Yokogawa EXA ISC202 2-wire Conductivity Transmitter/Analyzer - Manual (Page 93)

IM 12D06A03-01E
Appendix 3-1
13. APPENDIX 3 QUALITY INSPECTION
13-1. ISC202G 2-Wire Inductive Conductivity Transmitter
Quality
Inspection
Standards
ISC202G 2-Wire Inductive Conductivity
Transmitter
QIS 12D06A03-01E
1st Edition: Sep. 2004
3rd Edition: Mar. 2007
1. Scope
This inspection standard applies to the ISC202G 2-Wire Inductive Conductivity Transmitter.
2. Inspection Items
2.1 Insulation resistance test
2.2 Current output test
2.3 Temperature indication check
* 2.4 Resistance (conductivity) indication 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 3.1.
x
Use a testing circuit and test equipment shown in Figure 1, or equivalent, for the tests.
x Performance tests should be done in the inspection mode where the tests from Section 3.2
through Section 3.4 take place in sequence and cannot be retraced. If the reconfirmation of
a test is needed, turn off the power to the transmitter, turn on the power again, and enter the
inspection mode to restart the tests.
3.1 Insulation Resistance Test
（ 1） Apply 500 V DC between the power supply terminals shorted together (+ and –), input
terminals shorted together (11 to 17) and the earth terminal (G). The insulation resistance
must be 100 MΩ or greater.
3.2 Current Output Test
<Preparation>
x
Set resistance box 1 to 30 k:. Wind ten turns of wire onto the ISC40 sensor and set
resistance box 2 to 1 k:.
<Test>
x
Through key operations on the transmitter, enter Service Code 87, input password 070, and
press the [ENT] key.
x When “
HIF” appears, press the [YES] key.
x Press the [ENT] key. (The date in day-month-year (last 2 digits) order will appear.)
x
Press the [ENT] key. (The time in hour-minute-second order will appear.)
x Press the [ENT] key.
x
When the message display shows “4 mA,” the output current must be within in the range
shown in Table 1.
x
Press the [ENT] key repeatedly until the message displays shows “12 mA.” When it shows
“12 mA,” the output current must be within the range shown in Table 1.
To skip the current output not needed to be checked, just press the [ENT] key.
x Press the [ENT] key repeatedly until the message displays shows “20 mA.” When it shows
“20 mA,” the output current must be within the range shown in Table 1.
x From the above last step, proceed directly to the temperature indication check in Item 3.3.