Apogee Instruments µCache AT-100 Owner's Manual

Certificate of Compliance

EU Declaration of Conformity

This declaration of conformity is issued under the sole responsibility of the manufacturer:

Apogee Instruments, Inc.
721 W 1800 N
Logan, Utah 84321
USA

For the following product(s):

Models: µCache
Type: Bluetooth® Memory Module
Bluetooth SIG Declaration ID: D048051

The object of the declarations described above is in conformity with the relevant Union harmonization legislation:

• 2014/30/EU: Electromagnetic Compatibility (EMC) Directive
• 2011/65/EU: Restriction of Hazardous Substances (RoHS 2) Directive
• 2015/863/EU: Amending Annex II to Directive 2011/65/EU (RoHS 3)

Standards referenced during compliance assessment:

• EN 61326-1:2013: Electrical equipment for measurement, control and laboratory use – EMC requirements
• EN 50581:2012: Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances

Apogee Instruments, Inc. states that, based on information from raw material suppliers, their products do not contain intentional additives of restricted materials including lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, DEHP, BBP, DBP, and DIBP. Articles with >0.1% lead concentration are RoHS 3 compliant using exemption 6c. Apogee Instruments does not perform its own analysis on raw materials or end products for these substances.

Signed for and on behalf of: Apogee Instruments, February 2021

Bruce Bugbee
President
Apogee Instruments, Inc.

Introduction

The µCache AT-100 facilitates precision environmental measurements using Apogee's analog sensors. Measurements are transmitted wirelessly to a mobile device via Bluetooth®. The Apogee Connect mobile app interfaces with the µCache to collect, display, and export data.

The µCache features an M8 connector for connecting to an analog sensor. For a list of supported sensors, visit: Apogee Instruments MicroCache Bluetooth Memory Module.

The µCache app supports manual and automatic data logging, as well as live data measurements when connected to a mobile device. The app allows users to record, download, and export samples.

Data logging is configured via sampling and logging intervals. A Bluetooth® connection to the mobile app is required for setup and data collection, but the µCache stores measurements independently. It has a large memory capacity of approximately 400,000 entries, or about 9 months of data at a 1-minute logging interval.

The µCache is powered by a 2/3 AA battery. Battery life is influenced by daily connection time over Bluetooth® and the sampling interval.

The µCache housing includes a button and LED for managing Bluetooth® connectivity and providing status feedback.

Sensor Models

This manual covers the Apogee µCache (model number AT-100).

The sensor model number and serial number are located on the back of the µCache unit. For manufacturing date information, contact Apogee Instruments with the serial number.

Specifications

* Battery Life is primarily impacted by sampling interval and amount of time connected to a mobile app.

Quick Start Guide

Quick Start Guide

1. Download Apogee Connect from the App store or Google Play store.
2. Open the app and tap the “+” icon.
3. Press the green button on the µCache unit and hold for 3 seconds.
4. When the µCache is recognized in the app, click on its name (e.g., "uc###").
5. Select the sensor model you are connecting.
6. Calibration: If directed to enter a custom calibration number, refer to the calibration sheet that came with the sensor. If the calibration number is already filled in, do not change it.
7. Click "Add".
8. Your sensor is now added and reading in real-time.

Further Instructions

Bluetooth® Connection

1. Open the Apogee Connect mobile app. To add a µCache for the first time, tap the + icon in the upper corner.
2. A 1-second button press on the µCache makes it discoverable by the app for 30 seconds. The µCache light will start blinking blue, and the device name will appear on screen. Tap the device name (e.g., "microCache 1087") to connect.
3. Select your sensor model and specify custom calibration factors if necessary. You can also rename the µCache. Tap ENTER.
4. Your µCache will now appear on the app's main display with live readings. Tap the µCache to view graphical output and set up logging.
5. Subsequent connections can be made with a 1-second button press; the µCache will automatically connect.

Important Note: If logging is enabled, the µCache does not automatically turn off when the sensor is disconnected. To turn off the µCache, disable logging through the app while connected, or perform a 10-second button press. Three white flashes indicate logging is disabled and the µCache is off.

