ACE 2000

Q. What is the ratio of my current clamps?

A. The ACE products use current inputs of 3V full scale. The output of compatible volt out clamps ranges 1 to 3V, with 3 being the most common. The ratio is expressed as the primary side of the clamp over the volt out. ie: a 1000A clamp with a 2V output has a ratio of 1000:2, or 500.

Q. Does the instrument use calibrated clamps?

A. Yes, if they were bought with the unit or calibrated by AMETEK. This calibration identifies actual clamp ratio and phase shift and stores that information in the unit. When connected to a circuit the user selects the clamp being used by serial number and assigns it the proper phase. Uncalibrated clamps may be used with the theoretical ratio entered in the survey setup.

Q. If I am using clamps supplied with the instrument and selected under calibrated clamps, do I need to enter this information in the CT ratio selection?

A. No.

Q. How do I enter my ratio if the clamp provided with the instrument is measuring the secondary of a primary CT?

A. The ratios of the 2 devices are multiplied by the unit if properly setup. First select the clamp being used with the instrument from the calibrated clamp section. In the instrument setup screens find the CT Ratio selection and enter the primary CT information here. The instrument will now read real units of current.

ACE 4000

Q. What is the ratio of my current clamps?

A. The ACE products use current inputs of 3V full scale. The output of compatible volt out clamps ranges 1 to 3V, with 3 being the most common. The ratio is expressed as the primary side of the clamp over the volt out. ie: a 1000A clamp with a 2V output has a ratio of 1000:2, or 500.

Q. Does the instrument use calibrated clamps?

A. Yes, if they were bought with the unit or calibrated by AMETEK. This calibration identifies actual clamp ratio and phase shift and stores that information in the unit. When connected to a circuit the user selects the clamp being used by serial number and assigns it the proper phase. Uncalibrated clamps may be used with the theoretical ratio entered in the survey setup.

Q. If I am using clamps supplied with the instrument and selected in the survey setup, do I need to enter this information in the survey setup pages?

A. No.

Q. How do I enter my ratio if the clamp provided with the instrument is measuring the secondary of a primary CT?

A. The ratios of the 2 devices are multiplied by the unit if properly setup. First select the clamp being used with the instrument from the clamp file. In the survey setup screen find the "General" button and set the primary CT ratio in this area. The instrument will now read real units of current.

Q. When the instrument boots up I get an error that directs me to reload Windows. Should I do this?

A. No. The ACE 4000 does not run a Windows shell. If the CPM shell or Windows components are corrupted such that the unit will not boot it needs to be reghosted by AMETEK. Reloaded Windows and PowerACE will result in having a PC with PowerACE loaded on it.