The ETP thermostat is an allround ON/OFF thermostat for industrial use.

4 temperature ranges from –50 to +375ºC
Change-over between cooling and heating functions
Several thermostats may be controlled by 1 sensor
DC outputs, 0-10V and 0-20/4-20mA
Safeguarded in case of sensor failure
May be applied as a value converter

Product Range

Temperature scales, set at installation:
4 temperature scales are supplied to be attached to the control knob.
Scale 1: -50/+75ºC
Scale 2: +50/+175ºC
Scale 3: +150/+275ºC
Scale 4: +250/+375ºC

FUNCTION
The ETP-97 thermostat is equipped with 6 switches and a programming table, which facilitates the choice between the following functions and settings:

1. The relay action may be set to call for either "heating" or "cooling".

2. There are 4 temperature ranges from -50ºC to +375ºC selectable with an interval of 125ºC.

3. Adjustment for "master-slave function", i.e. the master thermostat sensor controls one or several slave thermostats. The system allows an application as a neutral-zone thermostat, a 2- to 3-step thermostat, with several alarm levels etc.

Controls
The set control serves to set the desired temperature. With a coin inserted into its slot the scale may be adjusted in accordance with a reference thermometer. Thus, a high accuracy throughout the entire scale is ensured. The DIFF control enables the temperature differential to be adjusted from 1 to +15ºC. The SCALE ADJ control allows compensation for sensor tolerances and conductor resistance. Red light-emitting diode indicates when the relay has been connected. In case of an error in the sensor circuit, the output relay will always fall out.

Interconnections:
An analogue instrument, type ETPD, may be connected to display the sensor temperature. Voltage outputs 0-10V DC and current outputs 0-20mA or 4-20mA may be utilized for remote control and data transfer to PLC systems etc. These outputs also allow the application of the ETP-97 thermostat as a value amplifier (temperature transducer) within a larger system. The setpoint may be controlled externally via External Potentiometer, type ETPP.

Technical data