Geometrics Memory-Mag G-857 Manual de usuario

F) Check for magnetic objects near sensor. Examples

would be buildings, surface metal, objects on the

operator, etc.

G) Check for proximity of power lines. (Move away from

lines and repeat step 2.)

H) Check for low battery voltage.

DATA ERR ON DISPLAY: (data error)

A) Power interrupted while taking a sample. (Push any

key twice to make magnetometer continue to operate

in Data Err mode.)

B) Lithium battery dead. (Contact Factory.)

CLEAR DATA ERROR:

A) First save any data that is stored by outputting data to

computer (Push the [ OUTPUT ] button twice, then

press [ ENTER ] to start output).

B) Next press [ ERASE ] button twice, while displaying

DATA ERR, to clear data error.

Note: This will also erase all data.

NO DISPLAY:

A) Check battery cable connection.

LO BATT SIGNAL ON DISPLAY:

A) Replace battery.

DISPLAY READS FULL:

A) Memory is full. (Operator needs to output data to

computer and then erase memory.)

DISPLAY READS GPS ERR

A) GPS is not connected or not receiving fix. (Connect

GPS or change GPS Mode to Off)

UNIT FAILS TO OPERATE WITH GOOD BATTERIES:

A) Remove batteries, press Reset Switch (SW2) inside

case. (Contact Factory.)

If troubleshooting with manual fails to solve problem, call Geometrics

Inc., Customer Service Department at:

(408) 428-4254 or (408) 428-4236.

PN 16606-02 Rev. X1

GEOMETRICS INC.

G857 Magnetometer

Pocket Reference Guide

NOTE: TUNE BEFORE SURVEYING

TUNING

1. Tune Magnetometer to highest signal value by taking a

reading and then holding [ TUNE ] button down to read

signal strength. Signal strength should be higher than

3.0 at best tuning value.

2. Check repeatability by cycling magnetometer a few

times quickly in one spot. Repeatability should be

better than 1.0 gamma.

3. Set Time, Julian Date and Line Number. Line Number

should not be set to zero.

4. Begin survey.

TROUBLESHOOTING

LAST DIGIT TRUNCATES (blanks out) or poor

repeatability:

A) Check Tuning and Signal Strength.

B) Check cables and connectors for broken contact.

C) Check Auto Cap Tuning Value by pushing

[ AUTO ], [ TUNE ], [ SHIFT ]. Value should read 00.2

for standard cable. Push [ CLEAR ] to escape without

changing values.

D) Check to make sure sensor and cables are not moving

while cycling the unit.

E) Check sensor for broken/loose coils inside. Check

sensor for level of fluid. (Some sloshing is normal.)

(Continued on Back Page)

2190 Fortune Dr., San Jose, CA 95131

Telephone (408) 954-0522

FAX: (408) 954-0902

OPERATION SHORT REFERENCE GUIDE

1. Clearing a key sequence

[ CLEAR ]

2. Taking and storing a reading.

[ READ ], [ STORE ]

3. Recalling from Memory (last reading taken)

[ RECALL ]

4. Recalling from Memory (specific station number)

[ RECALL ], [ SHIFT ], [ (station) # ], [ (station) # ],

[ (station) # ], [ ENTER ]

5. Tuning the magnetometer

[ READ ], [ TUNE ], [ SHIFT ], [ # ], [ # ], [ # ],

[ ENTER ]

6. Erasing data (last reading)

[ READ ], [ RECALL ], [ ERASE ], [ ERASE ]

Erasing data (last group of readings)

[ RECALL ], [ SHIFT ], [ (station) # ], [ (station) #],

[ (station) #], [ ENTER ], [ ERASE ], [ERASE ]

Erasing data (entire memory)

[ RECALL ], [ SHIFT ], [ 0 ], [ ENTER ],

[ ERASE ], [ ERASE ]

7. Reading Time and Line Number

[ TIME ] for current Time and Line Number.

(If Time is pressed while in Recall mode, see #3

above, Time/Line # will reflect when reading is

taken.)

8. Setting Line Number

[ TIME ], [ SHIFT ], [ (line) # ], [ (line) # ],

[ (line) # ], [ ENTER ]

9. Setting Julian Day and Time

[ AUTO ], [ TIME ], [ SHIFT ], [ (day) # ],

[ (day) # ], [ (day) # ], [ (hour) # ], [ (hour) # ],

[ (min) # ], [ (min) # ], [ ENTER ]

10. Starting Output

[ OUTPUT ], [ ENTER ]

11. Stopping Output

[ CLEAR ]

12. Setting Auto Cycle Mode

[ AUTO ], [ SHIFT ], [ (seconds) # ], [ (seconds) # ],

[ (seconds) # ], [ ENTER ]

13. Clearing Auto Cycle Mode

[ AUTO ], [ CLEAR ]

14. Setting GPS Mode On

[ AUTO ], [ FIELD ], [ ENTER ]

15. Setting GPS Mode Off

[ AUTO ], [ FIELD ], [ CLEAR ]

16. Setting Legacy Mode On

[ AUTO ], [ OUTPUT ], [ ENTER ]

17. Setting Legacy Mode Off

[ AUTO ], [ OUTPUT ], [ CLEAR ]

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