• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
MULTIPLE RECEIVER INSTALLATION
MODEL A-701 DIGITAL READOUT

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
Page Navigation
  48    49    50    51    52  53  54    55    56    57    58  
TM 5-3895-374-24-2 BULLETIN E-77 MODEL A-701 DIGITAL READOUT INSTALLATION AND OPERATING INSTRUCTIONS SPECIFICATIONS Case Standard 118 DIN Accuracy ± 0.05% of reading Conversion Rate 3 readings/sec. Characters 0.6" LED, 31/2 digit Input Impedance 1000 Meg OHM Power Required 120 VAC Power Consumption 6 watts Integral Power Supply 24 VDC, 50mA Weight 12 oz. INSTALLATION 1)    Case is standard 1/8 DIN size.  To panel mount, cut  a  3.6"  x  1.675"  (92mm  x  43mm)  opening. See figure A. 2)    Remove   front   panel   filter.      Insert   screwdriver blade  in  slot  at  bottom  to   release   catch   and gently pry outward. 3)    Insert  A-701  Digital  Readout  in  panel  opening and install retainer plate from rear. 4)    Slide  mounting  screws  through  reinforcing  clips and then through holes in readout case.  Thread into  tapped  holes  in  retainer  plate  and  tighten until unit is secure. CALIBRATION PROCEDURE Standard  units  are  factory  calibrated  to  read  00.0  with 4mA  DC  input  and  100.0  with  20mA  DC  input,  thus indicating     percentage     of     full     range     pressure     or temperature being sensed by the companion transmitter. To  adjust  for  other  full  range  values  from  500  to  1999 use the following procedure. FIGURE A 1)    Connect  the  readout  in  a  current  loop  with  an accurate milliammeter and a current source. 2)    With  front  panel  filter  removed,  apply  4mA  DC loop  current  and  adjust  zero  control  for  "00.0" reading. 3)    Apply  20mA  DC  loop  current  and  adjust  span control for full span reading.  If unable to reach required  reading  it  may  be  necessary  to  adjust coarse span control located internally behind the span  and  zero  controls.    Disconnect  electrical connector and slide internal assembly out to gain access to this setting. DECIMAL LOCATION To  change  the  location  of  the  decimal  point,  install  a jumper   from   decimal   common   point   to   appropriate terminal  directly  below  the  new  position  selected.    See figure B. FIGURE B (page 3-713)







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.