T Series Precision Temperature - Self Install Guide

Table of Contents

Use the below links to navigate to the section you need:

• Introduction

• What's In The Box

• Before You Start

• Installation Steps

• Adding the Sensor to 'Live'

• Common Issues

• Resetting the Sensor

• Battery Replacement
• Support
  
  

---

Introduction

                           

 

 

Thank you for purchasing a precision temperature monitoring device. This manual explains how to install and setup the product.

Before the installation and use of the product, carefully read the supplied instructions.

The “T Series” temperature device provide precision temperature readings in real time accurate to 0.3°C, with varying lengths of interchangeable probes available.

---

Specifications

	Measurement Range	Accuracy	Notes
Temperature	-196°C to +300°C	Class A	±0.15°C or better over 50°C. Accuracy can be certified down to -90°C if required
Maximum number of probes	2	-
Probe Type	PT100 4 Wire
Operating Range	-20°C - +60°C

Calibration

All temperature probes are adjusted at 0 °C at the time of manufacture.

Invisible Systems can provide calibration services for this device, including:

• Single-point calibration
• Three-point calibration

Calibration can be supplied as either:

• UKAS traceable calibration, or

• UKAS certified calibration,

  depending on customer and regulatory requirements.

Calibration should be carried out at intervals defined by your internal procedures, risk assessments, or applicable standards.

The responsibility for defining calibration intervals remains with the user.

---

Limitations & Responsibility

• This guide provides instructions for installing Invisible Systems equipment only.
• It does not replace site-specific risk assessments or safe working procedures.
• Invisible Systems accepts no responsibility for installation work carried out by third parties outside the scope of this guide.
• Use of the Invisible Systems platform is subject to the applicable customer agreement and platform terms.
• Damage resulting from incorrect installation or use outside the scope of this guide may not be covered under warranty.

---

Safety

---

What's in the Box

Item	Quantity
T Series Temperature Device	1
Specified Probe	1

Options

Available probe configurations and cable lengths.

Item	Code
0.5m Temperature Probe	SPT-1
2m Temperature Probe	SPT-3
3m Temperature Probe	SPT-5
4m Temperature Probe	SPT-2
Dual Probe 4m Temperature Probe	XPT-2
Gasket

---

Before You Start

Prerequisites

Before installing this device, ensure the following:

• You have an active account and login access to the Invisible Systems Live platform
• The monitoring location has been checked and agreed
• The installation location provides suitable signal coverage
• The device asset ID / label has been recorded or is visible
• You have safe access to the installation location
• The environment is within the normal operating conditions for the product

---

Tools Required

• Screwdriver or bit
• Mounting Pad - Double Sided
• Mounting Screws (optional)

       

---

Installation Steps

Record the Device ID

• Note the 16-digit Device ID from the sticker on the rear of the device.

  The ID will begin with 70B

                                                         

Remove the Rear Cover

• Using a suitable screwdriver, remove the four screws from the rear of the sensor.

                                  

 

Activate the Battery

• Press the reset as indicated below.
• You should see a single green LED flash.
• Wait for 10-15 seconds, you should see a double green led flash. This indicates that the sensor has connected with the gateway.

                                                   

Confirm Device Start-Up

• 1 green flash - device powered on

• 2 further green flashes - device successfully connected to the gateway,

  If the additional green flashes are not observed, refer to the Common Issues section.

   

Re-fit the Cover

• Replace the cover and secure it using the four security screws.

Apply the Mounting Pad

• Apply mounting pad to the rear of the device

Mount the Device

• Secure the device in the pre-selected location, ensuring it is firmly fixed

Probe Installation

The temperature probe may be used to monitor temperatures in a range of environments, including fridges, freezers, cold rooms, or general storage areas. The probe should be positioned in a representative location within the area requiring monitoring.

Select a location that reflects the normal operating conditions of the space and is suitable for the intended monitoring purpose.

For fridge or freezer installations, there are several suitable methods:

• Where available, route the probe cable through the rear access port of the appliance.

                                       

• If no access port is present, the cable may be routed through the door seal, ensuring that the seal remains intact and the door closes properly.

If installing in a fridge, the transmitter may be placed inside the appliance if required. However, lower ambient temperatures may reduce the battery lifespan, and this should be considered when selecting the installation location.

Securing the Probe

                                   

To ensure accurate and consistent readings, the probe must be securely positioned and prevented from moving.

• Fix the probe in place using an appropriate clip, bracket, or cable tie
• Ensure the probe is not in direct contact with cooling elements, evaporator plates, or airflow vents unless specifically required
• Avoid leaving the probe loose inside the appliance, as movement may result in fluctuating readings

Where monitoring air temperature, position the probe in a representative location within the storage area, away from doors and direct airflow.

---

Adding the Sensor to the 'Live' Platform

• Log in in to the Invisible Systems Live Platform
• Navigate to Sensor Setup
• Select Add New Sensor
• Enter the 16-digit Device ID recorded earlier

For full platform instructions, refer to the Live Platform User Guide.

Verify Data Is Being Received

• In the Live platform, navigate to Sensor Diagnostics
• Confirm the sensor status is online
• Verify that data readings are being received
• If data is not visible, refer to the Common Issues section

Installation and commissioning are complete once data is visible in the Live platform.

---

Common Issues

Issue	Likely Cause	Action
No LED flashes after battery activation	Battery not seated or pull tab not fully removed	Recheck battery position and ensure the pull tab has been fully removed. Press the reset button.
Only one green LED flash observed	Device powered but not yet connected	Wait 60 seconds, then press the reset button. If still unresolved, check the gateway is online and move the sensor closer.
No data visible in Live platform	Device has not sent a data packet	Wait up to 10 minutes, then refresh the page. If the sensor shows online but no data is received, contact Invisible Systems Support.
Sensor shows offline in diagnostics	Battery issue or gateway connection	Press the reset button and refresh the page. If still offline, check the gateway is online and reposition the sensor closer, if 24 hours have passed contact Invisible Systems Support.
Incorrect readings displayed after 24 hours	Unsuitable mounting location	Relocate the sensor. If readings remain incorrect, contact Invisible Systems Support.

---

Resetting the Sensor

Remove the Rear Cover

• Using a suitable screwdriver, remove the four screws from the rear of the sensor.

                         

Activate the Battery

• Press the reset as indicated below.
• You should see a single green LED flash.
• Wait for 10-15 seconds, you should see a double green led flash. This indicates that the sensor has connected with the gateway.

Confirm Device Start-Up

• 1 green flash = device powered on
• 2 further green flashes = device connected successfully to the gateway
  If the additional green flashes 

---

Battery Replacement

Remove the Rear Cover

Remove the four security screws and carefully lift off the cover.

Remove the Battery

The battery is secured by metal retaining prongs inserted into the PCB terminals and a double-sided adhesive pad beneath the battery.

To remove the battery:

• Grip the battery firmly on both sides

• Apply even pressure, gently rocking the battery side-to-side

• Gradually pull the battery away from the PCB until the retaining prongs disengage and the adhesive releases

                                                   

Insert the New Battery

Insert the new battery into the PCB terminals, ensuring the correct polarity is observed.

Press the battery firmly into place until it is fully seated.

Confirm Device Start-Up

Observe the LED indicator to confirm the device powers on.

Re-fit the Front Cover

Replace the front cover and secure it using the two security screws.

 

---

Support

For the fastest resolution, please use the Support options below.

1. Visit www.invisible-systems.com
2. Select Support from the main menu
3. Access the Help Centre or Raise a Support Ticket

When raising a support ticket, please provide:

• Device ID
• Site name
• Description of the issue