Chandler Engineering AMETEK 7200, Инструкция по эксплуатации

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2-18 SECTION 2 – OPERATING INSTRUCTIONS
Powering On
Power to the Model 7200 CHA instrument may be applied by the oven’s power on/off switch
located on the upper left panel at the top of the oven. All major system components are
powered through this switch except the computer. Ensure that the computer is turned on.
Note: It is important that the instrument is powered up BEFORE the software is
started.
Filling the System with Test Fluids, and Initiating a Test
1. Disassemble the CHA Vessel and Stand enough to remove the bottom cap. To remove
vessel from stand:
a.
Release all pressure from all parts of vessel.
b. Rotate hand knob (Item 24 on #7200-1010 CHA Vessel w/Stand assembly drawing)
CCW (counterclockwise) to raise upper arm (Item 18).
c. Pull plunger knob (Item 19) out and rotate 90° to hold it out.
d. Raise vessel slightly from lower arm (Item 17), and tilt it and lift it to remove it from
stand.
2. Pull the lower end cap (Item 3) from the body (Sample Tube, Item 1).
3. Remove the screws (Item 5) which clamp the retainer (Item 4) to the lower cap and clamp
the diaphragm (Item 6) in place.
4. Pull the stem (with diaphragm (Item 6), washer (Item 8), and lock nut (Item 9)) upward,
partly out of the lower end cap.
5. Clean, as necessary, and reassemble the stem/diaphragm assembly (Items 6, 7, 8, 9, 14,
and 25).
DO NOT USE ANY SILICONE GREASE OR ANY OTHER LUBRICANT
ON THE DIAPHRAGM! Clamp the diaphragm (Item 6) tightly between the washer
(Item 8) and the flange on the stem (Item 7), with the rougher, sandblasted face of the
washer against the rubber diaphragm, by tightening the threaded nut (Item 9). This is
more easily done by first folding the diaphragm upward and out of the way, and using the
7/8” flat wrench (included in the #7200 - TOOLS tool kit) on the nut and a 5/8” open -end
wrench (included in the tool kit) or 7 /16” open -end wrench (included in the tool kit) on
the appropriate flats of the stem (Item 7).
6. Submerge the lower end cap and stem/diaphragm assembly into a container of water, and
reassemble underwater. This ensures that the chamber underneath the diaphragm, and the
volume inside the stem are filled with water. Make sure that an O-ring (Item 11, lightly
lubricated with silicone grease, included in the #7200-ACCESS accessory kit) is installed
around the stem, to seal it inside the lower end cap. Push the stem back down until it
stops, and place the retainer (Item 4) on top of the diaphragm, and clamp it in place, to
seal the diaphragm, with the screws (Item 6).
DO NOT USE ANY SILICONE
GREASE OR ANY OTHER LUBRICANT ON THE DIAPHRAGM! After removing
the assembly from the water, use a syringe, as necessary, to fill the passages out through
the H
2
O Confining Pressure port and Gas Injection Port with water. Plug the ports with
the provided plugs.
7. Lubricate the O-ring (Item 10) with silicone grease (included in the #7200-ACCESS
accessory kit) and install it in the groove of the retainer (Item 4). Pack more silicone
grease around the O-ring and groove, to prevent cement from setting and sticking in this
area.
8. Place this lower end cap, retainer, and diaphragm/stem assembly back into the stand,
inside the oven. Place the body (Sample Tube, Item 1) back into the lower end cap and
retainer.