Watlow Series 146 Retrofit - Manual (Page 3)

Integral – the set point in integral (on board) to the controller.
JIS – Joint Industrial Standards, a set of technical, scientific and dimensional standards developed in Japan. RTD sensors
with the JIS curve change resistance at a rate of 0.00396 ohms/ohms/C.
Line Voltage – the voltage required powering the electronics of the controller.
Low Limit - device will deactivate output on a temperature drop below set point.
On/Off – a method of control that turns the output full on until set point is reached and then off until the process error
exceeds the hysteresis.
Open Brd – the form factor of this controller is an open circuit board mounted on four standoffs.
Manual Reset – the limit must be reset on a power cycle and requires manual reset on limit trip.
Multi RSP – multiple remote set potentiometers were supported. Each allowed the set point to be selected and adjusted.
Relay – refers to an electromechanical relay.
Remote – set point is adjusted using a remote potentiometer.
Panel – the form factor of this controller is mounted through a hole cut in the panel.
PI – Proportional and Integral, a control mode with two functions: proportional action dampens the systems response,
and integral corrects for droop.
PID – Proportional, Integral, and Derivative, a control mode with three functions: proportional action dampens the
systems response, integral corrects for droop, and derivative prevents overshoot and undershoot.
Potted – the circuit board and electronics are encased in epoxy.
Proc – Process input may accept 0-5, 1-5, 0-10 volts or 0-20 and 4-20 mA.
Profiling – Controller will perform a sequence of programmed steps.
Programmable – The feature is changeable in the field through jumpers and/or parameter selection.
RTD – Resistance Temperature Detector, a sensor that is 100 ohms at 0 degrees C and made of platinum material.
SSR – Solid State Relay, these devices will switch AC voltage only and require a load to latch on.
Sw DC – Switched DC, a time proportioning DC output used to drive DC input solid state relays.
t/c – Thermocouple sensor device made by joining two dissimilar metals whose standards is identified by a letter.
Temp Range – the range over which the controller could have the set point adjustment.
Thermistor – a sensor that changes resistance as the temperature changes. Similar but not the same as an RTD.
Universal – Input can be a thermocouple, 100 ohm DIN RTD or process (volts or milliamperes)
VAC – Volts Alternating Current
VAC/DC- Volts Alternating Current or Direct Current
VDC – Volts Direct Current