Yokogawa EXA SC202 2-Wire Conductivity Transmitter/Analyzer - Manual (Page 98)

IM 12D08B02-01E
3-10 Appendix
2/3
QIS 12D08B02-61E
In this state, change the resistance value of the decade resistance box 1 as shown in Table 1.
The corresponding temperature indication must be within the range.
Table 1 Temperature Indication Check
Reference
Temperature
Resistance of
Resistance Box 1
Indication Range
–10 °C 960.9 : –10 ±0.3 °C
75 °C 1289.8 : 75 ±0.3 °C
190 °C 1721.6 Ω 190 ±0.3 °C
240 °C 1904.6 Ω 240 ±0.3 °C
3.4 Conductivity Indication Check
Connect the instruments as shown in Figure 1, and set them as follows.
Decade resistance box 1: 100 Ω
Decade resistance box 2: 10 Ω
In this state, change the resistance value of the decade resistance box 2 as shown in Table 2.
The corresponding conductivity indication must be within the range.
Table 2 Conductivity Indication Check (Cell Constant : 0.1/cm)
Reference
Conductivity
Resistance of
Resistance Box 2
Indication Range
10 mS/cm 10 Ω 10 ±0.05 mS/cm
1 mS/cm 100 : 1 ±0.005 mS/cm
100 μS/cm 1 k: 100 ±0.5 μS/cm
10 μS/cm 10 k: 10 ±0.05 μS/cm
1 μS/cm 100 k: 1 ±0.005 μS/cm
3.5 Fieldbus Communication Functional Check
Check for normal function using Fieldbus equipment specified by Yokogawa.