This article addresses third-party Current Transformer (CT) use on the Wattwatchers Auditor 6M, and 6W series.
To ensure the best performance from Wattwatchers Auditors: Do not fit third-party CT's Use Wattwatchers-supplied CT clamps only.
Protect performance & your warranty:
Fitting third-party CT's (i.e. not supplied by Wattwatchers) can affect accuracy.
CT's of the incorrect specification could damage the Auditor.
Warranty is void if third-party CT's are used.
Wattwatchers Auditors are supplied with quality split-core CT's that have been tested with the Auditor to make measurements with Class 1 (1%) accuracy.
Wattwatchers CT's are an unusual specification, and so it is likely that any other CT's you may have on hand will be incorrect types.