美国SDI压力监测仪90061

 general description: 

                  this instrument is used for measuring the peak force of a spot welder.  the top of the handle has 
         one switch that is used to turn the instrument on and to reset the display to zero.  the three plugs on the 
         handle     are  removed     to  access   the  shunt   calibration  switch,   analog   output   and   the  adjustment 
         potentiometer.

                  the standard full scale ranges of the sensor are 300, 1000, 3000, 5000 and 10,000 pound 
         capacity.  an optional kilogram display is available if specified by the customer.  the instrument features 
         an automatic shut-off (in track mode only) after approximately 75 seconds.  there are 6 standard aa-size 
         batteries which power the unit and will provide approximately 50 hours of continuous use.  a built-in low 
         battery indicator fades the right-most display digit.

         operating procedures: 
         1.       if possible, turn off current supply to weld electrodes.        (new aluminum head system contains 
                  insulated inserts to prevent current flow if this step is omitted.) 
         2.       adjust   the   screw   to   a   snug   fit   so   the   probe   head   will   move   (if   necessary)   to   align   itself 
                  perpendicular to the force applied. 
         3.       depress the on/reset button to activate the probe, depress it again to clear the lcd. 
         4.       insert the probe head between the electrodes using care to line up the contact points of the 
                  electrodes with the probe head. 
         5.       activate the electrode. 
         6.       deactivate the electrodes and remove the probe. 
         7.       clamp force displayed in units as shown on calibration label of sensing element. 
         8.       for additional measurements, clear the display before applying force.

         calibration adjustment: 
                  the unit has an auto-zero circuit incorporated to null any initial offset, providing a true applied 
         force measurement.  the shunt calibration can be applied by removing the right plug from the handle and 
         pressing the switch with a screwdriver.  the value of the shunt calibration will be displayed on the lcd. 
         removing the left plug will allow access to the adjustment potentiometer.

         battery: 
                  the units digit of the display will blank out when the batteries are low on the standard weld probe. 
         battery replacement requires six (6) aa-size alkaline batteries. to remove the batteries, unfasten the #6 
         socket head cap screw and washer located in the recessed threaded cavity of the end cap as shown in 
         figure 1.  the batteries should then be inserted according to the polarity indicated on the removable end 
         cap.  the polarity shown indicates the orientation of the battery with respect to the end cap. refasten the 
         end cap to the handle without over-tightening the screw and washer.