5-9
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Handling Precautions
(If [
C0
1
: PV range type] is not RTD or if [
C88
: Special function] is other than
“5”, [
C89
: Zener barrier adjustment] is not displayed.)
(4) Press the [enter] key to display a difference in wiring resistance between the A
and B lines on the lower display.
(5) Press the [enter] key to store the difference in wiring resistance between the A
and B lines into this unit as an adjustment value.
(6) Turn OFF the power to the unit and connect the RTD correctly.
Handling Precautions
• The Zener barrier can be used only when the PV range type is 41 to 52 or
63 to 68.
• Use a Zener barrier whose resistance is low enough so that the total
resistance, including wiring resistance, is 85 or less.
• Adjust the Zener barrier with a resistance difference between the Zener
barrier and long extension wiring of 20 or less. If this resistance
difference is 20 or more, the Zener barrier cannot be adjusted and the
adjustment value becomes 0.00.
• Once the Zener barrier has been adjusted, the correction is performed
with the same adjustment value even though the PV range type is
changed to other RTD.
• To return the adjusted value to 0.00, connect PV input terminals 10 and
11, leaving terminal 12 open, and follow the above steps (2) to (5).
• Notes for products with S/N 133220_ _ _
•
Be sure to adjust the unit with wiring No. 1. If the unit is adjusted with
wiring No. 3, poor accuracy may result.
•
Use zener barriers recommended by Azbil Corporation.
If the unit is used with unrecommended zener barriers, accuracy may be
drastically impaired. Before using such zener barriers, contact the azbil
Group.
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