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Zero Adjust
Pressing Zero Adjust button will bring up a “Is zero pressure
applied?” message. If yes, press OK. If the zero measure-
ment is within 10% of the factory zero measurement stored
in the unit, the zero value will be reset. Note: Zero Adjust
should only be performed after the unit has been operating
for 30 minutes in the installed location.
Span Adjust
This requires the use of a Pressure Calibrator, such as a Setra
Model 869 or equivalent. Connect tubing from the Cali-
brator to the low and high ports identied near the PCBA
markings. Apply Full Range pressure, for example ± 0.1”
WC range, use 0.1” WC. When pressure reaches Full Range
pressure, press OK button. The output at Full Range must be
within 10% of the factory calibration to allow re-adjustment.
Restore Factory User
Zero and User Span
If the unit has been miscalibrated in the eld, the factory
zero and span settings can be restored.
Test
The Buzzer, Relay and Internal Memory checksum can be
tested and veried.
The System Information screen reports Model Number, Serial Number,
Firmware Revision, Network Status, Last (Factory) Calibration Date and
Technical Support Contact.
Technical Support Any string 30 characters or shorter
can be entered in this eld by press-
ing anywhere in the white text entry
box to enable the pop-up keyboard.
Enter an email address, name, or
phone number as needed.
Restore Factory Default
Restores the default settings for all con-
guration and setup screens. All congured
settings, including alarm thresholds and
audible alarming, that were modied after
installation will be lost if this function is
used. Primary and Secondary Room Labels
will show “???.” Normal operation of pres-
sure measurement will not be affected.
System Information
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