S S REGELTECHNIK ESFTF-U Screw In Humidity and Temperature Sensor Instruction Manual
- June 12, 2024
- S S REGELTECHNIK
Table of Contents
S S REGELTECHNIK ESFTF-U Screw In Humidity and Temperature Sensor
Product Information
The product is a screw-in humidity and temperature sensor designed for pressure systems. It can measure various parameters including mixing ratio, relative/absolute humidity, dew point, and temperature. The sensor is calibratable and features multi-range switching and active output. It also comes with a replaceable metal sinter filter for protection.
Product Usage Instructions
- Ensure correct voltage supply: The sensor operates on a voltage supply of 15-36V DC.
- Mounting and Installation: Follow the provided wiring diagram to correctly connect the sensor. Pay attention to the correct wiring and ensure proper grounding.
- Calibration: If required, calibrate the sensor according to the provided instructions.
- Measurement Range: The sensor can measure humidity and temperature within a specific range. The range can be adjusted using the DIP switches on the sensor. Refer to the user manual for the default range and instructions on how to change it.
- Data Output: The sensor provides output signals for humidity and temperature. The output can be either 4-20 mA or 0-10V, depending on the selected variant. Connect the output signals to the appropriate devices or systems.
- Display (Optional): If equipped with an LCD display, the sensor can provide visual information regarding the measured parameters. Refer to the user manual for the display’s part number and additional instructions.
Note: For detailed installation and operational instructions, refer to the complete user manual provided with the product.
Screw-in humidity and temperature sensor for pressure systems, mixing ratio, relative/absolute humidity, dew point and temperature, calibratable, with multi-range switching and active output
Introduction
- Calibratable screw-in sensor HYGRASGARD® ESFTF in a housing made of impact-resistant plastic with quick-locking screws, with cable gland (optional M12 connector as per DIN EN 61076-2-101), duct tube with thread (G1/2“) and metal sinter filter (replaceable).
- The sensor is used for detecting the relative humidity (0…100 % RH) and the temperature (4 switchable measuring ranges) in compressed air lines up to max. 10 bar. The measuring transducer converts the measured values into a standard signal of 4…20 mA or 0 – 10 V. Further parameters are calculated internally from the measured values, that are retrievable via the humidity output: absolute humidity, mixing ratio, and dew point temperature (can be changed via DIP switch).
- Furthermore, the unit boasts a sensor protection function for high humidity (95…99 % RH).
- The measuring element is heated automatically in the critical range and thus protected against condensation.
- The sensor is factory-calibrated; an environmental precision adjustment by an expert is possible.
- It must be installed vertically with the humidity sensor pointing downwards.
TECHNICAL DATA
Wiring Diagram
Installation and Commissioning
SUPPLY VOLTAGE
- For operating voltage reverse polarity protection, a one-way rectifier or reverse polarity protection diode is integrated in this device variant.
- This internal one-way rectifier on AC supply voltage.
- The output signal is to be tapped by a measuring instrument. The output signal is measured her against zero potential (O V) of the input voltage!
- When this device is operated on DC supply voltage, the operating voltage input UB+ is to be used for 15…36 V DC supply and UB – or GND for ground wire!
- When several devices are supplied by one 24 V AC voltage supply, it is to be ensured that all ”positive“ operating voltage input terminals (+) of the field devices are connected with each other and all ”negative“ operating voltage input terminals (–) (= reference potential) are connected together (in-phase connection of field devices). All outputs of field devices must be referenced to the same potential!
- In case of reversed polarity at one field device, a supply voltage short-circuit would be caused by that device. The consequential short-circuit current flowing through this field device may cause damage to it.
Therefore, pay attention to correct wiring!
Dimensional drawing
Mounting diagram
© Copyright by S+S Regeltechnik GmbH
Reprint in full or in parts requires permission from S+S Regeltechnik GmbH.
Subject to errors and technical changes. All statements and data herein represent our best knowledge at date of publication. They are only meant to inform about our products and their application potential, but do not imply any warranty as to certain product characteristics. Since the devices are used under a wide range of different conditions and loads beyond our control, their particular suitability must be verified by each customer and/or end user themselves. Existing property rights must be observed. We warrant the faultless quality of our products as stated in our General Terms and Conditions.