Identification Of Controls And Functions - LUDLUM MODEL 19 Manual

Model 19 MICRO R METER
4
Section
Ludlum Measurements, Inc.
Technical Manual
Identification of Controls and
Functions
Range Selector Switch:
250, 50, and 25. Moving the range selector switch to one of the range
positions (5000, 500, 250, 50, 25) provides the operator with an overall
range of 0-5000 µR/hr. Note that the range positions 5000, 500 and 50
are screened in black and correspond to the meter scale screened in
black. The range positions 250 and 25 are screened in red and
correspond to the meter scale screened in red.
AUD ON-OFF Toggle Switch:
the unimorph speaker, located on the left side of the instrument. The
frequency of the clicks is relative to the rate of the incoming pulses. The
higher the rate is, the higher the audio frequency. The audio should be
turned OFF when not required in order to reduce battery drain.
provides meter response. Selecting the fast, "
F-S Toggle Switch:
position of the toggle switch provides 90% of full-scale meter deflection
in four seconds. In the slow, "
deflection takes 22 seconds. In "
large meter deviation. The "
and damped, meter deviation.
BAT Pushbutton Switch:
battery charge status on the meter. The range selector switch must be
out of the position.
OFF
RES Pushbutton Switch:
means to drive the meter to zero.
LAMP Pushbutton Switch:
face.
HV Pushbutton Switch:
high voltage. Each meter division is equivalent to 100 V.
Page 4-1
a six-position switch marked
In the position, the switch operates
ON
," position, 90% of full-scale meter
S
" position, there is fast response and
F
" position should be used for slow response
S
when depressed, this switch indicates the
When depressed, this switch provides a rapid
When depressed, this switch lights the meter
When depressed, the meter reads the detector
Section 4
, 5000, 500,
OFF
,"
F
February 2012