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TFL 611 Continuous Frost Monitor
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Product Description
Demand-controlled, large-area monitoring of system components with active capillary sensor.
Features
- Detects the lowest temperature that occurs for a length of at least 250 mm at any position along the capillary tube
- Used on air side in ventilation and air conditioning units where protective measures must be taken against freezing
- Active capillary sensor for measuring the lowest temperatures in the range 0...15 °C
- Vapour-filled capillary tube and diaphragm system with inductive system of measurement
- Setting range 1...10 °C
- Start-up function
- LED and 7-segment display
- Self-monitoring of sensor line
Technical Details
| Power Supply | |
| Power supply | 24 V~, 10/-20% |
| Power consumption | < 6.6 VA |
| Frequency | 50...60 Hz |
| Parameters | |
| Measuring range | 0...15 °C |
| Setting range | 1...10 °C |
| Adjustment point | 5 °C |
| Accuracy for adjustment point | ± 1 K |
| Switching difference | Approx. 2 K |
| Temperature for capillary tube | < 110 °C |
| Time constant in still air | Approx. 90 s |
| Time constant in moving air | < 40 s |
| Response length for capillary tube | Min 250 mm |
| Inputs/Outputs | |
| Admissible cable length | 300 m with 1.5 mm² |
| Analogue input - Valve control for terminal Y | 0...10 V |
| Analogue input - Current | < 0.1 mA |
| Analogue outputs - Sensor temperature for terminal B | 0...10 V ≙ 0...15 °C |
| Analogue outputs - Valve control for terminal Y10 | 0...10 V |
| Analogue outputs - Current | ±1 mA |
| Potential-free relay outputs (Q terminals) - Min. switching capacity | 12 V~/=, 100 mA |
| Potential-free relay outputs (Q terminals) - Max. switching capacity | 250 V~, 6(2) A; 24 V=, 6 A |
Overview
| Type | Description | Weight |
| TFL611F201 | Continuous frost monitor; 0...15 °C; capillary tube length= 2m | 0.34 kg |
| TFL611F601 | Continuous frost monitor; 0...15 °C; capillary tube length= 6m | 0.41 kg |