Valhalla Scientific 4314KV, Руководство по эксплуатации

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7
Chapter 5 – Features and Operations
General
This section of the manual contains complete operating instructions for the Model 4314KV/KVS Digital
Igniter Testers. A description of the front panel controls, connection instructions, and the theory behind
4-wire resistance measurement is discussed in this section.
Front Panel
ON/OFF Button
When the front panel power switch is placed in the OFF/CHARGE position, all power is removed from the
output terminals, and the battery pack is connected to the charging circuit. When the switch is placed in
the ON position, the battery pack is disconnected from the charging circuit. The possibility of a common
mode voltage between the device under test and AC Power ground is therefore eliminated.
Range Selection Knob
The 4314KV/KVS measurement ranges are selected by turning the range knob to the desired position.
Move knob clockwise to increase the range and counterclockwise to reduce the range. Range knob is also
used to place the tester in Stand By mode.
Fuse Holder
The fuse holder is mounted on the front panel and contains a 2 amp in-line fuse. This fuse is designed to
protect the battery pack from excessive charging currents. For continued protection, replace the line fuse
only with fuse of the same voltage and current rating and type. DO NOT use repaired fuses or short-
circuited fuse holders.
Charging Jack
The battery charging jack is a barrel type and is located on the 4314KV/KVS front panel. The center pin of
the connector is positive. The charging requirements of the internal battery pack are 6VDC @ 1.25A. The
correct charging voltage is supplied by the adapter included with the instrument. Additional adapters are
available as Option "A2". Charger is equipped with a locking ring, and is sealed IP68.
Fail Safe Button (model 4314KVS only)
When pressed, the Fail-Safe test button simulates a worst case component failure and displays the “real”
fail-safe current. During the test, the current source is isolated from the binding-post. The ohms
measurement window will display FSt, to indicate that the unit is in fail-safe test mode.
Figure
1 - Fail-Safe test button detail (KVS)