4-20
Chapter 4 Maintenance and Troubleshooting of this Device
4-5 Insulation Resistance Test and Withstand Voltage Test
(i) Cautions regarding the insulation resistance test and withstand voltage test
As a rule, do not perform the insulation resistance test and withstand voltage test. These tests may
damage the built-in lightning arrester for surge current absorption. If these tests absolutely must be
carried out, following the specified procedure closely.
(ii) Test procedure
(1) Detach the device's exterior wiring
(2) Short the respective + and - SUPPLY terminals.
(3) Perform the tests in between each of these shorted circuits and the ground terminals.
(4) Applied voltage and decision criteria are as follows. In order to prevent damage to the
pressuretransmitter, do not apply voltages higher than the values shown below.
(iii) Decision criteria
Test Decision Criteria
Insulation resistance test
2×10
7
Ω or higher at test voltage 25 V DC
(25 °C, 60% RH or higher)
Withstand voltage test
50 V AC, 1 min., set current at 2 mA
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