Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 14)

2-5
SM 04L31A01-01E
Testing
2
Burnout Test
1. Connect a 2 k Ω resistor between the plus (+) and minus (–) sides of an arbitrary
channel.
2. Connect 56 k
Ω
resistor and a 0.1
µ
F capacitor in parallel between the plus (+)
and minus (–) sides of an arbitrary channel other than the one in step 1.
3. Set the range for the 2 connected channels to TC - TYPE K, and the Burnout to
ON.
4. Check that the channel to which 2 k Ω was connected displays a temperature
close to the room temperature.
5. Check that the channel to which the 56 k
Ω
resistor and the 0.1
µ
F capacitor
were connected in parallel displays Burnout (overrange).
6. Set Burnout to OFF.
7. Check that both channels in steps 1 and 2 do not display Overrange.
Reference Junction Compensation Accuracy Test
Perform 0
°
C measurement for TYPE - T on all control and measurement channels, and
confirm that the result is below the following reference value.
Reference value: 0
±
0.5
°
C
CAUTION
• Use a calibrated non-insulated thermocouple without a terminal tip, having a Φ 0.5 mm or
narrower strand. Also, be sure to take the level of calibration error into consideration
during testing.
• Continuously monitor the thermostatic chamber, and check that the temperature remains
at 0 ° C ± 0.01 ° C.
• When using a 0 ° C thermostatic chamber (for example the ZC-114 by Coper Electronics
Co. Ltd.) raise the tip of the thermocouple up 10 mm from the bottom.
• Conduct all tests in a stable environment.
• Install a windbreak if necessary.
• Allow a 15 minute warm up after wiring the thermocouple.
• Always use the terminal covers.
Display Function
Check the adjustment of the display color and backlight intensity using the following
procedure.
1. Press the MENU key twice to enter Set mode. The Set mode screen is
displayed.
2. Press the Display soft key.
3. Select Color.
4. The default color and color name is displayed for each channel; compare the
colors and their names to make sure there are no discrepancies.
2.2 Test Procedures