Fluke Biomedical 875 Victoreen - Manual (Page 8)

General Information
Specifications
1
Relative Humidity (Operating): 0 % to 90 % (non-
condensatio
1-3
n)
Irradiation: 3.5 to 1 x 10 3 Rads @ 60 °C integrated over
40 years life.
Mounting assis
Available Op onsu 876A-100: dout, for use with digit l systems
Ou 100 mV
50 mV
10 mV
5 V
Fig
rates th response for r, Figure 1-3 illustra pical linearity for
the d Figure radiation input er reading.
1. ent
H ontainm or Detecto
Th containm detector is a tector that has the appearance of a
si r domed out seven inc er are two flange-mounted
el isting of haped plates, ur inches in diameter, stacked, and
ounted on disk rods. The assembly has the appearance of a large air capacitor. The mounting posts are
h insulating spacers, so the flange and housing will be neutral with
d by the six-inch diameter housing which contacts only the neutral
flange is pierced by three holes. One hole supports the exhaust tube used
er two support two 2-pin connectors, one for each
el ted to the neutral mounting flange. When the coaxial signal
ca cable shield is connected to the neutral pin.
T and nitrogen at atmospheric pressure and sealed.
F r to Section 4, Functional Description.
e an indication, on an analog meter, of radiation levels
w co omposed of an analog meter, indicator lights and operating
switches. The meter has a range of 1 to 10 R/h and is controlled by an eight position rotary switch. The
readout is mounted in the 876-1-55 Rack Chassis located in the control room.
For further information refer to Section 4, Functional Description.
Rack Chassis (876-1-55)
The 876-1-55 Rack Chassis permits mounting of two readout modules or one readout module and one
optical isolator in a 19-inch wide RETMA equipment rack. The panel height is 5.21 inches.
For further information refer to applicable drawing located in Appendix C.
Pull Box Assembly (878-12-5)
876-1-55, Rack Ch
tions (c lt factory) Rea
tputs: 0 -
a
0 -
0 -
0 -
ure 1-2 illust
detector an e typical energy
1-4 illustrates
the detecto
versus met
tes ty
3 Equipm Overview
igh-Range C ent Monit r (877-1)
e high-range
x-inch diamete
ent monitor
cylinder ab
n ion chamber de
hes long. Inside the cylind
ectrodes cons 31 flat, disk-s each about fo
m
attached to the mounting flange throug
respect to the charges applied to the electrodes.
The whole assembly is covere
mounting flange. The mounting
for exhausting and back filling the chamber. The oth
ectrode. One pin in each pair is connec
ble is connected to this connector, the
he entire chamber is filled with a mixture of helium
or further information refe
Readout Module (876A-1)
The 876A-1 Readout Module is designed to giv
ithin the ntainment area. The readout is c
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