4. Move the HART security switch to the OFF position (up).
The HART security switch is the switch on the left.
5. Replace the safety spacer and end-cap.
6. Power up the meter.
4.4 Set the HART lock
If you plan to use a HART connection to configure the device, you can lock out all other HART masters. If you
do this, other HART masters will be able to read data from the device but will not be able to write data to the
device.
Restriction
HART lock is only available:
• When you are using a field communicator or AMS
• With a HART 7 host
Procedure
1. Choose Configure → Manual Setup → Security → Lock/Unlock Device.
2. If you are locking the meter, set Lock Option as desired.
Option
Description
Permanent Only the current HART master can make changes to the device. The device will remain
locked until manually unlocked by a HART master. The HART master can also change
Lock Option to Temporary.
Temporary Only the current HART master can make changes to the device. The device will remain
locked until manually unlocked by a HART master, or a power-cycle or device reset is
performed. The HART master can also change Lock Option to Permanent.
Lock All No HART masters are allowed to make changes to the configuration. Before changing
Lock Option to Permanent or Temporary, the device must be unlocked. Any HART
master can be used to unlock the device.
Postrequisites
To avoid future confusion or difficulties, ensure that the device is unlocked after you have completed your
tasks.
4.5 Restore the factory configuration
The SGM is a field-configured device. Therefore, attempts to restore the factory configuration will result in an
error since no factory configuration is loaded into the SGM electronics.
Introduction to configuration and commissioning Configuration and Use Manual
March 2021 MMI-20020954
26 Micro Motion Gas Specific Gravity Meters (SGM)
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