CO-Guard
ENMET
Manual Release Date – June 8, 2017
P a g e
| 11
Manual Part No. – 80002-044
5.0 Maintenance
The
CO-G
UARD
maintenance menus that are accessed by pressing the
M
ENU
button and entering a valid access code. The access
code is set at the factory and may be changed by following the access code menu explained in section 5.5.
5.1 Maintenance Menus
C
AUTION
:
Do Not Attempt a Span Procedure Without Calibration Gas Applied to The Sensor
; if this is done, the instrument is
forced into a calibration fault mode.
Pushbutton switches control the
M
ENU
and
S
ELECT
functions. The
M
ENU
and
S
ELECT
button locations are indicated on the
display panel, see
Figure 3.
The
M
ENU
button is used to display the various menu options and make incremental changes to
numbers such as alarm points, calibrations gas, etc. The
S
ELECT
button is used to select that option, set zero or span digit.
To enter the maintenance menu, press and hold the
M
ENU
button for 2 to 4 seconds
Table 3
indicates the maintenance menu sequence see
Figure 6
for a detailed maintenance menu flow chart.
Table 3: CO-G
UARD
Maintenance Menus Sequence
Example of Display
Function
Normal Display Mode
Measurement of CO
Press and
hold
the
M
ENU
button for 2 – 4 seconds to enter the Maintenance Menu
The Power/Fault LED will flash Green – Red to indicate the
CO-G
UARD
is in Maintenance Mode
To exit the maintenance Menu and return to the
Normal Display Mode:
If intended function Press
S
ELECT
button
Press the
M
ENU
button to advance to the Zero procedure
For adjusting Zero:
If intended function Press
S
ELECT
button
Press the
M
ENU
button to advance to the Span procedure
For adjusting the Span:
If intended function Press
S
ELECT
button
Press the
M
ENU
button to advance to each Alarm set point procedures
For adjusting the Alarm 1, 2 and 3 set points:
If Intended Function Press
S
ELECT
button
Press the
M
ENU
button to advance the mA Span set point procedure
For adjusting the mA Span set point:
If intended function Press
S
ELECT
button
Pressing the
M
ENU
button without pressing the
S
ELECT
button will allow you to cycle through the menu options.
You must Press the
S
ELECT
button to initiate the desired operation.
5ppm
Exit
Zero
Span
mA Span
Alarm1
Alarm2
Alarm3