Precision Measurement Engineering, Inc.

Discussing SCAMP Maintenance

HANDLING THE SENSOR COVER

1. To remove the sensor cover, first inspect the water-filled cover to be certain that there are no large bits of foreign matter floating inside. These can snag or damage the microconductivity sensor. Next, remove the plug in the cover end and carefully drain the water from inside the cover. Angle the SCAMP so that the fast conductivity sensor is above the water flow. This helps keep the foreign matter away from this sensor. When all the water is drained, replace the plug so that it does not become lost.
   
   

 

2. Next, carefully unscrew and remove the cover. Do this in a sitting position with the SCAMP rotated so that the Accurate CT sensor is either on the right or left side.  Do this so that the relative slant of the sensor cover, as it comes off the retaining threads, is visible relative to the Accurate CT sensor.  Since the Accurate CT sensor is the farthest sensor from SCAMP's center, it is the most likely sensor to be damaged when removing the sensor cover.  The pictures below show the proper hand position.

Do not shortcut this procedure! If you try to separate the SCAMP from the cover with water in the cover, then you will find yourself holding the cover stationary and lifting the SCAMP away. The SCAMP is heavy and the slightest slip will break sensors.

If it is difficult to loosen the sensor cover, ( SCAMP turns within its outer tube), then don't tighten the SCAMP retaining ring at the release end. Over tightening the retaining ring can pull the endcaps loose and damage them. Instead, open the SCAMP as though you intended to change the batteries and grip the metal support and covers while loosening the sensor cover. Only loosen the cover, don't unscrew it much. Close the SCAMP and then remove the cover. If the cover is removed with the SCAMP open, then some of the residual water within the cover may drip into the exposed electronics.

Replace the cover by reversing the removal sequence.