VICI 230 Dynacalibrator - Manual (Page 25)

21
Analyzer Calibration
After the power-up procedure has been com pleted and the chamber temp-
erature and permeation device have reached equilibrium, the Dynacalibrator is
ready to be connected to the analyzer being calibrated. Use a minimum length
of tubing for the connection, and make sure none of the calibrator’s vents are
blocked.
If the Model 230 is to be used for a multipoint calibration and is equipped with
the internal pump option:
1. Connect the zero outlet to the analyzer input and wait for the analyzer read-
ing to stabilize (usually about ten minutes) before calibrating or
recording the reading.
2. Disconnect the zero outlet and connect the span outlet to the analyzer input.
3. Adjust the dilution flow control valve for each of the pre-calculated span points,
aligning the center of the float in the dilution flowmeter to the selected scale
reading. Allow the analyzer reading to stabilize after each flow adjustment.
Shutdown Procedure
Dynacalibrators are designed to operate continuously; however, if it is necessary
to turn the unit off, use the following procedures:
1. Turn off the heater power switch.
2. With the tool provided, rotate the panel lock screw 90° counterclockwise.
3. Gently pull the front panel assembly out.
CAUTION: Use specific and appropriate precaution when
opening the calibrator oven. Use procedures and protective
equipment to avoid contact or exposure to the permeation
device and/or gas vapors while opening the chamber cap
and adding/removing/changing oven content.
4. Unscrew the chamber cap with the tool provided.
5. Add or remove the permeation device(s) with the supplied forceps.
6. Secure the chamber cap with the tool provided,
7. Reinstall the front panel assembly and rotate the panel lock screw
90° clockwise.
8. Place devices in the containers provided and store them in an appropriate
place until further use is required. (A refrigerator or freezer is recommended.)
9. Allow the carrier flow to purge the chamber for about five minutes
10. Switch off the main power.
11. If the unit will be left unpowered for an extended length of time, disconnect
all the plumbing from the rear panel inlets and outlets and cap them.
When repowering the unit, always perform the start-up procedures starting on
page 13.