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        ST 3000 Smart Transmitter Specification and Model Selection Guide
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1.     Vent Drains are Teflon coated for lubricity     Tr ACTOmTmImoou    e   e   e   e   e   e   e   e   e                   34 ST 03 65  Page 13    Model Selection Guide  continued       Availability  STD9    TABLE 1   OPTIONS Selection  None  Adapter Flange   1 2  NPT St  Steel  Adapter Flange   1 2  NPT Hastelloy C  Adapter Flange   1 2  NPT Monel  Modified DIN Process Heads   316SS  Viton Head Gaskets  1 2  adapter gaskets are special   Mounting Bracket   Carbon Steel  Mounting Bracket   ST  ST   Flat Mounting Bracket   Carbon Steel  316 ST ST  Electronics Housing with M20 Conduit Connections  1 2  NPT to M20 316SS Conduit Adapter  BASEEFA EEx d IIC   1 2  NPT to 3 4  NPT 316 SS Conduit Adapter  Lightning Protection  Analog Meter  0 100 Even 0 10 Square Root   Smart Meter  Local Zero  Local Zero and Span  A286SS  NACE  Bolts and 302 304SS  NACE  Nuts for Heads and  316SS  NACE  Bolts for Adapters  Stainless Steel Customer Wired On Tag   4 lines  28 characters per line  customer supplied information   Stainless Steel Customer Wired On Tag  blank   Custom Calibration and I D  in Memory  Transmitter Configuration  Write Protection  Additional Warranty   1 year  Additional Warranty   2 years  Additional Warranty   3 years  Additional Warranty   4 years  Clean Transmitter for Oxygen or Chlorine Service with Certificate  Over Pressure Leak Test with F3392 Certificate  Side Vent Drain  End Vent Drain is standard   SS Center Vent Drain and Bushing  Blind DIN SS Flanges Mounted with
2.    0 25  of span   Temperature Effect per 28  C For URV below reference point  50 inH20   effect equals   50  F    50   0 10   0 15  oem   or 20 10  015  AERA  in ac   0 10   0 15 span inH2O or  0 10  0  span mbar in   span    In Digital Mode   0 225  of span   For URV below reference point  50 inH2O   effect equals     50 inH2O 125 mbar A      0 075   0 15 tons or  0 075   0 15           span       Zero Static Pressure Effect           0 1625  of span   1000 psi  70 bar  For URV below reference point  50 inH2O   effect equals     50 inH20 125 mbar      span mbar j       span     0 0125   0 15      or  0 0125   0 15    span inHo       Combined Zero and Span Static    0 30  of span   Pressure Effect per 1000 psi  70   For URV below reference point  50 inH2O   effect equals     bar      50 inH2O 125 mbar       0 15   0 15         or   0 15   0 15 rame  in   span    Stability  0 03  of URL per year        Performance specifications are based on reference conditions of 25  C  77  F   zero  0  static pressure  10 to 55  RH  and  316L Stainless Steel barrier diaphragm              34 ST 03 65  Page 5    Performance Under Rated Conditions    Model STD930  0 to 100 psi 7000 mbar           Upper Range Limit psi 100  bar 7   Minimum Span psi 5  bar 0 35    Turndown Ratio       Zero Elevation and Suppression      5 to  100  URL        Accuracy  Reference     Includes In Analog Mode   0 10  of calibrated span or upper range value  URV   whichever    combined effects of linearity  is grea
3.   Memory  Option CC    The factory can calibrate any range  within the scope of the transmitter   s  range and enter an ID tag of up to  eight characters in the transmitter   s  memory     FOUNDATION Fieldbus   Option FF    Equips transmitter with FF  protocol for use in 31 25 kbit s  FF networks  See document  34 ST 03 72 for additional  information on ST 3000  Fieldbus transmitters     Specifications are subject to change without notice    Note that specifications may differ slightly for transmitters manufactured before    October 30  1995         34 ST 03 65  Page 11    Ordering Information    Contact your nearest Honeywell  sales office  or    In the U S    Honeywell  Industrial Automation  amp  Control  16404 N  Black Canyon Highway  Phoenix  AZ 85023  1 800 288 7491    In Canada   The Honeywell Centre  155 Gordon Baker Rd   North York  Ontario  M2H 3N7  1 800 461 0013    In Latin America   Honeywell Inc   480 Sawgrass Corporate Parkway   Suite 200  Sunrise  FL 33325   954  845 2600    In Europe   Honeywell PACE  1  Avenue du Bourget  B 1140 Brussels  Belgium   32 2  728 2111    In Asia   Honeywell Asia Pacific Inc   Room 3213 25  Sun Hung Kai Centre  No  30 Harbour Road  Wanchai  Hong Kong  2829 8298    In the Pacific   Honeywell Limited  5 Thomas Holt Drive  North Ryde NSW 2113  Australia   61 2  9353 7000    Or  visit Honeywell on the World  Wide Web at   http   www honeywell com    34 ST 03 65    Page 12       Model Selection Guide 34 ST 16 24    Instructions   e Sel
