1. CheckMeter 2.1 Portable Working Standard Page 1 March 2009

2. CheckMeter 2.1 integrates today’s requirements of a Portable Working Standard for testing electricity meters and meter installations: Applications  Size & Dimensions  rigid design  light in weight  Accuracy  Class 0.2%  Functions  Meter testing  1-phase measurement  Current measurement  Voltage measurement  Energy measurement  Documentation  Data memory  Transfer to Windows © Software CALSOFT I Page 2 March 2009

3. Advantages  Precision test equipment for AC values in the 45 Hz to 66 Hz frequency range  LCD display ¼ VGA (240 x 320 Pixels) with graphical user interface  Wide measuring range with auto ranging  Display of vector diagram for analysis of mains conditions and meter connections  Measurements of wave forms and harmonics with display  Easy detection of circuit connection faults  Data memory for test results and customer data  Small dimensions and light in weight  Serial interface (RS 232) for data transfer Page 3 March 2009

4. Functions  Active, reactive and apparent energy measurement with integrated error calculator  Impulse output for energy (galvanic isolation)  Registration of active, reactive and apparent energy for register testing  Active, reactive and apparent power measurements  Current and voltage measurements  Phase angle measurement  Power factor measurement  Frequency measurement Page 4 March 2009

5. Technical data Basic Characteristics  10... 300 V Auxiliary supply from measurement circuit  Clamp-on CT 10 mA... 100 A  Measurements of: voltage, current, active, reactive and apparent power, energy, frequency, power factor, error measurement  Accuracy  0.2 % Options:  CALSOFT I Software Page 5 March 2009

6. Connections Top and bottom view CheckMeter 2.1 [1]Phase connection [2]Neutral connection N [3]Connection for CT [4]Pulse input / output [5]Supply voltage connection [6]RS 232 serial line interface Page 6 March 2009

7. Connections Front view CheckMeter 2.1 [7]LCD display [8]Menu card keys [9]Cursor keys [10]Enter key [11]Start/Stop Impulses [12]Alphanumeric keypad Page 7 March 2009

8. Current clamps to the CheckMeter 2.1  Error compensated clamp-on CT for measurements in the range 10 mA … 120 A, cable diameter max. 10 mm  Clamp-on CT for measurements in the range 10 mA … 120 A, cable diameter max. 52 mm Page 8 March 2009

9. Operation Concept SymbolsDisplayControl Keys  Page 9 March 2009

10. Operation Concept Status Indication Page 10 March 2009

11. Operation Concept Main Menu Meter Testing  Measurement of load values  Vector diagram  Energy measurement  Basic settings  Page 11 March 2009

12. Operation Concept Meter Testing Page 12 March 2009

13. Operation Concept Measurement of Load Values Page 13 March 2009

14. Operation Concept Harmonics Analysis, Waveform Display, Vector Diagram Page 14 March 2009

15. Operation Concept Energy Measurement Page 15 March 2009

16. Operation Concept Administrative data set (ADS) Page 16 March 2009

17. Operation Concept Examples of test results Page 17 March 2009

18. Connection example Testing of a direct connected meter up to 100 A Page 18 March 2009

19. Connection example Testing of transformer operated meter Page 19 March 2009

20. Windows © -Software CALSOFT Selection of real time readout or readout of sets of data from memory of CheckMeter 2.1 Page 20 March 2009