Ashcroft ATE-2 - Handheld Calibrator User Manual
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SECTION 15 m.
COMMUNICATIONS INTERFACE
The HHC can be connected to a PC running Windows XP or Win-
dows 7 or 8 via the USB port. Windows will recognize the HHC
as a Communications Port. The HHC has three communication
protocol modes:
Inquiry/Journal mode: These communications modes are
included in standard HHC models. HHC acquisition data can be
accessed via a Windows terminal emulation programs including
Windows HyperTerminal or TeraTerm.
Inquiry mode is similar to manual datalogging where a data point
will be sent to the PC based on a user defined character from the
PC keyboard.
Journal mode is similar to Automatic Datalogging mode where
the operator can set a timed interval between data points being
communicated to the PC.
In the Journal/Inquiry communications mode the HHC will output
a string indicating the current acquired data from modules and
external inputs. The string will contain the data and units for the
Channel 1, Channel 2 modules as well as the external input
(mA/V). Each item is delimited by a space character. The items
will be the same as are enabled on the HHC display.
<CH1 Module Value> <CH1 Units> <CH2 Module Value> <CH2t
Units> <External Value> <External Units>
for example:
Other communication protocols:
ISO1745: Using the standard ISO1745 communication protocol
format the HHC exposes commands for acquiring data, access-
ing internal calibration data, and accessing datalogs. ISO1745
commands and format are documented in Appendix C in section
16c of this manual.
MODBUS: This mode is optional. Using the standard MODBUS
RTU communication protocol format, the HHC exposes com-
mands for acquiring data and accessing internal calibration.
MODBUS commands and format are documented in Section 16c.
Windows programming environments that support com ports,
(Visual Basic, Visual C#, LabView, etc.), may use one of the
above modes to acquire data from the HHC.
USB Cable Installation
To expose the com port, the access cover must be removed with
a Phillips head screwdriver.
SECTION 15 m. i.
USB Cable Installation