Honeywell SmartLine ST700, Руководство пользователя

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Page 158
ST 700 Series HART/DE Option User’s Manual
Revision 4.0
18.2.6 % Stress Life
% Stress Life Parameter Description Percent of service life spent in stressful
conditions. Indicates the % of service life
where electronics temperature is within 10%
of respective range limits.% of Service life
spent either in 10% of lower limit range or
10% of upper limit range.
Set-up None.
NVM Backup once each 8 hour period
18.2.7 % Service Life
% Service Life Parameter Description Percent of expected Service Life that device
has been in service. Value is based on
electronics temperature. Service life
accumulates faster at higher temperatures
with an exponential relationship.
Set-up None.
NVM Backup once each 8 hour period
18.2.8 Operating Voltage Diagnostics
Table 46
– Operating Voltage Diagnostics
Current Op
Voltage Parameter Description Operating voltage available at device
terminals.
Set-up None: units always in volts.
NVM none
Note No accuracy is specified for this
measurement.
This value is intended to be used for
informational purposes only and should not
be used for control.
Min Op Voltage Parameter Description Minimum operating voltage experienced by
device at terminals since last reset of
operating voltage parameters.
Set-up User can reset as desired using method
described in item below.
NVM Backup once each 8 hour period
Time Since Last
Voltage Low
Method Description Displays time since last minimum operating
voltage event in minutes.
Set-up User can reset as desired using method
described in item below.
NVM Update every 8 hours.
Reset Operating
Voltage
Parameters Method Description Causes Min Op Voltage to be set to 32
volts and Time Since Last Event to be
reset to zero. Within a short period of time
Min Op Voltage will assume operating
voltage value.
Set-up User actuates as required.