ADP1000 User Guide: Difference between revisions
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<metadesc>Connect a pH probe or any voltage-based probe that uses a BNC connector to your VINT port with pH Phidget.</metadesc> | |||
[[Category:UserGuide]] | [[Category:UserGuide]] | ||
==Part 1: Setup== | |||
{{PT1 Deck Sequence}} | |||
== Part 2: Using Your Phidget == | |||
=== | ===About=== | ||
The ADP1000 with a pH or ORP probe measures pH (0-14) or gets raw voltage input from the probe '''(±400mV or ±2V)'''. For more accuracy, set the temperature of the solution in the software. | |||
[[Image:ADP1000_About.jpg|600px|link=|center]] | |||
===Explore Your Phidget Channels Using The Control Panel=== | |||
You can use your Control Panel to explore your Phidget's channels. | |||
'''1.''' Open your Control Panel, and you will find the following channels: | |||
[[Image:ADP1000_Panel.jpg|link=|center]] | |||
'''2.''' Double click on a channel to open an example program. Each channel belongs to a differemt channel class: | |||
{{UGC-Start}} | |||
{{UGC-Entry|PH Sensor Input:| Measures the pH from the attached probe| | |||
In your Control Panel, double click on "PH Sensor Input": | |||
[[Image:ADP1000-PHSensor.jpg|center|link=]]}} | |||
{{UGC-Entry|Voltage Input:| Measures the raw voltage value from the attached probe| | |||
In your Control Panel, double click on "Voltage Input": | |||
[[Image: | [[Image:ADP1000-VoltageInput.jpg|center|link=]]}} | ||
{{UGC-End}} | |||
{{UG-Part3}} | |||
== Part 4: Advanced Topics and Troubleshooting == | |||
{{UGC-Start}} | |||
{{UGC-Addressing}} | |||
{{UGC-Graphing}} | |||
{{UGC-DataInterval}} | |||
{{UGC-Firmware}} | |||
{{UGC-Entry|pH Temperature Correction|| | |||
The ADP1000 automatically converts raw voltage (from the pH probe) into an extremely accurate pH reading. For even more accuracy, you can set a Correction Temperature. The Correction Temperature corresponds to the temperature of the solution you are measuring (in °C). Here are a few examples of how temperature affects the output voltage of a pH probe: | |||
[[Image:ADP1000-TempTables.jpg|center|link=]] | |||
As you can see from the examples above, temperature has a greater impact on solutions that have a pH further away from 7. | |||
For | If you want to monitor the temperature of your solution, you can use a thermocouple. Check out our {{CT|TCInterface|Thermocouple Interfaces}} to get started. For more information about how to set a Correction Temperature, view the {{Phidget22API}}. | ||
}} | |||
{{UGC-Entry|My probe reading is incorrect and it fluctuates when I place my hand near it|| | |||
When the probe dries out, it becomes more sensitive to interference. Even static electricity on your clothes can warp the reading. To solve the problem, immerse the probe in a buffer solution overnight. | |||
}} | |||
{{UGC-Entry|Probe Cleaning and Maintenance|| | |||
See the [[PH/ORP Sensor Guide]] for more information. | |||
}} | |||
{{ | {{UGC-End}} | ||
Latest revision as of 19:37, 1 June 2023
Part 1: Setup
Part 2: Using Your Phidget
About
The ADP1000 with a pH or ORP probe measures pH (0-14) or gets raw voltage input from the probe (±400mV or ±2V). For more accuracy, set the temperature of the solution in the software.
Explore Your Phidget Channels Using The Control Panel
You can use your Control Panel to explore your Phidget's channels.
1. Open your Control Panel, and you will find the following channels:
2. Double click on a channel to open an example program. Each channel belongs to a differemt channel class:
In your Control Panel, double click on "PH Sensor Input":
In your Control Panel, double click on "Voltage Input":
Part 3: Create your Program
Part 4: Advanced Topics and Troubleshooting
Before you open a Phidget channel in your program, you can set these properties to specify which channel to open. You can find this information through the Control Panel.
1. Open the Control Panel and double-click on the red map pin icon:
2. The Addressing Information window will open. Here you will find all the information you need to address your Phidget in your program.
