Yokogawa µR20000 - Manual (Page 22)

3-9 SM 04P02B01-01E
Testing
3
Withstand Voltage
● Procedures
Perform the test with a withstanding voltage tester, and check whether the results
meet the criteria. Perform the measurement with the power switch turned ON.
Test Duration
The test duration is one minute.
Criteria
Tested Terminals Applied Voltage Max Allowable Condition
Leak Current
Between the power and 1.5 kVAC *1 5 mA Short the L and N terminals.
earth terminals
Between the input and 1.0 kVAC 1 mA Short all input terminals.
earth terminals
Between input terminals 1.0 kVAC 1 mA Short the odd and even
channels of the +/A, −/B,
and b
*2 terminals, and
measure between odd
and even channels.
Between the relay contact 1.5 kVAC 1 mA With the /A1, /A2, /A3, /A4,
output terminals and /A5, or /F1 option. Short all
earth terminals relay contact output terminals.
Between remote control 500 VDC 0.1 mA With the /R1 option.
input C terminal and
earth terminals
*1 With the /P1 option, the applied voltage is 1.0 kVAC.
*2 With the dot model without the /N2 option, exclude the b terminal. The b terminals are
connected to all channels.
Measurement Accuracy
● Overview
Tests the measuring accuracy of the recorder. 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 item).
* The pen model uses one A/D converter (A/D 1) for both channels 1 and 2, and another (A/
D 2) for both channels 3 and 4. Choose channel 1 or 2 to test A/D 1, and channel 3 or 4 to
test A/D 2.
The dot model uses a single A/D converter for channels 1 through 24. Choose any one of
channels 1 through 24 to test the A/D converter.
• The measuring accuracy of all channels is tested separately.
● Test Instruments
Instrument Specifications
DC voltage generator Accuracy: ±0.01% of setting or better
DMM Accuracy: ±0.01% of rdg or better
Variable resistors Accuracy: 0.01% + 2 mΩ or better
● Recorder Settings
Set the input range of the channels under test to the test range.
3.4 Test Procedures