Calculator
CF-51
Product categories
Heat / Cooling
Calculator
Heat / Cooling
System technology
Smart Building
Your benefits
- Big display:
Easy to read - Universal applicable:
- Wall-mounted model (Volume measuring meter UNICO® and MTW)
- Different power supply possibilities - Option cards for diverse functionalities:
- Economical basic device
- Additional functionalities feasible
Applications
- Metering of heat and/or cooling consumption in building management
- Calculator for local or remote reading
Options
- Special version for combined heat/cold measurements (special programming)
- Option cards for:
- M-Bus / 2 water meter inputs
- M-Bus / 2 pulse outputs
- M-Bus Power / 2 water meter inputs
- LonWorks, FTT-10A / 2 water meter inputs (separate supply 24 V AC/DC necessary)
- Modbus RTU (RS485) / 2 water meters inputs (Power supply module 230 V AC necessary)
Downloads
Properties
- Electronic calculator
- LCD-resolution 7 digits
- Non-volatile memory EEPROM
- Temperature measuring range 0 - 180 °C
- Temperature sensor Pt 100 (2-wires)
- Standard EN 1434
- 24 month register
- Supply via 12-year battery, mains or M-Bus (pay attention to versions)
- Maximum values with time stamp
- Combinable with following volume measuring meters:
- Mechanical impeller meters with Reed-pulser
- MID 
Conformity according European Measuring Instruments Directive (MID)
Product information
Dimension Diagram
Technical Data
| Technical data calculator CF-51 | |
|---|---|
| Temperature measuring range | 0 to 180 °C |
| Temperature difference | 3 to 160 K |
| Temperature resolution on display | 0,1 °C |
| LCD resolution | 7 digits |
| Max. display resolution | 9'999'999 |
| Indication device energy | MWh |
| Indication device volume | m3 |
| Indication device flow | m3/h |
| Indication device power | kW |
| Protection class | IP64 acc. DIN 40050 |
| Environment class | C acc. EN 1434 |
| Environment temperature | +5 to +55 °C (intern installation) |
| Storage temperature | -10 bis +60 °C |
| EMV | protected acc. DIN EN 50081-1/2, DIN EN 50082-1/2 |
| Double insulation | Protection class II acc. CEI 60364-4-443 |
| Power supply | |
|---|---|
| Lithium battery | 2 x 3,6 V-AA (lifetime up to 12 years) |
| Mains supply | 230 V +10%/-15%, 50 Hz +/-2%, max. 1 VA |
| Supply via M-Bus (option card) | at M-Bus EN 1434-3 max. 2 M-Bus standard loads (2x1,5 mA) |
| Maximum values | |
|---|---|
| Parameter | Power, flow and inlet temperature (monthly maximum value on display with time stamp) |
| Period for averaging | 15 min |
| Internal memory | 24 month maximum values |
| Inputs from volume measuring meter | |
|---|---|
| Signal | Reed contact, Open collector, Open drain or static contactor |
| Pulse frequency | max. 16 Hz |
| Resistore Ron/Roff | ≤150 Ω / ≥ 2 MΩ |
| Cable diameter | 3.75 +/-0,75 mm |
| Wire cross-section | 0,2 ... 1,5 mm2 |
| Option card M-Bus / 2 water meter inputs | |
|---|---|
| M-Bus standard load | 1 standard load = 1,5 mA power consumption |
| Protocol | M-Bus according EN 1434-3 |
| Standard transmission rate | 2400 baud |
| Pulse input | Characteristics according EN 1434-2 - 7.1.5 class IC |
| Pulser | Reed contact, Open collector, Open drain or static contactor |
| Frequency | max. 5 Hz |
| Pulse length | min. 100 ms |
| Resistore Ron | max. 10 kΩ |
| Max. cable length | 10 m |
| Pulse value | 1 - 250 l/imp. (programmable, standard 10 l) |
| Option card M-Bus / 2 pulse outputs | |
|---|---|
| Heat energy | Output: Heat energy + volume |
| Heat and cooling energy | Output: Heat and cooling energy |
| M-Bus standard load | 1 standard load = 1,5 mA power consumption |
| Protocol | M-Bus according EN 1434-3 |
| Standard transmission rate | 2400 baud |
| Pulse output | Characteristics according EN 1434-2 - 7.1.3 class OA |
| Pulser | galvanically separated optocoupler, bi-polar output |
| Output frequency | max. 2 Hz |
| Pulse length | 250 ms +/- 8% |
| Resistore Ron | max. 20 Ω |
| Pulse value | According to the smallest digit on the display |
| Option card M-Bus Power / 2 water meter inputs | |
|---|---|
| M-Bus standard load | 2 standard loads = 3 mA power consumption |
| Protocol | M-Bus according EN 1434-3 |
| Standard transmission rate | 2400 Baud |
| Pulse input | Characteristics according EN 1434-2 - 7.1.5 class IC |
| Pulser | Reed contact, Open collector, Open drain or static contactor |
| Frequency | max. 5 Hz |
| Pulse length | min. 100 ms |
| Resistore Ron | max. 10 kΩ |
| Max. cable length | 10 m |
| Pulse value | 1 - 250 l/imp. (programmable, standard 10 l) |
| Option card LonWorks / 2 water meter inputs | |
|---|---|
| Protocol | LonTalk® |
| Power supply | 24 V AC/DC |
| Power input | 1 VA |
| Pulse input | Characteristics according EN 1434-2 - 7.1.5. Klasse IC |
| Pulser | Reed contact, Open collector, Open drain or static contactor |
| Pulse length | min. 100 ms |
| Resistore Ron | max. 10 kΩ |
| Max. cable length | 10 m |
| Pulse value | 1 - 250 l/imp. (programmable, standard 10 l) |
| Temperature sensor | |
|---|---|
| Temperature sensor | Pt 100 (2-wires) |