Chapter 3 adjustments, 1 calibration of the measuring instrument’s input, Calibration of the measuring instrument’s input -1 – Yokogawa Data Acquisition with PID Control CX2000 User Manual
Page 21: Instruments for calibration, Overview, Ranges to be calibrated and their parameters
3-1
SM 04L31A01-01E
Adjustments
3
Chapter 3 Adjustments
3.1
Calibration of the Measuring Instrument’s Input
Allow the instrument to warm up for at least 30 minutes prior to calibration.
Instruments for Calibration
DC voltage generator
Accuracy: 0.005% of setting +1
µ
V
Resistor
100
Ω
, 300
Ω
(accuracy: 0.01% or less)
Overview
The structure of the A/D converter in the CX2000 differs depending on the model.
Multiple channels (groups) share one A/D converter. All A/D converters must be
calibrated, so calibration must be performed on each group.
CX1000
Monitor
No. of Inputs for
Measurement
Total Number
No. of
No. of
Group
Meas.
Interval
of Channels
CH/AD
A/D
6ch
1s
6
6
1
(1—6)
*
Group: a classification for all channels that share a single A/D converter
Control (1st Slot)
Number of Internal
Measurement
Total Number
No. of
No. of
Group
Control Loops
interval
of Channels
CH/AD
A/D
0 loops
—
0
0
0
—
2 loops
250 mS
5
5
1
(1—5)
CX2000
Control (1st Slot)
Number of Internal
Measurement
Total Number
No. of
No. of
Group*
Control Loops
interval
of Channels
CH/AD
A/D
0 loops
—
0
0
0
—
2 loops
250 mS
5
5
1
(1—5)
4 or 6 loops
250 mS
10
5
2
(1—5) (6—10)
* Group: a classification for all channels that share a single A/D converter
Monitor (2nd, 3rd Slot)
No. of Inputs for
Measurement
Total Number
No. of
No. of
Group
Meas.
Interval
of Channels
CH/AD
A/D
10 ch
1s
10
10
1
(1—10)
20 ch
1s
20
10
2
(1—10) (11—20)
Ranges to Be Calibrated and Their Parameters
Range
Zero
Full Scale
20 mV
0 mV
20 mV
60 mV
0 mV
60 mV
200 mV
0 mV
200 mV
1 V
0 V
1V
2 V
0 V
2 V
6 V
0 V
6V
20 V
0 V
20 V
Pt100
†
100
Ω
300
Ω
† You must calibrate the 200 mV range before calibrating the RTD range.