Flow computers
FP40
FP40 is a compact flow and thermal energy meter for steam, water and other industrial media. It serves as a thermal energy calculator for media balancing and consumption monitoring, supporting one or two measurement systems.
Two module slots allow digital readings via HART and Modbus RTU to be combined with analogue signals from resistance temperature sensors, flow meters and pressure transmitters with current outputs, adapting the device to the installation’s requirements.
The device records results and displays them on a 4-inch touchscreen. Ethernet with Modbus TCP, RS-485 with Modbus RTU and a built-in web server provide communication with supervisory systems and remote access to data.
FP40 – modular flow and thermal energy meter
FP40 is a compact thermal energy meter and flow calculator for industrial steam, water, technical gas and other liquid applications. It combines media balancing, energy consumption monitoring and data recording in a single device. It supports one or two measurement systems.
Modular design – HART, Modbus RTU and analogue measurements
Two module slots allow the inputs to be selected to suit the installation. FP40 can combine digital readings via HART or Modbus RTU with analogue signals from resistance temperature sensors, flow meters and pressure transmitters with current outputs. HART and Modbus RTU modules can also be used together, or a single module can be installed.
This makes FP40 suitable as a thermal energy calculator for use with a HART or Modbus RTU flow meter, as well as in installations using conventional analogue signals. Its compact panel-mount enclosure facilitates installation where space is limited.
Thermal energy measurement for steam, water and other media
FP40 calculates compensated flow and thermal energy for saturated steam, superheated steam and water in accordance with IAPWS-IF97 recommendations. It supports steam–condensate systems, including installations with partial condensate return.
The calculator can also be used in systems containing glycol, chilled water and thermal oils, and for technical gas flow measurements.
Compatibility with flow meters and differential pressure flow elements
FP40 works with mass, volumetric and differential pressure flow meters. In systems using a differential pressure flow element, it calculates flow from the differential pressure signal using a square-root characteristic or — for water and steam — an algorithm compliant with EN ISO 5167.
Operation and data recording
A 4-inch colour touchscreen displays measurement results and a graphical diagram of the measurement system. The 2 GB internal memory provides data storage, while USB and Ethernet ports allow recorded results to be retrieved.
Additional measurements and calculations can be handled in 16 auxiliary channels. Alarm functions, relay outputs and email notifications support installation monitoring.
Integration with supervisory systems
Ethernet with Modbus TCP and RS-485 with Modbus RTU allow FP40 to be integrated into industrial monitoring and automation systems. A built-in web server provides remote access to data through a browser.
| Front panel | |
| Type of display | LCD TFT 4” 800 px X 480 px LED backlight |
| Display size | 86.4 mm X 52.5 mm |
| Keyboard | resistive touch panel |
| Additional indication | LED RGB |
| USB Port – front panel | |
| Version | USB 2.0 (with limited functionality, for connection of FLASH storage) |
| Connector type | USB standard ‘A’ type socket |
| Ethernet Port – rear panel | |
| Interface | 10/100 Base-T Ethernet |
| Connector type | RJ-45 |
| Transmission protocol | Server WWW, Modbus TCP Client/Server ICMP (ping) |
| Modbus TCP Client | |
| Number of connections opened simultaneously | Max 20 |
| Number of read values | Max 30 |
| Modbus TCP Server | |
| Number of connections opened simultaneously | Max 4 |
| RS-485 Serial Port – rear panel | |
| Signals output on terminal block | A(+), B(-) |
| Galvanic separation | None |
| Maximum load | 32 receivers/transmitters |
| Transmission protocol | Modbus RTU Slave |
| Transmission rate | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbps |
| Parity control | Even, Odd, None |
| Frame | 1 start bit, 8 data bits, 1 stop bit |
| Maximum length of line | 1200 m |
| Internal terminating resistor | Vcc-A(+)-B(-)-G: 390 Ω – 220 Ω – 390 Ω (activated by DIP-switches) |
| Maximum differntial voltage A(+), B(-) | -7 V .. +12 V |
| Minimum output signal of transmitter | 1.5 V (at RL= 54 W) |
