MSA Chemgard User Manual

Chemgard Infrared Gas Monitor
Section 1, General Information
1-1
Table 1-1. Chemgard System
General Operating Specifications
TYPICAL PERFORMANCE SPECIFICATIONS
OPERATING
PRESSURE
ambient atmospheric
OPERATIN SPECIFICATIONS
VOLTAGE
RATING
100 to 240 VAC, 50-60 Hz
POWER
REQUIREMENTS
.88 amps at 120 VAC; 80 W, max
.54 amps at 240 VAC; 80 W, max
TROUBLE
RELAY
Normally energized, Form C contact:
240 VAC, 8 amp resistive SPDT
WARNING
RELAY
One relay, Form C contacts: 240 VAC,
8 amps resistive SPDT
CAUTION RELAY
One relay, Form C contacts: 240 VAC,
8
amps resistive SPDT
ALARM RELAY
One relay, Form C contacts: 240 VAC,
8
amps resistive SPDT
ANALOG
OUTPUTS
4 to 20 mA sourcing, 1,000 ohm load,
0-10 V, 2 K ohm load
MAXIMUM
OUTPUT
SIGNAL LOAD
FOR 4-20 MA
OUTPUT
1000 ohms (includes wiring)
AUDIO ALARM
DRIVE OUTPUT
10 VDC 20-ohm load maximum
(available only with non-beacon models)
SAMPLE
TUBING
CONNECTIONS
1/4"
(6.35 mm) OD
DIMENSIONS
18" high, 16" wide, 7" deep
457.2 mm high, 406.4 mm wide,
177.8 mm deep
WEIGHT OF
Chemgard WITH
SEQUENCER
45 pounds (20 k
ilograms)
TRANSPORT AND STORAGE CONDITIONS
TEMPERATURE
-55
o
C to +70
o
C (-67
o
F to 158
o
F)
HUMIDITY
99% RH non-condensing
Table 1-1. Chemgard System
General Operating Specifications
TYPICAL PERFORMANCE SPECIFICATIONS
STABILITY
0-5% full-scale (FS); +0.2% FS
5%-100% FS; +10% of reading
SHORT TERM
NOISE
+0.2% FS peak over a 10-minute peri
od
LINEARITY
0-5% FS; +0.2% FS
5-100% FS, +10% of reading
WARM-UP TIME
(READY)
24 hours maximum; typical, 20 minutes at
22°C (70 F) ambient
RESPONSE TIME
90% of a step-change in 70 seconds
TRANSPORT
TIME
500 FT (152 M)
OF SAMPLING
TUBING
LENGTH
13 minutes for a 90%
step change
150 FT (46 M)
OF SAMPLING
TUBING
LENGTH
105 seconds for a
90% step change
OPERATING
TEMPERATURES
0
o
C to 50
o
C (32
o
F to 122
o
F)
TEMPERATURE
EFFECT
+0.3%/
o
C of reading, 0 to 35
o
C based on
temperature at calibration
+0.6%/
o
C of reading, 0 to 35 to 50
o
C
based on temperature at calibration
RELATIVE
HUMIDITY
0 to 95%, RH non-condensin
g
SAMPLE FLOW
RATE
.75 liter per minute - minimum with
maximum tubing length;
typically 1.2 to 1.5 liters per minute with
no tubing
MAXIMUM
SAMPLE OR
EXHAUST
TUBING LENGTH
150 feet (46 m) with 1/8" (3.18 mm)
ID tubing, 1/4" (6.35 mm) OD
(total of Inlet & Outlet);
500 feet (152 m) with 0.18" (4.57 mm) ID
tubing
Section 1
General Information
Introduction
This manual provides instructions for the:
• Chemgard Monitor
• Chemgard unit with Multipoint Sequencer.
The
se instruments can provide continuous gas
monitoring (see TABLE 1-1 for
Operating Specifications).
NOTE: The
se units have not been evaluated for
performance by UL.
For the C
hemgard Remote Relay* option, see
Appendix B, "Relay Module."
*This un
it has not been evaluated by Underwriters
Laboratories, Inc.

MSA Chemgard Specifications

General

Brand	MSA
Model	Chemgard
Category	Measuring Instruments
Language	English