Unique Indication/Display Options
The STT850 modular design accommodates a basic
alphanumeric LCD display or a unique advanced graphics
LCD display with many unparalleled features
Industry leading performance
o Digital Accuracy up to +/- 0.10 Deg C for RTD
o Stability up to +/- 0.01% of URL per year for ten
years
o 125 mSec update time for single input models
o 250 mSec update time for dual input models
An optional Digital Output (open collector type) is available
on HART transmitters which can be used to activate
external equipment when preset Alarm Setpoints are
reached. The Digital Output can be set to monitor two
independent setpoints based upon the analog value of the
PV or upon device status.
The following Alarm Types are available:
· PV High
· PV Low
· Critical Diagnostic Active
· Redundant Input Active**
· PV Rate of Change Alarm *
· PV Deviation Alarm *