Yokogawa Removable Chassis DX1000N - Manual (Page 25)

4-2
SM 04L41B01-01E
4.2 Adjusting the A/D Converters
● Overview
The number of included A/D converters differs depending on the instrument model.
For all of the A/D converters, input a predetermined value for each range and take
measurements, then save the calibration values.
● Instruments Used
Instrument Specifications
DC voltage generator Accuracy: ±0.005% of setting + 1 µV or better
Variable resistors Accuracy: 0.01% + 2 mΩ or better
● Calibration
Calibrated Channels
Model
A/D No. 1 A/D No. 2 A/D No. 3 A/D No. 4
Zero Full Zero Full Zero Full Zero Full
DX1002/DX1002N CH1 CH2 - - - - - -
DX1004/DX1004N CH1 CH2 CH3 CH4 - - - -
DX1006/DX1006N CH1 CH2 - - - - - -
DX1012/DX1012N CH1 CH2 - - - - - -
DX2004 CH1 CH2 CH3 CH4 - - - -
DX2008 CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
DX2010 CH1 CH2 - - - - - -
DX2020 CH1 CH2 CH11 CH12 - - - -
DX2030 CH1 CH2 CH11 CH12 CH21 CH22 - -
DX2040 CH1 CH2 CH11 CH12 CH21 CH22 CH31 CH32
DX2048 CH1 CH2 CH13 CH14 CH25 CH26 CH37 CH38
Input Value
Input Type Range Zero Full Remarks
DC voltage
20 mV 0 mV 20 mV
60 mV 0 mV 60 mV
200 mV 0 mV 200 mV
1 V 0 mV 1 V
2 V 0 mV 2 V
6 V 0 mV 6 V
20 V 0 mV 20 V
50 V No adjustment needed
RTD
Pt100 0 Ω 300 Ω
Cu10 0 Ω 200 Ω With the /N1 or /N3 option.
Connection
UUA
When DC range
DC Voltage
generator
Channel 1 (CH1)
H
L
UUA
When RTD or CU range
–
Channel 1 (CH1) b
DC Voltage
generator
Variable
resistors
Channel 2 (CH2)
H
L
Channel 2 (CH2)
+
– +
B A
b B A
(Zero value) (Full value) (Full value)
UUA: Unit Under Adjustment
Short these
three wires.
(Zero value)