IN-7

IN-7 glow discharge indicator symbol – is designed for visual indication of units of measurement and the nature of electrical signals using symbols. The glow discharge symbol indicator with dome indication is identical in size and base to IN-4, contains a set of special symbols: n, +, m, A, V, M, Ω, ~, K. Some terminals are not connected.

Technical specifications:

• brightness luminescence: not less than 100 cd/m²
• viewing angle: not less than 60°
• power supply voltage: not less than 200 V
• Ignition voltage: no more than 170 V
• voltage of maintaining of combustion: not less than 160 V
• Indication current – no more than 2.5 mA.
• Supply current from a pulsating voltage source: – 1.5 mA
• The supply current from a DC voltage source is from 3.5 mA to 4 mA.

Scheme common anode.

• Sign height – 16 mm.
• Indication is made through a cylinder dome.
• Housing – glass.

Operating time – not less than 1000 hours.