4.  Available With  Letter   Table       Selection _   Table     Selection          a Approval Body pending                         b Select only one i from this                 Se                     e   m   ica 3 Nox         Ep                                    ELI  9 P E NA   cs side vent   no price add   h  j  k     re  m   ea ea 3     T w 152 5    T     or BS es o  7      ee   eS  oe  s dudar oer lo e onc Mb           1  t I Select from Table III S2    2  V2 c cu  u   nm         H G2    j  b             Includes side vent drain   no price add  w       E AF AG AH A TT SV  x  y    J__  includes  side vent  no price add    Note  See 13 ST 27 for Published Specials with pricing    See 13 ST 29 and User   s Manual for part numbers    See 13 ST OE 9 for OMS Order Entry Information including TC  manuals   certificates  drawings and SPINS    See 13 ST OD 1 for tagging  ID  Transmitter Configuration  TC  and  calibration including factory default values    To request a quotation for a non published  special   fax RFQ to Marketing  Applications           34 ST 03 65  Page 16    Honeywell    Industrial Automation and Control  Honeywell Inc    16404 North Black Canyon Highway  Phoenix  Arizona 85023 3099    
5.  NACE Bolts  Low Temperature    50  C Ambient Limit  Calibration Test Report and Certificate of Conformance  F3399   Certificate of Conformance  F3391   Certificate of Origin    0195   NACE Certificate  F0198               Protocol Compatible Electronics  FOUNDATION Fieldbus Communications    e   c  c  c   w  2      e   e    m  n  u  e   e   e   x  S  e     enxe               83                                Q  Q Q o        008080         lt  o     0 99990909      009                  o     o 0000             34 ST 03 65       Page 14  Model Selection Guide  continued  Availability  STD9     TABLE 11   OPTIONS  continued  Selection 24 30  74  Approval       Body Approval Type Location or Classification  No hazardous location approvals  Factory  Mutual    Intrinsically Safe Class 1  Il  Ill  Div  1  Groups  A B C D E F G  Explosion Proof Class I  Div  1  Groups B C D  CSA Dust Ignition Proof Class Il  III  Div  1  Groups E F G    Intrinsically Safe Class     Il  Ill  Div  1  Groups  A B C D E F G  Zone 2 Self Declared Ex Il3 GD T       X   Europe  per 94 9 EC  1  T4 at Tamb  93  C  T5 at Tamb      ATEX4  80  C  T6 at Tamb  65  C    SA   Australia            Emaxm   LL  LCIE Intrinsically Safe EEx ia IIC T5  CENELEC  Flame Proof  EExdicTe   _ 3D          Intrinsically Safe  EExialicTS   oas             TABLE IV   Factory Identification XXXX elele    34 ST 03 65  Page 15    Model Selection Guide  continued       RESTRICTIONS    Restriction        Available Only With         Not
6.  engineering units     Lightning Protection   A terminal block is available with  circuitry that protects the  transmitter from transient surges  induced by nearby lightning  strikes     HART Protocol Compatibility   Option HC    An optional electronics module is  available for the Series 900 that  provides HART Protocol  compatibility  Transmitters with the  HART Option are compatible with  the AMS System   Contact your  AMS Supplier if an upgrade is  required      Configuration of the HART Option    transmitter is accomplished using a  Universal HART Communicator  For    full functionality the communicator    must contain the Honeywell Device    Description  DD   Contact your  nearest Honeywell office or  distributor for further information  regarding this option     Tagging  Option TG    Up to 30 characters can be added  on the stainless steel nameplate  mounted on the transmitter   s    electronics housing at no extra cost     Note that a separate nameplate on  the meter body contains the serial  number and body related data  A  stainless steel wired on tag with  additional data of up to 4 lines of 28  characters is also available  The  number of characters for tagging  includes spaces     Transmitter Configuration   Option TC    The factory can configure the  transmitter linear square root  extraction  damping time  LRV   URV and mode  analog digital  and  enter an ID tag of up to eight  characters and scratchpad  information as specified     Custom Calibration and ID in
