Read the rating and pulse constant
Include phase count, rated voltage and current, marked accuracy class and wiring arrangement. Copy the pulse constant with its units, for example impulses per kWh, if the meter uses a test LED or pulse output. Note whether the display is set to a primary or secondary reading.
Identify the load conditions and register
List the requested current points and power factor at each point. Give the energy unit and identify the import or export register your records use. Include any programmed transformer ratios and flag a sealed meter so responsibility for access can be agreed with its owner.
Keep the configuration with the energy result
A meter may store more than one energy register and also display instantaneous power. Identify the register used by your energy report, its unit and the pulse output assigned to it. If a result is required for reactive energy as well as active energy, put both on the request. A power reading and an accumulated energy result answer different questions.
Copy the transformer ratios and other relevant configuration from approved records. Provide the preceding certificate when the same loading points are needed again. Where an acceptance statement is requested, send the applicable limit and document reference for review. Do not break a seal or change settings to prepare the instrument. Have the meter owner agree access, removal and restoration responsibilities before any site work or dispatch.
Which panel owns the reading?
Place the switchboard name next to each meter ID. Give the site contact who can confirm whether each meter may leave its panel. RTS can then review site and laboratory options for the group.
Energy calibrators that generate a meter test
An energy calibrator can generate voltage and current while comparing pulses from a meter. Identify the source channels, phase arrangement, pulse interface and reference energy function. State whether your result is expressed as power, energy or meter error. Include frequency and phase conditions for each requested point. The review must cover the reference direction and complete measurement arrangement; an energy-meter enquiry alone does not establish coverage of the calibrator's outputs.