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MODEL 7561-PSDS
PORTABLE SENSOR DISPLAY – STRAIN BRIDGE
Decimal Point Position and Resolution
Because the PSDS can handle so many engineering units out of the box and allow
conversion between suitable units, such as the way it handles decimal point positions
and resolution, this model is a complete overhaul compared to the original PSD. The
original unit had only two calibration ranges (and no concept of engineering unit
conversion), therefore, each range had its own formatting settings for decimal points
and resolution. These ranges were often used to deliver results from the same strain
bridge sensor in two different engineering units.
The new PSD has six calibration ranges available where each can automatically
convert between the calibrated units and any other unit the user wants to display
the values in. Therefore, because each calibration range can display a whole range
of engineering units, setting the decimal position and resolution per range does not
work anymore. Changing from grams to tonnes would be nonsensical if they both
shared the setting for one decimal place, for example. This is even worse for resolution
settings when switching between kg and lbs, as the display would no longer count in
increments suitable for both units.
The new PSDS now supports settings for both decimal point position on a per unit
basis and resolution on a per calibration range basis.
Out of the box, the decimal point position for all units has a sensible default but these
can easily be changed using the keypad by long presses on the left and right keys.
When the user is viewing a particular unit, simply adjust with the keys and this setting
will be remembered any time that unit is selected in any calibration range or a TEDs
device is connected showing that unit. Decimal places can be set from zero to seven
The resolution is disabled by default and is unwieldy to allow changing via the keypad
or menu system, but this is fully adjustable using the Toolkit.
Resolution is stored against each Calibration Range (or in the case of a TEDS device,
per device) and is set in the base calibrated units for that range.
For the chosen display units resolution snaps to the nearest appropriate 1,2 or 5
multiple in that unit, i.e. ( .0001, .001, .01, .1, 1, 10, 100, .0002, .002, .02, .2, 2, 20, 200,
.0005, .005, .05, .5, 5, 50, 500.)
This selection works across all display modes.
TEDS (Transducer Electronic Data Sheet)
Plug and play sensor hardware and software make configuring a smart TEDS
sensor as easy as plugging a mouse into a PC. The technology has greatly improved
efficiency and productivity by completely eliminating manual sensor configuration.
Basic concept
TEDS is at the heart of the universally accepted IEEE 1451.4 standard for delivering
Plug and Play capabilities to analogue measurement and test instruments. In
essence, information in a Transducer Electronic Data Sheet provides interfacing
devices with the critical sensor calibration information in order to perform accurate
and precise measurements every time.
TEDS works in a similar way in which USB computer peripherals immediately work as
they are connected. TEDS enabled equipment may be swapped and changed without
recalibration, saving time and money.
Model 7561-PSDS User Manual |
Issue A
008-0752-00
sps.honeywell.com/ast
| 7
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