82 • Appendix A: Maintenance Mode HS-04 Operator’s Manual
Entering Maintenance Mode
WARNING: The HS-04 is not in operation as a gas detector while in Maintenance Mode.
1. Take the HS-04 to a non-hazardous location and turn it off if it is on.
2. Press and hold AIR, then press and hold POWER MODE. You will hear a beep after one
second. Continue to hold the buttons down.
3. When you hear a second beep, release the buttons.
ID DISP (page 88) ON: User ID and Station ID screens appear in startup sequence. IDs can be
changed in Display Mode if DISP.SET in User Mode is also set to ON.
OFF
(factory setting): User ID and Station ID screens do not appear in startup
sequence. IDs cannot be changed in Display Mode.
ZERO.SUP (page 88) ON
(factory setting): Not intended for field adjustment. The suppression value is
0.3 ppm.
ZERO.FLW (page 88) ON
(factory setting): Not intended for field adjustment.
ZSUP.DSP (page 88) ON
: Zero suppression item appears in User Mode.
OFF
(factory setting): Zero suppression item does not appear in User Mode.
(Zero suppression item is always available in Maintenance Mode)
ZFLW.DSP (page 89) ON
: Zero follower item appears in User Mode.
OFF
(factory setting): Zero follower item does not appear in User Mode.
(Zero follower item is always available in Maintenance Mode)
CYL.DISP (page 89) ON
: CYL SEL item appears in GAS CAL.
OFF
(factory setting): CYL SEL item does not appear in GAS CAL.
(RKI Instruments, Inc. does not recommend adjusting this setting.)
DATE (page 89) Set the current date and time.
PASS-W (page 90) ON
(factory setting): Maintenance Mode is password-protected. Factory-set pass-
word is 0400.
OFF
: Maintenance Mode is not password-protected.
ROM/SUM (page 91) View the firmware information for the HS-04’s sensor board and main board.
M.DEF (page 91) Set all parameters back to their RKI factory settings.
START (page 92) Press and release POWER MODE to begin the warmup sequence and enter Mea-
suring Mode.
Table 13: Maintenance Mode Menu Items
Maintenance Mode
Menu Item
Description
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