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Programming Function Blocks and Features
Video Recorder – User Manual 89
Custom algorithm prompts
Table 4-7 describes the custom algorithm prompts. See Table 4-2 for additional prompts. These
prompts appear only if CUSTOM INPUT is enabled under FEATURES. See Section 0.
Table 4-7 Custom Algorithm Prompts
Prompt Range/Selections Definition
INPUT SIGNAL EMF, TC, or RTD. Selects the input hardware.
RJ ENABLE Select YES for reference junction
compensation, NO for no
compensation.
Reference junction
compensation.
EMISSIVITY ENABLE Select YES for emissivity
compensation for emf input.
Emissivity compensation for
emf input.
Xn
Yn
You must input at least 2 coordinates.
X must increase by at least 0.00001.
Y values are not limited except in the
following 2 cases.
1. If the incoming signal is from a
thermocouple and reference junction
compensation is on, make sure that
a, b, and c are all true.
a) All Y's are increasing or all are
decreasing.
b) Y range includes 0-65°C.
c) Temperature units are °F, °C, K,
or °R.
2. If Online adjustment of the value is
desired, make sure that all Y's are
increasing or all are decreasing.
Use these prompts to plot a
curve of up to 20 points, where
X
n
is the incoming signal in
the electrical units selected
and Y
n
is its corresponding
value in the temperature units
selected. Interpolation is
straight-line.
ELECTRICAL UNITS MV, OHMS, VOLTS Units of the electrical signal.
LAG
≥ 0 seconds or OFF
LAG is a time constant applied
to the input measurement
value. This provides digital
filtering (LAG) to the
measurement.
Lag appears on menu only if
EXPANDED INPUT is enabled
under Enable Features in the
Program menu.
SAMPLE HOLD OFF, discrete parameter, 0, 1 Holds Input. The input value is
measured normally when this
discrete is OFF(0) and holds
its last value when the discrete
is ON(1).
Hold appears on menu only if
EXPANDED INPUT is enabled
under Enable Features in the
Program menu.
Press Menu when entries are complete. At the prompt "PRESS ENTER TO SAVE", press Enter to save
your changes, or press Menu again to exit the session without saving the changes.