Yokogawa µR20000 - Manual (Page 24)

3-11 SM 04P02B01-01E
Testing
3
Channel-to-Channel Error
● Procedures
Pen Model
Assign inputs as shown in the table below in parallel to channels 1 and 2, and check
whether the measured values on both channels meets the criteria. Perform the same
test using channels 3 and 4.
Criteria
Range Input Criteria
20 mV Short +/A and −/B 0.00 ±0.01 mV
Pt100 103.9 Ω 10 ±0.2°C, between channel dispersion within 0.2°C
Dot Model
Assign inputs as shown in the above table in parallel to all channels, and check
whether the measured values on each channel meet the test criteria in the table
above.
* The b terminal of the resistance temperature detector input is connected internally.
However, when option /N2 is specified, the b terminal is isolated at each channel.
Burnout Detection
● Procedures
The test is performed on a representative channel * from each A/D converter. Set up
the burnout detection function on the recorder in advance.
* On a four-pen model for example, perform the test on channel 1 and channel 3. On a dot
model, check an arbitrary channel.
Check the action in the following cases.
• Connect 2 kΩ between the channel’s +/A terminal and −/B terminal. Set that
channel’s thermocouple type to K and check that a value close to room
temperature is displayed.
• Connect 82 kΩ and 0.1 µF in parallel between the channel’s +/A terminal and −/B
terminals. Set that channel’s thermocouple type to K and check that the displayed
value is “B. out.”
3.4 Test Procedures