HS-04 Operator’s Manual Appendix A: Maintenance Mode • 81
Appendix A: Maintenance Mode
Overview
This appendix describes the HS-04 in Maintenance Mode. The HS-04 is factory-set to suit most
applications. Update settings in Maintenance Mode only if required for your specific application.
Maintenance Mode items and their factory settings are listed in Table 13 below.
Table 13: Maintenance Mode Menu Items
Maintenance Mode
Menu Item
Description
GAS CAL (page 84) Perform an air adjust, perform a span adjustment, change the calibration values.
AIR Perform a fresh air adjustment.
A-CAL or
E-CAL
depending on
E-CAL User
Mode setting
Perform a span adjustment and set the calibration gas concentra-
tion.
A-CAL (or
E-CAL)
Perform an automatic span adjustment.
START Begin the warmup sequence and enter Measuring
Mode.
CAL-P Set the calibration gas concentration.
ESCAPE Return to the A-CAL item in the GAS CAL menu.
ESCAPE Return to the GAS CAL item in Maintenance Mode.
GAS.TEST (page 84) Apply gas to test sensor response and observe alarm indicators without an alarm
event being recorded.
SEN.DATE (page 85) View and/or set the replacement date for the sensor and the batteries.
BUMP (page 86) Perform a bump test.
LATCH (page 86) ON
(factory setting): The HS-04 remains in alarm until the alarm condition passes
and POWER MODE is pressed.
OFF
: The HS-04 automatically resets an alarm when the alarm condition passes.
D.ZERO (page 87) ON
(factory setting): You can manually perform a fresh air adjust in Measuring
Mode by pressing AIR.
OFF
: You cannot manually perform a fresh air adjust in Measuring Mode by
pressing AIR.
A.ZERO (page 87) ON
: The HS-04 asks if you want to perform a fresh air adjustment at the end of the
startup sequence.
OFF
(factory setting): The HS-04 does not ask if you want to perform a fresh air
adjustment at the end of the startup sequence.
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