Fluke Biomedical 190I - Manual (Page 5)

Introduction
Product Description
1
1-1
Section 1
Introduction
1.1 Product Description
The 190I is a portable, battery-operated general-purpose survey meter for use with an internal Geiger-
Mueller (GM) radiation detector. The design combines CMOS microprocessor technology, automatic
range changing, and a Liquid Crystal Display (LCD) into an easy to use instrument.
The 190I is housed in a lightweight, plastic case designed for portability and durability. Measurement
results are indicated on the front panel LCD. The display includes:
• A 51 element analog bar graph near the top of the display to provide real time response.
• A scale multiplier, located below the bargraph relates the analog bargraph full scale to the units
displayed.
• Detector range bargraph consisting of five horizontal bars that indicate the quantity of the dynamic
range of the detector in use.
• A 16 character alphanumeric display that (1) provides a digitized average of the bargraph value or
integrated reading with elapsed time, and (2) displays operational information (e.g., such as
response time changes or changes in the units of the display).
• A backlight, activated by either of two front panel switches, that provides for operation in dark
environments.
The analog bargraph emulates an analog meter movement and is especially useful in survey applications.
The digitized value is intended for quantitative analysis and data logging applications where an
interpretation of the average reading of the analog bargraph is required.
The following controls are available from the front panel:
• Light (2) activates the LCD backlight.
• Mode changes the display units.
• Log, if activated, logs currently displayed data or changes current location identifier, depending on
the currently active logging mode (i.e., timed or manual logging).
The optional Infrared Communicator, 190I-1A, is
required to activate the Log function.
• Rate/Integ toggles the alphanumeric display between the digitized rate value and the integrate
value.
• Resp Time changes the response time on the first range or resets the integrate value and elapsed
time (if pressed and held for three seconds).
• Audio toggles the click output associated with counting events in the detector on/off and
acknowledges alarms.
• On/Off turns instrument power on/off when permitted by the microprocessor (i.e., when Logging is inactive or
all logged data has been uploaded to a computer).
NOTE