Yokogawa µR20000 - Manual (Page 24)

3-11 SM 04P01B01-01E
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 channels 1 through 6, and
check whether the measured values on all channels meets the test criteria.
* 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