DPI 611 – Calibratore di pressione portatile

The weight of the sensor is approximately 450 to 900 g depending on the configuration.

The specifications on page 5 of the datasheet apply to both the calibrators internal sensor and external/remote sensor (Option B1).
For a range of -1 to +1 bar we calculate the positive direction as ±0.025% FS = ±0.00025 bar.
But for the negative direction we use the Compound Range instead of FS to calculate the specification.

-1 to +1 bar = a Compound Range of 2 bar.
Therefore for the negative direction the specification would be: – 2 bar x 0.025% = ±0.0005 bar

For a range of -1 to +3.5 bar we calculate the positive direction as ±0.025% FS = ± 0.000875 bar.
But for the negative direction the compound range will be -1 to +3.5 = 4.5 bar.
Therefore for the negative direction the specification would be:- 4.5 bar x 0.025% = ±0.00113 bar.

Where we quote the accuracy on the datasheet as 0.025% FS and the instrument has a negative calibration then the specification for the negative direction is ±0.025% of Compound Range.

The specification for the Negative direction is ±0.025% of the Compound Range (-Ve FS plus +Ve FS)
For example if the instrument range was -1 to 20 bar then the Compound Range will be 21 bar.

For DPI 610 external sensors use the part number IO610B-1.
You will need to specify the pressure range and pressure connection on your order.

Calibration will not be required.
All calibration data is stored on the mainboard, just exchanging the display board will not affect the calibration.

NOTE:- We only supply the mainboard and display as an assembly, if this is replaced then calibration is required.

The recommended recalibration period is 12 months.
However the instrument has a stability of 0.015% of reading per annum therefore the actual calibration interval will depend on the total measurement uncertainty acceptable for your application.

The sensor is calibrated externally to the instrument on a production calibration rig.
The sensor is calibrated on oil but the front end of the sensor is then washed out to remove the oil.
The sensor is then fitted to the DPI610E Hydraulic Calibrator, pressure testing and leak tests are then carried out using demineralised water.

This may be caused by the button on the Battery Status indicator being permanently in the “on” state.
Check for any signs of damage to the button.
The Battery Status Indicator is not available as a spare therefore the case top will need to be replaced.
Case Top Assembly, part number IS610E-FRONT-ASSY

Note – Having the Battery Status indicator permanently on will not affect the operation of the instrument it will just slightly shorten the time between charges.

Pressure ranges 1 to 20 bar are calibrated from -1 bar to the positive full-scale pressure.
The 350 mbar range is calibrated ±350 mbar.
Ranges of 35 bar and above do not have a negative calibration.

The Leak Rate for Pneumatic versions is 50 mbar/min.
For the Positive direction use a wait time of 60 seconds for 20 and 35 bar units, for units less than 20 bar use a wait time of 30 seconds.
The Leak Rate is then measured over the next 30 seconds.
For the Negative direction use a wait time of 30 seconds.
The Leak Rate is then measured over the next 30 seconds.
The Leak Rate for Hydraulic versions is 1.5 bar/min
Use a wait time of 30 seconds.
The Leak Rate is then measured over the next 30 seconds.
Compared to the DPI 610 Leak Test we are using a much shorter wait time so the Leak Rate specification is higher.
On the DPI 610 we used a wait time of 4 minutes and a measure time of 1 minute so we were giving the pressure much longer to stabilise.
We would expect if you use a wait time of 4 minutes you will get a Leak Rate much less than 50 mbar/min.

There is no problem using the power adapter with a DPI 611 that has AA alkaline batteries fitted, protection is in place to prevent the batteries from being charged.

Typically a change in the reading of approximately 0.00040 bar can be seen.

The battery charging time is 6 hours.

The main thing that will affect the battery life is the intensity of the backlight.
Under normal operation with the settings shown below the running time should be around 12 hours.

The part number for the Standard Accuracy internal sensor is IA2975.
You will be asked to specify the pressure range and pressure connection (G1/8 or 1/8NPT) on your request.

You can use the Scaling Function on the DPI 800/802 to create a “metres of Sea Water” scale.
To Setup the Scaling Function:
With the pressure reading displayed select the Settings menu.
Next select P1 Pressure and press the Menu/OK key.
From the menu tick/check the box next to “x=y” using the Menu/OK key.
Then press the right hand square key to edit the parameters for P1 Scaling.
NB For reference you can refer to section 1.7 of the User Manual K0335.

To over-ride an unknown pin use the pin 0800 followed immediately by pressing the HOLD key. NOTE:- This applies to all models within the DPI 800 series.

The display updates at two times per second (response time = 0.5 sec).

“IDOS Disconnected” is displayed when trying to calibrate IDOS sensor on DPI800/802

This is likely to be caused by a bug in the instruments firmware. Check the status menu to see what version of firmware (DK246) is installed. If the firmware is older than
V06.04.03 then it will require upgrading to the latest version. NOTE:- This applies to all variants of the DPI 800 series apart from the DPI 880