APG-500C المقاومة الدقيقة (بيراني) الارسال فراغ

الاسم الكامل: APG-500C Precision Resistance (بيراني) الارسال فراغ (Pirani Gauge)

Commonly known as Chengzhen vacuum transmitter gauge, equivalent to INFICON PSG500

ماركة: Chengdu Zhenghua Electronic Instrument, Trademark: 【Chengzhen】

✅ المواصفات الرئيسية

مبدأ القياس: بيراني (thermal conduction resistance vacuum gauge)

نطاق القياس: 5×10⁻² Pa ～ 1×10⁵ Pa (Air / N₂)

مزود الطاقة: 13.5~ 30 فولت تيار مستمر, Power consumption ≤2W, Max inrush current ＜300mA

الإخراج التناظري: Logarithmic voltage 1.9～10.0 VDC (0~0.5V indicates filament failure)

الواجهة الكهربائية: RJ45 (8-core FCC68)

Vacuum Flange: Standard KF16 (mainstream version)

Max Pressure Withstand: ≤0.2 MPa (absolute pressure)

وقت الاستجابة: 100 آنسة

متطلبات التركيب: التثبيت العمودي, keep away from heat sources and vibration sources

الوسائط القابلة للتطبيق: Air, N₂, O₂, CO and other inert gases only; Combustible, explosive and strongly corrosive gases are prohibited

📌 RJ45 Pin Definition

Relay Rating: تيار مستمر 30 فولت / 500أماه (Only APG500CC supports multi-point threshold control; standard APG-500C has no adjustable control points)

📎 Gas Correction Factor (Reading × C)

Air/N₂/O₂/CO=1.0；H₂=0.5；He=0.8；Ar=1.7；CO₂=0.9；Xe=3.0；Kr=2.4；Ne=1.4；Water vapor=0.5

🛠 Calibration Notes

1. Preheat for at least 10 min before calibration; continuous power-on is recommended to maintain thermal balance
2. ATM full-scale calibration: At atmospheric pressure, set to 1×10⁵ Pa → 10.0 VDC
3. HV zero calibration: Pump down to ≤1×10⁻² Pa, set to 1×10⁻² Pa → 1.5 VDC

📌 Matching Products & البدائل

Matching indicator: PDM-5203, PDM-520C

Import equivalent: INFICON PSG500

Upgraded model in same series: APG-500CC (with adjustable relay threshold)

Common failure: Platinum wire contamination, platinum wire burnout (fault output 0~0.5V). Contamination damage is excluded from warranty

📋 Typical Applications

Coating machines, vacuum furnaces, leak detection systems, vacuum packaging, negative pressure processes, coarse & medium vacuum monitoring for semiconductor

APG-500C (Chengzhen/Zhenghua) قائمة التحقق من استكشاف الأخطاء وإصلاحها

شرط مسبق: Distinguish between 【gauge failure】, 【wiring/acquisition side failure】 and 【vacuum system leakage / process issue】 first; 0~0.5V output = filament failure (سلك مكسور / heavy contamination). This is a hard fault, and contamination damage is not covered by warranty.

الأدوات المطلوبة: Multimeter for RJ45 pin voltage measurement, megohmmeter, standard vacuum source, leak detector

1. عيب: Fixed output 0～0.5V (fault voltage)

أعراض: Voltage locked at 0~0.5V, reading unchanged regardless of vacuum, indicator reports fault

الأسباب الجذرية:

1. Burned platinum thermal wire (الأكثر شيوعا; easily damaged by repeated atmospheric shock, sudden venting or overpressure)
2. Heavy oil contamination / coating dust covering the thermal wire inside the gauge, causing thermal conduction failure
3. Broken wire inside RJ45 plug, poor contact on pin1/pin2 power supply
4. Damaged drive PCB inside gauge

خطوات استكشاف الأخطاء وإصلاحها:

① Measure pin1 & pin2 with multimeter to confirm stable 13.5~30VDC supply

② Test with a confirmed good dedicated RJ45 cable

③ If power supply is normal and output remains 0~0.5V after cable replacement → sensor defective

علاج: Replace the gauge head directly. Do not disassemble and clean the thermal wire by yourself (easy to cause permanent damage and void warranty)

2. عيب: No output at all, no signal on meter, floating reading on PLC

أعراض: No voltage at signal terminals, same as no connection

الأسباب الجذرية:

1. مصدر الطاقة مفقود, قطبية عكسية, الصمامات في مهب
2. Broken core inside RJ45 cable, bad crimp on crystal head, broken signal core pin3/pin5
3. Mismatched input impedance of acquisition terminal (required ≥10kΩ)

خطوات استكشاف الأخطاء وإصلاحها:

① Measure voltage pin1-pin2, التحقق من القطبية (pin1=24V+, pin2=GND)

② Power the gauge separately and measure analog output directly at pin3 & pin5 to rule out rear-end wiring/module faults

③ Confirm PLC/display meter supports high-impedance voltage input; do not use current input channel

علاج: Replace cable, correct power polarity, use compatible acquisition channel

3. عيب: Inaccurate reading, large deviation, wrong value at atmosphere or high vacuum

