The maximum allowable field wiring resistance between the transmitter and the IOTA connection terminal is dependent upon the voltage requirement of the transmitter. The formula for calculating the maximum wiring resistance for the Series C UIO channel used as an analog input is given by the following equation.
Lower Display
Prompt
Upper Display
Range of Setting or Selection
Parameter Definition
REJ FREQ 60HZ
50HZ
REJECTION FREQUENCY – be sure that this selection
agrees with the line voltage frequency.
HF REJ ENABLE
DISABL
HIGH FREQUENCY REJECTION – This selection
allows high frequency noise rejection. It is used to quiet
noisy pens or PV.
ATTENTION
For fast processes it will cause
additional lag.
RELHUMID NO
YES
RELATIVE HUMIDITY – allows you to activate or
deactivate the RH calculation algorithm.
· You must select 100RH input type for two inputs to
measure RH. It requires two 100-ohm RTD inputs so
INPUT 2 must be enabled for this prompt to appear.
· Also, you must select RH for “PEN2IN” which
represents the “wet bulb” temperature when input 2 is
selected.
ATMPRES 590 to 800 mmHg ATMOSPHERIC PRESSURE COMPENSATION – This
prompt only appears if you select “YES” at “RELHUMID”
prompt previously. Select the desired compensation.
DEVIATION
NONE
SETPNT
CHAN1
DEVIATION – selects deviation recording action.
· NONE – No deviation recording
· SETPNT – Records deviation from setpoint
· CHAN1 – Pen 1 records the difference between Input
1 and Input 2.
DEVSETPT –999.0 to 9999 DEVIATION SETPOINT VALUE – sets the desired
deviation setpoint value for deviation recording.
· This prompt only appears if “SETPNT” was selected
at prompt “DEVIATION” previously
