J Datastore 7.02 serial key or number

How long will the internal battery last?
Most of the dataTaker DT80 range of loggers include an internal 6 Vdc lead acid battery that can be used as the sole power source for the logger. The battery running time will vary according to the capacity of the internal battery, complexity of the program, the volume of RS/USB/Ethernet communications, power management settings (e.g. sleep mode timeouts), sensor excitation requirements, and so on. The following table can be used as a rough guide.
 

Internal battery running time

Please see the section "battery life" in latest DT80 range user's manual for a detailed description on how to calculate the running time for specific applications.

Note: dataTaker models DT82E, DT80G, DT80L, DT80GL, DT85L, and DT85GL do not have a 6 Vdc internal battery.

IMPORTANT: These figures assume that the data logger is running firmware version or later, as there were many power saving improvements in that release. The latest firmware version can be download from the downloads page.

What happens when the internal battery is exhausted?
The logger will detect when the battery is getting too flat to operate the logger and then will force itself into a sleep state. The logger should only be restarted once power is restored. It is possible for the logger to reset if you attempt to wake the logger by button press or applying a signal to the wake terminal while the logger is in the forced sleep state.

It is good practice to set your logging Job on reset job to ensure that it will automatically start again if the logger reset due to power failure or other reasons.

With version firmware, use the Profile StartUp Run=Current_Job or Profile StartUp Run=JobName where Job name is the name of your program. For firmware versions prior to , use the RunJobOn Reset command.

Can I add a larger external 6 V battery?
Yes, an external 6 V lead acid battery can be connected and charged by the DT80/ The external battery should be connected between the 'C' and '-' terminals of the power terminal block.

WARNING: The following points should be considered before using an external 6 V battery:

• You should always disconnect the internal battery if using an external battery as connecting two batteries in parallel can cause excessive current flow between them if they are at different levels of charge. You can disconnect the internal battery by not linking B and C terminals, however VBAT measurement is not possible with this configuration. To make VBAT measurement possible you should remove the internal battery (i.e. disconnect the battery at the cables internally) and then link B and C terminals.
• Care must be taken when installing the external battery to ensure it is kept at a similar temperature to the actual logger as the charger is temperature compensated. If the difference in temperature is excessive, then the charger will not charge the battery efficiently.
• Larger capacity lead acid batteries take longer to charge. The suggested maximum rating of the external battery is 4 A/hr unless an external charging system is used.

Note: The DT85 already includes an internal 4 A/hr so there is no advantage in connecting an external 6V battery as suggested here for the DT80/

How do I charge a large external 6 V battery?

If the external 6 V battery is larger than 4 A/Hr, then a separate charging circuit must be used. The internal battery must also be disconnected and the B-C link removed. In this configuration, no other power supply should be connected to the DT80 range loggers.

How do I use a 12 V battery?

The DT80 range loggers cannot charge 12 V batteries so a separate charging circuit must be used. The internal battery may be left connected or can be disconnected if you wish. If the internal battery is connected, it will provide UPS functionality to allow for short disconnection of 12 V power, for example, during maintenance, but this configuration will reduce the overall power system efficiency slightly.

What happens when the battery is exhausted?
The DT80 range loggers will automatically enter low power sleep mode when the battery voltage drops below a threshold. All data is logged to non-volatile flash memory so no data will be lost. A lithium backup battery maintains date/time and other settings even if the main battery is completely flat. The logger will wake automatically when external power is re-applied.

How often should I replace the lithium battery?
This depends on the usage of the DT80 range logger. If it is always connected to a power supply, replace the battery every three to four years. If it spends a long time on the shelf is only used occasionally, once a year replacement would be required. If you are about to deploy the DT80 range on critical tasks, and you don’t know the last time the batteries were changed, it would be best practice to replace the batteries to ensure your data is safe.

How is the battery level displayed?
The standard display (not available with DT81) indicates current internal battery voltage, current draw, and ‘state’ (charging or discharging). Battery and power supply conditions can also be measured, logged, and alarmed using as part of the DT80 range logger program. The TEST command also returns battery and power supply operating details to a PC using dEX or deTransfer.

NOTE: Battery level in % is displayed but the calculation is only approximate.

What happens if the external supply fails?
The DT80 range logger will continue to run as programmed from the internal 6 V battery until the external supply is restored.

NOTE: The logger may go into low power mode depending on the actual application requirements and logger programming.

Can I power using an external battery?
Yes, you may use 10–30 VDC via main power input terminals or 6 VDC Lead Acid via external battery terminals.

NOTE: Note special considerations when using external 6 V batteries.

Can I use a non-standard external power supply (for example, 24 VDC)?
Yes, you may use a 10–30 VDC via main power input terminals or coaxial connector, with approximately 12 W minimum rating required.

What is the average power consumption when powered from an external source?
The following table can be used as a rough guide when powering the logger from an external 12 Vdc source. Please see the section "Power consumption" in the latest DT80 range user's manual for more detailed information.

IMPORTANT: This table assumes the logger is running firmware version or later, which includes various additional power saving measures. Also note that loggers produced before May will consume an additional mW for all scan rates.

