Planned Preventive Maintenance and Calibration Handling SOP for Blake Devices

Find below the planned preventive maintenance statement and the recommended SOP for handling Blake devices during calibration.

Planned preventive maintenance statement

Under normal operating conditions, the Blake temperature and humidity monitoring device does not require any scheduled planned preventive maintenance (PPM). The only planned periodic activity required is calibration, which should be performed according to your organization’s quality procedures and applicable regulatory requirements.

If a device or sensor shows abnormal readings, physical damage, or another fault, please contact the Bolt IoT Support team instead of opening or servicing the device.

Calibration handling SOP

Before sending the device for calibration

1. Switch off the device and disconnect its power supply before packing it.

2. Keep the sensor connected to the device. Do not disconnect the sensor before dispatch.

3. Do not open the enclosure, unscrew the sensor, loosen any component, or disassemble any part of the device.

4. Record the Bolt Device ID and the calibration points required for the device.

5. Inform the calibration laboratory that the complete assembled device must be calibrated without disconnecting the sensor.

6. Ensure that no pressure is applied directly to the sensor connector or cable inside the packaging.

During calibration

1. The sensor must remain connected throughout the calibration process.

2. The device enclosure and sensor assembly must not be opened, unscrewed, or disassembled.

3. The sensor connector must not be pulled, twisted, forcibly inserted, or removed.

4. The sensor must never be connected or disconnected while the device is powered on.

5. The connector is keyed and must not be forced in the wrong orientation. Doing so can damage or short the sensor pins.

6. If the laboratory believes that the sensor must be disconnected or encounters any difficulty with the device, it should stop the process and contact the Bolt IoT Support team before proceeding.

7. The device should be handled carefully and protected from mechanical stress throughout calibration and transportation.

After receiving the calibrated device

1. Inspect the device, sensor cable, connector, enclosure, and packaging for visible damage before powering it on.

2. Confirm that the sensor is still securely connected.

3. If the sensor appears loose or disconnected, do not push it back into the connector and do not power on the device. Contact the Bolt IoT Support team.

4. If the assembly is intact, power on the device and verify that its readings are being displayed and collected normally.

5. Retain the calibration certificate and verify that it contains the relevant device identification, calibration points, results, and calibration date.

6. If an offset needs to be updated based on the calibration certificate, your authorized team can use the Bolt Calibration Manager. Please contact us if guidance is required. Inform Bolt IoT Support immediately if readings are unavailable or appear abnormal after calibration. These precautions are intended to protect the sensor and connector and prevent damage during calibration or transit.