1. CheckMeter 2.3 Portable Working Standard Page 1 March 2009

2. CheckMeter 2.3 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  3-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 for single- phase and three-phase, 3- or 4-wire, circuits 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 measurements  Power factor measurements  Frequency measurements Page 4 March 2009

5. Technical data Basic Characteristics  10... 300 V Auxiliary supply from measurement circuit  Clamp-on CTs 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 2.3 without printer [1]Phase connection U1, U2, U3 [2]Neutral connection N [3]Connection for CTs [4]Pulse input / output [5]Supply voltage connection [6]RS 232 serial line interface Page 6 March 2009

7. Connections Front view CheckMeter 2.3 without printer [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. Connections Top view CheckMeter 2.3 with integrated printer [1]Supply voltage connection [2]Phase connection U1, U2, U3 [3]Neutral connection N [4]Connection for CTs [5]Pulse input / output [6]RS 232 serial line interface Page 8 March 2009

9. Connections Front view CheckMeter 2.3 with integrated printer [7]LCD display [8]Start/Stop Impulses [9]Cursor keys [10]Alphanumeric keypad [11]Menu card keys [12]Integrated printer Page 9 March 2009

10. Page 10 March 2009 Current clamps to the CheckMeter 2.3  Error compensated clamp-on CTs for measurements in the range 10 mA … 120 A, cable diameter max. 10 mm  Clamp-on CTs for measurements in the range 10 mA … 120 A, cable diameter max. 52 mm

11. Page 11 March 2009 Operation Concept SymbolsDisplayControl Keys 

12. Operation Concept Status Indication Page 12 March 2009

13. Operation Concept Main Menu Meter Testing  Measurement of load values  Vector diagram  Energy measurement  Basic settings  Page 13 March 2009

14. Operation Concept Meter Testing Page 14 March 2009

15. Operation Concept Measurement of Load Values Page 15 March 2009

16. Operation Concept Harmonics Analysis, Waveform Display, Vector Diagram Page 16 March 2009

17. Operation Concept Energy Measurement Page 17 March 2009

18. Operation Concept Administrative data set (ADS) Page 18 March 2009

19. Operation Concept Examples of test results Page 19 March 2009

20. Windows © -Software CALSOFT Selection of real time readout or readout of sets of data from memory of CheckMeter 2.3 Page 20 March 2009