Watlow CAS - Manual (Page 61)

Setup
CAS User’s Guide 51
Input Units
The Input Units menu lets you choose a three-character description of
the channel's engineering units.
• Thermocouples can only be ºF or ºC.
• If you have selected a linear or pulse input type, you can choose any
available character for each character position. For example, you can
use GPM or PSI or % for a linear input's units.
The table below shows the character set for input units.
Input Reading Offset
This menu lets you set an input reading offset function to make up for
the input signal's inaccuracy at any given point. For example, at
temperatures below 400
°
F, a type J thermocouple may be inaccurate
("offset") by several degrees F. Use an independent thermocouple or
your own calibration equipment to find the offset for your equipment.
To correct for offset errors, change the factory default setting to a
positive or negative value for the channel you are editing. (A positive
value increases the reading and a negative value decreases it.)
Selectable values: -300 to 300 for thermocouples
NOTE
If the input type is set to Linear, Pulse, or Skip, you will not see this
menu.
Input Character Sets for Units
Thermocouple ºF or ºC
Linear & Pulse 0-9, A-Z, %, /,º, space
CHANNEL PROCESS UNITS
CHANNEL NAME ALARM STATUS
02 INPUT
UNITS ? °F
CHANNEL PROCESS UNITS
CHANNEL NAME ALARM STATUS
01 INPUT READING
OFFSET ? 0° F