CalCard (Calibration Checkbox) Specification
Extended Calibration
Inspectorates have stated, that providing records are kept of ongoing accuracy and the instrument drift remains within 10% then the instruments calibration period can be extended from 1 year to 3 years.
Records can be kept in three ways: –
- Traditional paper record sheets. Shop
- Word Document record sheets. Shop
- OCV Application, The modern proffesional solution. Click Here
Dependability
To ensure instrument probes connect consistently the access pads are coated firstly in copper for connectivity, then nickel to prevent hard points of the probe penetrating and breaking the pads, then finally gold to maintain the consistent measurement and protection from corrosion and tarnishing.
- Top layer – Gold
- Middle layer – Nickel
- Botton layer – Copper
Insulation/Isolation Tests
Five Resistance Values against either of the two common points
All tested to 1,500 Volts.
- 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 Wiring Regulations:
Continuity Tests
Five Resistance Values all measured against either common point.
- 0,25Ω
- 0.5Ω
- 1Ω
- 2Ω
- 5 Ω
The most critical areas of testing for R1+R2 or simply R2 are usually within the parameters of the CalCard
Contact Plates
The use of recessed sunken pads instead of panel mounted sockets, simplifies probe location and speeds up the check time – there is no need to remove instrument probes.
Compact
Yes it is Credit Card sized. Not to be hidden or buried in a van’s or tool box, it can be stored with the instrument, where you would need it.
Strong and Waterproof
Comprised of laminated layers on a multi-layered glass fibre base, it provides a very tough resilient product that is both moisture resilient and strong enough to survive the working environment.