Approval

MID approved in accordance with energy meter EN 1434 and PTB K7.2 (German national cooling approval)

Approved temperature range

• Heating

0 … 180 °C (32 … 356 °F)

• Cooling

0 … 105 °C (32 … 221 °F)

Absolute temperature range

-20 … +190 °C (-4 … -374 °F)

Differential temperature

• Heating

3 … 177 K (starting at 0.1 K)

• Cooling

3 … 102 K

Measuring accuracy

Meets requirements of EN 1434
Typically max. ± (0.5 + 3 K/??) [%] of measured value

Measuring rates

• Battery type D-cell

Volume: 1 s, temperature: 4 s

• Mains versions

Volume: 1/8 s, temperature: 2 s

Flow range

Depends on pulse input value (IN0), see “Selection and Ordering data”

Power range value

Depends on pulse input value as follows:

Pulste input value (I/P or gal/P)

Max power [kW]

1

15000

2.5

15000

5

15000

10

150000

25

150000

50

150000

100

1500000

250 *)

1500000

500 *)

1500000

1000 *)

15000000

*) not available for gal/pulse

User interface (always included)

Display

8-digit LCD display with associated pictograms/symbols

Units

MWh, GJ, Gcal, MBtu, m³, m³/h, GPM, gal, °C, °F, kW, MBtu/h (gal is shown with factor x 100)

Totalizer value range

99 999 999 or 9 999 999.9 (0 and 1 digit after comma). Display digits: Flow in 6 digits; Volume, power and energy in 8 digits

Values

Power, energy, volume, flow rate, temperatures

Push button

Single push button for the menu controlling

Optical interface IrDA interface

ZVEI optical interface with M-Bus protocol as per EN 1434, connection via separate IrDA-adapter
baud rate: 300 or 2400

Rated operation conditions

Enclosure

IP54 in accordance with IEC 529

Material

• Housing

C Lexan 141R (or similar); colors: light gray (top part) and black (bottom part)

• Pipe/wall fitting

PA 6,6 GF25 (or similar)

• Other plastic parts

ABS Cycolac GPM500 (or similar)

• Gaskets

Neoprene and rubber cable bushings: EPDM 50

• Rubber cable bushings

EPDM 50

Temperature

• Ambient

5 … 55 °C (41 … 131 °F)

• Storage

-25 … +70 °C (-13 … +158 °F)
Relative ambient humidity < 93 %

Environment class

• Mechanic class

M1/M2

• Electromagnetis class

E1/E2 (MID) or C (DIN EN 1434)

Temperature input (always included)

Function

The temperature sensors must be connected to terminals 1-5 and 6-2 (T_H) and 3-7 and 8-4 (T_C) depending on cable type (2-wire or 4-wire).

Temperature range
Absolute measuring range

-20 … 190 °C (-4 … 374 °F) for T_H and T_C

Temperature difference

Start 0.1 K, min. 3 K, max. 177 K

Measurement cut-off

0.125 K

Display resolution

T_H and T_C: 0.1 K
?T: 0.1 K
16-bit digital resolution AD converter

Sensor types

Pt100 or Pt500 as 2-wire or 4-wire; Standard is Pt500.
Sensor cable length: up to 10 m (according EN 1434 and MID-type approval).

Sensor connection

4-wire or 2-wire; auto detection of connection version

Flow input (IN0)
(always included)

Function

Used as standard for flow input of the external flowmeter. The input is marked as 10 (+ Flow Pulse),
11 (- Gnd) on the terminal strip.

Note: The pulse input value selection must be the same as the pulse output setting of the flowmeter.

Pulse value

1 … 1000 l/pulse or 1 … 100 gal/pulse, selection by corresponding order code. Will be shown at the device label

Pulse frequency

? 100 Hz (200 Hz)

Pulse ON-time

? 3 ms

Pulse OFF-time

? 2 ms

Type

Active pulse input

Terminal voltage

3.6 V DC (supplied internally by FUE950)

Flowmeter installation place

The flowmeter installation place can be in the hot line or cold line (“forward or return pipe”) selected by corresponding order code. The “installation place” will be shown at the device display and nameplate

Connected cable

Max. 10 m (shielded cables are highly recommended)

Ports for option modules

Type

The calculator features 2 ports for optional plug-in modules.

Function modules (Port 1 or 2)

• Pulse input module, 2 inputs (In1, In2)
• Pulse output module, 2 outputs (Out1, Out2)
• Combination module of 2 inputs (In1, In2) and 1 output (Out1)

Current output module (Port 1)

2 passive 4 ... 20 mA (#1, #2) (occupies both port 1 and 2)

Communication modules (Port 1 or 2)

M-Bus, RS 232 or RS 485 (M-Bus protocol, according EN 1434-3)

Pulse output

Function

The module contains connections for 2 pulse outputs, which can be programmed as desired using a software tool. The pulse outputs are marked as standard as O1, 'gnd' and O2, 'gnd' on the terminal strip and Out1 respectively Out2 in the display.

