sauermann TST Electronic Thermostat User Guide
- June 9, 2024
- sauermann
Table of Contents
sauermann TST Electronic Thermostat User Guide
Thermostats
TST thermostat has a measuring range for the ambient model from 0 to +50 °C. For the duct model it would be from -20 to +80 °C and for the terminal block model from -100 to +400 °C (depending on the connected Pt100 probe).
Symbols used
For your safety and in order to avoid any damage of the device, please follow the procedure described in this document and read carefully the notes preceded by the following symbol:
The following symbol will also be used in this document, please read carefully the information notes indicated after this symbol:
Connection of a Pt100 probe on terminal block:
- Switch
- Terminal block (only on model with terminal block)
- LCC-S software connection
- Alarm led
- Button for settings
- Relay terminal block
- Power supply terminal block
- Cable gland
Electrical connections as per NFC15-100 standard
This connection must be performed by a qualified and trained technician. To make the connection, the transmitter must not be energized.
NO: normally open
COM: common
NC: normally closed
NO COM NC 
Settings and use of the transmitter
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Configuration
CAUTION: to configure the transmitter, it must not be energized. Then, you can make the settings required, with the DIP switches (as shown on the drawing below). When the transmitter is configured, you can power it up.
To configure the transmitter, unscrew the 4 screws of the casing then open it.
The switches allowing the different settings are accessible. -
Units setting
To set a unit of measurement, put the on-off switch 4 of the units as shown beside.
-
Thresholds configuration
The button allows to activate or not an alarm (threshold), to set the action of the alarm (edge), to set the threshold(s) value, to set the time- delay and to acknowledge the alarm.
Working principle:
– By pressing the button more than 3 seconds, you can validate the setting and
go to the next setting.
– By pressing quickly the button, you can increment a value and scroll down
the different option or values.
-
Activate or deactivate an alarm
– Press the button for 3 seconds, “CONF” is displayed then “NEG” , meaning that the relay is in negative security, it is excited during an alarm condition.
– If needed, press quickly the button to switch the relay in positive security, the relay is de-energized during an alarm condition or a current breaking, “POS” is displayed.
– Press 3 seconds the button, “Buzz” screen is displayed with “ON” or “OFF” blinking. Briefly press on the button to activate (“ON”) or deactivate (“OFF”) (according to the last saved configuration) the buzzer during an alarm condition.
– Press the button for 3 seconds, “Alarm” screen is displayed with “On” or “Off” blinking (according to the last saved configuration).
– Press quickly the button, the display changes from “On” (activated alarm) to “Off” (deactivated alarm).
– Press the button for 3 seconds to confirm the setting. If the alarm is deactivated, the instrument displays the measurement; if the alarm is activated, the instrument displays the following setting. -
Set the action of the alarm (rising edge or falling edge)
The edge determines the action of the alarm according to the trespassing direction of the threshold(s).
Rising edge (1 threshold): the alarm goes off when the measurement exceeds the threshold and stops when it is below the threshold.
Falling edge (1 threshold): the alarm goes off when the measurement is below
the threshold and stops when it exceeds the threshold.
Monitoring (2 thresholds): the alarm goes off when the measurement is outside the defined low and high thresholds.
– Press briefly the button to select the trespassing direction then press the button more than 3 seconds to validate this direction and set the thresholds.
-
Set the threshold(s) value
The first digit blinks, it corresponds to the positive (0) or negative (-) setting of the threshold value. Press briefly the button to select the sign for the threshold value. Press the button more than 3 seconds to validate.
The second digit blinks, press briefly the button to scroll the numbers. Press the button more than 3 seconds to validate.
Repeat the process until the last digit to configure the threshold value, validate the threshold and go to the following setting.
If the monitoring edge has been selected, the transmitter displays the setting of the second threshold. -
Set the hysteresis
The hysteresis only concerns the rising edge and the falling edge modes.
In rising edge mode, the hysteresis allows to the transmitter to stay in alarm when the measurement is between the threshold and the threshold minus the hysteresis.
Example: for a 70°C threshold and a 10°C hysteresis, the instrument will stay in alarm when the measurement will be between 70 and 60°C.
In falling edge mode, the hysteresis allows to the transmitter to stay in alarm when the measurement is between the threshold and the threshold plus the hysteresis.
Example: for a 70°C threshold and a 10°C hysteresis, the instrument will stay in alarm when the measurement will be between 70 and 80°C.
The first digit blinks, set it by pressing the button briefly several times then press on the button more than 3 seconds to set the following digit.
Once the hysteresis is set, press the button more than 3 seconds to validate and set the time-delays. -
Set the time-delay 1 and the time-delay 2 (600 seconds maximum)
– In rising edge mode, the time-delay 1 corresponds to the time lag before the alarm goes off when the threshold has been reached. The time-delay 2 corresponds to the time lag before the alarm stops when the measurement is lower than the threshold minus the hysteresis.
Setting procedure: “Time 1” for the time-delay 1 is displayed then the time in second. The first digit blinks, press briefly on the button and scroll the figures. Press on the button more than 3 seconds to validate. Repeat the process until the last digit to set the time-delay 1 value (from 0 to 600 s) and validate. “Time 2” is displayed the time in second. Repeat the process to set the time-delay 2.
– In falling edge mode, the time-delay 1 corresponds to the time lag before the alarm goes off when the threshold has been reached. The time-delay 2, corresponds to the time lag before the alarm stops when the measurement is lower than the threshold plus the hysteresis.
The setting procedure is the same as the rising edge procedure.
– In monitoring mode, the alarm of the transmitter goes off when the measurement is below the lower threshold and higher the high threshold. The time-delay 1 corresponds to the time lag before the alarm goes off when the measurement is below the lower threshold and higher the high threshold. The time-delay 2 corresponds to the time lag before the alarm stops when the measurement is between the lower and higher thresholds.
The setting procedure is the same as the rising edge procedure.
The setting of time delays is done, the measurement is displayed.
Configuration via LCC-S software (optional)
The software allows to set the alarms, the thresholds, the relay action, the hysteresis and the time-delay of the device.
Active switch
-
To access the configuration via software:
– Set the DIP switches as shown beside.
– Connect the cable of the LCC-S to the connection of the transmitter. -
Please refer to the user manual of the LCC-S to make the configuration.
The configuration of the parameters can be done either with the DIP switch
or via software
(you can not combine both solutions). Switch off the sensor before settings
process.
Mounting
To mount the transmitter, mount the ABS plate on the wall (drilling: Ø 6 mm,
screws and pins are supplied).
Insert the transmitter on the fixing plate (see A on the drawing beside).
Rotate the housing in clockwise direction until you hear a “click” which
confirms that the transmitter is correctly installed.
Ambient model has not any fixing plate. 4 fixing holes are inside the back housing. Use them to install the transmitter on the required location.
Maintenance : please avoid any aggressive solvent. Please protect the transmitter and its probes from any cleaning product containing formalin, that may be used for cleaning rooms or ducts.
Precautions for use : please always use the device in accordance with its intended use and within parameters described in the technical features in order not to compromise the protection ensured by the device.
Accessories
Please refer to the data sheet to get more information about available accessories.
Download the LCC-S software user manual
Download the TST data sheet
https://sauermann-en.custhelp.com/