Quality inspection standards – Yokogawa EXA ISC202 2-wire Conductivity Transmitter/Analyzer User Manual
Page 103
IM 12D06A03-01E
Appendix 3-11
13-3. ISC202G, ISC202S 2-Wire Inductive Conductivity Transmitter (Fieldbus Communication)
Quality
Inspection
Standards
ISC202G, ISC202S
2-Wire Inductive Conductivity Transmitter
(Fieldbus Communication)
QIS 12D06A03-61E
1st Edition: Apr. 2007
1. Scope
This inspection standard applies to the ISC202G and ISC202S 2-Wire Inductive Conductivity
Transmitters (Fieldbus specification).
2. Inspection
Items
2.1 Insulation resistance test
* 2.2 Dielectric strength test
2.3 Temperature indication check
* 2.4 Conductivity indication check
* 2.5 Fieldbus communication functional check
Note: Items marked with an asterisk (*) may only be confirmed by a test certificate.
3.
Inspection Methods, Standards and Conditions
x
Connect the testing circuit as shown in Figure 1. Allow the instrument to warm up for at least
5 minutes before conducting the tests. For the connections for the insulation resistance test,
follow the instructions in Sections 3.1and for the connections for the dielectric strength test,
follow the instructions in Section 3.2.
x
Use test equipment shown in Figure 1, or equivalent, for the tests.
3.1 Insulation Resistance Test
x
Apply 500 V DC between the power supply terminals (+ and –) plus input terminals (11 to
17), shorted together, and the earth terminal (G). The insulation resistance must be 100 MΩ
or greater.
3.2 Dielectric Strength Test (Required Only for ISC202S)
Apply 600 V AC, an AC voltage of substantially sinusoidal waveform with a frequency of 50 Hz
or 60 Hz, between the terminals shown below, for at least 2 seconds. The insulation must
withstand this voltage. (The sensed current should be 10 mA.)
x
Between the power supply terminals (+ and –) plus input terminals (11 to 17), shorted
together, and the earth terminal (G)
3.3 Temperature
Indication
Check
Connect the instruments as shown in Figure 1, and set them as follows.
Decade resistance box 1: 1097.3 :
Decade resistance box 2: 100 Ω
Set the type of temperature sensor to PT1000.
Setting Service Code 10 to 1.
a. Press the [ ] key.
b. Press the [NO] key twice. The message display will show “ SERV.”
c. Press the [YES] key. The data display will show “00” with the first digit of 0 flashing.
d. Press the [
] key once. The data display will show “10.”
e. Press the [ENT] key. The message display will show “ T.SENS.”
f. Press
the
[
] key once. The data display will change from “0” to “1.”
g. Press the [ENT] key until the message display shows “ SERV.”
h. Press the [ ] key. The instrument returns to the measurement mode.