Fluke 9118A User Manual page 86

9118A
Users Manual
Table 18. Skew Correction Values for Isothermal Block
Calibration Point
300
700
1000
1200
10. Put the SKEW (new) value into the Product through
n
the front panel or RS-232 port. Table 19 is a list of
temperature setpoints and the RS-232 command and
front-panel name for the SKEW parameters.
Table 19. SKEW Parameter for Isothermal Block
Setpoint
(°C)
RS-232 Command
300 SOUR:SENS:CAL:SKEW1
700 SOUR:SENS:CAL: SKEW 2
1000 SOUR:SENS:CAL: SKEW 3
1200 SOUR:SENS:CAL: SKEW 4
11. Let the Product soak for 90 minutes for the calibration
points of 700 °C, 1000 °C, and 1200 °C. Let the
Product soak for 180 minutes for calibration points of
300 °C after you put in the SKEW value.
76
A value
0.78
2.14
3.67
4.90
Parameter
Front Panel
SKEW (300)
SKEW (700)
SKEW (1000)
SKEW (1200)
12. Do steps 1 through 5 again to make sure axial
uniformity is equal to or less than the specification or
requirement.
If the axial uniformity already meets the
specification or requirement, it is not necessary to
continue with the following zone adjustment. It is
recommended that you do steps 6 through 12
again if the result cannot meet the specification or
the necessary requirement. If the slope is
and the axial uniformity still cannot meet
specification, then go the following zone
adjustment. If the absolute value of slope of every
adjustment does not show the trend of decreasing,
contact an authorized Fluke Calibration Service
Center.
13. Calculate a curve as the peak to peak value from the
table of difference(x) from 0 mm to 60 mm. For
example, the maximum value is 0.1 °C and the
minimum value is -0.1 °C, then the curve is 0.2 in this
case.
Curve = Maximum(Difference(0), ... Difference(60)) – Minimum
(Difference(0), ... Difference(60))
14. Calculate the ZONE value with:
ZONEn(new) = ZONEn(old) + B x (Curve)
Note
< °
0.1 C