Martel Electronics EL-USB-CO - Manual (Page 2)

LED FLASHING MODES
AUDIBLE WARNING
EL-USB-CO features a red and a green LED.
The LEDs on an EL-USB-CO will flash in one of the following ways, assuming latching of the warning threshold has
been turned off in the EL-WIN-USB control software.
The audible warning will sound once per second when the warning threshold has been exceeded. To disable the warning ,
remove the cap from the front of the data logger.
The audible warning will sound once every 60 seconds when there is a low battery condition. This indicates that the battery
must be replaced.
By default latching is disabled. The red LED will not flash after the logged voltage has returned to normal. Instead, the green LED
will flash.
Latching can be turned on via the control software. The red LED will then continue to flash, even after the logged CO value has
returned to normal. The red LED will effectively have latched into its warning condition. This feature ensures that the user is
notified that the warning threshold has been exceeded, without the need to download the data from the logger.
- Green single flash, Logger primed and ready to start.
every 30 seconds
- Green single flash, Logging in progress, last stored value OK
every 10 seconds
- Red single flash, Logging in progress, the last stored reading is equal to or the warning threshold
every 10 seconds (If latching is turned on, then a stored value is equal to or exceeds the warning threshold)
(will flash once every second when audible warning is enabled)
- Green single flash, Low battery, logging in progress, the last stored value OK
every 20 seconds
- Green double flash, Logger is full, last stored value OK
every 20 seconds
- Red/Green single flash, Logger is full, last stored value is equal to or exceeds the warning threshold
every 20 seconds, (will flash once every second when audible warning is enabled)
alarm latching turned on
- No LEDs flash Battery inserted, but no logging exercise started
or
Battery dead.
exceeds
EL-USB-CO
Carbon Monoxide (CO) Data Logger with USB Interface
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SPECIFICATIONS
Specification Min. Typ. Max. Unit
Measurement range 0 1000 ppm CO
Internal resolution 0.5 ppm CO
Accuracy (error) 6 % of reading
Repeatability 2 % of reading
Decay of reading over time 5 % of reading / year
Response time (to reach 90%) 1 minute
Logging rate every 10s every 12hr -
Operating temperature range (15-90 %RH, non-condensing) -10 (14) +40 (104) °C (°F)
Operating pressure range 900 1100 mbar
1/2AA 3.6V Lithium Battery Life* 3 month
+
+
* with battery supplied, 10 minute logging rate, 25°C ambient temperature, audible warning disabled, reading <10 ppm CO
Specifications liable to change without prior warning EL-USB-CO Issue 2 April/2006 M.C. Applies to EL-USB-CO/2
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com