TEMPERATURE MONITORING
Safety Tests during operation
The Tester performs self-tests during normal operation. An internal earth
bond test and a low voltage test are performed prior to applying mains
power to any EUT (including Leakage tests). If the internal earth bond test
failed, the following message will be displayed:-
--------------------WARNING--------------------
INTERNAL RELAY FAULT.
CANNOT PROCEED.
If this message appears, the Kewtech KT77 is faulty and requires repair.
Contact your Kewtech Agent for repair.
If the low voltage test fails, then either of the following warnings will be
displayed:-
--------------------WARNING--------------------
APPLIANCE MAY BE SHORT CIRCUIT
PRESS THE ENTER BUTTON IF SAFE
PRESS THE RED BUTTON TO ABORT
--------------------WARNING--------------------
FUSE MAY BE OPEN CIRCUIT OR
PRESS THE ENTER BUTTON IF SAFE
PRESS THE RED BUTTON TO ABORT
These messages mean that the EUT is switched off or the fuse may be
open circuit, or it maybe possible that the EUT will draw more than 18A and
could damage the Tester. User discretion is required. If in doubt abort the
test and seek advice.
MULTIPLE EARTH CONNECTIONS
Temperature monitoring
The tester is provided with internal temperature monitors to ensure sensitive
components are not overheated. High rates of testing may cause this
situation, especially with long duration Earth Bond tests. Setting Earth
Bond test duration to 2 secs will increase operating time. If the following
message appears, leave the tester to cool down before pressing Enter to
continue testing.
WARNING
THE TEST HAS BEEN ABORTED BECAUSE THE APPLIANCE TESTER
BECAME TOO HOT. ALLOW THE UNIT TO COOL BEFORE STARTING
PRESS ENTER BUTTON TO CONTINUE
Multiple Earth connections:
In general, multiple earth connections to a EUT (e.g. water pipe connections
to a water heater) can cause difficulties in measurement. This has
previously needed the additional earth connections to be isolated.
The Kewtech KT77 tester is capable of testing earth connections in
the presence of additional earth paths. This is done automatically by
performing a point to point measurement of the earth connection, and
measurement of the differential leakage current, rather than the earth lead
current. Measurements are thus assured without special precautions.
Barcodes
Barcode Scanner Specification
The Kewtech KT77 Tester can be used with barcodes and barcode
scanners, readers or wands compatible with other Kewtech PAT testers
These connect to the serial (RS232) connector The required barcode reader
/ scanner configuration is as follows:-
Baud Rate: 9600
Start Bits: 2
Data Bits 8
Stop Bits: 2
Parity: None
Inter-character Delay: 20ms
TEMPERATURE MONITORING
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