) |
| PFDavg | Average probability of a dangerous failure on demand of the safety function |
| PFH | Average frequency of a dangerous failure of the safety function |
| RTD | &#x27; R esistance t emperature d etector&#x27;; resistance thermometer |
| SFF | Safe Failure Fraction of a hardware element |
| SIS | Safety Instrumented System |
| TC | T hermo c ouple |
| TR | &#x27; T emperature R esistance&#x27;; resistance thermometer |

## المستندات

- [ds_in0019_v223_en_co_e9c9bc](https://avigan.com.ua/wika/docs/wika/ds_in0019_v223_en_co.pdf) — PDF, 957 KB, en