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21. Perform (as left) calibration checks.
22. Place Flow Computer on line: To avoid inducing toggle and/or a
calibration shift, close vent valve, open both bypass valves, then
open orifice tap valves SLOWLY (high pressure side first). Once
both orifice tap valves are fully opened, the bypass valves can be
closed.
23. Verify that the unit is calculating volume correctly. Watch the display
or look at the Current Values in the Entry Mode of PCCU32.
24. Collect data and review the event and characteristic files to insure all
parameters are set properly.
25. Optional: When you are reasonably sure that all setup and
calibration is complete and the unit is on line calculating volume, it is
recommended that a Reset Volume command be sent from the
PCCU32 Entry Mode. This allows the unit to have what might be
considered as an official starting point for good live data. The Reset
Volume will be recorded in the Events file to mark the date and time.
Note: This is the end of the startup sequence, individual topics follow.
Installing and Wiring RTD
If the 6200EX is installed in a Div 1 area, a Div 1 approved RTD
assembly must be used. RTD kits are available from ABB Totalflow. If
the customer orders the RTD kit but provides their own thermowell, the
U-length must be provided. Various sizes of thermowells are available
from Totalflow, but the U-length or insertion depth will be required.
The following procedure assumes a Totalflow kit was provided.
(Reference drawing 2101779-AI provided with the kit.)
1. Install thermowell into meter run and tighten.
2. Install the ½" stainless steel nipple into the thermowell and tighten.
3. Separate the union and install the female end of the union along with
its nut onto the nipple and tighten. With the RTD Head still loose,
screw the male end of the union into the bottom of the Head and
tighten.
Figure 5 (RTD Probe Assembly)
7
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