操作簡單
WINDOWS 95/98 系統操作簡單易學,利用按鈕、滾軸與單鍵指令作一般應用, RAS-24 使用者介面可直接進行重要系統功能。選擇所需執行的量測方式 - 折射、 2D 反射、 3D 與 RAS-24 架構,當回辦公室後,可用現場使用之同一軟體進行檢視觀測資料,選取並列印結果。
擴充性
RAS-24 為分散式震測系統,提供獨特彈性組合為其他廠牌的震測儀無法達到的功能。連接一組 RAS-24 至攜帶型電腦就組成一套攜帶型 24 頻道 ( 或 12 頻道 ) 的折射震測儀,連接 10 組 RAS-24 就組成 240 頻道、 2D 反射震測儀,重新排列這 10 組 RAS-24 可得到 10 條測線,每條 24 頻道的 3D 震測系統,而不需增加任何特別軟體。 |
應 用 範 圍
油氣探測
礦物調查
大地調查
工程地質
地下水調查
VSP 與 Tomography
岩盤深度調查
場址補救調查
表面波分析
斷層調查
Rippability 調查
教學與研究 |
24 頻道配置圖
48 頻道配置圖
詳細規格
Number of Channels: |
12 or 24 per RAS module, up to 240 channels per system (10 modules) |
Sample Intervals: |
0.125, 0.25, 0.5, 1, 2 and 4 ms |
Record Length: |
4 ms - 64 sec, 2 ms - 32 sec, 1 ms - 16 sec,
5 ms - 8 sec,.25 ms - 4 sec, .125 ms - 2 sec |
Multiline Operation: |
10 lines |
CDP Operation: |
2D: Automatic or manual roll of entire spread
3D: Managed by RAS-24 script editor |
Stacking: |
Vertical stack |
Cable: |
One 12 takeout cable for 12 channel system. Two for 24 channel system |
Laptop to RAS Interval: |
1200ft maximum 3 pair wire |
RAS to RAS Interval: |
5000ft maximum 2 pair wire |
Recording Format: |
SEG-2, SEG-D 8038, SEG-D 8058 |
A/D Resolution: |
24 bits using Delta-Sigma A/D converters - one per channel |
Preamp Gain (PG): |
12db, 24db, 36db or 48db, remotely selectable |
Frequency Response: |
.125 ms: 2 - 3300Hz, .25 ms: 2 - 1650 Hz, .5 ms: 2 - 825 Hz,
1 ms: 2 - 412 Hz, 2 ms: 2 - 206 Hz, 4 ms: 2 - 103 Hz |
Dynamic Range: |
112db @ 2 ms PG=36db, 117db @ 2 ms PG=12db (typ) |
Distortion (THD): |
.005% at 25 Hz, 2 ms sample interval (typ) |
Crosstalk: |
Greater than 90db |
CMR: |
Greater than 90db @ 60 Hz |
Max Input Signal: |
880 mVRMS @ 12db, 55 mVRMS @ 36db |
Input Noise: |
.21 mVRMS @ 2ms PG=36db, 1.6 mVRMS @ 2ms PG=12db (typ) |
Anti-Alias Filters: |
4 ms 103 Hz, 2 ms 206 Hz, 1 ms 412 Hz, .5 ms 825 Hz,
.25ms 1650 Hz, .125ms 3300 Hz |
Test Oscillator: |
10, 25, 50, 60, 100, 125, 200, 250 Hz
Amplitude adjustable in 10 mV steps |
Instrument Tests: |
Internal digital tests, battery voltage, internal voltage, crosstalk,
amplifier pulse, CMR, amplifier noise, dynamic range, gain &
phase similarity, system timing, communications, trigger verification |
Line Tests: |
Geophone pulse, geophone similarity, geophone resistance, cable leakage |
Connectors: |
Two 27-pin NK-27-21C connectors for geophone spread cable,
3-pin Bendix for trigger, two 6-pin Bendix for data,
3-pin Cannon for power |
Power: |
12 volts nominal.
Standby: 60ma / Acquisition:12 Chs: 1A, 24 Chs: 2A |
Physical: |
27 x 34 x 15 cm, 5 kg |
Operating Temp: |
-30 to 70°C |
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