Transmitter Vent (Series) Connection; Vacuum Application Connection - GE DewPro MMY 245 Installation And Operation Manual

DewPro MMY245 Installation and Operation Manual

4.3.1 Transmitter Vent (series) Connection

This is most popular connection (see Figure 8) since the port is built into the exhaust port of the on-line
transmitter. The connection is made to the outlet port using a ¼" NPT-M to ¼" tube compression fitting
threaded into the exhaust port of the transmitter. This fitting can be connected to the MMY 245 using the
hose and fitting connector accessory.
Figure 8
Although the MMY 245 can operate at inlet pressures of up to 150 psig, the MMY 30 transmitter is
frequently fitted with an orifice either at the inlet or outlet that will drop the pressure. For convenience, the
MMY 245 can be set to correct for this pressure differential and produce the proper validation. If the orifice
is at the outlet as in a model MMY 30R1A1A, the setting for the pressure compensation in the MMY 245
must be set for proper pressure compensation. In this case, the sample pressure at the transmitter should be
measured and noted for proper configuration of the validator. If the orifice is at the inlet as in M/N MMY
30R1B1A, the setting for the pressure compensation in the MMY 245 must be set to 1 bar.
Once the sample connection has been made, the unit should be allowed to purge for at least 10 minutes to
provide a true sample to the validator. After purging the system, the selected calibration may proceed by
setting the MMY 245 to begin the validation.

4.3.2 Vacuum Application Connection

Caution: This connection must be performed with caution since the process must be opened
temporarily to the atmosphere in order to connect the MMY 245. Release the vacuum gradually
before making the process connection to the MMY 245.
GE General Eastern
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