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3-6
SM MV1000-01E
Measurement Accuracy
● Overview
The measurement accuracy is tested using two different* integral times.
* But only one integral time is used when using the MV2000 with the /MC1 option.
The measurement accuracy test is performed in one of the following ways.
• One representative channel for each A/D converter is tested, and the channel-to-
channel error between the representative channel and other channels is tested (see
next page).
* Choose any channel number for each A/D from those listed in the A/D converter
configuration table.
Ex.: With the MV1004, set channels 1 and 3 as representative channels.
• The measuring accuracy of all channels is tested separately.
● A/D Converter Configuration
Models
Measurement
Interval
Number of
Channels
No. of
A/Ds
Channel Number by A/D
MV1004
125 ms
4CH
2
1-2, 3-4
MV1006
1 s
6CH
1
1-6
MV1008
125 ms
8CH
4
1-2, 3-4, 5-6, 7-8
MV1012
1 s
12CH
1
1-12
MV1024
1 s
24CH
2
1-12, 13-24
MV2008
125 ms
8CH
4
1-2, 3-4, 5-6, 7-8
MV2010
1 s
10CH
1
1-10
MV2020
1 s
20CH
2
1-10, 11-20
MV2030
1 s
30CH
3
1-10, 11-20, 21-30
MV2040
1 s
40CH
4
1-10, 11-20, 21-30, 31-40
MV2048
1 s
48CH
4
1-12, 13-24, 25-36, 37-48
● Test Instruments
Instrument
Specifications
DC voltage generator
Accuracy: ±0.005% of s 1 µV
DMM
Accuracy: ±0.005% of rdg + 1 µV
Variable resistors
Accuracy: 0.01% + 2 mΩ or better
● Setup
Set the input range of the channels under test, and the test range.
● Test Procedures
Warm up the instrument for thirty minutes before performing the test.
Enter the input value determined for each range. Check whether the displayed
measured values satisfy the reference values.
DC voltage generator
To the input
terminals
+
−
Variable resistors
The resistance of three
lead wires must be equal.
Input terminal block
3.4 Test Procedures