Watlow CLS Manual de usuario Pagina 43

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Installation
CLS Users Guide 35
4 and 8 CLS Scaling Values
For RTD1 inputs, RA and RB are a matched pair (RP). Their match-
ing tolerance is 0.02% (2 ppm/
º
C) and their absolute tolerance is
0.1% (10 ppm/
º
C). RC has 0.05% tolerance.
For RTD2 inputs, use 0.05% tolerance resistors.
For linear mVdc, Vdc, and mAdc ranges, use 0.1% tolerance resis-
tors. Higher tolerances may cause significant errors. Correct any
errors due to resistor tolerance with the CLS's built-in linear scaling.
You can also install other components (like capacitors) for signal
conditioning; please consult Watlow Anafaze for more information.
NOTE
When adding your own scaling resisters to the 4 and 8 CLS,
the shorting pads of the RC must be cut before installing to
the bottom of the PC board.
A COM
A -
RC
IN -
IN +
A +
RD
RB
To
CLS
Circuitry
Analog
Input
Terminal
Internal
RA
+5 Vdc
Reference
C .47 uF
C .47 uF
(RTD/Thermister)
( Voltage/Current)
RC
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