Yokogawa µR20000 - Manual (Page 33)

4-2
SM 04P01B01-01E
4.2 Adjustments to the Pen Model
Adjusting the A/D Converters
● Overview
Enter the value determined for each range, perform measurement, then write the
adjusted values to the AD converter.
● Instruments Used
Instrument Specifications
DC voltage generator Accuracy: ±0.005% of setting + 1 µV or better
Resistors 10 Ω, 50 Ω, 100 Ω, 150 Ω, 300 Ω, Accuracy: 0.01% or better
● Channel
Adjustment of channels 1 and 2 is performed using channel 1, and adjustment of
channels 3 and 4 is performed using channel 3.
● Procedure
Connection
UUA
When DC range
DC Voltage
standard DECADE
RESISTANCE
BOX
Channel 1 or
Channel 3
H
L
UUA
UUA: Unit Under Adjustment
When RTD or Cu range
− +
Channel 1 or
Channel 3
b B A
Input Value
Input Type Range Zero Full Description
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 100 Ω 300 Ω -
Cu10 10 Ω 50 Ω With the /N1 option.
Pt50 50 Ω 150 Ω With the /N3 option.