technical Details
Five Resistance Values indicated in BLUE
all measured against either common point indicated in BLACK.
All fixed and verified: -
- 0,25Ω
- 0.5Ω
- 1OΩ
- 2OΩ
- 5O Ω
The most critical areas of testing for R1+R2 or simply R2 are usually within the parameters of the CalCard EXT1
Five Resistance Values indicated in RED
all measured against either common point indicated in BLACK. All tested to 1,500 Volts.
All fixed and verified: -
- 0,5MΩ
- 1MΩ
- 2MΩ
- 10MΩ
- 20MΩ
These are all the realistic values which may be encountered during actual insulation resistance testing.
0.5M , 1M & 2M are particularly relevant to BS7671 IEE 16th and 17th Edition Wiring Regulations:
The Calibration Checkbox CalCard Ext 1 is really credit card size.
Approximate measurements are: -
- Height = 55mm
- Length = 85mm
- Thickness = 2mm
Place the Calibration Checkbox CalCard Ext 1 on a surface. Perform the confirmation tests by simply: -
- Without removing the probes from the meter.
- Place one probe onto either of the two "Common" pads.
- Place the other probe onto the required resistance pad
- Confirm, note or check the reading corresponds as expected.