Average power consumption

Can I connect directly to a solar panel for power?
Yes, however for best performance and battery life, we suggest the use of a solar conditioner or regulator.

How can I reduce power consumption?
Most importantly, you should ensure you are running the latest version of firmware. Firmware version and later include additional power saving measures that can significantly reduce power consumption. Please see the section "Minimising Power Consumption" in the latest DT80 range user's manual for more details on how to reduce the logger's power consumption.

In addition, you should also consider the overall power consumption of the whole system you are using (logger, sensors, modems, etc.) and ensure that devices are only powered as necessary. You can use the relay (1RELAY) on the logger to automatically turn devices on and off as required by the logger's program.

Can the USB port power DT80 range loggers?
No.

Does the DT80 range loggers have a 5 VDC supply for sensors like the DT?
The DT8x Range series 3 has a 5 VDC power supply on the analog section to provide power to sensors.

What other power options for sensors are available?
The DT85 and all series 2 and 3 models in the DT80 range do have a 12 V regulated mA max switched output.

The DT80 range loggers provide a number of sensor excitation methods.

1. Switched excitation of V, uA or mA.
2. Switched excitation from an external supply.
3. Excitation using the Latching Relay.
4. 12 V regulated mA max switched output. (DT85 and all series 2 models only)
5. Power output terminal (current limited to mA max) that reflects the external power applied to the logger. (DT85 only)

The 6 V battery and main power supply may be used for sensor supply if care is taken with regard to ground loops and common mode.

NOTE: Switched excitation is only available to that particular channel while it is being measured. Methods 2 and 3 require an external power supply be connected to the appropriate terminals.

How can I control power to a modem?
The DT80 range loggers can control power to a modem or other external device using the Latching Relay, alternatively using the digital output functions to control an external relay. Additionally, the DT85 and DT80 (Series 2 only) can also power low power modems via the 12 V output terminal.

NOTE: Output functions can be controlled by Alarms, keypad Functions, schedules, or DO and IF commands.

How do I tell if external power fails?                      

• Visually–The display backlight will switch off (DT80/85) or the Power LED will change from a long 3 sec blink to a short 3 sec blink (DT81/85). Note that this visual indication will not be available if parameter P16=32 as this disables all LEDs and the backlight to conserve power.
• Programatically–The DT80 has an internal channel to measure the supply voltage. Add the command VExt to your program, and the supply voltage will be logged with your data. The internal channels can also be used in alarms.

• Historically–the times at which external power failed and recovered are recorded in the event log (type UEVTLOG to view).

Examples

Summary

The Store class encapsulates a client side cache of cromwellpsi.com objects. Stores load data via a cromwellpsi.com, and also provide functions for sorting, filtering and querying the cromwellpsi.com instances contained within it.

Creating a Store is easy - we just tell it the Model and the Proxy to use for loading and saving its data:

In the example above we configured an AJAX proxy to load data from the url '/cromwellpsi.com'. We told our Proxy to use a cromwellpsi.com to parse the response from the server into Model object - cromwellpsi.com for details.

Inline data

Stores can also load data inline. Internally, Store converts each of the objects we pass in as cfg-data into Model instances:

Loading inline data using the method above is great if the data is in the correct format already (e.g. it doesn't need to be processed by a cromwellpsi.com). If your inline data requires processing to decode the data structure, use a cromwellpsi.com instead (see the cromwellpsi.com docs for an example).

Additional data can also be loaded locally using method-add.

Dynamic Loading

Stores can be dynamically updated by calling the method-load method:

Here a bunch of arbitrary parameters is passed along with the load request and a callback function is set up to do something after the loading is over.

Loading Nested Data

Applications often need to load sets of associated data - for example a CRM system might load a User and her Orders. Instead of issuing an AJAX request for the User and a series of additional AJAX requests for each Order, we can load a nested dataset and allow the Reader to automatically populate the associated models. Below is a brief example, see the cromwellpsi.com intro docs for a full explanation:

Which would consume a response like this:

See the cromwellpsi.com intro docs for a full explanation.

Filtering and Sorting

Stores can be sorted and filtered - in both cases either remotely or locally. The cfg-sorters and cfg-filters are held inside cromwellpsi.comtion instances to make them easy to manage. Usually it is sufficient to either just specify sorters and filters in the Store configuration or call method-sort or filter:

The new Store will keep the configured sorters and filters in the Collection instances mentioned above. By default, sorting and filtering are both performed locally by the Store - see remoteSort and remoteFilter to allow the server to perform these operations instead.

Filtering and sorting after the Store has been instantiated is also easy. Calling filter adds another filter to the Store and automatically filters the dataset (calling filter with no arguments simply re-applies all existing filters).

Change the sorting at any time by calling method-sort:

Note that all existing sorters will be removed in favor of the new sorter data (if method-sort is called with no arguments, the existing sorters are just reapplied instead of being removed). To keep existing sorters and add new ones, just add them to the Collection:

Registering with StoreManager

Any Store that is instantiated with a storeId will automatically be registered with the cromwellpsi.comanager. This makes it easy to reuse the same store in multiple views:

Further Reading

Stores are backed up by an ecosystem of classes that enables their operation. To gain a full understanding of these pieces and how they fit together, see:

configs