Typical FM256 Specifications  (FM18/36 can be upgraded to these specifications)

GRADIOMETER
Sensor separation 
Operating field range 
Analogue ranges 
Digital ranges   
Digital display resolution
Data storage resolution
Response time
Display update rate 

LOGGER
Memory capacity 
Data retention time
Integral Sample Trigger 1m mark beep rate
Grid dimensions (length, width independent)
Sample and Traverse Intervals (independent)
RS232 baud rate 
RS232 output   
Typical download time 

GENERAL
Power Supply   

Battery life   

Working temperature 
Environmental rating
Instrument weight (including batteries)
Instrument dimensions   
Single carrying case dimensions
Single carrying case weight (empty)
Dual carrying case dimensions
Dual carrying case weight (empty)

CHARGER
Output   


Charging time
Input voltage to charger

DUAL GRADIOMETER CARRYING FRAME
Weight, including legs
Dimensions

500mm
+/- 100 uT, no latch-up for larger fields
+/- 5, 10, 20, 40, 80, 320, 640 nT
+/- 20000 nT          +/- 2000 nT            +/- 200 nT
            10 nT                     1 nT                   0.1 nT
             5 nT                   0.5 nT                 0.05 nT
          20 mS                    40 mS                 120 mS
Digital - 3 readings/s.  Analogue - 9 readings/s


256000 readings
> 10 years at 25 degrees C (CR2450 coin cell)
0.4 - 3.0s, adjustable in 0.02s increments
10, 20, 30, 40, 50, 100m
0.0625, 0.125, 0.25, 0.5, 1m (plus 2m Traverse Interval)
600, 1200, 2400, 4800, 9600, 14400, 19200 baud
TXD, GND, CTS, RTS with handshake
15 minutes for 256000 readings with fastest data format


2 x C NiMH, rechargeable 3500 mAH battery pack
2 x C Alkaline cells in holder
21 hours (15 hours with LCD backlight) NiMH
44 hours (31 hours with LCD backlight) Alkaline
-10 degrees C to + 50 degrees C
IP65 or better
2.5 Kg (5.5 lb)
620 x 380 x 120 mm
800 x 500 x 220 mm
6.6 Kg (14.5 lb)
640 x 660 x 220 mm
6.6 Kg (14.5 lb)


750 mA at 7.5V constant voltage (constant current fast/trickle charge system inside FM256). Can be used with vehicle adapters.
4 hours (NiMH only)
100-240V,47/63 Hz. International pins, UK,Euro,USA,Japan


2.3 Kg (5.1 lb)
1040 x 625 x 60 mm

                                  All components and specifications subject to change without prior notice

FM256 DUAL GRADIOMETER SYSTEM

SPECIFICATIONS

UPGRADING FROM AN FM18/FM36 TO FM256 SYSTEM

RECOMMENDED SYSTEMS AND ACCESSORIES 

DATA QUALITY - PROCESSING AND ANALYSIS WITH GEOPLOT

EXAMPLE SURVEY RESULTS

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