Simpson 460 4 Series - Page 25

Controls, Connectors, and Indicators
10. Numerical Display:
11. Analog Display:
12. AC Power Receptacle:
for proper operation. If the display indicates
greater than +6.0 volts, either the battery is
not installed or the battery is not installed
properly.
The digital display uses LED's and includes a
polarity (+, —) sign, a “1” digit, three 7-seg-
ment type 0 to 9 digits and a decimal point, to
indicate the polarity and the value of the signal
being measured. The decimal point is properly
positioned by the selection of the range switch.
Over-range (or out-of-range) condition is indi-
cated by a flashing “1” display for 2000 counts
or greater.
The analog meter displays in analog form the
relative value of the input signal being meas-
ured. The reading is determined in conjunction
with the position setting of the range switch.
Two scale markings are provided: a linear
scale and a decibel scale marked —20 dB to
+8 dB. The readings are referenced to 0 dB
power level of 1 milliwatt into a 600 © load
(an actual voltage of 0.775V). The actual
decibel value is determined by:
(1) Reading the dB scale value, and
(2) adding the appropriate range factor as fol-
lows:
Range Add
200mV —20 dB
2V 0 dB
20V +20 dB
200V +40 dB
600V +60 dB
This receptable accepts the AC line power cord
used for AC operation or battery charging.