78 • Appendix A: Maintenance Mode
04 Series for CO(-H2)
Entering Maintenance Mode
WARNING:
The CO-04C is not in operation as a gas detector while in Maintenance
Mode.
1. Take the CO-04C 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 (pg.83)
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
(pg.83)
ON
(factory setting): Not intended for field adjustment. The suppression value is 2 ppm.
ZERO.FLW
(pg.83)
ON
(factory setting): Not intended for field adjustment.
ZSUP.DSP (pg.84)
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
(pg.84)
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 (pg.84)
ON
(factory setting):
CYL SEL
item appears in
GAS CAL
.
OFF
:
CYL SEL
item does not appear in
GAS CAL
.
(RKI Instruments, Inc. does not recommend adjusting this setting.)
DATE (pg.84)
Set the current date and time.
PASS-W (pg.85)
ON
(factory setting): Maintenance Mode is password-protected. Factory-set password is
0400
.
OFF
: Maintenance Mode is not password-protected.
ROM/SUM
(pg.86)
View the firmware information for the CO-04C’s sensor board and main board.
Set all parameters back to their RKI factory settings.
START (pg.87)
Press and release POWER MODE to begin the warmup sequence and enter Measuring
Mode.
Table 14: Maintenance Mode Menu Items
Maintenance
Mode
Menu Item
Description