YOKOGAWA YS1000 Series, User Manual

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5-1
IM 01B08D02-02EN
Maintenance
5
WARNING
For products with optional code /FM or /CSA:
(1) Devices must be maintained by professionally trained personnel or ask
YOKOGAWA's sales office or sales representative.
(2) In case of option code /FM, install devices according to NEC (National
Electrical Code: ANSI/NFPA-70).
In case of option code /CSA, all wiring shall comply with Canadian Electrical
Code Part I and local electrical codes.
CAUTION
If the instrument’s front panel becomes soiled or dusty, wipe it gently using a dry,
soft cloth. Do not use organic solvents, chemicals, or chemically treated dust cloths.
Doing so may result in the instrument case becoming deformed or discolored.
5.1 Inspecting Indication Accuracy
As a guideline, indication accuracy should be inspected on an annual basis.
5.1.1 Calibration Instruments
Name Description
Number of
Units
DC voltage standard Yokogawa 7651 or equivalent 1
Digital multimeter Yokogawa 7561 or equivalent 1
5.1.2 Inspecting Input Indication Accuracy
Follow the procedure below to specifically check input indication accuracy.
(1) Apply a voltage of 1.0 V DC to the analog input terminals using the voltage standard.
(2) On the Input and Output Data Display of the Tuning Display, check that the analog
input signal concerned is equivalent to 0 ±0.1% in the engineering unit.
(3) Similarly, apply a voltage of 5.0 V DC to check that the analog input signal concerned
is equivalent to 100 ±0.1% in the engineering unit.
Parameter Name Display Range
Display Transition and
Display Title
X1
Analog input 1 −25.0 to 125.0
Tuning Display >
[ I/O DATA ]
(Input and Output Data
Display)
X2
Analog input 2 −25.0 to 125.0
Chapter 5 Maintenance