Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 13)

2-4 SM 04L31A01-01E
Measurement Accuracy Test (Measurement Input and Control Input)
Check that the specifications below are met given the following operating conditions: 23
± 2 ° C, 55 ± 10% RH, and a warm up time of 30 minutes.
Range Input Value Criterion Specifications
20 mV +20.00 mV ± 3 digits ± (0.1% of rdg + 2 digits)
0.00 mV ± 2 digits
–20.00 mV ± 3 digits
60 mV +60.00 mV ± 6 digits ± (0.1% of rdg + 2 digits)
0.00 mV ± 2 digits
–60.00 mV ± 6 digits
200 mV +200.0 mV ± 3 digits ± (0.1% of rdg + 2 digits)
0.0 mV ± 1 digits
–200.0 mV ± 3 digits
2 V +2.000 V ± 3 digits ± (0.1% of rdg + 2 digits)
0.000 V ± 1 digits
–2.000 V ± 3 digits
6 V +6.000 V ± 6 digits ± (0.1% of rdg + 2 digits)
0.000 V ± 1 digits
–6.000 V ± 6 digits
20 V +20.00 V ± 3 digits ± (0.1% of rdg + 2 digits)
0.00 V ± 1 digits
–20.00 V ± 3 digits
50 V +30.00 V ± 5 digits ± (0.1% of rdg + 3 digits)
0.00 V ± 2 digits
–30.00 V ± 5 digits
Pt100 18.52 Ω /–200 ° C ± 0.4 ° C ± (0.15% of rdg + 0.3 ° C)
100.00 Ω /0 ° C ± 0.2 ° C
313.71 Ω /600 ° C ± 0.9 ° C
Error between Channels Test
Connect the (+), (–), and (b) terminals on all measurement and control input channels
using thick leads, then check whether the following criteria are met.
Range Input Value Criterion
20 mV Short (+) (–) 0.00 mV ± 2 digits
Pt100 103.9 Ω Measured value: 10 ° C ± 0.2 ° C,difference between channels:
0.2 ° C or less
Note
• If the measurement error does not meet the criterion (10 ° C ± 0.2 ° C), and unless you
determine the cause to be the effect of the resistance in the test facility's RTD wiring, use
the following measurement criteria.
Measured value: 10 ° C ± 0.5 ° C
Difference between channels: 0.2 ° C or less
• See your nearest Yokogawa representative for the error between channels in the control
input section.
Excessive Input Test
1. Connect the plus (+) and minus (–) sides of all measurement and control input
channels.
2. Set all channels to the 20 mV range.
3. Apply 10 V between the plus and minus sides for 1 minute, and confirm that
there is no malfunction.
4. Set all channels to the Pt100 range.
5. Apply ± 10 V between (A) and (B) for 1 minute, and confirm that there is no
malfunction.
2.2 Test Procedures