DFM-480-P Digital Field Monitor This product is no longer being manufactured. A limited supply are available at a special price. Call or email for more information. Service and support of the unit will continue until stocked parts are depleted.

The DFM-480-P Digital Field Monitor is a PC-based unit that utilizes a Pentium® CPU for rapid data rasterization and transfer, compatible with major Seismic Data Acquisition Systems.

Environmentally safe, the DFM-480-P uses a direct thermal (dry plotting) process on thermal paper, eliminating the use of toner or chemicals, and plots an 11.6" wide image in wiggle or variable mode with a resolution of 200 DPI.  It also provides annotation for timing lines, channel numbers, seismic lines, and station numbers.

System and plot parameters are entered from the front panel keypad, or from remote seismic recording systems.  Plot headers are entered from the keypad or ASCII text editors.

Channels are monitored and displayed on a wide angle Electro-Luminescent (EL) display for QC of noisy or dead channels before recording.  Its single fold (near trace gather) feature stores a combination of 4 data or AUX channels for each SP or VP location.   After a recording sequence, a near trace gather section can be displayed.

The DFM-480-P is designed for reliability and ease-of-use, requiring little maintenance.  The DFM-480-P has built-in diagnostic and test functions, and its documentation includes diagnostics to board level.

Paper loads from a front panel access, and all PC boards are mounted vertically and fully supported against shock damage.  Continuous air flow across the boards prevents overheating, even in confined areas.  Four expansion slots provide room for additional enhancements.

Features

• Pentium® PC-based
• Menu-driven
• Seismic signals monitored and displayed on wide angle VGA EL monitor screen
• 200 DPI resolution output on 12" thermal paper
• Accepts up to 8200 digital input channels
• Displays 480 channels time sequentially, 8200 channels trace-sequentially
• Near-trace gathering (100% fold)
• Vibroseis QC package optional
• Upgradable for field processing
• Environmentally safe
• Rugged, portable, easy to maintain

DFM-480-P Interfaces

Interfaces for the industry's major Data Acquisition Systems are stored in memory.  The standard digital interface allows conversion from one recording system to another simply by changing interface cables and entering new parameters at the front panel.  Customer-specified interface cables are included with the DFM-480-P.

Operational

Maximum Input Channels	8200
Maximum Plot Channels	Time Seq.: 480 plus 16 AUX Trace Seq.: 8200 plus 16 AUX
Input Format	Digital MUX/DEMUX data
Selectable Plot Formats	2.5, 5, 10, 20, 40 in/sec
Plot Time
at 240 channels	4 in/sec
at 480 channels	3 in/sec
Sample Rate(ms)	Accepts 0.25, 0.5, 1, 2, 4
Memory Size (Megabytes)	8, 16, or 32
Group Setup Mode	16 groups selectable
Plot Group	Auto-increment or manual mode selectable
Plot Length	Plot window selectable
Plot Attenuation	0-42 dB at 6 dB per step
Trace Overlap	Selectable for 1, 2, 3, or 4 trace overlap display
Trace Select	Auto or manual
Trace Spacing	4-40 traces/inch
Display Mode	Wiggle, variable area, or halftone
Plot Display Format	Time or trace sequential
Interpolation (linear)	1:1, 1:2, 1:4, 1:8, 1:16
AUX Channel Expansion	Double or Quad space per AUX channel
Multi Mode Capability	2, 3, 4, 5 data blocks per record
Header Information	4 KB
Seis Monitor Display	Seis monitor key
Seis Monitor Plot:	Print key
Monitor Trace Display	480 channels per group
EL Display (VGA)	640x480 dots

Recording Unit

Plot/Print Media	Direct Thermal Printhead
Resolution	200 DPI
Dot Size	4 mil x 6 mil
Recording Width	11.6 inches
Paper Roll Size	12 inches x 500 feet

Environmental

Temperature	Operating: 0° C to 50° C Storage: -40° C to 85° C
Humidity	5-95% non-condensing

Physical

Dimensions	19.8 x 21 x 12 inches
Weight	52 lbs.
Vibration	Amplitude 0.05 in (2G) at 30 Hz for 30 minute duration in direction of X, Y, Z

Power Requirements

Voltage	12 VDC Optional 115 or 230 Autoswitch
Frequency	50/60 Hz 60 watts standby 200 watts operating 360 watts peak

If you have questions about any of our products, please don't hesitate to contact us via e-mail to seismic@oyo.com, or through conventional means to:

Specifications are subject to change without notice.   Pentium® is a registered trademark of Intel Corp.