Link !!top!! — Protek B801 Manual

Always verify the (often 500mA/250V and 10A/600V fast-blow) and battery type (typically 9V) from the manual before replacing them – using incorrect parts can damage the meter or cause injury.

: Use the seven range switches to set the base frequency and the tuning knob for fine adjustments. protek b801 manual link

Sine, Square, Triangle, Pulse, Ramp, and TTL sync output. Always verify the (often 500mA/250V and 10A/600V fast-blow)

Use the frequency dial and range switches to set the base repetition rate. The SYMMETRY control (pull-on) allows you to vary the duty cycle of your chosen waveform. protek b801 manual link

The B801 features a 100:1 tuning control on each range. Use the coarse dial for large jumps and the fine-tuning knob for precise adjustments.