Eberline ESP-1 - Page 54

DETECTOR HIGH INPUT NOMINAL-VALUES***** ALIBRATION FIELDS
MODEL VOLTAGE SENSITIVITY | UNITS "СС=" "DT(SEC)" SET "СС" AT: БЕТ "DT" AT:
AC-3-7 1000V** 10тУ cpm 2,80-01*** 1.20-05 30K cpm 2.5M cpm
AC-3-8 1000V** 10 mV cpm 1.80-01*** 1.20-05 30K срт 2.5M cpm
HP-100A 1550V** 1.75 mV cpm week ers **s*.. reas
HP-210,260 900У 10 тУ cpm 1.00+00* 7.50-05 72K cpm 2700K cpm
(520 тЕЉ («150 тК АҢ
HP-190A 900V 10 mV cpm 1.00+00* 3.00-04 50K cpm 500К cpm
(«20 тЕЛЖ («200 mR/t y
НР-220А 550У 10 mV R/h 1.55+06 7.60-05 500 mR/h 200 Rh
HP-270 900У 10 mV пЕЉ 7.00+07 1.20-04 20 mRAh 1.0 Rh
HP-290 550V 10 mV R/h 5.00406 2.00-05 500 mR/h 25 Rh
HP-230A 900У 10 mV cpm 1.00+00* 1.67-04 60К срт 1800К срт
(20 mR — («600 RAM]
LEG-1, PG-2 1000V** 10mV cpm 1.00400 1.20-05 50K cpm 3000K cpm
NRD 1850V**** 2mV mREM/h 3.00406 1.00-05 27 mREMA fixed value
(51200 срт)
SAC-RS 800V** 10 mV cpm sah **s**** sss... sess.
SPA-1A 650V** 10 mV dpm 5.00-01*** 1.00-05 10K cpm fixed value
SPA-3 1000У%% 10mV cpm 1.00400 1.40-05 700K cpm 3000K cpm
SPA-6 1000V** 10 mV cpm 1.00400 1.20-05 50К cpm 3000K cpm
SPA-8 700У%% 10 mV cpm 1.00+00 3.50-05 fixed value 7.5 mR/h
(51.0 x 10 cpm)
SPA-9 1000V** 10 mV cpm 1.00+00 1.85-05 fixed value 5.0 mR/h
(=2.5 x 105 cpm)
WAM-4 1000У%% 8mV dps 176-01 1.30-05 30K cpm fixed value
RCM-1 1200V** 5шУ dps 2.80-01 130-05 60K cpm fixed value
*These are the values to be used when the instrument is set up to read in units of срт. Other values must be used for "CC" if you wish to set
your instrument to read in 2x cpm or ἀπ dpm alpha or beta efficiency.
** Detector high voltage should be set after running detector platcau.
***Set to the efficiency value determined from plateau (e.g., if 31 percent efficient, then CC = 3.10-01). If calibration is to true detector counts,
"CC" should be set to 1.00 after "DT" adjustment has been performed.
**** HV setting depends on gamma rejection point. Determine by placing NRD in 10 R/h gamma field (or desired gamma field to be rejected)
and adjust НУ for approximately 50 cpm. Reduce НУ by 50 V and verify no counts in the 10 R/h field. The НУ set point is now established,
and should not exceed 2200 V.
*****These nominal values may be used to set up the instrument; (1) if the calibration sheet (which has the exact values) for the instrument with
the specific detector is not available; or (2) if the user wishes to use a detector which was not purchased with the instrument. Please note that the
use of nominal values constitutes a generic rather than a specific calibration and, therefore, will be less accurate as compared to using values from
the
calibration
sheet,
E
The instrument is operated in the scaler mode, counts/min. The CC is set to 1.00+00 and the DT is set to 1.00-06 (fixed values).
W Approximate values in mR/h are based on Cs-137 photons.
Figure 5-2 Suggested Calibration Levels for ESP-1, 11292-A36C
ESP1.MAN/February
1992
5-5