U

Instrumentation

20 Formulas • 20

RTD Resistance
IEC 60751
Ω
°C
Thermocouple mV
IEC 60584
°C
Orifice Flow
ISO 5167, AGA Report 3
Pa
kg/m³
Cv Sizing
ISA-75.01.01
m³/hr
bar
Loop Resistance
ISA-50.00.01
V
V
A
Span Percentage
ISA-51.1
Error Percentage
ISA-51.1
Repeatability
ISA-51.1
Hysteresis
ISA-51.1
Deadband
ISA-51.1
Response Time
ISA-51.1
s
s
SIL PFD
IEC 61508/61511
1/hr
hr
SIL RRF
IEC 61508/61511
Pressure Transmitter
ISA-50.00.01
bar
bar
bar
Flow Compensation
AGA Report 3
m³/hr
bar
K
bar
K
DP Flow
ISO 5167
kPa
kg/m³
Level from DP
ISA Handbook
Pa
kg/m³
m/s²
Thermowell Wake Frequency
ASME PTC 19.3 TW
m/s
m
PID Output
ISA-5.1
Air Consumption
ISA-7.0.01
SCFM