Rosemount 7D, Инструкция по эксплуатации

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I
NITIAL
S
TARTUP
748221-L Rosemount Analytical December 2000 21
Model 7D Thermal Conductivity Analyzer
3.4 CALIBRATION
1. Set downscale calibration point as follows:
a. On the analyzer, set front-panel SPAN control to midscale (five turns). If the
analyzer has front-panel RANGE Switch, set it at Range 1, the highest
sensitivity range.
b. Admit downscale calibration gas to the analyzer at the same flow rate as is
used for sample gas. Wait for the reading on the meter or recorder to stabilize.
c. On the analyzer, adjust the front panel ZERO control so that the reading on the
front panel meter or recorder is appropriate to the downscale calibration gas.
d. If a proper reading is unobtainable by adjustment of the ZERO control, refer to
Section 6.2.2.
2. Set upscale calibration point as follows:
a. If the analyzer has a front panel RANGE switch, set it for the desired range.
b. Admit upscale calibration gas to the analyzer at the same flow rate as is used
for sample gas. Wait for the reading on the meter or recorder to stabilize.
c. On the analyzer, adjust the front panel SPAN control so that the reading on the
front panel meter or recorder is appropriate to the upscale calibration gas.
If a proper reading is unobtainable by adjustment of the SPAN control, refer to Section
6, Service and Maintenance.
After the downscale and upscale calibration points have been established, the
analyzer is ready for routine operation per Section 4.
If the analyzer has Suppressed-Zero Ranges and does not calibrate properly, refer to
Section 6.3 for Suppressed Zero Adjustment.