3. Power ON/OFF - Pressing and releasing this button turns the
DIT 400 on - holding down for longer than 2 seconds turns the
unit off (plus Auto Power Off is incorporated).
4. This button selects Insulation Testing Mode (your DIT 400
defaults to Insulation Test 500V DC on Power On).
5. This allows selection of insulation test voltage
250V DC for SELV and PELV circuits
500V DC (default) for circuits up to and including 500V with the
exception of the above systems
1000V DC for circuits above 500V
(SELV = Separated Extra-Low Voltage. PELV = Protective Extra-Low Voltage).
6. Selects Continuity Test Mode.
7. CERT/SFS Mode (Certification/Super Fast System) - This is the
heart of your Socket & See DIT 400 tester. (On switch on your
DIT 400 defaults to Certification mode. In CERT (Certification)
mode the DIT 400 will record results (with accuracy FULLY
COMPLIANT with BSEN 61557). To allow completion of
certificates requiring recording and logging of absolute values for
insulation or continuity testing.
In SFS (Super Fast System) mode the DIT 400 uses NEW
Patented Technology to deliver a super fast result. It does this by
going straight to the critical measurement point of 2MΩ as
recommended in codes of practice.
Insulation test less than 1.99MΩ gives a bad result (FAIL) and
greater than 2.0MΩ good (PASS).
SFS Continuity Test is less than 2Ω good (PASS) higher than 2Ω
bad (FAIL)
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