Electrical Test Instruments PI-6000
Section II - Detailed Description
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Copyright(C) 1994-2019 Electrical Test Instruments, LLC All Rights Reserved
Page II-12
Main Power READY switch: This green switch turns on the main power to the
output section of the test set, and its green lamp lights when ON.
Main Power INTERLOCK switch: This red switch turns off the main power to the
test set. It lights if an interlock condition is detected.
Output ON indicator: This yellow lamp lights when output voltage is ON.
Output Voltage binding posts: These binding posts are connected to output
stabs 1 and 4 and may be used to monitor voltage on the breaker with a DMM.
Thermal Status - Bus: This multicolor bar graph indicates approximate
temperature of the output bus. Green bars indicate normal temperature. Yellow
bars indicate significant heating, and heavy testing should be postponed until
unit cools. Red bars indicate overheating, and unit must cool to yellow range
before testing. Output initiation will be inhibited if second red bar lights.
Excessive temperature may indicate poor output connections.
Thermal Status - System: This indicates temperature of the output section, and
other conditions, as determined by the POD. A thermistor in the winding of the
first section of the output transformer provides actual temperature, but the
POD also calculates a “virtual”
temperature based on overload duty cycle limits
as indicated in the specifications. The ten bar graph LEDs correspond to
temperatures of approximately 80 to 280 degrees F, with about 20 degrees per
bar. Testing is allowed up to a reading of two red bars but will then be inhibited
until temperature cools to no more than four yellow bars.
Coarse Tap Switch: This rocker switch selects the coarse tap. The unit powers up
in tap 1. Pressing the switch briefly UP or DOWN will raise or lower the tap by
one. Holding it will change taps about one per second.
Coarse Tap Indicator: This seven-segment red LED indicates tap position from 1
to 9.
Rheostat Indicator Bar Graph: This ten-segment red LED indicates approximate
rheostat position. 0 or 1 segment lit indicates minimum position, and 9 or 10
segments lit indicates maximum position.
Rheostat Adjust Switch: This rocker switch adjusts the rheostat position.
Pressing it briefly UP or DOWN causes the rheostat to move by a very small
increment, for fine control. Holding it for about a second will cause the rheostat
to move very quickly, for rapid rough adjustment.
