This article is about general and technical requirements for Continuous Level Transmitters used in Integrated Automation System or Building Automation System.
CONTINUOUS LEVEL TRANSMITTERS TECHNICAL REQUIREMENTS FOR IAS
CONTINUOUS LEVEL TRANSMITTERS <Modify as required to match project design>
- Capacitance Type:
- General: Provide a loop powered, continuous capacitance type level transmitter with adjustable span and zero
- Output: 4-20 mA
- Probe: Fluoropolymer coated stainless steel rod or cable. Provide cable probe with end attachment hardware or weight
- Electrical Enclosure: NEMA 4, 7
- Approvals: UL or CSA
- Accuracy: +/- 1 percent of calibrated span
- Process Connection: MPT or ANSI Flange as required
- Acceptable Manufacturers: <Confirm list>
- Honeywell
- Endress & Hauser
- Drexelbrook
- Approved equal
- Hydrostatic Pressure:
- General: Two wire smart d/p cell type transmitter
- Output: 4-20 mA or 1 to 5 volt user selectable linear or square root output
- Range: Adjustable span and zero
- Probe: Stainless steel wetted parts
- Environmental Limits: –40 to 250 degrees F (-40 to 121 degrees C), 0 to 100% RH
- Accuracy: Less than 0.1 percent of span
- Output Damping: Time constant user selectable from 0 to 36 seconds
- Vibration Effect: Less than +/- 0.1 percent of upper range limit from 15 to 2000 Hz in any axis relative to pipe mounted process conditions
- Electrical Enclosure: NEMA 4, 4X, 7, 9
- Approvals: FM, CSA
- Acceptable Manufacturers: <Confirm list>
- Rosemount Inc. 3051 Series
- Foxboro
- Johnson-Yokagawa
- Approved equal
OUTDOOR AIR STATIC PRESSURE SENSING TIP <Modify as required to match project design>
-
- Pressure Sensor: Pressure sensing tip shall be designed to minimize the effects of wind and resulting velocity pressure up to 80 mph. <Acceptable manufacturers shall be Dwyer A-306.>
- Low Air Pressure Surge Dampener: 30-second time constant. <Acceptable manufacturer shall be Modus SD030.>
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