1. Introduction
The (optional) data logger which is located in the Transmitter / display enables you to record the measurement data: flow, pressure, temperature, and totalizer.
The way data is stored and the interval on which the data is collected can be adjusted pending your applications.
In this chapter we will cover:
| Guidelines for the measurement interval |  |
| Feedback from the data logger | |
| How to adjust the settings via the Transmitter |  |
| How to adjust the settings via the Display |    |
2. Overview of data logging modes
Data will only be recorded when a VPSensorCartridge / sensor is connected and when the main power is connected.
| Cyclic mode: Install and forget mode. |  |
 | Changing the mode will remove all stored data! |
2.1 Cyclic mode
Data will be recorded immediately and at all times when the power is applied and a VPSensorCartridge is connected.
| Measurement interval: once every sec. per parameter | |
| Total capacity is at least 12 months |  |
| Total capacity when the recording for all parameter is set to 1 a sec. is at least a week. | |
| Data is logged in 1 data log session |
When the memory is full, the oldest data will be overwritten.
2.2 Guidelines for the measurement interval
Only applicable to multisession mode.
Keep the goal of your measurement in mind when setting the measurement interval.
Keep in mind that a smaller interval:
- Results in more data to analyze.
- Gives more fluctuations in data.
Here are some industry-standard guidelines:
| Application | Flow | Pressure | Temperature |
| Standard energy management | 5 min | 5 min | 5 min |
| Machine testing – quick fluctuations | 1 sec | 1 sec | 1 sec |
| Audit – one week | 10 sec | 10 sec | 5 min |
| Audit – one month | 30 sec | 30 sec | 5 min |
3. Data logger feedback
The display of the display provides feedback:
| Blinking dot: the flowmeter is recording data, during the logging session the menu will be blocked. | |
| Blocks: the memory capacity of the data logger, each block represents 20% | |
4. Adjusting manually via the Display
The options can be found in the Menu >> Datalogger / DAQ Sessions.
Use the up and down keys to navigate through all of the options. Use Enter to save your setting.
| Changing the mode will remove all stored data! |
The options in the menu of the Display are:
| Mode | Explanation |
| Start Session | The session will be started when the button is pushed after selecting this option. |
| Delete all | All of the stored sessions will be deleted. It is not possible to delete a single session. |
5. Adjusting via VPStudio software
In VPStudio unfold the menu settings of the flow meter and select “Datalogger”.
Go to the tab “Settings”.
- The memory usage is indicated as a percentage.
- Select at Data logger mode: Cyclic or Multisession.
In the case of Cyclic mode: You are finished. Just press “Save”.
In case of the Multisession mode:
- Select per measurand the desired measurement interval.
- Click “Save”.
Adjusting the settings, via VPStudio, for the VPFlowScope DP, In-line and Probe are almost the same as for the VPFlowScope M. The difference between the two can be found in the available options, the options from which you can choose are given and explained in the table above.
5. Adjusting via Modbus
Adjusting the data logger via the Modbus is not possible, the only way to change the data logger is via the Transmitter / display or VPStudio.
6. Next Step
Explore further functionalities of your flow meter:
| For the VPFlowScope M C8. set an alarm with your flow meter. | |
| Change the display settings of the Transmitter go to C2.2 VPFlowScope M display settings | |
| For the Display, settings go to C2.4. VPFlowScope display settings | |
| Set date and time go to C4. Date and Time settings | |
| To reset or restart the flow meter go to C10. Reset and restart settings | |
If you do not want to change these settings it is important to start with the mechanical installation of the VPFlowScope. This will be explained in chapter D1. Select the right installation point.