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Instruction Manual MM850481 ed.01
7.10 Ambient CO probe
(option)
This optional external probe allows ambient CO monitoring for personnel safety. When connected to the analyzer, it
monitor continuously CO concentration and it signal when the Long-term Exposure (TWA) limits are reached. An
acoustic and visible signals are emitted by unit.
The following page show the current exposure limits for CO gas. This table is a guidance only, and figures must be
checked before being used. Sensors used in safety applications should be fully calibrated at least every six months.
U.K.
HSE
GERMANY
DFG
USA
OSHA
TWA (8h)
50 30 35
STEL (10’)
300 60 (30) 200
7.10.1 CO probe operations
To enable CO monitoring press the [MENU] key from measuring page. The following page will be displayed:
MENU
MEASURE
RECALL MEMORY
FLOW/RETURN TEMP
AMBIENT ANALYSIS
ESCAPE
–
Use the [S] and [T] keys to move the cursor symbol to “MEASURE” option.
Press the [ENTER] key to select the option. Press [ESCAPE] (F2) to return to the previous menu.
MEASURE
P DECAY LEAK TEST
GAS LEAK TEST
AMBIENT CO
ENVIRON. TEMP/HUM
ESCAPE
–
Use the [S] and [T] keys to move the cursor symbol to “AMBIENT CO” option.
Press the [ENTER] key to select the option. Press [ESCAPE] (F2) to return to the previous menu.
Connect the probe to the unit and wait for the following page:
AMBIENT CO
Amb. CO: 7 ppm
ESCAPE
–
ZERO
NOTE: W
HEN PROBE IS CONNECTED THE INSTRUMENT BEGIN A
40
SECONDS WAITING TIME
. I
F PROBE IS CONNECTED IN
A
MBIENT
CO
MENU
,
A WAITING MESSAGE WILL BE DISPLAYED
.
Before insert the probe in working area, agitate it for same seconds in fresh and uncontaminated air. Press the [ZERO]
key to reset the measure and start CO monitoring.
From this moment the unit will compare the monitored value with the CO limit (default OSHA limit: 35ppm). It is possible
to change the CO limit using the GasConfig software for PC.
Press [ESCAPE] (F2) to return to the previous menu.
NOTE: I
F THE PROCEDURE ABOVE IS EXECUTED AND THE
CO
PROBE REMAIN CONNECTED
,
THE INSTRUMENT WILL MONITOR AMBIENT
CO
ALSO DURING OTHER OPERATIVE MODE
.
If alarm condition is marked, press the [ENTER] key to silence it.
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