7.  milliampere  output transmitter in use today   and operates over a standard  two wire system     The measuring means is a  piezoresistive sensor which  actually contains three sensors in  one  It contains a differential  pressure sensor  a temperature  sensor  and a static pressure  sensor  Microprocessor based  electronics provide higher span   turndown ratio  improved  temperature and pressure  compensation  and improved  accuracy     Like other Smartline Transmitters   the ST 3000 features two way  communication between the opera   tor and the transmitter through our  SFC  You can connect the SFC  anywhere that you can access the  transmitter signal lines  and it pro   vides the capabilities of transmitter  adjustments and diagnostics from  remote locations  such as the control  room     The transmitter   s meter body and  electronics housing resist shock   vibration  corrosion  and moisture   The electronics housing contains a  compartment for the single board  electronics  which is isolated from an  integral junction box  The single   board electronics is replaceable and  interchangeable with any other   ST 3000 Series 900 or Series 100e  model transmitter     _Operating Conditions     All Models    Specifications    34 ST 03 65  Page 3       Transportation and                               Parameter Reference Rated Condition Operative Limits  Condition Storage   at zero static        F        c   F c      Ambient Temperature 25  1   77  2    40to 85    40 to 185    40 
8. CTFE  Chlorotrifluoroethylene        Electronic Housing    and NEMA 7  explosionproof   Stainless steel optional     Epoxy Polyester hybrid paint  Low Copper Aluminum  Meets NEMA 4X  watertight        Process Connections  Wiring    Mounting    Dimensions    Net Weight    Can be mounted in virtually any position using the standard mounting bracket  Bracket    9 pounds  4 1 Kg     1 4 inch NPT  1 2 inch NPT with adapter  standard option  DIN   Accepts up to 16 AWG  1 5 mm diameter      is designed to mount on 2 inch  50 mm  vertical or horizontal pipe  See Figure 3     See Figures 4 and 5           Approval Bodies       Approved as explosionproof and intrinsically safe for use in Class 1  Division 1  Groups  A  B  C  D locations  and nonincendive for Class     Division 2  Groups A  B  C  D  locations  Approved EEx ia IIC T5 and EEx d IIC T6 per CENELEC standards  and Ex  N II T5 per BS 6941     Series 900 with HC  HART  compatibility is self certified for Zone 2  T5  maximum  42V 22 mA        34 ST 03 65  Page 8          Figure 3   Examples of typical mounting positions       24264       34 ST 03 65  Page 9          millimeters    Reference Dimensions  inches                  With  Smart       meter    Removal  Clearance 53 1 65 1  for All Caps 2 09     2 56  45 7 Without Without  1 8 meter meter  23 5  7925  Optional  M  Optional SoS  external  ground  Rotational  Optional Adapter  for 1 2 inch NPT 32 5 93 6  See Detail  A  1 28 3 69  Detail A    Low Pressure  Connection  1 2 
9. Honeywell       ST 3000 Smart Transmitter    Series 900 Differential Pressure Models    34 ST 03 65   10 99   Specification and  Model Selection  Guide    0 to 1 000 mbar    0 to 7 000 mbar  0 to 210 000 mbar             STD924    to 400 inH2O   STD930 0 to 100 psi   STD974    to 3000 psi  Function    Honeywell s ST 30009 Series 900  Differential Pressure Transmitters  bring proven  smart  technology to  a wide spectrum of pressure mea   surement applications including  flow and liquid level  They transmit  an output signal proportional to the  measured variable in either an  analog 4 to 20 milliampere format  or in a digital DE protocol format for  direct digital integration with our    TDC 30009X control System   Additional protocol options  available for the ST 3000 Series  900 transmitters include  FOUNDATION    Fieldbus  and    HART     See the Model Selection  Guide for help in selecting the  correct ordering code for the  desired protocol     In the standard transmitter you  easily select the analog or digital  transmission format through the    Smart Field Communicator  SFC     which is the common hand held  operator interface for our DE based    Smartline   Transmitters  All con   figuration  operation  and commu   nications functions are under the  control of the ST 3000 Smart  Transmitter s microprocessor and  are accessible through the SFC     1 FOUNDATION    Fieldbus is a trademark  of the Fieldbus Foundation      HART is a registered trademark of the  Hart Commu
