Exchanging The Empv Assembly - Agilent Technologies 1100 Series Service Manual

Exchanging the EMPV Assembly

Frequency
Tools required
Parts required
Exchanging the complete EMPV
1 Turn the pump off.
2 Remove the pump from the stack and remove the top cover and foam.
3 Using a 1/4 inch wrench disconnect the capillaries:
4 Disconnect the waste tube. Beware of leaking solvents due to hydrostatic
5 Disconnect the EMPV connector (P9) on the main board see
6 Using a hex key, unscrew the complete EMPV and remove it.
7 Screw a new one in place.
8 Reconnect the capillaries:
9 Run the EMPV test see
1100 Series Nano Pump Service Manual
If valve internally leaking
If unstable column flow in micro mode
If column flow and system pressure drops from time to time.
Wrench 1/4 inch
Wrench 14 mm
Wrench 7/16 inch
EMPV assembly G1361-60000
• going to the flow sensor.
• coming from the filter.
pressure.
page 135.
• going to the flow sensor.
• coming from the filter.
"EMPV Test" on page 84.
Repairing the Pump
Figure 22 on
117
3