LED Status Indication

A 1-second button press provides status indication:

• ⚪ (white): Not Connected, Not Data Logging, Good Battery
• ? (blue): Connected
• ? (green): Data Logging Active
• ? (red): Low Battery / Critically Low Battery

A 10-second button press turns logging on and off:

• ???: Data Logging On
• ???: Data Logging Off

A 1-second button press also indicates connection status:

• ???...: Discoverable (Blinks every two seconds for up to 30 seconds)
• ???: Connected (Three quick blinks when a connection is established)

Logging Instructions

Begin Logging

1. Click the “Settings” ⚙️ icon.
2. Scroll down and toggle on the “Logging Enabled” button.
3. Set the Logging interval (determines data point frequency).
4. Set the Sampling interval (determines how many readings are averaged for each data point). Note: Shorter intervals reduce battery life. Faster sampling has the most effect. For example, 15-minute logging with 5-minute sampling is adequate for most greenhouse applications and provides about a year of battery life. One-second sampling can shorten battery life to about one week.
5. Click the green Save button.
6. Scroll down and hit Match Current Time.

Collect Logs

1. If disconnected, reconnect the µCache by pressing the green button for 3 seconds.
2. Click the “Collect Logs” icon.
3. Select “Append to existing” to add to a dataset on your phone, or “Create New” to start a new dataset.
4. Confirm Start and End dates match the desired data range.
5. Click “Collect Logs”.
6. Once collected, graphs will populate on the dashboard. Data sets can also be exported via email.

Live Data Averaging

Used in live meter mode to smooth out fluctuations in the sensor signal. Particularly useful for sensors like Quantum Light Pollution sensors (SQ-640 series) or others detecting subtle trends.

Dark Threshold

The amount of light accepted before a photoperiod is considered disrupted. Useful for measuring photoperiods, especially with light-sensitive plants.

Included in the µCache packages: All AT-100 units include a µCache unit, a battery, and a complimentary sensor base.

Instructional Videos: View videos on using the Apogee Connect App at: Apogee MicroCache Support Videos.

Cable Connectors

The ruggedized M8 connectors are rated IP68, constructed from corrosion-resistant marine-grade stainless-steel, and designed for extended use in harsh environmental conditions.

Instructions

• Pins and Wiring Colors: Apogee connectors have six pins, though not all are used for every sensor. Unused wire colors inside the cable are removed at the logger end to simplify connection. Contact Apogee for replacement cables to ensure proper pigtail configuration.
• Alignment: Arrows on the connector jacket and an aligning notch ensure proper orientation when reconnecting the sensor. A reference notch inside the connector also aids alignment before tightening.
• Disconnection for extended periods: When disconnecting a sensor for an extended time, protect the µCache's connector half from water and dirt using electrical tape or another method.
• For Calibration: When sending sensors for calibration, send only the short end of the cable and half the connector.
• Tightening: Connectors are designed to be firmly finger-tightened only. Over-compression can occur if a wrench is used due to the O-ring. Pay attention to thread alignment to avoid cross-threading. When fully tightened, 1-2 threads may still be visible.
• WARNING: Do not tighten the connector by twisting the black cable or sensor head; only twist the metal connector.

Deployment and Installation

Apogee µCache Bluetooth® Memory Modules (model AT-100) are designed to work with Apogee analog sensors and the Apogee Connect mobile app for spot-check measurements and logging. For accurate incoming radiation measurements, the sensor must be level. Each sensor model comes with a different mounting option for achieving a horizontal plane.

The AL-100 leveling plate is recommended for most sensors. For mounting to a cross arm, the AM-110 mounting bracket is recommended for use with the AL-100.

The AM-320 Saltwater Submersible Sensor Wand accessory features a mounting fixture at the end of a 40-inch segmented fiberglass wand, making it suitable for saltwater use. The wand allows sensor placement in hard-to-reach areas like aquariums. While sensors are fully-potted and submersible, the µCache itself should not be submerged and must be kept in a safe, dry place.

Please Note: Do not let the µCache dangle.

Maintenance and Recalibration

µCache Maintenance

• Ensure the latest version of software is installed for the mobile app and the latest firmware is installed on the µCache. Check the app store for your OS to confirm the latest Apogee Connect version. Firmware version can be checked in the app's Settings page.
• Keep the µCache unit clean and free of debris.
• If the housing is opened, ensure the gasket and seating are clean and the interior remains dry. Tighten screws until firm to create a weather-tight seal.

Steps to Replace the µCache Battery

1. Use a Philips screwdriver to remove the screws from the battery cover.
2. Remove the battery cover.
3. Remove the used battery.
4. Place a fresh battery, aligning the positive terminal with the + label on the board.
5. Ensure the gasket and seating are clean.
6. Replace the battery cover.
7. Use a Philips screwdriver to replace the screws.

