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SMALL AND PORTABLE
LIVE TIME
DISPLAY
LONG BATTERY
LIFE
1024 CHANNELS
LOW COST
BUILT IN
DISPLAY
INTERNAL
OR EXTERNAL PREAMP/HV
FLEXIBLE
DETECTOR CONNECTION
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The
model 7000 “Rainbow” Multi-Channel Analyzer is a low cost
portable self contained MCA. It can be used in the field or the
lab for both routine or emergency measurements. It offers all the
usual features of most MCAs, including 1024 channels, dead time
correction, digital gain, expanded scales and built in memory storage.
The Rainbow MCA was designed to combat the problems of 3 piece MCAs
(small MCA, detector and laptop) in several ways. First, the instrument
is ruggedly constructed for use in the field. Second, the battery
life of the Rainbow is 100 hours, enough for several days use. Third,
the unit is self contained, small, and lightweight; it only needs
a detector. And fourth, the cost of the instrument is low.
The Rainbow has all the bells and whistles you would expect from
a current MCA. It has 1024 channels rather that 256. The gain is
digitally adjusted and can be changed from the front panel. The
user friendly interface is through 7 pushbuttons. 5 of these are
used as simple softkeys. The battery life is long and the electronics
uses standard parts for easy maintenance now and in the future.
A scintillation detector can be strapped to the top of the Rainbow
to create a single package for easy carrying, storage or use. The
switches and connectors are all guarded to protect them from damage.
The detector can be either of two types. The detector can have its
own power supply and preamp, or it can rely on the optional removable
high voltage power supply and preamp inside the Rainbow MCA. This
enhances its versatility and helps to keep the costs down because
it may be used with existing equipment, particularly scintillators
that have been used with count rate meters.
The Rainbow MCA is a simple, sturdy instrument that is usable in
many diverse areas. Its portability and compact size is particularly
useful in field work and appreciated in the lab. For most users,
it is the ideal solution for looking at radiation spectra.
Specification
Mechanical
 Size: 9 1/2”
L x 6” W x 1 7/8 “ H
Weight: 3.1
Lb.
Construction:
Painted aluminum case with gasketed keyboard
Electrical
Display:
240 x 64 dot LCD with Contrast Adjustment
Keyboard:
7 pushbutton switches protected with silicone rubber gasket
Batteries:
3 D cells will operate instrument with detector for 100 hours. Low
battery indication. Instrument will automatically turn off when
batteries are too low for proper operation.
Internal
Adjustments: LLD, ADC Zero, Pole Zero, Conversion Gain, HV (with
HV/Preamp Board)
External
Connectors: DB9 Connector for RS-232 Interface, DB9 Connector for
External Detector, BNC Input for use with optional HV/Preamp Board
MCA
Channels:
1024
Counts/Channel:
65,535
Amplifier
Gain: Adjustable in 4096 steps
ADC: Wilkinson
type 14 MHz Clock
Conversion
time: 10 us to 150 us
Maximum Count
rate: >10,000 CPS
Operational
Modes: Acquire
& view data, file data, setup
Compressed
and expanded display
LIVE TIME
display
Background
subtraction
Dead time
correction w/bargraph
Region of
interest
Storage:
12 ea. 1024 channel spectra
Detector
General Arrangement:
The Rainbow MCA can accept 4 different types of detector arrangements.
1) Output from external preamp/HV 2) Output from external preamp,
amp/hv 3) For scintillators, the optional preamp/HV circuit board
can be internally mounted inside the Rainbow MCA. This provides
adjustable high voltage and preamp gain/shaping. The scintillation
probe then plugs into the BNC on the MCA. 4) The HPI Scintillation
Probe with built in high voltage and preamp.
Environmental
Temperature
Range: 0°C to 50°C
Storage Temperature:
-20°C to 60°C
Options/Equipment
Options:
Internal HV/Preamp Board with High voltage power supply and preamp
for scintillation detectors, Scintillation Probe, Scintillation
Probe W/ Preamp and HV, cable, shoulder strap, repair manual
Equipment:
Supplied w/ manual, batteries, Hand Strap
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