أعراض: Not 1E5Pa at atmospheric pressure, cannot reach expected vacuum after pumping, large deviation compared with reference gauge

الأسباب الجذرية:

1. No preheating or calibration (≥10min preheating required)
2. Gas is not air/N₂ and gas correction factor not applied (large deviation for Ar, He, H₂)
3. Slight contamination or long-term drift of thermal wire
4. Wrong mounting orientation (non-vertical installation, condensate/dust accumulates on thermal wire)
5. Leakage at KF flange, aged KF O-ring, misaligned gasket
6. Gauge inlet partially blocked by oil mist or dust

خطوات استكشاف الأخطاء وإصلاحها:

① Atmosphere calibration: Vent to atmosphere, stabilize for 10 دقيقة, perform atmospheric calibration

② Pump down to ≤1×10⁻²Pa for zero calibration

③ Confirm gas type and apply correction factor

④ Check mounting posture: التثبيت العمودي, flange downward or lateral; avoid upside-down installation which causes liquid accumulation

⑤ Isolate gauge and perform leak test for chamber leak rate

علاج: إعادة المعايرة, adjust installation, replace sealing ring, add front oil baffle; replace sensor if heavily contaminated

4. عيب: Reading fluctuates continuously, severe drift and instability

أعراض: Vacuum is stable but reading jumps back and forth

الأسباب الجذرية:

1. Large ripple / unstable power supply, shared power supply with high-power motors or inverters
2. Signal cable routed together with power cable, التداخل الكهرومغناطيسي
3. Intrinsic pressure fluctuation of system (pump pulsation, frequent valve switching, airflow disturbance)
4. Slight contamination or aging of thermal wire
5. التأريض السيئ, mixed analog signal ground and power ground

خطوات استكشاف الأخطاء وإصلاحها:

① Use isolated DC power supply for independent gauge power supply

② Single-end grounding for cable shield, الابتعاد عن كابلات الطاقة

③ Remove gauge and power on in static atmosphere; if stable at atmosphere → fault from system airflow / تسرب

علاج: Add shielding, isolated power supply, optimize grounding; add damping tube on chamber

5. عيب: Permanent atmospheric reading (~10 فولت), reading does not drop while pumping

أعراض: Pump keeps running, gauge stays at atmospheric pressure reading

الأسباب الجذرية:

1. Severe leakage at KF flange, missing or damaged O-ring
2. Isolation valve before gauge closed, gauge separated from chamber
3. Gauge inlet fully blocked by solid deposit, gas cannot enter gauge cavity
4. Internal circuit fault, output locked at full scale

خطوات استكشاف الأخطاء وإصلاحها:

① Close gauge isolation valve, test gauge under vacuum separately to distinguish gauge fault or system leakage

② Visual check KF O-ring and clamp compression

③ Disassemble flange and check inlet for coating material / dust blockage

علاج: Leak detection, open valve, clean inlet; replace sensor if blocked and thermal wire contaminated

6. عيب: Abnormal relay setpoint (APG-500CC relay version only)

أعراض: Relay does not trigger / false trigger at target vacuum

الأسباب الجذرية:

1. Wrong threshold calibration procedure (incorrect timing of setting button)
2. Relay contact overloaded (max DC30V/500mA; cannot drive high-power load directly)
3. Oxidized or welded contacts
4. انحراف الإشارة, mismatch between actual vacuum and gauge output voltage

خطوات استكشاف الأخطاء وإصلاحها:

① Relearn threshold following manual (hold setting pin, reach target vacuum then release)

② Test contact continuity with multimeter under no-load condition

③ Add intermediate relay for load isolation

علاج: إعادة المعايرة; replace whole transmitter if contacts damaged

7. عيب: Frequent filament burnout (high failure rate)

Trigger list (engineering prevention focus)

1. Fast frequent venting of chamber, instantaneous airflow impact on thermal wire
2. Continuous deposition of process oil mist and evaporation coating material on thermal wire
3. Overpressure shock (＞0.2 MPa absolute)
4. Combustible / corrosive gas entering gauge tube (prohibited for this model)
5. Upside-down installation, condensate dripping directly onto thermal wire

التدابير المضادة: Install front oil trap, slow venting, add isolation valve, التثبيت العمودي, restrict process gas

✅ Quick Self-Check Sequence (on-site recommended order)

1. قياس جهد الإمداد (pin1, pin2) → rule out reverse polarity / انخفاض الجهد
2. Measure analog output (pin3, pin5), first check if it is 0~0.5V fault state
3. Cross-test with spare cable to separate gauge fault or cable / backend acquisition fault
4. Static atmosphere test, check whether reading stabilizes at atmospheric pressure
5. Isolated vacuum test to distinguish 【gauge drift】 or 【chamber leakage / pump issue】
6. معايرة, check mounting posture, oil baffle and sealing

⚠️ Important Disclaimer

Thermal wire contamination, oil fouling and burnout caused by dust are not covered under warranty. The manufacturer usually only supplies replacement gauge heads instead of repair.

Do not disassemble gauge head or flush internal thermal wire with solvent, permanent damage may occur immediately.

