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6600-NG User’s Manual
125-9110A
Page 82
entered. The objective is to enter an offset that causes the Actual value to match the value of the Pressure
Standard.
An offset may be entered as a value with 4 digits after the decimal point. This allows offset entry of
values as small as ±0.0001 inHg.
Note: There are no offsets for the 0.0000 inHg and 30.0000 inHg points for the Pt output. Also, there
are no offsets for the 1.6000 inHg and 38.000 inHg points for the Ps1 and Ps2 output.
Note: When offset values are entered, they are actually added to the existing offset value already
resident in the 6600-NG.
Verification Procedure
1.
Generate the pressures shown in the Verification points table for a specific point.
2.
Only for point 1, wait at least 5 minutes to allow temperature effects to stabilize. For other points,
wait at least 1 minute.
3.
If an offset needs to be entered for the point, enter it through the RS232 port.
4.
Note the Actual values (after the offset has been entered), for Pt, Ps2 and Ps1, on the calibration
report.
5.
Repeat steps 1 through 4 for all the 21 points in the table.
6.
The verification process is complete.
7.
If you wish to record the offsets stored in the 6600-NG (recommended), then through the RS232
port, send the ‘SO=0’ command to see all the Ps1 offsets, the ‘SO=1’ command to see all the Pt
offsets and command ‘SO=2’ for all the Ps2 offsets. The offsets will be displayed in 5%
increments. Although the offsets for the 5% points are never entered, these values are
interpolated based on the 10% offset values. Please bear in mind that the offsets displayed may
not match what you entered in step 3 above. This is because the entered value is added to the
existing value already stored in the 6600-NG.