Sensor Maintenance and Recalibration

Moisture or debris on the diffuser is a common cause of low readings. The sensor's domed diffuser and housing offer improved self-cleaning from rainfall, but dust or salt deposits can accumulate and block the optical path. Dust or organic deposits are best removed with water or window cleaner and a soft cloth or cotton swab. Salt deposits should be dissolved with vinegar and removed with a soft cloth or cotton swab. Never use an abrasive material or cleaner on the diffuser.

Apogee sensors are stable, but nominal accuracy drift is normal for all research-grade sensors. For maximum accuracy, recalibration is recommended every two years, though longer intervals may be acceptable based on specific tolerances.

Refer to individual sensor product manuals for more sensor-specific maintenance and recalibration information.

Troubleshooting and Customer Support

Cable Length

When connected to a measurement device with high input impedance, sensor output signals are not affected by shortening or splicing cables. Tests show negligible calibration effect even with up to 100 m of cable. Apogee sensors use shielded, twisted-pair cable to minimize electromagnetic interference. For best measurements, the shield wire must be connected to an earth ground, especially in electromagnetically noisy environments or with long lead lengths.

Modifying Cable Length

See the Apogee webpage for details on extending sensor cable length: How to Make a Weatherproof Cable Splice.

FAQs

For more troubleshooting support, see the Apogee FAQ webpage: Apogee MicroCache FAQ.

Return and Warranty Policy

Return Policy

Apogee Instruments accepts returns within 30 days of purchase for products in new condition (as determined by Apogee). Returns are subject to a 10% restocking fee.

Warranty Policy

What is Covered

All products manufactured by Apogee Instruments are warranted to be free from defects in materials and craftsmanship for four (4) years from the date of shipment. Items must be evaluated by Apogee for warranty coverage. Products not manufactured by Apogee (e.g., spectroradiometers, chlorophyll content meters, EE08-SS probes) are covered for one (1) year.

What is Not Covered

The customer is responsible for all costs associated with the removal, reinstallation, and shipping of suspected warranty items. The warranty does not cover equipment damaged due to:

1. Improper installation or abuse.
2. Operation outside of specified operating range.
3. Natural occurrences (e.g., lightning, fire).
4. Unauthorized modification.
5. Improper or unauthorized repair.

Nominal accuracy drift over time is normal and considered part of proper maintenance; routine recalibration is not covered under warranty.

Who is Covered

This warranty covers the original purchaser of the product or any subsequent owner during the warranty period.

What Apogee Will Do

Apogee Instruments will, at no charge:

1. Repair or replace the item under warranty (at Apogee's discretion).
2. Ship the item back to the customer via Apogee's chosen carrier. Expedited shipping methods are at the customer's expense.

How To Return An Item

1. Obtain a Return Merchandise Authorization (RMA) number from Apogee's technical support department by submitting an online RMA form at Apogee RMA Form or by calling (435) 245-8012 or emailing techsupport@apogeeinstruments.com.

2. For warranty evaluations, send all RMA sensors and meters back in a clean condition, with cords clean. Do not modify sensors or wires (splicing, cutting, etc.). If a connector has been attached to the cable end, include the mating connector; otherwise, the sensor connector may be removed for repair/recalibration. For routine calibration of sensors with standard stainless-steel connectors, send only the sensor with a 30 cm section of cable and one-half of the connector.

3. Write the RMA number on the outside of the shipping container.

4. Return the item with freight pre-paid and fully insured to the factory address: Apogee Instruments, Inc., 721 West 1800 North, Logan, UT 84321, USA. Apogee is not responsible for costs associated with international transportation.

5. Upon receipt, Apogee Instruments will determine the cause of failure. Defective products will be repaired or replaced free of charge. If the product is not covered under warranty, the customer will be informed of estimated repair/replacement costs.

Products Beyond the Warranty Period

For issues with sensors beyond the warranty period, contact Apogee at techsupport@apogeeinstruments.com to discuss repair or replacement options.

Other Terms

The sole remedy for defects under this warranty is the repair or replacement of the original product. Apogee Instruments is not liable for any direct, indirect, incidental, or consequential damages, including but not limited to loss of income, revenue, profit, data, wages, time, sales, or expenses, or injury to personal property or persons.

This limited warranty and any disputes arising from it shall be governed by the laws of the State of Utah, USA, excluding conflicts of law principles and the Convention for the International Sale of Goods. The courts located in Utah shall have exclusive jurisdiction over any disputes.

This warranty grants specific legal rights, and customers may have other rights that vary by state and jurisdiction. This warranty is non-transferable or assignable. If any provision is unlawful, void, or unenforceable, it shall be deemed severable and shall not affect remaining provisions. In case of inconsistency between English and other versions, the English version prevails. This warranty cannot be changed or amended by any other person or agreement.