![Ludlum Measurements 125559 Скачать руководство пользователя страница 22](http://html.mh-extra.com/html/ludlum-measurements/125559/125559_manual_1946990022.webp)
MODEL 2224-1
Technical Manual
Section 6
Ludlum Measurements, Inc.
Page 6-4
January 2012
11.
Replace the Model 2224-1 cover (can) and proceed with
use.
Note:
D
ETECTOR
O
VERLOAD
C
ALIBRATION
The detector operating voltage (
HV
) must be determined
and set before the
OL
(overload) adjustment is performed.
If the detector operating voltage is re-adjusted, the
overload adjustment must be re-adjusted.
1.
Adjust the
OL
control to the maximum counterclock-
wise position.
Note:
Detector saturation is when the meter response no longer
increases with increasing radiation field intensity.
2.
For alpha/beta scintillators, expose the detector
photomultiplier tube (
PMT
) to a small light leak by
loosening the detector window. Some scintillation
detectors incorporate a screw in the detector body,
which when removed, will simulate a detector face
puncture or light leak. The meter should start to
decrease toward zero as light saturates the scintillation
material.
3.
Expose just enough light to where the meter starts to
decrease. Adjust the
OL
control until the overload
LED
just begins to flicker on the meter dial. The ratemeter
should deflect above full meter scale at this point.
4.
Re-seal the detector window and expose the detector to
a radiation source that will drive the meter near full
scale. Confirm that the
LED
does not turn on and the
meter remains on-scale.
Содержание 125559
Страница 1: ...LUDLUM MODEL 2224 1 SCALER RATEMETER January 2012 Serial Number 125559 and Succeeding Serial Numbers ...
Страница 2: ...LUDLUM MODEL 2224 1 SCALER RATEMETER January 2012 Serial Number 125559 and Succeeding Serial Numbers ...
Страница 4: ......
Страница 39: ......
Страница 40: ......
Страница 41: ......
Страница 42: ......
Страница 43: ......
Страница 44: ......
Страница 45: ......
Страница 46: ......
Страница 47: ......
Страница 48: ......
Страница 49: ......
Страница 50: ......
Страница 51: ......