10. dard reference temperature for inH2O range    mbar 1000  Minimum Span inH2O 10 Note  Recommended minimum span in square root mode is 20 inHoO  50 mbar    mbar 25  Turndown Ratio 40 to 1       Zero Elevation and Suppression      5 to  100  URL        Accuracy  Reference     Includes In Analog Mode   0 10  of calibrated span or upper range value  URV   whichever is  combined effects of linearity  greater  terminal based        hysteresis  and repeatability  For URV below reference point  25 inHoO   accuracy equals     Accuracy includes residual error 25 inH2O 62 mbar      after averaging successive  0 05   0 05    span inH2O or  0 05   0 05        in   span   readings    g In Digital Mode   0 075  of calibrated span or upper range value  URV   whichever     For FOUNDATION Fieldbus use is greater  terminal based    Digital Mode specifications  For                   use Analog Mode For URV below reference point  25 inH2O   accuracy equals    specifications  25 inH2O 62                0 025   0 05  span inH2O inH2O or  0 025   0 05 ES id in   span   Zero Temperature Effect per In Analog Mode   0 1625  of Span   28  C  50  F  For URV below reference point  50 inH2O   effect equals     12          0 0125   0 15 t  in   span    In Digital Mode   0 15  of span   For URV below reference point  50 inH2O   effect equals     50 inH2O   0 15                0 15                             50 inH20   0 0125   0 15  span inH2O       span inH2O span mbar  Combined Zero and Span In Analog Mode
11. e Under Rated Conditions   General for all Models    Parameter    Output  two wire     FOUNDATION Fieldbus and HART protocol     Description    Analog 4 to 20 mA or DE digital communications mode  Options available for       Supply Voltage Effect    0 005  span per volt           Damping Time Constant   CE Conformity  Europe   Lightning Protection Option   Code    LP            rise decay  10 1000    sec  250 Amps  1000 strikes  500 Amps  400 strikes     Adjustable from 0 to 32 seconds digital damping    89 336 EEC  Electromagnetic Compatibility  EMC  Directive    Leakage Current  10 microamps max    42 4 VDC  93  C   Impulse Rating  10 20    sec  5 000 Amps  50 strikes  10 000 Amps  20 strikes        _Physical and Approval Bodies       Parameter    Barrier Diaphragms Material  STD924  STD930  STD974    Process Head Material  STD924  STD930  STD974    Head Gaskets    Meter Body Bolting     NACE  nuts for heads and 316 SS  NACE  bolts for adapters  standard option      Description    316L SS  Hastelloy C 276  Monel  Tantalum  316L SS  Hastelloy C 276    316 SS  Carbon Steel  zinc plated   Monel  Hastelloy  316 SS  Carbon Steel  zinc plated   Hastelloy    Teflon  Viton  Only with 316L SS or Monel barrier diaphragms   Carbon Steel  Zinc plated  standard  or A286 SS  NACE  bolts and 302 304 SS       Mounting Bracket    Carbon Steel  Zinc plated  or Stainless Steel angle bracket or Carbon Steel flat  bracket available  standard options         Fill Fluid    Silicone DC 200 oil or 
12. ect the desired Key Number  The arrow to the right marks the selection available    e Make one selection from each table    and Il  using the column below the proper arrow   Select as many Table Ill options as desired  if no options are desired  specify 00    A dot denotes unrestricted availability  A letter denotes restricted availability   Restrictions follow Table IV              Key Number          Optional  IV  MES           leas aer Xxx    KEY NUMBER Selection Availability  pan  0 10  to 0 400    20 0 25 to 0 1000 mbar STD924 Y  Body Rating  3000 psi  210 bar   0 5 to 0 100 psi 0 0 34 to 0 7 bar STD930 VY  Body Rating  3000 psi  210 bar   0 100 to 0 3000 psi 0 7 to 0 210 bar STD974 Y    Body Rating  3000 psi  210 bar        TABLE     METER BODY    Wetted Vent Drain  Process Heads Valves    Barrier  and Plugs Diaphragms    Carbon Steel    316 St  St  316 LSS   Carbon Steel   316 St  St  Hastelloy C   Carbon Steel    316 St  St  Monel  Material Carbon Steel    316 St  St  Tantalum  of   St  316 St  St  316 LSS  Construction   St  316 St  St  Hastelloy C    316 St  St  Monel   316 St  St  Tantalum  Hastelloy C Hastelloy C Hastelloy C  Hastelloy C Hastelloy C Tantalum  Monel Monel Monel    Fill Fluid sla  CTFE A   Process Head 1 4  NPT __     Configuration 1 2  NPT with Adapter  on 1 4  NPT Head  __H    TABLE II   No Selection 00000 Telefe       Carbon Steel heads        zinc plated    Not recommended for water service due to hydrogen migration   Use Stainless Steel heads  