| Minimum sensitivity of receiver | 200 mV / RIN= 12 kW |
| Minimum impedance of data transmission line | 54 W |
| Short-circuit/thermal protection | Yes/Yes |
| Internal data memory | |
| Memory type | Flash |
| Capacity | 32 GB |
| Estimated recording time for recording speed every 5 s for 16 measuring channels | ca. 10 years |
| Supply | |
| Supply voltage | 24 VDC (20 .. 30 VDC) |
| Maximum power consumption | 12 W |
| Security | The internal delay fuse 3.15 A, the exchange only by the service company |
| Electrical connections (terminal connectors) | |
| Type | screw terminal connectors |
| Wire cross section | solid and flexible: 0.14 .. 1.5 mm2 flexible with bootlace ferrule 0.25 .. 1.5 mm2 AWG 30 / 14 |
| Mechanical Dimensions – Housing | |
| Type of housing | panel mount, nonflammable plastic material „Noryl” |
| Dimensions with connectors (w X h w X d) | 144 mm X 72 mm X 127 mm |
| Dimensions of panel cut-out (w X h) | 138+1 mm X 68+0.7 mm |
| Maximum panel thickness | 5 mm |
| Weight | 0.5 kg |
| Protection class | IP30 on front panel side IP20 on rear panel side |
| Environmental conditions | |
| Ambient temperature | 0 .. +50 °C or 0 .. +40 °C depends on the device hardware configuration(1) |
| Relative humidity | 5 .. 95% (without steam condensation) |
| Maximum altitude | < 2000 m above sea level |
| Storage temperature | -30 .. +70 °C |
| Degree of pollution | PD2 |
| EMC | EMC Directive 2014/30/EU EN 61326-1:2013 Table 2 (immunity) EN 61326-1:2013 Class A (emission) |
| RoHS | RoHS Directive 2011/65/EU |
| (1)If module IN6I(24V) or 2RS485(24V) installed and operating as a power supply source for external devices, ambient temperature is limited to 0 .. +40 °C. In all other configurations the ambient temperature range is 0 .. +50 °C. | |
| Analog output 4-20mA | |
| Output signal | 4-20 mA (3.6 .. 22 mA) |
| Current loop supply | no (external supply required) |
| Maximum voltage between I+ and I- | 28 VDC |
| Minimum supply current loop voltage | 9 VDC (RL = 0 Ω) |
| Loop resistance (RL) | 0 .. 500 Ω |
| Galvanic isolation to supply voltage | 250 VAC; 1500 VAC for 1 minute |
| Relay outputs | |
| Number of outputs | 4 |
| Outputs type | Solid state relays |
| Maximum voltage | 60 V AC/DC |
| Maximum load current | 0.1 A |
FP40 – modular flow and thermal energy meter
FP40 is a compact thermal energy meter and flow calculator for industrial steam, water, technical gas and other liquid applications. It combines media balancing, energy consumption monitoring and data recording in a single device. It supports one or two measurement systems.
Modular design – HART, Modbus RTU and analogue measurements
Two module slots allow the inputs to be selected to suit the installation. FP40 can combine digital readings via HART or Modbus RTU with analogue signals from resistance temperature sensors, flow meters and pressure transmitters with current outputs. HART and Modbus RTU modules can also be used together, or a single module can be installed.
This makes FP40 suitable as a thermal energy calculator for use with a HART or Modbus RTU flow meter, as well as in installations using conventional analogue signals. Its compact panel-mount enclosure facilitates installation where space is limited.
Thermal energy measurement for steam, water and other media
FP40 calculates compensated flow and thermal energy for saturated steam, superheated steam and water in accordance with IAPWS-IF97 recommendations. It supports steam–condensate systems, including installations with partial condensate return.
The calculator can also be used in systems containing glycol, chilled water and thermal oils, and for technical gas flow measurements.
Compatibility with flow meters and differential pressure flow elements
FP40 works with mass, volumetric and differential pressure flow meters. In systems using a differential pressure flow element, it calculates flow from the differential pressure signal using a square-root characteristic or — for water and steam — an algorithm compliant with EN ISO 5167.
Operation and data recording
A 4-inch colour touchscreen displays measurement results and a graphical diagram of the measurement system. The 2 GB internal memory provides data storage, while USB and Ethernet ports allow recorded results to be retrieved.
Additional measurements and calculations can be handled in 16 auxiliary channels. Alarm functions, relay outputs and email notifications support installation monitoring.
