• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
ASCII TABLE
PART NUMBER CHANGES

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
Page Navigation
  419    420    421    422    423  424  425    426    427    428    429  
TM 5-3895-374-24-2 SECTION 6 - CALIBRATION 6.1 CALIBRATION The controller  is  delivered  from  the  factory  or  distributor  fully  calibrated  and  ready  to  use.    Recalibration  is  not  normally required or recommended but it may be  necessary  in    order  to    meet    plant    operating    standard    or    to    recover    from extraordinary circumstances such as the DATA LOST/PLEASE CAL mode. The term CALIBRATION in this controller includes both a CONFIGURATION procedure and a REFERENCE procedure. The  CONFIGURATION procedure refers to those steps that must be performed to tell the microprocessor details of the application including input, output, control action, alarm, display units, span and time base.  These details are to be keyed through  the  front  keypad  in  a  structured  sequence. The REFERENCE procedure is the more traditional calibration using an external reference source.  A structured program also exists for this calibration.  A calibration loop flow chart in Section 7.4 is available to help explain the controller calibration. Controller  calibration  can  be  performed  at  the  normal  controller  installation  or  on  a  bench.  Only  AC  power  and    an appropriate  input  are  necessary.  If  an  input  is  not  convenient,  a  jumper  between  Terminals  F  and  H  is  adequate  for CONFIGURATION calibration.  REFERENCE calibration requires a precise calibration source for the input signal.  Be sure to cover AC power terminals. CAUTION: COMPUTER DEVICES ARE NON-FORGIVING.  KEY SEQUENCES AND INSTRUCTIONS MUST  BE  FOLLOWED  PRECISELY.    DO  NOT  SKIP  ANY  STEP.    DO  HOT  TURN  OFF POWER WHILE IN CAL LOOP. 6.2 ENTERING CALIBRATION PROGRAM A  security  code  protects  the  calibration  procedure.    To enter   the   calibration   mode   push   the   three   keys   as indicated  in  Figure  6-1  simultaneously.    A  front  key  pad "CAL"  will  illuminate.    If  it  does  not,  push  the  RETURN key and then push the 3 key code again. FIGURE 6-1 6.3 PART NUMBER PN  XX  XX XX  XX  XX The  PART  NUMBER  is  the  first  CAL  loop  display.  If  this  display  does  not  appear,  push  the LAST key until it is on the display.  This 10 digit PART NUMBER fully defines the controller. This controller has been manufactured with specific hardware that determines its input and output capability. The  PART NUMBER  defines  this  capability.  The  PART  NUMBER  also  defines  some  items  that  can  be  changed  by  a  keypad instruction  without  any  hardware  change.  For  example:  In  a  controller  provided  with  thermocouple  input,  the  type  of thermocouple can be changed by a keypad instruction.  However an input cannot be changed to an RTD or process input unless  a  hardware  change  is  also  made.    CONFIGURATION  calibration  deals  specifically  with  those  items  that  can  be changed strictly by a keypad instruction. ECLIPSE INSTRUMENTATION DIVISION page 3-1117







Western Governors University

Privacy Statement
Press Release
Contact

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