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February 9, 2009

Drilling Monitor

DM – 682/684

DM – 602/604

Instruction manual for repair and inspection

Document No. C25EHZ0100

Koden Electronics Co., Ltd.

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Summary of Contents for DM - 602/604

Page 1: ...0 February 9 2009 Drilling Monitor DM 682 684 DM 602 604 Instruction manual for repair and inspection Document No C25EHZ0100 Koden Electronics Co Ltd ...

Page 2: ...Frequency meter 10 Hz 10 MHz 5 Oscilloscope DC 0 50 MHz 2 CR With 10 1 probe Confirmation of each block This drilling monitor can be divided into the following blocks and each block shall be confirmed a Recorder Power supply unit Various power circuits Motor driving circuit Paper feed motor driving circuit Overvoltage protection circuit b Recorder Logic c Recorder Transmitter and receiver d Interl...

Page 3: ...2 External views and dimensions 1 Recorder unit External view 2 Winch unit External view ...

Page 4: ...f the belt and tension of the belt Rotation detection part P C B HOLE 100 Mo shall be as shown below Adjustment method for tension of the belt Fix the rotation detection PCB to have 0 8 mm 0 03 mm gap between the hole IC and the magnet without up and down of out of alignment Axis of driving pulley 0 5 mm Mounting screws of driving motor Axis of driving motor Mounting screws Loosen the screws c Tur...

Page 5: ...ing in above c turn the Range calibration control dial to 0 and 10 to confirm the following values Specification At position 0 of the dial 2 550 MHz or less At position 10 of the dial 3 150 MHz or more 3 2 Confirmation of recording accuracy Confirm that the line gap of each marker is 5 mm for full width of recording paper When there are many errors vary the VRI on 6000 PCB to set correctly Specifi...

Page 6: ...tch on sub panel b Confirm that the gap of oscillation lines will expand responding to the variance and set it at 009 cm after confirmation 6 Operation of test mode 6 1 After the Mode switch on sub panel is turned to Test side confirm that false signals will be recorded as shown below After conformation turn the switch to MEAS side Oscillation lines Gap between oscillation lines False signals Fals...

Page 7: ...l processing switch on sub panel and connect the oscilloscope to the terminal TP REC of 6000 PCB Set the below setting with VR3 1 kΩ After confirmation turn the switch to off side Thick Thin Standard 10 V 120 V variable range ...

Page 8: ...d recording of Shift switch Record A 0 Record B 50 Record C 100 The relations between positions and ranges of records for Range switch and Shift switch are as follows Shift Range 0 50 100 0 5 m Radius to 0 5 m Radius 0 25 0 75 m Radius 0 5 1 0 m 1 0 m Radius to 1 0 m Radius 0 5 1 5 m Radius 1 0 2 0 m 2 0 m Radius to 2 0 m Radius 1 0 3 0 m Radius 2 0 4 0 m 4 0 m Radius to 4 0 m Radius 2 0 6 0 m Rad...

Page 9: ...movement proportional to depth When sensor stops paper feed will also stop a Lift and lower the sensor at a slow speed b Setting the UP STOP DOWN switch at 1 40 operate for more than 1 minute The gap for 1 m mark shall be 25 mm c Setting the UP STOP DOWN switch at 1 50 1 100 and 1 200 confirm as above At 1 50 the gap of 1 m mark to be 20 mm At 1 100 the gap of 1 m mark to be 10 mm At 1 200 the gap...

Page 10: ...iance of hole wall diameter mark 0 5 m 0 1 9 cm 1 cm gap 1 m 0 or 50 1 2 m 10 cm gap 4 m 0 or 50 1 9 m 1 m gap c It shall be confirmed that the dotted lines will be shifted to right or left depending on the operation of L R Shift switch see above figure d Connect the encoder for recording to pin Nos 7 and 14 of the Winch connector as follows e At switch 1 of 7000 PCB Nos 1 and 8 shall be ON and at...

Page 11: ...ill be displayed on the LED indicator d When it moved 5 m a solid line shall be recorded on recording paper and when it moved 10 m two solid lines shall be recorded e When the Depth mark switch is turned OFF all indications on the LED indicator shall show 0 and no depth marks shall be recorded on recording paper 11 Confirmation of meter indication at power supply and operation of leakage current b...

Page 12: ...e confirmed that the frame of the winch will be recorded on recording paper In the case of DM 682 1 When Direction switch is turned to the X X side it is normal when the 1st echo is recorded Stopping position Frame Sensor element Sensor Range switch 4 m Calibration dial 8 Shift switch 0 Gain knob small Clockwise Full STC knob large Counterclockwise Full Paper speed switch 30 mm min of CONST Direct...

Page 13: ...rection of X X and the 2nd echo in the direction of Y Y When there is no record place two aluminum plates at about 25 cm distance from both side of the sensor element facing each other as shown below and confirm that the 2nd echo will be recorded in the direction of X X Confirmation of gain in the direction of X X 2ndnd echo 1st echo 2nd echo Sensor Aluminum plate Aluminum plate ...

Page 14: ...ing of these knobs clockwise will increase the gain of receiver and turning counterclockwise will decrease the gain By adjusting 4 knobs for X X Y and Y images of wall surface shall be recorded respectively Example 1 Excessive gain disenables separation of oscillation lines and wall surface images and they will be recoded running on DM 682 602 DM 684 604 ...

Page 15: ... reflection from oscillation lines to wall surface By adjusting 4 knobs of X X Y and Y wall surface images shall be recorded respectively When discrimination of oscillation lines and wall surface images is not possible turn the STC knobs counterclockwise to separate the records of oscillation lines and images Example 2 Variation of records when STC is adjusted DM 682 602 DM 684 604 ...

Page 16: ...tment procedure is shown below As for wire side confirm the both right and left sides z When the hold down roller is lifted up wire between A and B shall become straight z Phasing device for wire can be relocated to right and left independently When reached to sea bottom tension of cable shall be adjusted to make this angle to be about 30 degrees 30 degree Cable drum Roller From cable drum to roll...

Page 17: ...eed control knob and to be lowering speed of 20 m min at full clockwise position Dead slow speed at scale 2 shall be also confirmed After connecting the frequency meter with a probe of 10 1 to TP 17 of 7000 PCB set the maximum voltage of motor controller to be 33 Hz max at full clockwise position of the lifting and lowering speed control knob during lowering of the sensor Neglect the fractional pa...

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