# مرسل — GDHT-20

> للكثافة ودرجة الحرارة والضغط ورطوبة غازات العزل، مع خرج Modbus ®

- رمز الكتالوج: gdht_20
- الطراز: GDHT-20
- الفئة: حلول غاز SF6 › Gas density sensors
- صفحة المنتج: https://avigan.com.ua/wika/ar/products/gdht_20
- السعر: عند الطلب
- المورد: AVIGAN (TOV VIKA Prylad)، الشريك الرسمي لشركة WIKA في أوكرانيا

## نظرة عامة

الطراز GDHT-20 جهاز إرسال ✓للكثافة ودرجة الحرارة والضغط ورطوبة غازات العزل، مع خرج Modbus® ►إلى المعلومات!

## التطبيقات

- Permanent monitoring of the relevant gas condition parameters in closed tanks
- For internal and external SF 6 -insulated equipment

## المزايا

- High-accuracy sensor technology
- Modbus ® output protocol via RS-485 interface
- Ingress protection IP65
- Very good long-term stability and EMC characteristics
- Compact dimensions

## المواصفات الفنية

| المعيار | القيمة |
|---|---|
| model | GDHT-20 |
| product family | GDHT |
| short description | Transmitter for density, temperature, pressure and moisture of insulation gases with Modbus output |
| subcategory | Transmitter |
| certifications | RoHS; EMC; CE |
| ambient temp | -40 … 80 °C |
| ip rating | IP65 |
| weight kg | 0.4 |
| languages in datasheet | en |
| pressure ranges | 0 … 8.87 bar; 0 … 16 bar |
| density referenced to C | 20 |
| process connections | DN 20, female thread; Malmkvist; Flange D40; Via measuring chamber; DN 8, female thread; G 1 B, male thread, stainless steel; G ½ B, male thread; G1B, male thread, stainless steel; G½B, male thread; G 1 B; DN 20; G ½ B; DN 8 |
| wetted parts material | Stainless steel |
| output signal | Modbus RTU; Modbus RTU via RS-485; Density in g/litre, kg/m3; Temperature in °C, °F, K; Absolute pressure in mbar, Pa, kPa, MPa, psi, N/cm2, bar; Humidity in ppmv, ppmw; Dew point in °C at tank pressure, °C at atmospheric pressure; Frost point in °C at tank pressure, °C at atmospheric pressure; Relative humidity in %; Absolute pressure at 20 °C in bar, MPa; Gauge pressure at 20 °C in bar, MPa; RS-485 |
| has temperature compensation | true |

## جداول ورقة البيانات

### Accuracy specifications

| 1 | 2 | 3 |
|---|---|---|
| Accuracy | Specifications only valid for pure, gaseous SF 6 |  |
| Dew point | → See graphic below the table |  |
|  | SpanT gas -T d < 60 K | Measured value deviation < ±2 K |
|  | SpanT gas -T d < 80 K | Measured value deviation < ±3 K |
| Density | ±0.6 %, ±0.35 g/litre (-40 ... 80 °C [-40 ...+176 °F]) |  |
| Temperature | ±1 K |  |
| Pressure | -40 ...< 0 °C [-40 ...+32 °F] | ±0.2 %, ±32 mbar |
|  | 0 ... 80 °C [32 ... 176 °F] | ±0.06 %, ±10 mbar |
| Long-term drift per IEC 61298-2 |  |  |
| Temperature | ≤ ±0.1 %of span/year |  |
| Pressure | ≤ ±0.05 %of span/year |  |
| Dew point | ≤ ±0.5 %of span/year |  |

### Measuring range

| Dew point at atmospheric pressure | -60 ...+40 °C [-76 ...+104 °F] Td |
|---|---|
| Density | 0 ... 60 g/litre (8.87 bar abs. SF₆ gas at 20 °C [68 °F]) |
| Temperature | -40 ...+80 °C [-40 ...+176 °F] |
| Pressure at 20 °C [68 °F] | 0 ... 8.87 bar abs. SF₆ gas |
| Pressure | 0 ... 16 bar abs. |
| Burst pressure | 52 bar abs. |
| Overload limit | Up to 30 bar abs. |
| Pressure reference | Absolute |

