4838 Reactor Controller
5
General Specifi cations
Electrical Ratings
115VAC, 15.0 Amps, 50/60 Hz
230VAC, 15.0 Amps, 50/60 Hz
Before connecting a controller to an electrical outlet,
the user must be certain that the electrical outlet has
an earth ground connection and that the line, load
and other characteristics of the installation do not
exceed the following limits:
Voltage: Fluctuations in the line voltage should not
exceed 10% of the rated nominal voltage shown on
the data plate.
Frequency: Controllers can be operated from either
a 50 or 60 Hertz power supply without affecting their
operation or calibration.
Current: The total current drawn should not exceed
the rating shown on the data plate on the controller
by more than 10 percent.
Thermocouple: Unless otherwise specifi ed, all 4838
Controllers operate with a Type-J (Iron-Constantan)
thermocouple. The total resistance of the thermo-
couple and the lead wires should not exceed 100
ohms. If the resistance of the thermocouple circuit
is higher, it will not function properly.
Environmental Conditions
This instrument is intended to be used indoors.
Operating: 15 ºC to 35 ºC; maximum relative humid-
ity of 80% non-condensing. Installation Category II
(over voltage) in accordance with IEC 664.
Pollution degree 2 in accordance with IEC 664.
Altitude Limit: 2,000 meters.
Storage: -25 ºC and 65 ºC; 10% to 85% relative hu-
midity.
4838 Reactor Controller Specifi cations
General Specifi cations
Input Thermocouple type
Type-J
Operating Range
0-800 °C
Readout and Setpoint
Resolution
1 °C
System Accuracy
+/- 2 °C
Control action
three-term PID plus limit
control
Control output 1
115VAC or 230VAC
Operating voltages
115VAC or 230VAC
Heater Loop
Proportional Band:
12 °C
Integral time:
375 seconds
Derivative:
93 °C/second
Cycle time:
20 seconds