13. essure Effect per 1000 psi  70   For URV below reference point  30 psi   effect equals     ii  0 15   0 15 30 psi     0 15   0 15    2bar_        0 15 0  span psi 9    0 15   0  span bar   in   span          Stability  0 04  of URL per year      Performance specifications are based on reference conditions of 25  C  77  F   zero  0  static pressure  10 to 55  RH  and  316L Stainless Steel barrier diaphragm     34 ST 03 65  Page 6    Performance Under Rated Conditions    Model STD974  0 to 3000 psi 210 bar           Turndown Ratio    Zero Elevation and Suppression    Parameter Description  Upper Range Limit psi 3000           210  Minimum Span psi 100  bar  7    30 to 1     0 6 and  100  URL           Accuracy  Reference     Includes  combined effects of linearity   hysteresis  and repeatability       Accuracy includes residual error  after averaging successive  readings       For FOUNDATION Fieldbus use  Digital Mode specifications  For  HART use Analog Mode  specifications     Zero Temperature Effect per  28      50         Combined Zero and Span  Temperature Effect per 28  C   50   F     In Analog Mode   0 2  of calibrated span or upper range value  URV   whichever is  greater  terminal based     For URV below reference point  300 psi   accuracy equals     300 psi 21bar A      0 05   0 15        psi or  0 05  0 15 span bar in   span    In Digital Mode   0 175  of calibrated span or upper range value  URV   whichever  is greater  terminal based     For URV below reference poi
14. inch NPT    High Pressure   Connection  1 2 inch NPT       24258            Figure 4   Typical models STD924 and STD930 A      E  F  J  SS  Hastelloy     mounting dimensions for    reference     34 ST 03 65  Page 10       Ref Di _    millimeters  eference Dimensions     niches             for All Caps    With Smart meter  lt   929  mE With    5 Analog  Removal 65 1 a  2 56  Clearance 257   Without  meter   meter        Optional  external    266 6 ground    Optional Adapter for  1 2 inch NPT  See Detail  A     Connection  1 2 inch NPT          O  1  128 us Detail A       135 3 6  Eas        Plug        Low Pressure  Connection  1 2 inch NPT    32 0 14    Optional  meters    Rotational lock    24259       mounting dimensions for reference    Figure 5   Typical models STD924 and STD930 C  D  G  H  K  L  Monel  Tantalum   and model STD974       Options    Mounting Bracket   The angle mounting bracket is  available in either zinc plated  carbon steel or stainless steel and  is suitable for horizontal or vertical  mounting on a two inch  50  millimeter  pipe  as well as wall  mounting  An optional flat  mounting bracket is also available  in carbon steel for two inch  50  millimeter  pipe mounting     Indicating Meter   Two integral meter options are  available  An analog meter  option  ME  is available with a 0 to 100   linear scale  The Smart Meter   option SM  provides an LCD  display for both analog and digital  output and can be configured to  display pressure in pre selected 
15. nication Foundation       ST 3000  Differential Pressure Transmitter                                                             Models   STD924  STD930  STD974    Smart Field  Communicator    Can be ordered  Separately see  specification  34 ST 03 55          Figure 1    Series 900 Differential Pressure Transmitters feature proven   smart  technology and come in several models to meet varying application  needs        Industrial Automation and Control  16404 N  Black Canyon Highway  Phoenix  AZ 85023    Printed in U S A     Copyright 1998     Honeywell Inc     34 ST 03 65  Page 2    Features    Choice of linear or square root  output conformity is a simple  configuration selection     Direct digital integration with    TDC 3000X system provides  local measurement accuracy to  the system level without adding  typical A D and D A converter  inaccuracies     Unique piezoresistive sensor  automatically compensates  input for temperature and static  pressure     Added    smart    features include  configuring lower and upper  range values  simulating  accurate analog output  and  selecting preprogrammed  engineering units for display     Smart transmitter capabilities  with local or remote interfacing  means significant manpower  efficiency improvements in  commissioning  start up  and    ongoing maintenance functions     Local zero and span  adjustments are available for  alternate adjustment method  if  desired     Description    The ST 3000 transmitter can  replace any 4 to 20
