Omega RD200 - Manual (Page 108)

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18. ADJUSTMENT 18.1 Adjustment of Measured Values
■ Adjustment
Adjustment comprises four kinds shown below. (1), (3) and (4) have already been adjusted. However, it is
recommended for maintaining the measuring and printing accuracy to adjust them once a year.
Calibration Details Reference
(1) Measured values adjustment
Adjustment to keep the measured value against input within
the accuracy ratings.
Sec.18.1
(2) Shift programming of
measured value
Programming to shift a measured value Sec.18.2
(3) Adjustment of printing position
Adjustment to set the printing range to the zero and span lines
on the chart
Sec.18.3
(4) Adjustment for time-axis
synchronization of pens
Adjustment of the gaps between pens for the time-axis
synchronization
Sec.18.4
1
Adjustment of measured values
It is recommended for maintaining measuring and
printing accuracy to adjust them once a year.
(1) Execute the adjustment for each channel.
(2) Execute the adjustment under the reference
condition. (See the right table.)
Items Reference conditions
Ambient temperature 23
±2°C
Ambient humidity 55
±10%RH
Power voltage 100
±1VAC
Power supply
frequency
50 or 60
±0.5Hz
2
Preparation
1) Preparation of tools
Input types
Tools
DC voltage Thermocouple
Resistance
thermometer
Remarks
DC standard
voltage/current generator
○ ○ Accuracy: Should be better than
±0.05%.
Reference junction
compensator
○ 0
°C ±0.2°C or less
Thermocouple for test ○ Same type of thermocouple as input type
Standard variable resistor ○ Accuracy: Should be better than
±0.05%.
3-core copper wire ○ Same resistance for each 3 cores
2) Connection
Connections depend upon the input types. See the next page.
3) Before starting adjustment
(1) After the connection, mount the terminal board cover and turn on the power supply.
(2) Before starting adjustments, warm up your recorder for at least 30 minutes until it becomes stable. (It is
recommended to warm it up for at least one hour if possible.)
Check and adjustments of the measured values need meticulous work in addition to the standard tools and
reference conditions.
If you need checks or adjustments of the measured values, please consult your nearest CHINO’s agent.
Reference conditions
Adjustments Remarks