SC-04
Chapter 2: Description • 11
Filters
NO
2
and SO
2
Sensors’ H
2
S Removal Filter Disk (Tan)
An H
2
S removal filter disk is placed into a recess in the sensor gasket over the NO
2
or SO
2
sensor. The filter disk prolongs the life of the sensors by preventing H
2
S in the ambient air
from reaching the sensor. The filter should be replaced every 6 months.
HCN Sensor H
2
S Removal Filter Disk (Dark Gray)
An H
2
S removal filter disk is placed into a recess in the sensor gasket over the HCN sensor.
The filter disk prolongs the life of the sensors by preventing H
2
S in the ambient air from
reaching the sensor. The filter should be replaced every 6 months.
PH
3
Sensor Humidity Filter (White)
A white humidity filter is placed into a recess in the sensor gasket over the PH
3
sensor. The
filter absorbs humidity in the sampling environment to prevent unstable readings around 0
ppm. The filter should be replaced every 6 months.
NH
3
Sensor’s Humidity Filter (White)
A white humidity filter is placed into a recess in the filter gasket over the NH
3
sensor. The
filter absorbs humidity in the sampling environment to prevent unstable readings around 0
ppm. The filter should be replaced every 6 months.
Hydrophobic Filter
The white, circular hydrophobic filter fits into a recessed area in the front case and is held in
place by the sensor gasket. It prevents water and particulates from entering the instrument.
Infrared Communications Port
An infrared (IR) communications port is located at the top of the instrument, near the LED.
Logged data transmits through the port in standard IrDA protocol. A computer’s infrared port
or an IrDA/USB cable connected to a USB port can be used to download data to the 04 Series
Datalogging Program. See the 04 Series Datalogging Program operator’s manual for data
logging and downloading instructions.
Batteries
2 AAA batteries (alkaline or Ni-MH) power the SC-04. At 25°C alkaline batteries will last at
least 3,000 hours (125 days) and Ni-MH batteries will last at least 2,000 hours (83 days). The
battery icon in the upper right of the LCD shows remaining battery life.
A low battery warning activates when the SC-04 detects a low battery voltage. The SC-04
sounds a dead battery alarm when battery voltage is too low for Measuring Mode.
WARNING:
Use only Duracell MN2400 or PC2400 or Eneloop BK-4MCC batteries to
maintain the QPS classification of the SC-04. Use of other batteries will
void the QPS classification and may void the warranty. Do not mix old/new
or different types of batteries.
AVERTISSEMENT:Utiliser uniquement des piles Duracell MN 2400 ou PC 2400 ou
Eneloop BK-4MCC de maintenir la classification QPS de la SC-04.
L’utilisation d’autres piles annule la classification QPS et peut annuler la
garantie. Ne mélangez pas les anciennes/nouvelles ou différents types de
piles.