The resulting chromatogram and associated measurement data reports are then transmitted to the web-server. The eGC can be configured for either 12VDC or 120VAC power. The low power consumption of the eGC (< 60 Watts) makes solar-powered operation an attractive option.
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“eGC” Quick Guide Rev. 2 The ENMET eGC is typically shipped in two pieces to minimize the possibility of shipping damage. It is recommended to save the eGC shipping containers. ) The largest piece is the external plastic enclosure box. The other piece is the internal GC “engine” box. Opening the exterior enclosure reveals a space, defined by four (4) screw holes, where the GC engine will be mounted (figure 1).
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The GC “engine” is the smaller metal box with two metal mounting brackets that have holes that line up with the four screw holes in the enclosure mounting plate (fig. 2). Figure 2. eGC “engine” box Figure 3. eGC engine installed into the exterior enclosure.
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NOTE: Failure to connect the external scrubber, or, failure to replace a depleted scrubber can result in significantly shortened operating life of the eGC. There are no other “user serviceable items” in the eGC. Call ENMET for all service issues.
Attach the eGC engine to the enclosure using four (4) flat- head Philips screws (supplied). STEP 2. Locate the (4) mounting holes near the fan grill on the side of the eGC enclosure. Attach the plastic fan vent cover using (4) 4-40 x ½” Philips head screws (supplied).
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“eGC” Quick Guide Rev. 2 STEP 3. Make sure the carrier gas scrubber cartridge is installed into the door bracket using the Velcro strap (see figure 4). STEP 4. Connect the plastic male Luer fitting on the carrier gas inlet tubing to the...
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Connect the thermoelectric cooler power cable. STEP 7. Insert the thermocouple from the data logger into the fitting on the top of the eGC engine box. The thermocouple must be inserted until stopped by the black heat-shrink on the wire...
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Gas flowing into the ¼” Swagelok fitting is immediately vented to a port on the side of the inlet block. When the eGC is ready to collect a sample, it simply pulls in a side-stream sample from the TEE at a flow rate of about 250 sccm.
If the unit is configured for 120V AC Power, then plug the power cable into the power cord connector on the power entry module at the bottom of the eGC. Plug the other end into a 120VAC wall power receptacle.
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If the unit is configured for 12V DC Power, then plug the DC power cable into the 2-pin circular connector on the power entry module at the bottom of the eGC. Connect the other end to a source of 12V DC power (e.g., a car battery, 12VDC power supply or solar panel power module).
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“eGC” Quick Guide Rev. 2 side pressure again. If the high-pressure side needle has dropped during the 5 minute wait period then there is a significant leak in the system and calibration gas will be lost over time. If this occurs, check all Swagelok connections for tightness and check for leaks again by closing cylinder “MAIN”...
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(e.g., for 30 minutes) to reach its operating temperature. (NOTE: Wait at least 30 seconds after turning the eGC OFF before turning it ON again or the current surge may blow the 120VAC fuse on the AC power inlet.)
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“eGC” Quick Guide Rev. 2 When the measurement is complete then the results will be displayed until the next measurement begins.
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4 times every day (i.e., at 0000, 0600, 1200 and 1800 GMT). “Calibration” consists of the eGC energizing a small solenoid valve on the sample inlet block to turn on the flow of calibration gas. The measured GC peak height...
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This process will continue until the concentrations of all of the calibration vapors (e.g., benzene, toluene, and xylene) have been updated. It is strongly recommended that following initial un-packing and set-up, that the eGC be turned on and stabilized for 24 hours prior to accepting the reported vapor concentrations as valid.
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