This Information Applies To: Agilent Autosamplers G1313A, G1329A/B, G4226A, G1367A/B/C/D/E, G7129A/B/C.
If during initialization or during a sequence, the "Metering Home Failed" error occurs, this article will guide through the procedure of identifying the cause. Sometimes, this error may also appear as "Cannot Find Metering Sensor".
Steps to follow:
Figure 1. Loosening the two capillaries of the Metering Device: the blue sample loop and the capillary coming from the injection valve
Warning: Beware the sharp needle tip: Avoid touching it so as not to get pierced.
Remove the safety cover (Figure 3), then lift and flip the wash port to the left into the service position (Figure 4).
Figure 2. Lab Advisor Injector Steps - Needle Up
Figure 3. Removing the Safety Cover
Figure 4. Flipping back the Wash Port
Figure 5. Front view of the G1313X and G1329X Autosampler: 1 - Safety cover, 2 - safety flap
Next, click Down until the needle screw is aligned with the hole in the safety cover (Figure 6) and loosen the loop capillary from the needle assembly (Figure 7).
Figure 6. Alignment of the Needle Screw with the hole in the Safety Cover
Figure 7. Loosening the Loop Capillary.
Flush the loop by closing the purge valve. Remember to collect the solvent flowing out the loop end. Afterwards, reconnect the loop capillary to the needle assembly and move up the needle sufficiently (by clicking Up). Flush through both loop and needle, collecting the flow coming out of the needle tip (be cautious not to pierce yourself). Next, click End to reposition the safety flap around the needle. Replace the front cover of the autosampler and reset the module. Go on with step 5.
Figure 8. Needle Carrier Arm of the G1367 and G4226 modules. 1 - Leak guide. 2 - Wrenches to loosen the Needle Assembly. 3 - Holder Clamp
Figure 9. Injection valve ports, standard configuration - Connections: 1 - From pump; 2 - To metering device; 3 - Plug; 4 - To waste; 5 - From needle seat; 6 - To analytical column
If this does not solve your issue, then please contact your local Agilent Support representative for more help.
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