User Manual

6 - 4
IPN 074-289L
Composer Operating Manual
6.2.4 Category 4; Installation Related
Table 6-4 Category 4; Installation Related
Failure Symptom Visibility Effect on Accuracy
Acoustically noisy
environment
Noisy C signal Noise on C signal
Electrically noisy
environment
Noisy C signal Noise on C signal
Maximum flow rate
exceeded
Noisy C signal Noise on C signal
Inlet and outlet reversed None None
Ambient temperature
exceeds setpoint
Temperature and
Warning LEDs blink,
Error relay opens
N/A
Low line voltage HALT lamp illuminates N/A
Analog output's load
<2K ohm
None Nonlinear response of
control and C outputs
Noise on or variability of
the analog input
None, (control hunting
not visible without
Monitor software for
viewing)
Proportional to input
variation