Handing precautions – Honeywell DCP552 Mark II User Manual
Page 134
7-35
●
C99 (PV1 zener barrier adjustment)
●
C100 (PV2 zener barrier adjustment)
The adjustment described below must be performed when a zener barrier is
used.
(1) Turn off the
DCP552
. When installation and wiring is completed, short-
circuit A and B on the resistance temperature detector.
(2) Turn on the
DCP552
and set setup data
C98
to 241.
(3) Display setup data
C99
and
C100
.
(4) Press the
ENTER key
to display the difference in resistance (A-B) between
zener barriers connected to wire A and wire B.
(5) Press the
ENTER key
to store the difference in resistance values (A-B) in
the
DCP552
.
(6) Press the
DISP key
to return to the normal display mode.
(7) urn off the
DCP552
and disconnect the wire between A and B.
Handing Precautions
• Adjust the resistance in the zener barriers connected to wire A and B to
20Ω or less. Adjustment is not possible if the resistance is higher than
20Ω.
• This adjustment is not required for inputs other than resistance
temperature detectors or when zener barriers are not to be used.
• When a zener barrier has been adjusted, compensation is performed for
this zener barrier. When resistance temperature detector inputs not
employing zener barriers are to be used, perform the above adjustment
without the zener barriers.
54 55 56
RTD
57 58 59
A
B
C
RTD
Short-
circuit
Short-
circuit
A
B
C
¥ PV1 zener barrier adjustment
¥ PV2 zener barrier adjustment
Zener
barrier
Zener
barrier
Zener
barrier
Zener
barrier
Zener
barrier
Zener
barrier
Chapter 7. PARAMETER SETUP