Integration with supervisory systems
Ethernet with Modbus TCP and RS-485 with Modbus RTU allow FP40 to be integrated into industrial monitoring and automation systems. A built-in web server provides remote access to data through a browser.
| Front panel | |
| Type of display | LCD TFT 4” 800 px X 480 px LED backlight |
| Display size | 86.4 mm X 52.5 mm |
| Keyboard | resistive touch panel |
| Additional indication | LED RGB |
| USB Port – front panel | |
| Version | USB 2.0 (with limited functionality, for connection of FLASH storage) |
| Connector type | USB standard ‘A’ type socket |
| Ethernet Port – rear panel | |
| Interface | 10/100 Base-T Ethernet |
| Connector type | RJ-45 |
| Transmission protocol | Server WWW, Modbus TCP Client/Server ICMP (ping) |
| Modbus TCP Client | |
| Number of connections opened simultaneously | Max 20 |
| Number of read values | Max 30 |
| Modbus TCP Server | |
| Number of connections opened simultaneously | Max 4 |
| RS-485 Serial Port – rear panel | |
| Signals output on terminal block | A(+), B(-) |
| Galvanic separation | None |
| Maximum load | 32 receivers/transmitters |
| Transmission protocol | Modbus RTU Slave |
| Transmission rate | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbps |
| Parity control | Even, Odd, None |
| Frame | 1 start bit, 8 data bits, 1 stop bit |
| Maximum length of line | 1200 m |
| Internal terminating resistor | Vcc-A(+)-B(-)-G: 390 Ω – 220 Ω – 390 Ω (activated by DIP-switches) |
| Maximum differntial voltage A(+), B(-) | -7 V .. +12 V |
| Minimum output signal of transmitter | 1.5 V (at RL= 54 W) |
| Minimum sensitivity of receiver | 200 mV / RIN= 12 kW |
| Minimum impedance of data transmission line | 54 W |
| Short-circuit/thermal protection | Yes/Yes |
| Internal data memory | |
| Memory type | Flash |
| Capacity | 32 GB |
| Estimated recording time for recording speed every 5 s for 16 measuring channels | ca. 10 years |
| Supply | |
| Supply voltage | 24 VDC (20 .. 30 VDC) |
| Maximum power consumption | 12 W |
| Security | The internal delay fuse 3.15 A, the exchange only by the service company |
| Electrical connections (terminal connectors) | |
| Type | screw terminal connectors |
| Wire cross section | solid and flexible: 0.14 .. 1.5 mm2 flexible with bootlace ferrule 0.25 .. 1.5 mm2 AWG 30 / 14 |
| Mechanical Dimensions – Housing | |
| Type of housing | panel mount, nonflammable plastic material „Noryl” |
| Dimensions with connectors (w X h w X d) | 144 mm X 72 mm X 127 mm |
| Dimensions of panel cut-out (w X h) | 138+1 mm X 68+0.7 mm |
| Maximum panel thickness | 5 mm |
| Weight | 0.5 kg |
| Protection class | IP30 on front panel side IP20 on rear panel side |
| Environmental conditions | |
| Ambient temperature | 0 .. +50 °C or 0 .. +40 °C depends on the device hardware configuration(1) |
| Relative humidity | 5 .. 95% (without steam condensation) |
| Maximum altitude | < 2000 m above sea level |
| Storage temperature | -30 .. +70 °C |
| Degree of pollution | PD2 |
| EMC | EMC Directive 2014/30/EU EN 61326-1:2013 Table 2 (immunity) EN 61326-1:2013 Class A (emission) |
| RoHS | RoHS Directive 2011/65/EU |
| (1)If module IN6I(24V) or 2RS485(24V) installed and operating as a power supply source for external devices, ambient temperature is limited to 0 .. +40 °C. In all other configurations the ambient temperature range is 0 .. +50 °C. | |
| Analog output 4-20mA | |
| Output signal | 4-20 mA (3.6 .. 22 mA) |
| Current loop supply | no (external supply required) |
| Maximum voltage between I+ and I- | 28 VDC |
| Minimum supply current loop voltage | 9 VDC (RL = 0 Ω) |
| Loop resistance (RL) | 0 .. 500 Ω |
| Galvanic isolation to supply voltage | 250 VAC; 1500 VAC for 1 minute |
| Relay outputs | |
| Number of outputs | 4 |
| Outputs type | Solid state relays |
| Maximum voltage | 60 V AC/DC |
| Maximum load current | 0.1 A |