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2050/2060 Gas Monitors (5/04)
1.0 PRODUCT DESCRIPTION
1.1 Introduction
The Model 2050 Ammonia and Model 2060 Refrigerant/
Halocarbon Gas Monitors are continuous duty, low cost
stationary monitors for detection of high levels (50-500
PPM) of ammonia and halocarbon ("freons") refrigerant
gases. See the specifications page for a full list of avail-
able applicable halocarbons
This manual provides instructions for both the 2050 and
2060 series Gas Monitors, including the relay versions.
1.2 Application
These monitors are primarily used in and around freez-
ers, refrigerators, and compressor rooms to warn of leaks
and dangerous levels of these gases.
1.3 Configuration
An alarm is activated when the concentration of gas
exceeds the user-adjustable level. An alarm condition
activates the alarm light on the front of the monitor and
generates an output signal. On Models 2050-00 and the
2060-00 the output signal a TTL (Transistor-Transis-
tor-Logic signal) can activate a remote alarm through
one of Sierra Monitor’s Alarm Panels. (The Model 2102
Dual Channel Alarm Panel can be connected up to 500
feet from the monitors. ) The models can be config-
ured with a 0.5 amp, dry contact relay.
The monitors are housed in a
polystyrene enclosure that is suit-
able for installation in freezer, re-
frigerator or other applications.
Test connections and adjustment
controls are located on the out-
side of the enclosure and are eas-
ily used, even when the operator
is wearing hand protection.
The Model 2050 Ammonia moni-
tor has a factory alarm setpoint of
100 ppm NH
3
. This setpoint is
user adjustible in the field over a
range of 50 to 500 ppm NH
3
. The
Model 2050 calibration can be
checked with Hydrogen gas.
The Model 2060 Halocarbon
monitor can be calibrated with
carbon monoxide and the factory
setpoint varies for the specific
type of halocarbon present. The
Model Gas TTL Relay
2050-00 Ammonia X X
2060-00 Halocarbons X X
Table 1.1 Gas Monitor Configurations
factory setpoint for R12 is 500 ppm while the setpoint
for R134 a is 50 ppm. See the specifications for more
details.
The Model 2050 / 2060 is cross sensitive to other com-
bustible gases. If combustible gasses in excess of 50
ppm are expected in the area please contact Sierra Moni-
tor to determine amount of cross-sensitivity expected
for the specific combustible gas. It is not recommended
to use this unit in areas with combustible gases present.
Figure 1.1 Outline View - 2050/2060 Series
1