4601 Manual.pdf - Krohn-Hite Corporation

3.2.0 Front Panel Controls3.2.1 Power switch: A rocker on-off line power.3.2.2 Stand By: An illuminated momentary push-button places unit in standby mode.3.2.3 Operate: An illuminated momentary push-button places unit in operate mode.3.2.4 Frequency select: Five position rotary switch selects one of up to 4 internal frequencies.This switch also provides a means to select an externally applied oscillator.3.2.5 Range switch: Five position rotary switch selects the desired range. The ranges are: 100mV, 1 V, 10 V, 100 V, and 1,000 V. One may span from 10% to 120% of full scale rangewith the decade switches. The MSD can not be dialed to zero.3.2.6 Decade switches: The decade switches are used to select the desired output voltage. Theplace value of each switch is referenced to the decimal light. For example: in the 1,000 Vrange, if all other switches were set at 10 and the MSD switch at 1, the output voltagewould be 211.110 volts rms. It is possible to resolve any output selected in one ppm steps.3.2.7 Level led's: the level led's monitor the output of the oscillator buffer. The correct operatinglevel is indicated when the green led is on by itself. This may also be used to set the inputlevel of an external oscillator.CAUTIONWhen the instrument is turned on the "standby" lamp will illuminate. This is normal.During normal operation, the "operate" lamp will be illuminated. If the "standby" lampilluminates, without being selected, use the following procedure:1) Check to see if there is a short circuit in the device that you are testing.2) Remove any leads and depress the "operate" push button momentarily.Do Not Force the instrument by continuing to hold down the "operate" button. Seriousand extensive damage may occur.If the instrument does not respond to a momentary touch of the "operate" button try again.After that, consult the trouble shooting section in the manual.7 Win-man\4601.wpd