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Differential Temperatures
This section of the
High Priority LTC Alarm Setup
window
includes the fields described
below.
Temperature
setpoint
Allows you to enter a temperature value to actuate the alarm relay if the
differential measurement equals or exceeds the value.
Hysteresis
Allows you to select a switching differential of the temperature that is
required to de-actuate the alarm relay. If the temperature exceeds the
setpoint, the alarm relay actuates. For the alarm relay to de-actuate, the
temperature must fall below the setpoint minus the hysteresis.
The reason for entering a hysteresis value is to prevent the relay from
“chattering” (toggling on and off rapidly) when the signal exceeds the
setpoint value.
Example:
If the
Temperature Setpoint
field is set to 10° C and the
Hysteresis
field is set to 3° C, the relay will actuate when the difference
in temperature reaches 10° C, but will de-actuate at 7° C (10 - 3 = 7).
Actuate alarm
(Yes / No)
Enables (Yes) / Disables (No) the actuation of the alarm relay when the
differential temperature measurement exceeds the threshold limit.
Controlling
difference
calculations
[Setup]
, which allows you to configure
the difference calculations.
Cancel and Load Buttons
This section of the
High Priority LTC Alarm Setup
window
includes the fields described
below.
Cancel Button
Erases any changes you have made to this window, returns all variables
to the previous values, and returns to the
LTC Monitor Setup
window.
Load Button
Enters all variables displayed in the window into the system and returns
to the
LTC Monitor Setup
window.
Low Priority LTC Alarm Setup
The
Low Priority LTC Alarm Setup
window opens when you click [Setup] from the
. This window is very similar to
the
High Priority LTC Alarm Setup
window
. Select all values in the same manner as you
would for the High Priority Alarm Relay.
Summary of Contents for 509ITM Series
Page 26: ...26 www qualitrolcorp com Current Input Wiring...
Page 55: ...55 www qualitrolcorp com 3 Continue with the setup procedure...
Page 101: ...101 www qualitrolcorp com...
Page 144: ...144 www qualitrolcorp com The following window will appear...
Page 167: ...167 www qualitrolcorp com The Customer Setup window displays 4 Click Load Tap Changer...
Page 178: ...178 www qualitrolcorp com Appendix...
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