### Process connection

| Process connection | ■ G1B, male thread, stainless steel ■ DN 20, female thread ■ G½B,male thread ■ Malmkvist  ■ Flange D40 ■ Via measuring chamber (see page 5) ■ DN 8, female thread Other connections on request |
|---|---|

| Output signal | 2 |
|---|---|
| Signal type | Modbus  output |
| Retrievable measured values | Measured values with alternative units can be retrieved directly in the Modbus  registers. |
| Density | ■ g/litre ■ kg/m 3 |
| Temperature | ■ °C ■ °F ■ K |
| Absolute pressure | ■ mbar ■ Pa ■ kPa ■ MPa ■ psi ■ N/cm 2 ■ bar |
| Humidity | ■ ppm v ■ ppm w |
| Dew point | ■ °C at tank pressure ■ °C at atmospheric pressure |
| Frost point | ■ °C at tank pressure ■ °C at atmospheric pressure |
| Relative humidity | ■ % |
| Absolute pressure at 20 °C [68 °F] | ■ bar ■ MPa |
| Gauge pressure at 20 °C [68 °F] (based on 1,013 mbar) | ■ bar ■ MPa |
| Alternative gases | Gas mixtures and components can be freely configured and combined from the gases SF₆, N₂, CF₄, O₂, CO₂, 3M™Novec™ 4710, He and Ar via Modbus ®. The calculation is based on the physical principle of the partial pressure method. |
| Voltage supply |  |
| Supply voltage U B + | DC 17 ...30V |
| Power consumption | Max.0.5W (max. 3 Wduring the heating phase of the humidity sensor) |
| Refresh rate |  |
| Density | 20 ms |
| Temperature | 20 ms |
| Pressure | 20 ms |
| Dew point | ■ 2 s (typical) ■ Auto-adjustment cycle, every 30 min., adjustable |

### Electrical connection

| Connection type | ■ Circular connector M12 x 1 (5-pin) ■ Modbus  RTU via RS-485 interface |
|---|---|
| Ingress protection | IP65, only when plugged in and using mating connectors with the corresponding ingress protection |
| Electrical safety | Protected against reverse polarity, protected against overvoltage |

### Circular connector M12

| 1 | 1 - - 2 U B + 3 U B - Ground 4 A |
|---|---|
|  | Supply voltage |
|  | Signal RS-485 |
|  | 5 B Signal RS-485 |

### Material

| 1 | 2 |
|---|---|
| Material (in contact with the environment) |  |
| Case | Stainless steel |

### Operating conditions

| Ambient temperature range | -40 ...+80 °C [-40 ...+176 °F] |
|---|---|
| Permissible air humidity | ≤ 90 %r.h. (non-condensing) |
| Dimensions |  |
| Diameter | 48 mm[1.89 in] |
| Height | 96 mm[3.78 in] |
| Weight | approx. 0.4 kg [0.88 lbs] |
| EMC tests |  |
| Immunity per IEC 61000-4-3 | 30 V/m (80 MHz ... 6 GHz) |
| Burst per IEC 61000-4-4 | 4 kV |
| Surge immunity per IEC 61000-4-5 | 2 kV conductor to ground, 1 kV conductor to conductor |
| ESD per IEC 61000-4-2 | 8 kV/15 kV, contact/air |
| Conducted HF signals in accordance with IEC 61000-4-6 | 10V (0.15 kHz …80MHz) |

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity EMCdirective, EN 61326 emission (group 1, class B) and immunity (industrial application) RoHS directive | European Union |

| Designation | Order number |
|---|---|
| Modbus ® startup kit for measured value recording and configuration, consisting of: ■ Power supply unit for transmitter ■ Cable with M12 x 1 connector ■ Interface converter (RS-485 to USB) ■ USB cable type A to type B ■ Modbus ® tool software | 14075896 |
| WIKAsoft-GD for configuration and testing of the sensor | Free download from: www.wika.com/download |

| Sealing | Order number |
|---|---|
| Sealing for G1Bmalethread process connection (included in the standard scope of delivery) | 14046738 |

| Shielded cable, M12 x 1, AWG20 | Order number |
|---|---|
| Length1m | 14430138 |
| Length2m | 14430140 |
| Length3m | 14430141 |
| Length4m | 14430142 |
| Length5m | 14297684 |
| Length6m | 14430143 |
| Length7m | 14430144 |
| Length8m | 14430145 |
| Length9m | 14430148 |
| Length 10m | 14297685 |
| Length 15m | 14430149 |
| Length 20m | 14430150 |
| Length 25m | 14430151 |
| Length 30m | 14430152 |
| Length 50m | 14430153 |

## المستندات

- [ds_sp6014_en_co_b84124](https://avigan.com.ua/wika/docs/wika/ds_sp6014_en_co.pdf) — PDF, 495 KB, en