User manual

After at least 10 measurements (depends on the gate time and the

frequency change) press the push-button "CALL” once. "---HI—"

then appears on the display, shortly afterwards the highest measu-

red frequency value is displayed. "R.C.” flashes.

Press the push-button "CALL” again (second time). "---Lo---" then

appears on the display, shortly afterwards the lowest measured fre-

quency value is displayed.

Apply the push-button "CALL” again (third time). Subsequently, "---

A---" is displayed, followed immediately afterwards by the average

value. The averaging is updated every 10 measurements.

Press the push-button "CALL” again (fourth time). The symbol

"R.C.” no longer flashes. The measurement value recording can be

terminated by applying the push-button "RECORD”. The symbol

"R.C.” then disappears from the display.

B9 Auto-Power-Off

The measurement device features an Auto-Power-Off. After approx.

30 minutes the measurement device is switched off, if no push-but-

ton or switch is applied and the last digit of the measured value

does not change by more than 10.

B10 Overload display

The display "---oL---" appears and an acoustic warning signal

sounds,

- if the value measured at channel C exceeds 10 MHz,

- if the value measured at channel B exceeds 500 MHz, or

- if, during period measurement, no signal is applied to channel C.

Disposal

At the end of its useful life dispose of the (irreparable) Frequency

Counter FC-2500 according to the relevant statutory regulations!