Test Certificate - YOKOGAWA SC202G (S) User Manual

12.1 TEST CERTIFICATE

Test
Certificate
1. Introduction
This inspection procedure applies to the model SC202 Conductivity transmitter. There is a serial
number, unique to the instrument, which is stored in non-volatile memory. Each time the transmitter is
powered up, the serial number is shown in the display. An example is shown below, for details see the
Users manual:
025
F70.00
2. General Inspection
Final testing begins with a visual inspection of the unit to ensure that all the relevant parts are present
and correctly fitted.
3. Safety Test
The (-) minus and the external ground terminal of the housing are connected to a Voltage generator
(100 VDC). The measured impedance value should be over 9.5 MΩ.
Terminal 14 and the external ground terminal of the housing are connected to a Voltage generator (500
VAC RMS) for 1 minute. The leakage current should remain below 12 mA.
4.1 Accuracy Testing
Our automated testing facility checks the resistivity input accuracy of the instrument using a calibrated
variable resistor (decade resistor box).
4.2 Accuracy Testing of all supported temperature elements
Our automated testing facility checks the input accuracy of the instrument using a calibrated variable
resistor (decade resistor box) to simulate the resistance of all temperature elements.
EXA Series
Model SC202
Inductive Conductivity Transmitter
Unique Number
Line Number
ATE (automatic test equipment no.)
Month code
Year code
12-1 Test Certificate
IM 12D7B3-E-E