Panametrics HydroProII, Руководство пользователя

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HygroPro
II
User's Manual 37
Chapter 4. Specifications
Chapter 4. Specifications
4.1 General
Dew Point/Frost Point Calibration Range
• –80°C to + 10°C (–112°F to 50°F) standard with data from –110°C to + 20°C (–166°F to 68°F)
Operating/Storage Temperature
• –20°C to 60°C (–4°F to 140°F) operating temperature
• –20°C to 60°C (–4°F to 140°F) process temperature
• –40°C to 70°C (–40°F to 158°F) storage temperature
Warm-Up Time
• Meets specified accuracy within three minutes after initial power up
Calibrated Accuracy (Dew/Frost Point)
• ±3.6°F (±2°C) above -148°F (-100°C)
• ±5.4°F (±3°C) below -148°F (-100°C)
Repeatability (Dew/Frost Point)
• ±0.4°F (±0.2°C) above -148°F (-100°C)
• ±0.9°F (±0.5°C) below -148°F (-100°C)
Response Time
• Wet up time: -80°C DP (0.5 PPMv) to -15°C DP (1500 PPMv) in under 4 minutes
• Dry down time: Dry down response is a function of how wet the probe has become and for how long. Regardless
of its starting and final Dew Point, 63% of a dry down step change will happen in under 10 seconds.
4.2 Electrical
Power
•
Input: 12 to 28 VDC (loop-powered, customer supplied)
• Outputs: 4 to 20 mA analog, HART and RS-485 digital
•
Output Resolution: 0.01 mA/12 bits
• Maximum Load Resistance: RL = (PSV x 33.33) – 300, where PSV = Power Supply Voltage
Example: Given a 24 VDC Power Supply, Max. Load Resistance = (24 X 33.33) – 300 = 500
Ω
•
Cable: Shielded 4-conductor 6 ft. (2 m) and 30 ft. (10 m), standard (consult Panametrics for custom lengths)
Input Parameters for Loop-Powered Intrinsic Safety
:
Loop Power Supply
U
i
= 28 V P
i
= 0.7 W L
i
= 0 µH
I
i
= 100 mA C
i
= 0 µF
RS-485 Digital Output
U
i
= 4.0 V P
i
= 250 mW L
i
= 0 µH
I
i
= 250 mA C
i
= 0 µF