Sierra Monitor Corporation 2050-00, 2050-10, 2060-00, 2060-10 User Manual
GAS MONITORS
MODELS 2050-00 & 2050-10
MODELS 2060-00 & 2060-10
Applicability & Effectivity
Sierra Monitor Corporation
1991 T arob Court, Milpit as, CA 95035
(408) 262-6611
(800) 727-4377
E-Mail: sierra@sierramonitor.com
GAS MONITORS
MODELS 2050-00 & 2050-10
MODELS 2060-00 & 2060-10
APPLICABILITY & EFFECTIVITY
This manual provides instructions for the following Sierra Monitor products:
Model Description
2050-00 Ammonia Gas Monitor
2060-00 Halocarbon Gas Monitor
The instructions are effective for the above models as of January 1, 2004
Instruction Manual Part Number: T10013
Rev C
Applicability & Effectivity
T ABLE OF CONTENTS
SECTION PAGE
1.PRODUCT DESCRIPTION 1
1.1 Introduction 1
1.2 Application 1
1.3 Configuration 1
1.4 T emperature Range 2
1.5 Sensor 2
1.6 Remote Alarm 2
2. QUICK ST ART 3
2.1 Overview 3
2.2 Wiring 3
3. OPERA TION 4
3.1 Introduction 4
3.2 Alarms 4
3.3 Outputs 4
4. ALARM CALIBRATION 5
4.1 Factory Alarm Calibration 5
4.2 Frequency of Alarm Calibration Check 5
4.3 Alarm Calibration Check Process 5
4.4 Equipment Required 6
4.5 Alarm Calibration Procedure 6
5. SERVICE
5.1 Sensor Replacement 7
6. INST ALLATION 8
6.1 Gas Sensor Module Locations 8
6.2 Mounting 8
6.3 Wiring 8
6.4 Power Supply 8
6.5 Alarm Devices 8
7. ALARM CONFIGURATION 10
8. SPECIFICA TIONS 11
9. ACCESSORIES AND REPLACEMENT P ARTS 11
10. LIMITED WARRANTY 11
Table of Contents
Instruction Manual
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 available 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 freezers, 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-Transistor-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 configured with a 0.5 amp, dry contact relay.
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 combustible gases. If combustible gasses in excess of 50
ppm are expected in the area please contact Sierra Monitor 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.
The monitors are housed in a
polystyrene enclosure that is suitable for installation in freezer, refrigerator or other applications.
Test connections and adjustment
controls are located on the outside of the enclosure and are easily used, even when the operator
is wearing hand protection.
The Model 2050 Ammonia monitor has a factory alarm setpoint of
100 ppm NH3. This setpoint is
user adjustible in the field over a
range of 50 to 500 ppm NH3. 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
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Figure 1.1 Outline View - 2050/2060 Series
2050/2060 Gas Monitors (5/04)
1.4 Temperature Range
The Model 2050 and 2060 have temperature compensated circuitry to provide stabilization in temperatures
ranging from -4o to 158oF.
However, for optimum operation the unit should be calibrated at the normal temperature expected for the sensor
location.
1.5 Semiconductor-T ype Sensor
A solid-state semiconductor-type sensor and associated electronic circuitry ensure trouble-free, long-term
operation. All the electronic circuitry needed to operate
the monitor, except the DC input power , is contained in a
compact unit. There are no pumps, filters, or chemical
cells to replace or maintain. Except for periodic calibration to verify the alarm setting, no attention is required
after installation. The user may adjust the alarm level by
applying a different calibration gas concentration.
Instruction Manual
A sensor self-check feature will flash the alarms on and
off alternatively should the sensor fail (open circuit).
The alarm flash includes LEDs, audible alarm, relay or
alarm signal as applicable.
1.6. Remote Alarm A vailable
If a remote alarm is desired, Sierra Monitor’s Alarm Panels, the Model 2102 Dual Channel Alarm Panels can be
connected up to 500 feet away from the monitors.
2050/2060 Gas Monitors (5/04)
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