Red Lion TCU - Manual (Page 94)

Analog Output Calibration (ANCL) (Cont’d)
0 to 10 VDC
Press PAR until ANCL appears in the display. Connect a precision
voltmeter (0.1% accuracy) to rear terminals (+) #11 and (-) #12.
Display Parameter Description/Comments
ANC1 Analog output 0 VDC
code value Observe voltage reading. If 0.00 VDC,
press PAR. If not equal, modify existing
code value using up and down buttons to
achieve 0.00 VDC. Press PAR.
ANC2 Analog output 10
VDC code value Observe voltage reading. If 10.00 VDC,
Press PAR. If not equal, modify existing
code value using up and down buttons to
achieve 10.00 VDC. Press PAR.
Second Analog Input Calibration (2CAL)
The signals applied to the Second analog Input for calibration depend on
the type of model. Second Analog Input, Heater Current Monitor, and
Motorized Valve Positioner represent the models for which unique
calibration signals are required.
Second Analog Input (Remote Setpoint)
Connect precision DC milliampere source (0.01% accuracy) to rear
terminals labeled Second Analog Input, 4-20 mA+ and 4-20 mA-.
Display Parameter Description/Comments
StP1 0.00 mA step Apply 0.00 mA DC, press PAR.
StP2 5.00 mA step Apply 5.00 mA DC, press PAR.
StP3 10.00 mA step Apply 10.00 mA DC, press PAR.
StP4 15.00 mA step Apply 15.00 mA DC, press PAR.
StP5 20.00 mA step Apply 20.00 mA DC, press PAR.
Heater Current Monitor
Connect precision AC milliampere source (0.1% accuracy) to rear
terminals labeled Second Analog Input, CT+ And CT-.
Display Parameter Description/Comments
StP1 0.0 mA step Apply 0.0 mA AC 60 Hz, press PAR.
StP2 25.0 mA step Apply 25.0 mA AC 60 Hz, press PAR.
StP3 50.0 mA step Apply 50.0 mA AC 60 Hz, press PAR.
StP4 75.0 mA step Apply 75.0 mA AC 60 Hz, press PAR.
StP5 100.0 mA step Apply 100.0 mA AC 60 Hz, press PAR.
Motorized Valve Positioner
Construct a precision resistor
divider network consisting of four
250
W 0.1% tolerance resistors
connected in series as shown in
F i g u r e 4 5 , R e s i s t o r D i v i d e r .
Connect one end of the resistor
string to the rear terminal labeled
S l i d e w i r e F e e d b a c k I n p u t s ,
C o mm. a n d t h e o t h e r e n d t o
Excitation. The connection to the
W i p e r t e r mi n a l c o me s f r o m
different points of the resistor
string.
Display Parameter Description/Comments
StP1 0.0% step Connect wiper input to 0% point of divider
(Comm.), wait 10 seconds, press PAR.
StP2 25.0% step Connect wiper input to 25% point of divider,
wait 10 seconds, press PAR.
StP3 50.0% step Connect wiper input to 50% point of divider,
wait 10 seconds, press PAR.
StP4 75.0% step Connect wiper input to 75% point of divider,
wait 10 seconds, press PAR.
StP5 100.0% step Connect wiper input to 100% point of divider
(Excitation), wait 10 seconds press PAR.
86
Figure 45, Resistor Divider