Geometrics G-822A, Руководство по эксплуатации

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Geometrics, Inc. G-822/G-823 Magnetometer Manual
44
APPENDIX A2. MODEL G-823A SPECIFICATIONS
O
PERATING
P
RINCIPLE
: Self-oscillating split-beam Cesium Vapor (non-
radioactive)
O
PERATING
R
ANGE
: 20,000 to 100,000 nT
O
PERATING
Z
ONES
:
The earth
’
s field vector should be at an angle greater
than 6 º from the sensor
’
s equator and greater than 6 º
away from the sensor
’
s long axis. Automatic hemisphere
switching.
S
ENSITIVITY
<0.004 nT/
√
Hz rms. Typically 0.02 nT P-P at a 0.1
second sample rate (90% of all readings falling within the
P-P envelope) using CM-201 Mini-Counter
H
EADING
E
RROR
:
<0.15 nT over entire 360
º
polar and equatorial spin. Not
specified on 823B
A
BSOLUTE
A
CCURACY
: Better than 3 nT throughout range
O
UTPUT
: Cycle of Larmor frequency = 3.498572 Hz/nT, RS-232
data at 9600 baud, concatenated data streams from up to
6 sensors
M
ECHANICAL
:
S
ENSOR
:
2.375” (60.32 mm) dia., 6.25” (158.75 mm) long,
12 oz (339g) without cable, 24 oz ( 680 g) with cable
S
ENSOR
E
LECTRONICS
:
2.5” (63.5 mm) dia., 11” (279.4 mm) long, 29oz 822g)
C
ABLES
:
Sensor to sensor
driver / counter:
109” (2.77 m) standard. Cable length can be increased
by 43” (1.10 m) for a total length of 152” (3.87m).
Sensor driver
to external counter:
33’ (10m) standard. Cable length can be increased up to
164’ (50 m)
Sensor driver /
counter to
Power/data junction
25’ (7.6m) standard. Cable length can be increased up to
200’ (61 m)
O
PERATING
T
EMPERATURE
:
-30
º
F to +122
º
F (-35
º
C to +50
º
C)
S
TORAGE
T
EMPERATURE
: -48 º F to +158 º F (-45 º C to +70 º C)
A
LTITUDE
: Up to 30,000 ft (9,000 m)
W
ATER
T
IGHT
: Sealed for up to 2 ft (0.9 m) water depth
P
OWER
:
24 to 32 VDC, 0.75 amp at turn-on and 0.5 amp thereafter
A
CCESSORIES
:
Standard:
Power/RS-232 multi-conductor cable (electronics to
power/data junction box with 9 pin RS-232 connector and
power lugs), lengths to be specified, spare O rings,
operation manual and carrying case
Optional:
Birds, Stingers, Wingtips, Avionics, GPS receivers
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE