Emerson CSI 9420, Reference Manual

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2.1.9 Minimize power consumption
The primary way to minimize power consumption is to reduce the publish rate.
Two other configuration settings that affect power consumption are:
• LCD (Liquid Crystal Display)
• PowerSave mode
LCD
Disable the LCD after installation is complete if it is not required during normal operation.
It is neither necessary nor sufficient to physically remove the LCD; it must be disabled
through configuration in order to save power. From AMS Device Manager, select the
wireless network where the transmitter is connected, right-click the transmitter and select
Configure > Manual Setup > General Settings tab > LCD Mode > Off .
Note
Disabling the LCD (not removing it, just disabling it) through configuration provides power savings of
about 15–20%.
Leave the LCD installed even if it is disabled to provide valuable diagnostic information. To
view the LCD, remove the front cover and press the
DIAG button. This wakes the device and
displays current information. This can be beneficial for taking a quick reading and to aid in
troubleshooting.
CAUTION!
The front electronics end cap (the cap covering the LCD) is certified for Class I, Division I in
appropriate gas environments (check the nameplate on the device for details).
Exposing the electronics to a production environment can allow particulates, moisture, and
other airborne chemicals to enter into the device, which could lead to contamination and
potential product performance issues. In all cases, whenever opening the front end cap, be
sure to seal it completely afterwards by tightening until the black O-ring is no longer visible.
For an illustration on how to properly seal the end cap, see
Figure 3-12 .
PowerSave mode
PowerSave mode is available in CSI 9420 devices that are Rev. 3 or later and it enables the
device to make measurements less frequently, thereby conserving power. This is ideal
when either power module life is more critical than the acquisition rate or when changes in
vibration are only expected to occur over extended periods of time.
You can configure the settings for the PowerSave mode in AMS Machinery Manager (MHM
Access Control must first be enabled) and in AMS Device Manager. The specific field is
referred to as PowerSave Skip Multiplier. It is the number of times the transmitter skips
data acquisitions between updates to the gateway.
At any point, the effective acquisition rate for the CSI 9420 is defined as:
Effective Acquisition Rate = (Update Rate) x (PowerSave Skip Multiplier)
Configuration
MHM-97408, Rev 15 17