16. nt  300 psi   accuracy equals     300 psi 21bar X      0 025   0 15 fret psi   9   0 025  0 15 span bar          span    In Analog Mode   0 2125  of span   For URV below reference point  500 psi   effect equals     500 psi 35bar Y      0 0125   0 20 ee psi or  0 0125   0 20 span bar in   span    In Digital Mode   0 20  of span   For URV below reference point  500 psi   effect equals      0 20     or  0 20  cancer  in   span       In Analog Mode   0 325  of span   For URV below reference point  500 psi   effect equals     500 psi   5        X      0 125   0 20      psi or 0 125   0 20 span bar in   span    In Digital Mode   0 30  of span   For URV below reference point  500 psi   effect equals     500 psi 35        A      0 10   0 20 7 psi or  0 10   0 20 span bar in   span       Zero Static Pressure Effect per  1000 psi  70 bar      0 1625  of span   For URV below reference point  500 psi   effect equals     500 psi 35        Y      0 0125   0 15   span psi or  0 0125   0 15 span bar in   span       Combined Zero and Span Static  Pressure Effect per 1000 psi  70  bar         0 30  of span   For URV below reference point  500 psi   effect equals     500 psi 35               0 15   0 15 Ee psi or   0 15   0 15 span bar in 96 span    Stability  0 03  of URL per year           Performance specifications are based on reference conditions of 25  C  77  F   zero  0  static pressure  10 to 55  RH          316L Stainless Steel barrier diaphragm        34 ST 03 65  Page 7    Performanc
17. ter  terminal based    hysteresis  and repeatability  For URV below reference point  20 psi   accuracy equals      20 psi 1 4        X          0 05   0 05           or  0 05   0 05    bar   in   span    In Digital Mode   0 075  of calibrated span or upper range value  URV   whichever  is greater  terminal based     For URV below reference point  20 psi   accuracy equals     20 psi 1 4        Y      0 025   0 05 E 7 or  0 025   0 05 feo bar   i    span    Zero Temperature Effect per In Analog Mode   0 1625  of span   28  C  50  F  For URV below reference point  30 psi   effect equals     30 psi 2bar Y      0 0125   0 15              0 0125   0 15        bar   in   span    In Digital Mode   0 15  of span   For URV below reference point  30 psi   effect equals      0 15  Guanes  or  0 15  quanta in   span       span psi span bar  Combined Zero and Span In Analog Mode   0 25  of span        Effect        28  C For URV below reference point  30 psi   effect equals   30 psi 2 bar jin   0 10 0 15 es s  or  0 10   0 15 Carn bar   in   span    In Digital Mode   0 225  of span   For URV below reference point  30 psi   effect equals     30 psi 2bar X       40 075   0 15      s  or  0 075   0 15 E bar   in   span       Zero Static Pressure Effect           0 1625  of span   1000 psi  70 bar  For URV below reference point  30 psi   effect equals     30 psi 2bar X     40 0125   0 15   span   or  0 0125   0 15   span bar        span       Combined Zero and Span Static    0 30  of span   Pr
18. to 85    40 to 185   55 to 125   67 to 257  Meter Body Temperature 25  1   77    2    40to 110     40 to 230     40 to 125    40 to 257   55 to 125   67 to 257  Humidity  RH 10 to 55 0 to 100 0 to 100 0 to 100  Overpressure psi 0 3000   3000    bar 0 210   210    Vacuum Region   Minimum  Pressure  mmHg absolute Atmospheric 25 2  short termt   inH2O absolute Atmospheric 13 1  short termt  Supply Voltage  Current  Voltage Range  10 8 to 42 4 Vdc at terminals  and Load Resistance Current Range  3 0 to 21 8 mA  Load Resistance  0 to 1440 ohms  as shown in Figure 2                For CTFE fill fluid  the rating is  15 to 70  C  5 to 158        For models STD924 and STD930  static limit is 2000 psi  140 bar  for temperatures below    15      5  F   Overpressure is        T Short term equals 2 hours at 70  C  158 F           1440  1200      Operating            Loop NOTE  A minimum of 250  Resistance      Ohms of loop resistance is  necessary to support   ohms  650 communications  Loop  resistance equals barrier  resistance plus wire  450 resistance plus receiver  resistance  Also 45 volt  operation is permitted if  250 not an intrinsically safe  installation   0 10 8 16 28 20 63 25 28 3 37 0 42 4  Operating Voltage  Vdc  21012            Figure 2   Supply voltage and loop resistance chart       34 ST 03 65  Page 4    Performance Under Rated Conditions    Model STD924  0 to 400 inH20 1000 mbar                 Parameter   Description  Upper Range Limit inH2O 400  39 2  F 4  C is stan
    
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