C 200158

Clear figures at the press of a button.All data can be called up on a multifunctional LC display

The microchip in the doprimo ®

converts the readings into clearlydefined and easy-to-read figures.Moreover, the built-in storage capability permits readings to be buffer-stored and retrieved for evaluation.All the information in the doprimo ® can be retrieved in 3 display loops:

•Meter-reading loop “A1”

•Technician loop “A2”

•Statistics loop “A3”

The display loops are shown consecutively when the sensor button is pressed (longer than 3 sec.).If the button is not activated for alengthy period within one loop, thedisplay jumps back. The last place inthe first line indicates the displayposition.In normal mode there is no display.After 60 sec. without operation thedisplay also goes off (exception:meter fault). The display is re-activated by touching the sensorbutton.

88888 888888 88

88888 888888 88

12345 A12101

18345 b31.12.95 45

13456 C31.12.94 53

31 12 d1196

12 06 E1196 88

00000 F0C

b01.08.95

12221 G05.96

12101 G06.95

A1

A2

A3

A1

2

3

4

5

6

7

1

2

1

12

1

1

1

The meter-reading loop

Segment testActivates/Deletes all segments for 2 sec.

Current consumptionConsumption of month in previousyearPrevious year consumption

Key day and test number

Consumption of year before previous

Key day and test number

Key date

Current date

Fault code display

Test number

(Display ≠ 0 not necessarely fault)

The technician loopUnit/Product scale

Display of the Kk value

Starting date

The statistics loopMonth-end consumption (example)

of May 1996

Month-end consumption (example)...up to june 1995

Prolonged button activation

Short button activation

Periodical display change

Which meter for which range of application ?How to determine the mean heating medium temperature.

The doprimo ® has a digital opticalinterface for programming.

LC display

Optical interface

Sensor button

Remote sensor housing

doprimo ® compact doprimo ® remote sensor

Mean heating medium temperature

Heating system

Two-pipe heating system doprimo ® compact

Single-pipe heating system doprimo ® remote sensor1 user per section

Single-pipe heating system, verticalMore than 1 user per section

Single-pipe heating system horizontalMore than 1 user per section

0 10 20 30 40 50 60 70 80 90 100 110 120 °C

Determining the mean heating medium temperature

The formula The variables

tm = tL +tV - tR

tV - tL

tR - tL

ln

tm = tL + ∆tln

∆tln = Logarithmic excess temperature

tm = Mean heating medium temperature

tV = Inlet temperature of the radiator

tR = Return temperature of the radiator

tL = Reference ambient temperature

doprimo ® IITechnical dataMeter type doprimo II ®

Modes 2-sensor mode (automatic changeover to 1-sensor mode at t>25°C)

Dimensions • Compact meter 82.0 x 40.5 x 26.5 mm

• Remote sensor meter 134.0 x 88.0 x 36.4 mm

• Remote sensor housing 45.0 x 12.9 x 11.5 mm

• Length of the remote sensor cable: 3.0 m

Material • Meter housing: Novodur ABS

• Heat conductor: Cast zinc

Display • Two lines

1st line : 5-digit + display position

2nd line : 6-digit + test number

• Resistant to elevated temperatures

• Generally no display, activated with button

• Resetting of the current reading on the key day

Tamper-proof feature • In the event of heat accumulation changeover from 2-sensor to 1-sensor mode

• Registration of the time of fault or tampering with sensors and cables

Suppression of metering Temperature on radiator <23°C

Temperature when metering starts ∆tm > 4K (radiator sensor-ambient temperature sensor)

Temperature metering range • Compact meter: 0°C-128°C

• Remote sensor meter: 0°C-128°C

Temperature resolution • Better than 0.2 K

tmax • Compact meter: 90°C

• Remote sensor meter: 110°C

tmin 35°C

Scales • Unit scale

• Product scale

• Kk value

Calendar function • Reading stores on programmable key day at the end of the month

12 dates /year)

• Storage of readings for the year before previous

• Storage of readings for the previous year

Power supply 3.0 V lithium battery for 10-year service life + 1 year storage + 1 year

standby

Installation point Generally in the centre at 75% radiator height

Type of installation Screwing and welding

Switch2 Energy SolutionsHigh MillCullingworth

BradfordBD13 5HA

Tel: 01535 270270 Fax: 01535 270283