Service manual

CAUTION
When removing the sensing head from an operating line,
do not assume that the line is empty or
that the isolation or bypass means is working properly. If an EMC isolation valve is u
sed, be
sure its travel is not limited by any external attachments or other interference and the valve is
closed tightly. No pressure should be felt on the head as the mounting nut is being removed.
ANY PRESSURE FELT WHEN THE NUT IS LOOSENED MUST BE INVE
STIGATED
BEFORE PROCEEDING. Steam should be turned off before attempting to remove the head.
Use a face shield and protective clothing. Stand to the side when removing the sensing head.
Clean all black liquor residue from spud-piece on adapter prior to re-
insertion of sensing head.
The o-ring seal should be replaced before re-installation.
The MPR E-Scan is a microprocessor driven critical angle refractometer. It is used to measure
the refractive index of process fluids which directly correlate with customer request for dissolved
solids. It is equipped with a broad range of diagnostics to aid in fault isolation without the use of
special test equipment. The instrument is calibrated before leaving the factory and should not
need recalibration unless some modification is made to the sensing head. Calibration procedures
are available to change system parameters.
Important Manual Information
The Chapter title is at the top of each page for quick reference through the manual. Important
points, reminders, and warning messages are printed in bordered boxes as:
NOTE: Box indicates important messages.