Q: Does Grace Technologies offer a Voltage test station or Test-point that has 1% accuracy?

A: We do not, we offer 2% accuracy max with the Test points and the Voltage test stations using a 10MΩ Multimeter.
Please see the equation below for calculating voltage as accurate as possible in consideration of impedance on the Test point and VTS circuit.

CALCULATIONS
Calculated Voltage = (Meter R / Sum R) x V
Where,
- Meter R = Multimeter Impedance
- Sum R = Internal resistance of Safe-Test Point + Meter R
- V = System Voltage