See the Phidget22 API for your language to determine exact syntax for each property.
Note: Graphing and logging is currently only supported in the Windows version of the Phidget Control Panel.
In the Phidget Control Panel, open the channel for your device and click on the 
icon next to the data type that you want to plot. This will open up a new window:
If you need more complex functionality such as logging multiple sensors to the same sheet or performing calculations on the data, you'll need to write your own program. Generally this will involve addressing the correct channel, opening it, and then creating an Event Handler and adding graphing/logging code to it.
The quickest way to get started is to download some sample code for your desired programming language and then search google for logging or plotting in that language (e.g. "how to log to csv in python") and add the code to the existing change handler.
Filtering
You can perform filtering on the raw data in order to reduce noise in your graph. For more information, see the Control Panel Graphing page.
Graph Type
You can perform a transform on the incoming data to get different graph types that may provide insights into your sensor data. For more information on how to use these graph types, see the Control Panel Graphing page.
The Change Trigger is the minimum change in the sensor data needed to trigger a new data event.
The Data Interval is the time (in ms) between data events sent out from your Phidget.
The Data Rate is the reciprocal of Data Interval (measured in Hz), and setting it will set the reciprocal value for Data Interval and vice-versa.
You can modify one or both of these values to achieve different data outputs. You can learn more about these properties here.
Firmware Upgrade
MacOS users can upgrade device firmware by double-clicking the device row in the Phidget Control Panel.
Linux users can upgrade via the phidget22admin tool (see included readme for instructions).
Windows users can upgrade the firmware for this device using the Phidget Control Panel as shown below.
Firmware Downgrade
Firmware upgrades include important bug fixes and performance improvements, but there are some situations where you may want to revert to an old version of the firmware (for instance, when an application you're using is compiled using an older version of phidget22 that doesn't recognize the new firmware).
MacOS and Linux users can downgrade using the phidget22admin tool in the terminal (see included readme for instructions).
Windows users can downgrade directly from the Phidget Control Panel if they have driver version 1.9.20220112 or newer:
Firmware Version Numbering Schema
Phidgets device firmware is represented by a 3-digit number. For firmware patch notes, see the device history section on the Specifications tab on your device's product page.
- If the digit in the 'ones' spot changes, it means there have been bug fixes or optimizations. Sometimes these changes can drastically improve the performance of the device, so you should still upgrade whenever possible. These upgrades are backwards compatible, meaning you can still use this Phidget on a computer that has Phidget22 drivers from before this firmware upgrade was released.
- If the digit in the 'tens' spot changes, it means some features were added (e.g. new API commands or events). These upgrades are also backwards compatible, in the sense that computers running old Phidget22 drivers will still be able to use the device, but they will not be able to use any of the new features this version added.
- If the digit in the 'hundreds' spot changes, it means a major change has occurred (e.g. a complete rewrite of the firmware or moving to a new architecture). These changes are not backwards compatible, so if you try to use the upgraded board on a computer with old Phidget22 drivers, it will show up as unsupported in the Control Panel and any applications build using the old libraries won't recognize it either. Sometimes, when a Phidget has a new hardware revision (e.g. 1018_2 -> 1018_3), the firmware version's hundreds digit will change because entirely new firmware was needed (usually because a change in the processor). In this case, older hardware revisions won't be able to be upgraded to the higher version number and instead continue to get bug fixes within the same major revision.
The ADP1000 automatically converts raw voltage (from the pH probe) into an extremely accurate pH reading. For even more accuracy, you can set a Correction Temperature. The Correction Temperature corresponds to the temperature of the solution you are measuring (in °C). Here are a few examples of how temperature affects the output voltage of a pH probe:
As you can see from the examples above, temperature has a greater impact on solutions that have a pH further away from 7.
If you want to monitor the temperature of your solution, you can use a thermocouple. Check out our Thermocouple Interfaces to get started. For more information about how to set a Correction Temperature, view the Phidget22 API.
When the probe dries out, it becomes more sensitive to interference. Even static electricity on your clothes can warp the reading. To solve the problem, immerse the probe in a buffer solution overnight.
See the PH/ORP Sensor Guide for more information.
