Technical data - Data Sheet - WFK636.D080 - WFK636.D08C - WFK636.D110 - WFK636.D11C - WFW636.D080 - WFW636.D08C - WFW636.D110 - WFW636.D11C

WFK636.., WFW636.., WMK636.., WMW636.. Electronic water meters Data Sheet

Product Family
Content Language: English
Content Type: Technical Documentation > Data Sheet for Product
Product Version
Document No: A6V12128928_en--_c
Download ID: A6V12368284
Stock No.: S55560-F116; S55560-F117; S55560-F118; S55560-F119; S55560-F120; S55560-F121; S55560-F122; S55560-F123
Product No.: WFK636.D080; WFK636.D08C; WFK636.D110; WFK636.D11C; WFW636.D080; WFW636.D08C; WFW636.D110; WFW636.D11C
Access level: Internet
File Type: html

Technical data

Power supply
Battery type	Lithium battery (cannot be replaced)
Battery voltage	3.0 V
Battery life	Up to 10 years ¹ + reserve
¹ Battery life up to 10 years as of commissioning. Actual battery life depending on operating state and external factors.

Display
Display	8-digit BCD
Volume indicator based on device configuration	m³: Decimal with 3 digits

Communications
Optical interface Protocol	Per EN13757-2,3,7
RF:
Frequency band	S-mode: 868.3 ±0.3 MHz; C-mode: 868.95 ±0.25 MHz
RF protocol	Wireless M-bus per EN13757-4
Transmitter power	Typical 10 dBm, max. 14 dBm
Duty cycle	< 1 % (50 ms/128s)

Cikd water/hot water screw-type meters
Continuous flow Q₃	m³/h	2.5	2.5	4
Mounting length	mm	80	110	130
Connection		G ¾ B"	G ¾ B"	G ¾ B"
Meterological class Horizontal Vertical		R80 R40	R80 R40	R80 R40
Overload flow rate Q₄	m³/h	3.13	3.13	5.0
Minimum flow rate Q₁ Horizontal (R80) Vertical (R40)	l/h l/h	31.25 62.5	31.25 62.5	50.0 100.0
Transitional flow rate Q₂ Horizontal (R80) Vertical (R40)	l/h l/h	50.0 100.0	50.0 100.0	80.0 160.0
Response threshold (typical)	l/h	ca. 4-5 l	ca. 4-5 l	approx. 5-6
Measuring range Cold water meter WFK636.. Hot water meter WFW636..	5 °C…≤30 °C 30 °C… ≤90 °C
Nominal pressure	1.6 MPa (PN16)
Mounting position	Horizontal/vertical
Display	8-digit LCD field

Cold/hot water mechanical capsule meters
Continuous flow Q₃	m³/h	2.5
Meterological class Horizontal Vertical		R80 R40
Overload flow rate Q₄	m³/h	3.13
Minimum flow rate Q₁ Horizontal (R80) Vertical (R40)	l/h l/h	31.25 62.5
Transitional flow rate Q₂ Horizontal (R80) Vertical (R40)	l/h l/h	50.0 100.0
Response threshold (typical)	l/h	ca. 4-5 l
Measuring range Cold water meter WMK636.. Hot water meter WMW636..	5 °C… ≤30 °C 30 °C… ≤90 °C
Nominal pressure	1.6 MPa (PN16)
Mounting position	Horizontal/vertical
Display	8-digit LCD field

Protection degree of housing
Protection class	III
Degree of protection
Meter processor	IP65 / IP68 per EN 60529
Flow measuring section	IP65 / IP68 per EN 60529

Ambient conditions
	Running	Transportation	Storage
Temperature	+5…+55 °C	-25…+70 °C	-5…+45 °C
Humidity	<95 % r.h. at 25 °C (non-condensing)

Standards, directives and approvals
EU conformity (CE)	See EU declaration of conformance *)
Flow profile sensitivity classes	U0 / D0
Product standard	ISO 4064/2

Environmental compatibility
The product environmental declaration *) contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal).

Dimensions
See "Dimensions"

Housing material

Flow measuring section

Screw-type meter: Brass

Meauring capsule meter: Plastic

Totalizer

Plastic

Housing colors
Totalizer	Transparent

Weight screw-type meter WF.636..
Device packed complete with inserts	2.5 m³/h / 80 mm: 0.403 kg 2.5 m³/h / 110 mm: 0.437 kg 4 m³/h / 130 mm: 0.31 kg

Weight meauring capsule meter WM.636..
Device packed complete with inserts	IST: 2.5 m³/h / G2": 0,279 kg TE1: 2.5 m³/h / M62 x 2: 0,233 kg A34: 2.5 m³/h / M77 x 15: 0,523 kg

*) The documents can be downloaded at http://siemens.com/bt/download.