Related Manuals for Koden DM – 682/684
Summary of Contents for Koden DM – 682/684
- Page 1 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 Measuring instruments to be prepared: The following instruments shall be prepared for inspection: (1) Variable voltage transformer: Variable between 80 - 280 V with 150 VA or more (2) Ammeter: AC: 0 – 10 A, DC: 0 - 2 A (3) Digital voltmeter: AC: 0 –...
- Page 3 External views and dimensions 1. Recorder unit (External view) 2. Winch unit (External view)
- Page 4 Recorder a. Adjustment of belt driving part Axis of driving motor Mounting screws of driving motor ⋆ ± 0.5 mm Axis of driving pulley a-1 Loosening the mounting screws of driving motor, adjust the mounting position of the driving motor. Rotate the driving motor by hand and adjust the tension of the belt to have approximately ±...
- Page 5 3. Accuracy (Horizontal direction) 3-1. Receiving clock a. Set the scale of “Range calibration control dial” on the control panel at 8. b. Connect a frequency meter to TP-22 on 7000 PCB (for DM 602/4, TP-23 on C25-7000B PCB) (Use a probe of 10:1) c.
- Page 6 4. Rejection of oscillation lines Turn on the “Oscillation line rejection switch”. Confirm that oscillation lines will disappear as shown below (Switch off after confirmation) Oscillation lines 5. Operation of zero position setting switch (Set at 009 cm) Vary the TD Width switch on sub-panel. Confirm that the gap of oscillation lines will expand responding to the variance, and set it at 009 cm after confirmation.
- Page 7 6-2. Turn on the “Signal 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. Thick Thin Standard: ± 10 V 120 V (variable range) After confirmation, turn the switch to off side.
- Page 8 7. Operations of RANGE and SHIFT, and status of write-in of recoded letters 7-1. Confirm that numerical figures and characters will be displayed at every switching-over of “RANGE” and “SHIFT” switches. Displaying locations: DM-682/602: Recorded at the right side DM-684/604: Recorded at the center Example: R = 2 M, S = 0 %, Range switch...
- Page 9 8. Paper feed 8-1. Paper feed speed operation “Const” Turn on the “Paper speed” switch to Const 60, 30, 15 and 7.5 mm/min, and confirm the feed width of paper per one minute. Specification: At 60 mm/min: ± 2 mm At 30 mm/min: ±...
- Page 10 9. Operation of hole wall diameter marks a. By turning the “Width marker” switch on right panel, it shall be confirmed that the records of dotted lines will change. Hole wall diameter mark Set value b. The gap between hole wall diameter marks shall be confirmed to be matched with the set value (see above figure).
- Page 11 Confirmation on records: By rotating the encoder. Mark at every 1 m: Mark at every 5 m: Double mark at every 10 m. This is double thick record per each 5m. Depth value records: To confirm 0, 5, 10, 15, ………., up to 30m Record the following marks by Winch up/down switch operation: : Stop mark : Up mark...
- Page 12 12. Confirmation of gain in air a. The sensor shall be held at the position as shown in the figure below. Frame Sensor Sensor element Stopping position b. Set the switches and knobs on the control panel as follows: Range switch………………..< 4 m > Calibration dial………………<...
- Page 13 When “Direction” switch is turned to the < Y – Y’ > side, it is normal when the 2nd echo is recorded. 2ndnd echo In the case of DM-684: It shall be confirmed that the 1st echo is recorded in the direction of < X – X’ > and the 2nd echo in the direction of <...
- Page 14 13. Confirmation of “Gain control” knobs and STC knobs operation 13-1. Confirmation of “Gain control” knobs This will be performed by “Gain control” knobs. Turning 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.
- Page 15 13-2 Confirmation of STC knobs This will be performed by STC knobs. Turning of these knobs clockwise will reduce the gain near oscillation lines resulting in elimination of diffused 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.
- Page 16 14. Operation of phasing devices for winch (for cable drum, wire drum) a. By lifting and lowering the sensor, the cable and the wire shall be wound on the drums respectively without overlapping, making neat layers. (Confirm at high-speed and low-speed). b.
- Page 17 15. Confirmation of mounting direction of transducer Y’ a. Plates to show X, X’, Y and Y’ directions shall be confirmed to have been affixed correctly. b. It shall be confirmed that when a metal plate such as a tab X’...
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