Cat. # 140CMP - PRICE $2,290
Etchant density controlled to ±0.1 degrees Baume or ±0.001g/ml. Precision replenishment keeps etchant density constant and permits the etching process to be optimized, increasing speed and repeatability, eliminating rework, reducing undercut, and allowing higher metal content. Excellent for fine line etching.
The Model 136 Process Monitor features a large 2-line backlit high-contrast LCD display which shows the complete process status. The upper left portion of the top line displays the actual density value either in degrees Baume or g/ml (user selected). To the right of the density value is the deviation. This is the number of degrees Baume or g/ml above the process control point (indicated by a + sign) or below the process control point (indicated by a – sign). The left side of the bottom line displays the current time and date used for internal data logging. The time and date appear alternately every six seconds. Finally, to the right of the time and date is a mini strip-chart showing the last eight deviation data points. It shows at a glance recent density level trends to help diagnose process problems.
Process Logging & Instant Replay
Etcher process problems are often difficult to diagnose. Each cycle of etcher activity happens over many minutes making it hard to observe and recall accurately. Often the problem occured at some time in the past, perhaps several days ago. An automatic process log which retains process data until it is needed for analysis greatly simplifies process diagnostics. The Model 136 Process Monitor features automatic process logging and instant replay functions. Each time an event occurs (an event is a change in any monitored condition: density, mode, alarm, etc.), the monitor stores the current process status information including the time and date of the event in flash memory. Flash memory is capable of retaining its data without any backup power source.
Process logging goes far beyond mere data logging. Data logging records process variables on a repetitive, timed schedule whether or not there have been changes. Thus it fills much of the memory with the same unchanged data over and over. While it is doing this, if there is any process activity between the data collection times they will not be recorded. Process logging in contrast records every change in process variables and does not waste memory capacity recording that nothing has changed. Replay is much more efficient because the user does not have to wade through repetitive "no change" data sets to sort out the few which are interesting because they show change. All the data sets in the automatic process log show process variable changes.
The 136 monitor can store 100,000 process events, or several months of process data. Once this data is stored, the replay function allows the user to review it. Depressing the << button begins the review, and continued presses increase the speed of the replay. During the replay, the LCD display shows the density, deviation, time, and date of the past events. Also, found in the lower right corner of the LCD are the Pump On indicator (P), Alarm On indicator (A), and the Manual Mode indicator (M). At any point during the rewind, the user can press the >> button to pause the replay. Additional presses of the >> button begin moving forward through the history file or rewind can be continued by pressing the << button again. Pressing the END button will cancel the replay function and return to the current display mode. By reviewing this stored information, the etching process can be better managed and production problems easily identified.
During replay, stored process data is also output to the RS232 port allowing it to be transfered to a PC for more extensive analysis and display.
RS-232 Serial Communication
The Model 136 Monitor features an RS-232 serial communication port. By connecting the cable between the Model 136 Monitor and your personal computer, it is possible to retreive the stored process data. Using an appropriate terminal program, the stored process data is downloaded and saved as an ascii text file which can be either read directly or imported to a spreadsheet program. A Windows Excel template file is supplied which reads the imported text file data and generates a process data report.
Alarm
The Model 136 Monitor features an alarm which activates when the density level goes beyond the tolerance. During the Model 136 setup procedure, the operator can adjust the tolerance to be any displayed deviation. By providing an adjustable alarm tolerance, the monitor can be tailored to match process capability of different etchers. Alarm mode provides audible indication of possible problems. The alarm thresholds should be set low enough to provide process control warnings before scrap is generated. Additionally, the alarm will sound if the replenisher pump(s) have run for more than five minutes continuously. The Alarm Cancel button allows the user to silence the alarm for a period of five minutes while the situation is corrected. Additionally, the alarm is inhibited during startup while control chamber fills. This prevents unnecessary alarming. An alarm condition means any of the following has been detected:
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AVAILABLE SPARE PARTS FOR MODEL 140: |
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| Cat. # | Description | Price | ||
| 124 | Model 124 Etchant Controller (w/o electronics) | $560 | ||
| 124FLT | Model 124 Replacement Float Kit | $75 | ||
| 124/5 | Encoder Circuit Board (with cable) | $325 | ||
| 124/5ENC | Encoder Card for 124/5 | $25 | ||
| 140MAN | Model 140 Instruction Manual | $2 | ||
| 136 | Model 136 Monitor | $990 | ||
| 136-W | RS-232 Serial Cable | $25 | ||
| 120-P | Model 120 Power Module | $390 | ||
| 120-1 | Power Module Mother Board | $126 | ||
| 120-2 | Power Module Circuit Board | $180 | ||
| 120-3 | Power Module Relay Board | $34 | ||
| 140EXT | Extension Cable | $30 + .25/ft. | ||
NOTE:
Same day shipping
available on most orders for spare parts.
