Electronic Temperature Monitor
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QualiTROL Electronic Temperature Monitor
QualiTROL Electronic Temperature MonitorQualiTROL Electronic Temperature Monitor
QualiTROL Electronic Temperature Monitor
The 111-300 has a weatherproof enclosure, which can contain either one or two
Model 111L/111W Electronic Temperature Monitor (ETM) units. The basic
unit contains a Model 111W which can monitor winding current and then
calculate the winding temperature. The 111W has four setpoint contacts which
operate from the winding temperature. If an independent monitor for oil
temperature is desired, a Model 111L can be included in the 111-300. The 111L
monitors temperature and provides an additional four setpoint contacts operating
from the oil temperature. In a retrofit situation the ETM universal sensors
replace the mechanical thermometer sensors. See Figure 1 for enclosure details.
Figure 1. Enclosure Dimensions
Both units use an RTD (Pt100) temperature sensor in a thermal well to monitor
oil temperature. If both units are supplied, a dual RTD sensor can be supplied so
that only a single thermal well is required. A clip-on CT is used to measure the
current. It monitors a standard CT loop such as a 0-5A or 0-10A. The 111L and
111W both provide the following standard features:
• Displays the present temperature as well as the maximum temperature
stored.
• Operates two SPDT relays to control Cooling fans. Each relay has its own
setpoints. An icon on the display Indicates that the Fans are ON. (Icon #1
and #2)
• A Manual Fan Control provides the capability to force the Fans to turn ON.
An icon on the display indicates that the unit is in Manual Fan mode.
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