Granville-Phillips Mini-Convectron 275 Series, Installation, Operation And Service Instructions, Page: 31 / 52

Installation, Configuration
Mini-Convectron
®
Module with DeviceNet
®
Digital Interface 23
4.8 Checking Module
Status Check the status if the 275 Mini-Convectron Vacuum Gauge Module will not
read pressure due to a fault (alarm).
4.9 Measuring N
2
or Air Each Mini-Convectron gauge tube is individually calibrated for N
2
and
temperature compensated prior to leaving the factory. Each controller is
individually calibrated to provide accurate readout of N
2
or air pressure,
therefore, initial calibration should not be necessary.
If the tube becomes contaminated or does not read correctly, the 275 Mini-
Convectron Vacuum Gauge Module can be calibrated through DeviceNet
by performing the following procedures.
Vacuum Adjustment 1. Evacuate the chamber.
2. If you know the pressure is less than 1x10
–4
Torr, send zeroes with the
Zero Adjust Service. If the base pressure is between 1x10
–4
and 1x10
–1
,
use another gauge or pump specifications to enter the data value for the
Zero Adjust Service.
Table 4-7 Checking 275 Mini-Convectron Vacuum Gauge Module Status
Parameter Service Class Instance Attribute Data
Check Status 0E
hex
31
hex
1 07
hex
Unsigned integer,
1 byte*
* Refer to the Series Mini-Convectron and MICRO-ION Vacuum Gauge Module DeviceNet Programmers Guide , P/N 354022, for
more information.
Table 4-8 Zero Vacuum Adjust Example
Parameter Service Class Instance REAL Data
Zero Adjust 4B
hex
31
hex
1 00 00 00 00
Table 4-9 1x10
-2
Vacuum Adjust Example
Parameter Service Class Instance REAL Data
Zero Adjust 4B
hex
31
hex
1 0A D7 23 3C
hex