Type

Passive "open collector" pulse output, outputs potential isolated to each other

Pulse value

Last significant digits of the display (unit/pulse), selection by corresponding order code and setting can be read via display menu, settings changeable via software tool

Pulse output 1

• Pulse frequency

? 4 Hz

• Pulse width

125 ms ± 10 %

• Pulse duration

125 ms ± 10 %

• Pulse break

? 125 ms -10 %

Pulse output 2

• Pulse frequency

? 100 Hz, depending on the selected pulse length

• Ratio

Pulse duration/pulse break ~ 1:1

Pulse length

5, 10, 50, 100 ms (default: 5 ms)

External voltage supply

3 … 30 V DC

Current

? 20 mA with a residual voltage of ? 0.5 V

Possible pulse output selection

• Energy (default setting for 'Out1')
• Volume (default setting for 'Out2')
• Tariff energy 1
• Tariff energy 2
• Tariff condition 1 (limit switch)
• Tariff condition 2 (limit switch)
• Energy error
• Volume error
• Volume with specific display resolution (or with factor 0,1, 10 or 100 thereof)
• Energy with specific display resolution (or factor 0.1 thereof)

Pulse input

Function

Add-on module for two additional counters. The pulse input 1 is marked as I1, 'gnd' and the input 2 as I2, 'gnd' on the terminal strip and indicated in the display as separate registers IN1 and IN2 and can also be transferred via the communication modules.

Type

Passive "open collector" pulse inputs, outputs not potential isolated to each other, data are separate cumulated in different registers and are also stored on the two accounting day's.

Pulse value

Pulse value and the unit are configurable for energy, water, gas or electrical meter by a software tool

Default: Pulse input 0.1 m3 or 1 gal (if unit 'gal' is ordered with the Z-option "L05")

Pulse frequency

? 8 Hz

Pulse length

? 10 ms

External voltage supply

3 V DC (supplied internally by FUE950)

Current

based on R_i = 2.2 M?

Cable length

< 10 m connection limit

Current output module

Function

The module contains connections for 2 passive current outputs, which can be programmed individually using the software tool. The outputs are marked „#1“ and „#2“ with corresponding polarity „+“ and „-“ on the terminal strip.

The module will be connected on port 1 only, but both ports are occupied by the module.

Terminal voltage

External supply: 10 … 30 V DC (passive output)

Signal range

4 … 20 mA; 4 mA = 0 value and 20 mA = default maximum values (for #1: Power in kW and for #2: Flow with the max. values and selected unit).

Defaults:

For power it is the max. selectable value x 100 000 the last digit of display (e. g. 20 mA = 10 000.0 kW (1 digit res.) or 100 000 kW (0 digit res).

For flow it is the max. selectable value x 10 000 the last digit of display (e. g. 20 mA = 1 000.0 m³/h (1 digit res.) or 10 000 m³/h (0 digit res.).

Load

Max. 800 ?

Upper limit

Up to 20.5 mA (exceed causes the error current value)

Signal on alarm

Errors are indicated with 3.5 mA or 22.6 mA (programmable, default: 3.5 mA)

Output values

Power, flow, temperature (configuring via software tool; default: for #1: Power and for #2: Flow)

M-Bus output

Type

The optional M-Bus plug-in module is a serial interface for communication with external devices (M-Bus Repeater)

Protocol

M-Bus according EN 1434-3

Connection

The connection is not polarity-conscious and is electrically isolated, connection of 2 x max. 2.5 mm² wires, 300 or 2400 baud (auto baud detection), current drawn: one M-Bus load.

M-Bus address:
Each port has its own primary M-Bus address (Prim1 = the last two digits of the serial number; Prim2 = 0).

The secondary address is unique for each calculator and is factory-set to equal the serial number.

RS 232 output

Type

The optional module RS 232 is a serial interface for data transmission with external devices, e.g. PC; baud rate: 300 or 2400. The module contains a 3-pole terminal strip with terminals marked 62 (TX), 63 (RX) and 64 (GND). For this purpose a special data cable is necessary.

Protocol

M-Bus according EN 1434-3

Connection

The module contains a 3-pole terminal strip with terminals marked 62, 63, 64 (max. 2.5 mm²); Connected cable length: max 10 m;

For communication with a PC a special adapter cable is required (order no. A5E02611774).

RS 485 output

Function

The optional RS 485 module is a serial interface for data transmission with external devices, e.g. PC; baud rate: 2400. The module contains a 4-pole terminal strip with terminals marked D+, D-, Vcc and GND.

Protocol

M-Bus protocol according EN 1434-3

Connection

Terminals D+ and D-; electrically isolated; 2400 baud only.

An external supply of 12 V DC ± 5 V (<5 W) is needed for the module (terminals Vcc and GND). The module terminals are max. for 2.5 mm² wires. Connected cable length: max. 10 m

Power consumption

230 V and 24 V versions

Typical current appr. 0.15 VA

3.6 V D-cell battery

Typical battery lifetime 10 years under normal conditions (no add-on modules, max. 40 °C ambient temperature)

Supply data

Internal voltage 3.6 V by the battery or plug-in power supply module

Battery, 3.6 V type (option)

3.6 V lithium D-cell, battery lifetime typically 16 years with independently powered flowmeter

230 V AC module (option)

Plug-in module for 230 V AC (195 ... 253 V AC), 50/60 Hz (incl. battery backup)

24 V AC module (option)

Plug-in module for 24 V AC (12 ... 30 V AC) (incl. battery backup)

Battery backup (option)

Only with mains supply modules by internal 3.0 V lithium battery (type CR 2032)
Displayed values, date and time are still updated, but the measuring functions have stopped, including the flow rate measurement. Communication via optional modules M-Bus, RS 485, RS 232 or optical interface is maintained, affecting the backup battery lifetime.