T1. 1c2, 1l2 square-shaped insturmetn series.

This series of meters are applicated to the current, voltage, frequency in electric circuit, and the power factor, powerful power, no-powerful power, and the isochronous indication.

Include:
1c2-a dc amperemeter
1t1-a dc voltameter
1t1-a ac ampermeter
1t1-v ac voltameter
1l2-hz frequency meter
1l2-s isochronous indicator
1l2-cos& three-phase power factor meter
1l2-w. Valthree-phase powerful and nopowerful power meter