H-SEM
Operation
Instruction 3015-4584
11
3.8.3 Viewing the Faults Log
From the
Data Display
screen, press both
the
Keypad
Left
and
Right
buttons at the same time to
display the first
Function Menu
screen. Next, use the
Keypad
buttons to move the arrow (>) until it
points to the
FAULTS
function, and then press the
ENTER
button to display the
Faults
Log
screen.
The
Faults Log
screen shows the monitor’s current fault status. If the
fault is still present when the
FAULTS
function is selected, then the
current cause of the fault is displayed along with the date and time it
occurred. If the cause of the fault has been cleared, then the
Faults Log
screen will show <0000> along with the date and time the fault was
cleared. Use the
Keypad
buttons to scroll through the fault log. In the
screens shown to the left, record #03 shows that a Sample Flow Fault (fault
code <0800>) occurred on 07/11/05 at 08:17, while record #04 shows that
the fault was cleared on 07/11/05 at 9:00.
The cause of the fault is identified by a numeric fault code. To convert the
fault code into a text description of the fault, first press the
ENTER
button
and then use the
Keypad
buttons to scroll through the display until the
text description of the fault appears. If the fault code is a combination of
two or more faults, then continue to use the
Keypad
buttons until all fault
text descriptions have been displayed. For example, the fault code <1800>
represents the combination of both a Sample Flow <0800> and a Purge
Flow <1000> fault as shown to the left.
The Fault Log can be cleared as described under the heading
Clearing the
PPM Log & Faults Log
on Page 12.
3.8.4 Fault Codes
FAULT CODES ARE ADDITIVE
. For example:
A fault code of <0003> indicates that both a Box
Temperature Fault <0001> and a Bench Temper-
ature Fault <0002> have occurred.
<0001> Box Temperature Fault:
Enclosure
temperature is outside normal range (or IR detector
has failed). Check that the monitor is not being
subjected to extreme temperatures. Use the
DIAG
function to check the Box Temperature.
<0002> Bench Temperature Fault:
Optical
bench is outside normal operating range (or IR
detector has failed). Check that the monitor is not
being subjected to extreme temperatures.
<0004> Manifold Pressure Fault:
The manifold
pressure is outside its normal operating range (or
IR detector has failed). Enter the
DIAG
function and
record ALL data. Call the factory with this
information for further instructions.
<0040> Fill Flow Fault:
The purge-air bag’s
pressure drop is outside expected limits. Check for
a punctured bag or disconnected tubing.
<0080> Over Range Fault:
Monitor exposed to a
gas level that exceeded 65,000 ppm.
<0100> Zero Filter Fault:
The air-purge bag is
contaminated with gas. Take monitor to a clean-air
area and use the
EMTYBAG
and
FILLBAG
functions
to decontaminate the air-purge bag.
<0200> Gain Set Fault:
The digipot autotune
sequence has failed. This fault will only occur on
first boot up or after a firmware upgrade. Call the
factory for further instructions.
<0400> A/D Fault:
A fault has occurred in the
analog-to-digital circuitry. Contact the factory with
this information for further instructions.
<0800> Sample Flow Fault:
Check for:
A restriction in the gas-sample inlet or exhaust; a
blocked internal filter; or a failed pump.
<1000> Purge Flow Fault:
Check for:
A restriction in the gas-sample exhaust; a blocked
internal filter; or a failed pump. Once the purge air
stream has been restored, the monitor will return
to normal operation after it completes a purge
cycle.
<2000> Bag Fill Fault:
The purge-air bag did not
fill within the expected time allotment. Check for a
punctured bag or disconnected tubing.
<4000> Zero Range Fault:
The IR detector’s
output voltage is out of tolerance. Enter the
DIAG
function and record all data. Call the factory with
this information for further instructions.
<8000> Clipping Fault:
The detector voltage may
be out of tolerance. Use the
DIAG
function to check
the IR detector voltage. Call the factory with this
information for further instructions.
FAULT CODE<1800>
12 SAMPLE FLOW
FAULT CODE<1800>
13 PURGE FLOW
#03 <0800> @
07/11/05 08:17
#04 <0000> @
07/11/05 09:00
