EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
33
The supplied calibrated heat source (2100-810NG) operates from a 120-volt 60 Hz power
source. Minimum operating voltage is 105 volts. A frequency of 50 Hz won't work. The
supplied 16-gauge orange power cable provides the necessary safety ground. This cable is
50 feet (15 meters) long. If you need to add an extension cord to this cable, make sure it is
16 gauge or larger thickness of wire.
For a site that doesn’t have a 120-volt 60 Hz power source, the heat source should be
powered from a true sine wave inverter capable of 250 watts with an output of at least
110 volts at 60 Hz. The inverter should operate from an input voltage of 10.5 VDC to 15 VDC.
A 120-volt USA socket should be provided to match the heat source power cord. The inverter
should be grounded according to the manufacturer’s recommendations.
On the front of the calibrated heat source is a knob that lets you select one of five delta
temperatures, ranging from 126°F to 220°F. The heat source contains a heat block that can
reach a combined temperature of your delta temperature and the ambient temperature. It can
maintain this temperature for extended periods. The heat block is controlled by a circuit that
references both ambient temperature and the temperature of the heat block, and maintains the
selected differential. For example, if the ambient temperature were 85°F (29.4°C) and the
knob were set to 180°F (100°C), the heat block would be maintained at 265°F (129.4°C).
Infrared scanners respond to rapid changes in infrared radiation. The calibrated heat source
accomplishes the rapid changes by employing a rotating wheel with an aperture in one side.
As the wheel turns, the infrared radiation from the heat block is shielded from the scanner until
the aperture lines up with the opening in the bottom of the heat source case. The wheel
rotates at 300 rpm.
The calibrated heat source is placed over the opening of the scanner cover. With the heat
source in place, it is then possible to calibrate the system at a precise value above ambient
temperature.
STC recommends that you use the calibrated heat source (2100-810NG) only when the
outside (ambient) temperature is above 0°F (-18°C) and below 90°F (32°C).
If you must
use it at other times, do so only when the needle is centered on the front of the temperature
meter. If the needle isn't stabilized within
2 degrees of set point, the heat source isn't
operating properly.
The figure below shows an assembled calibrated heat source (2100-810NG).
Содержание SmartScanIS
Страница 1: ...EUD 2016026 00 Rev 2 SmartScanIS User s Guide for Union Pacific 14 January 2021...
Страница 82: ...82 14 January 2021 SmartScanIS User s Guide for Union Pacific EUD 2016026 00 Rev 2...
Страница 90: ...90 14 January 2021 SmartScanIS User s Guide for Union Pacific EUD 2016026 00 Rev 2...
Страница 130: ...130 14 January 2021 SmartScanIS User s Guide for Union Pacific EUD 2016026 00 Rev 2...
Страница 258: ...258 14 January 2021 SmartScanIS User s Guide for Union Pacific EUD 2016026 00 Rev 2...
Страница 376: ...376 14 January 2021 SmartScanIS User s Guide for Union Pacific EUD 2016026 00 Rev 2...
Страница 380: ...380 14 January 2021 SmartScanIS User s Guide for Union Pacific EUD 2016026 00 Rev 2...