Table 5.5 Display Units Options - Honeywell PPT User Manual

D U Display Units Control
Set the Display Units for compensated pressure replies. A USER defined display unit can be set with
this command that causes the pressure output to equal the value input by the
plied by the actual pressure in psi units. (Default:
Inquiry: *dd DU
Action: *ddWE
*ddDU=
Display Unit
AT M ....................... 0.068046 ........................... ambient atmosphere at sea level
BAR ........................ 0.068948 ........................... bar (105 newtons/meter2)
CMWC ................... 70.304 ............................... centimeters of water column (4 °C)
FTWC .................... 2.3065 ............................... feet of water column (4 °C)
I N H G ..................... 2.0360 ............................... inches of mercury (0 °C)
INWC ..................... 27.679 ............................... inches of water column (4 °C)
KGCM .................... 0.070307 ........................... kilograms/centimeter2
KPA ........................ 6.8948 ............................... kilopascal
MBAR .................... 68.948 ............................... millibar (1 hectopascal)
M M H G ................... 51.714 ............................... millimeters of mercury (0 °C) or torr
MPA ....................... 0.0068948 ......................... megapascal
MWC ...................... 0.70304 ............................. meters of water column (4 °C)
PSI ......................... 1.0000 ............................... pounds per square inch
USER ..................... 0.0010000-999.99 ............. user supplied (see also U= command)
LCOM .................... FS=60000 .......................... logic common value (2)
PFS ........................ FS=100.000 ....................... percent of full scale in 0.001% increments
From the CRC Handbook Of Tables For Applied Engineering Science
(1)
LCOM display unit (logic common) automatically switches the digital pressure output to a scale which
(2)
The
has 60000 as the full scale output (±60000 for differential devices). The output will have a decimal point in the
same position that it is in with the original psi scale. For example, when a 10psia device is switched to
DU=LCOM, the full scale digital pressure output will be 60.000, instead of 10.000. Also, a 500psi device will
output full scale at 600.00 instead of 500.00. If the pressure reading was at zero, then no output change will be
seen since zero is the same for any display unit. LCOM provides the highest reading resolution available when
using the standard output format (OP=S).
{ATM |BAR|CMWC
MBAR|MMHG|MPA|MWC|PSI|USER|LCOM|PFS}
PSI Multiplier
(1)
Table 5.5—Display Units Options
DU=PSI)
EEPROM Store: *ddWE
|FTWC|INHG|INWC|KGCM|KPA|
Units Description
4 7
U= command multi-
*ddSP=ALL