Pirani gauge is gas-dependent and not universal vacuum gauge; correction is mandatory for Ar, He, H₂.

Chengzhen (Chengdu Zhenghua ZHAC) قائمة النماذج الكاملة

ماركة: Chengzhen / Chengdu Zhenghua Electronic Instrument; grouped by category; APG Pirani transmitter (your main model) في الأعلى

1. بيراني / Resistance Vacuum Transmitters (Integrated transmitter gauge, PLC direct acquisition, equivalent to INFICON PSG500)

APG-500C: Standard Pirani resistance transmitter, RJ45, logarithmic output 1.9~10V, KF16

APG-500CC: Version with adjustable relay threshold output

FPG550: مقاومة + piezoresistive composite transmitter (مجموعة واسعة, atmosphere down to rough vacuum)

ATG-530: 1Torr range precision transmitter

2. Vacuum Gauge Tubes (Separate type, requires matching indicator)

Resistance Gauge (بيراني)

ZJ-52T: Classic resistance vacuum gauge tube (glass gauge, KF, CF flange options)

Thermocouple Gauge

ZJ-51

ZJ-53B

ZJ-54D (Short-filament thermocouple, widely used in coating industry)

Piezoresistive Gauge

ZJ-1P: Piezoresistive vacuum gauge, 0.1~100kPa, suitable for near-atmosphere rough vacuum

Capacitance Diaphragm Gauge (Gas-independent, دقة عالية)

ZJ-1C Series (Range options: 10ت, 100ت, 1000ت, 0~1000Pa; 4-20أماه / 0-10إخراج الخامس)

Hot Cathode Ion Gauge (B-A gauge, high vacuum)

ZJ-2

ZJ-10

ZJ-12 (B-A ultra-high vacuum gauge)

ZJ-27 (Wide-range ion gauge, mainstream for coating machines)

Cold Cathode Ion Gauge (Penning / inverted magnetron cold gauge, high vacuum, no filament)

ZJ-14 (Inverted magnetron cold gauge)

ZJ-14C (Penning cold gauge)

3. Single-type Vacuum Indicators (Panel mount for control cabinet)

ZDR Resistance (بيراني) Vacuum Meter

ZDR-I-Pro: Single-channel resistance vacuum meter

ZDR-II-Pro: Dual-channel resistance vacuum meter

ZDR-X-LED: Rack-mount multi-channel resistance vacuum mete

ZDO Thermocouple Vacuum Meter

ZDO-I / ZDO-II: أعزب / dual channel thermocouple vacuum meter

ZDK Hot Cathode Ion Vacuum Meter

ZDK-I-LED, ZDK-X-LED: أعزب / multi-channel ion meter, compatible with ZJ-27/ZJ-

ZDV Cold Cathode Ion Vacuum Meter

ZDV-I-LED, ZDV-IC-LED: Dedicated indicator for cold gauge

PDM Miniature Resistance Vacuum Meter (مدمج, portable all-in-one)

PDM-5203: Panel miniature resistance vacuum meter (match APG, ZJ-52T)

PDM-520B: Handheld miniature vacuum meter (5إمدادات الطاقة V, field portable)

4. ZDF Composite Vacuum Meter (الصناعة السائدة, مقاومة + ion / الحرارية / cold gauge combination, standard for coating machines)

ZDF-I-LED / ZDF-I-PRO: الحرارية + ion composite

ZDF-III-LED / ZDF-III-PRO: مقاومة (ZJ52T) + hot cathode ion (ZJ27), الأكثر شيوعا

ZDF-IV-LED / ZDF-IV-PRO: مقاومة + B-A ultra-high ion gauge (ZJ12)

ZDF-V-LED / ZDF-V-PRO: مقاومة + cold cathode cold gauge (ZJ14)

ZDF-X-LED / ZDF-X-PRO: Dual resistance + single ion

ZDF-IB / ZDF-VB / ZDF-VC: Dual thermocouple, dual resistance cold gauge, dual ion and other special composite versions

5. Automatic Pressure Controller (Vacuum closed-loop pressure stabilization control)

ZDC-I: مقاومة + ion composite pressure controller

ZDRC-I: Resistance pressure controller

ZDMC-I: Capacitance gauge pressure controller

ZDFC-III: Composite vacuum pressure controller

6. ملحقات متطابقة

ZDT-5: Electromagnetic fine-tuning vacuum valve (for pressure controller)

Ceramic sealed vacuum feedthrough electrode (vacuum electrode, vacuum feed wire)

KF/CF flange adapter, gauge cable, dedicated APG RJ45 cable

Quick Selection Reference for BOM

Rough vacuum, PLC acquisition, replace PSG500 → APG-500C / APG-500CC

Indicator display + rough vacuum → ZDR series + ZJ-52T

Standard coating machine composite vacuum (1e5~1e-5Pa) → ZDF-III-PRO + ZJ52T+ZJ27

Ultra-high vacuum → ZDF-IV + ZJ12

Filament-free, long-term high vacuum → ZDF-V + ZJ14C

Gas-independent high-accuracy absolute pressure → ZJ-1C capacitance gauge