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Watlow Series 93 Overview ■ 1.1
Overview
General Description
Welcome to the Watlow Series 93, a 1/16 DIN microprocessor-based tempera-
ture controller. The 93 has a single input which accepts type J, K, T, N or S
thermocouple, RTD or process input.
With dual output, the primary output can be heating or cooling while the
secondary output can be a control output opposite the primary output (heat or
cool), alarm or none. Both outputs can be selected as either PID or on-off.
PID settings include proportional band, reset/integral, and rate/derivative.
Setting the proportional band to zero makes the Series 93 a simple on-off
controller with switching differential selectable under the [`HSC] parameter.
Special 93 features include the optional NEMA 4X rating, optional CE
compliance, dual four-digit displays in either red or green, optional low-voltage
power supply, autotuning for both heat and cool outputs, ramp to set point for
gradual warm-up of your thermal system, and automatic/manual capability
with bumpless transfer.
Operator-friendly features include automatic LED indicators to aid in
monitoring and setup, as well as a calibration offset at the front panel. The
Watlow Series 93 automatically stores all information in a non-volatile
memory.
Single Input -
Type J, K, T, N or S
Thermocouple,
RTD or Process
Output 1 -
Heat or Cool
Dual Control Output-
PID or on-off, User Selectable
Output 2 -
Heat, Cool, Alarm
or None
Overview of the Series 93
93
1
Figure 1.1 -
Series 93 Input and
Output Overview.