CAPINTEC, INC.
CRC
®
-712MH
Performance
Activity Range
There are six standard ranges whose full-scale values are as follows:
Curies
Becquerels
.1999 mCi
19.99 MBq
1.999 mCi
199.9 MBq
19.99 mCi
1.999 GBq
199.9 mCi
19.99 GBq
1.999 Ci
199.9 GBq
79.99 Ci
1999. GBq
Digital Readout
The activity measurement is displayed on a 4-digit, seven-segment (20mm. height)
LED display with a floating decimal point. Measurement over-range is set for 80.00Ci
(2000GBq) and is indicated by blanking of the display. Measurements above 20.00Ci
(80GBq) have reduced accuracy and are indicated by display flashing. The analog to
digital converter has an inherent uncertainty of, ±1 count on the least significant digit.
The units of measurement are displayed as back-lighted measurement characters
after the numeric display.
Iometer (Low Input Impedance Electrometer)
Accuracy:
±3% of reading.
Response time:
90% of full scale reading within 2 seconds for activity
measurements of 2 millicuries (200GBq) or more.
Noise: RMS
measurement
fluctuations:
2 counts in the last digit for the top 3 mCi & Ci (GBq) ranges
6 counts in the last digit for 2mCi (20MBq) & 20mCi (200MBq &
2GBq) ranges
30 counts in the last digits of the .2000mCi (20MBq) range
Detector
Detector Linearity:
chamber saturation 2% for 20Ci (740GBq) of Tc99m.
Detector Response: 25keV to 3MeV.
±2% of mean for radioisotopes with major photon radiation of
over 0.1MeV (when chamber response is normalized for Co60
and Co57 radiations).
January 08
FUCTIONAL & TECHNICAL DESCRIPTION
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