Adjustment; Adjustment Of Measured Values - Omega RD2800 Series User Manual

18. ADJUSTMENT

■ 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
(1) Measured values adjustment
(2) Shift programming of
measured value
(3) Adjustment of printing position
(4) Adjustment for time-axis
synchronization of pens
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.)
2
Preparation
1) Preparation of tools
Tools
DC standard
voltage/current generator
Reference junction
compensator
Thermocouple for test
Standard variable resistor
3-core copper wire
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.)
Adjustments
Remarks
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.
18.1 Adjustment of Measured Values
Adjustment to keep the measured value against input within
the accuracy ratings.
Programming to shift a measured value
Adjustment to set the printing range to the zero and span lines
on the chart
Adjustment of the gaps between pens for the time-axis
synchronization
Input types
DC voltage Thermocouple
○ ○
○
○
－１０４－
Details
Reference conditions
Items
Ambient temperature 23 ±2°C
Ambient humidity
Power voltage
Power supply
frequency
Resistance
thermometer
Accuracy: Should be better than ±0.05%.
0°C ±0.2°C or less
Same type of thermocouple as input type
Accuracy: Should be better than ±0.05%.
○
○
Same resistance for each 3 cores
Reference
Sec.18.1
Sec.18.2
Sec.18.3
Sec.18.4
Reference conditions
55 ±10%RH
100 ±1VAC
50 or 60 ±0.5Hz
Remarks