INFICON BPG402-SD ATM to Ultra-High Vacuum Gauge (DeviceNet) - Manual (Page 24)

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tira46e1 (2004-11) BPG402-SDv1.cp
The S-Analog Sensor Object provides the following Common Services:
Service
Code
Service Name Description of Service
0E
h
Get_Attribute_Single Returns the contents of the specified attribute.
10
h
Set_Attribute_Single Modifies an attribute value.
Service
Code
Service Name Description of Service
4C
h
Full Scale Adjust Performs a Full Scale Adjust for the Pirani
There are no state transitions associated with the invocation of this service. It is,
therefore, incumbent upon the user to establish the device into the desired con-
figuration prior to, and during the execution of this service. This will generally in-
volve exposing the sensor to a known environment and treating the values read
during execution of the services accordingly.
A success service response indicates that the service was accepted and the ap-
plication process started.
To perform the Full Scale Adjust Request vent the gauge to atmosphere and then
start the Full Scale Adjust Service with a target value as defined below .
Para-
meter
Data
Type The target value for the full scale calibration
Data
Unit
Counts mbar *) Pascal *) Torr *)
Target
Value
INT 0x7918 0x03E8 0x7FFF 0x02ED
REAL 0x46F23000 0x447A0000 0x47C35000 0x443B83F3
*) INFICON recommends to use mbar, Torr or Pascal only with the data
type REAL.
Special limitations apply for INT:
The full scale value of the gauge is 1000 mbar
10000 Pascal. But the
max. pressure of the gauge can not be described using INT and Pascal.
The target value 0x7FFF (the maximum INT value) allows to perform a
Full Scale Adjust Service for the unit Pascal.
For the data type INT and pressure values below 1 (in the actual pres-
sure unit) you always get a pressure of zero.
2.4.3 Common Services
2.4.4 Object-Specific Services
on Instance 1 / Pirani
Full Scale adjust algorithm
Full Scale Adjust Request
Service Data Field Parame-
ters