MSA GASGARD 8 User manual

GASGARD®8 Monitor
instruction manual
In the U.S., to contact your nearest stocking location, dial toll-free 1-800-MSA-INST.
To contact MSA International, dial 1-412-967-3354.
© MINE SAFETY APPLIANCES COMPANY 2005- All Rights Reserved
Distributed by
MSA INSTRUMENT DIVISION
P.O. Box 427, Pittsburgh, Pennsylvania 15230
(L) Rev 4 10029332

"WARNING
THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO
HAVE OR WILL HAVE THE RESPONSIBILITY FOR USING OR SERVICING THE
PRODUCT. Like any piece of complex equipment, the unit will perform as
designed only if it is installed, used and serviced in accordance with the
manufacturer’s instructions. OTHERWISE IT COULD FAIL TO PERFORM AS
DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT FOR THEIR
SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR DEATH.
The warranties made by Mine Safety Appliances Company with respect to the
product are voided if the product is not used and serviced in accordance with
the instructions in this manual. Please protect yourself and others by following
them. We encourage our customers to write or call regarding this equipment
prior to use or for any additional information relative to use or repairs.

MSA Permanent Instrument Warranty
1. Warranty- Seller warrants that this product will be free from
mechanical defect or faulty workmanship for a period of
eighteen (18) months from date of shipment or one (1)
year from installation, whichever occurs first, provided it is
maintained and used in accordance with Seller’s
instructions and/or recommendations. This warranty does
not apply to expendable or consumable parts whose
normal life expectancy is less than one (1) year such as,
but not limited to, non-rechargeable batteries, sensor
elements, filter, lamps, fuses etc. The Seller shall be
released from all obligations under this warranty in the
event repairs or modifications are made by persons other
than its own or authorized service personnel or if the
warranty claim results from physical abuse or misuse of
the product. No agent, employee or representative of the
Seller has any authority to bind the Seller to any
affirmation, representation or warranty concerning the
goods sold under this contract. Seller makes no warranty
concerning components or accessories not manufactured
by the Seller, but will pass on to the Purchaser all
warranties of manufacturers of such components. THIS
WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESSED, IMPLIED OR
STATUTORY, AND IS STRICTLY LIMITED TO THE
TERMS HEREOF. SELLER SPECIFICALLY DISCLAIMS
ANY WARRANTY OF MERCHANTABILITY OR OF
FITNESS FOR A PARTICULAR PURPOSE.
2. Exclusive Remedy- It is expressly agreed that Purchaser’s
sole and exclusive remedy for breach of the above
warranty, for any tortious conduct of Seller, or for any
other cause of action, shall be the repair and/or
replacement at Seller’s option, of any equipment or parts
thereof, which after examination by Seller is proven to be
defective. Replacement equipment and/or parts will be
provided at no cost to Purchaser, F.O.B. Seller’s Plant.
Failure of Seller to successfully repair any nonconforming
product shall not cause the remedy established hereby to
fail of its essential purpose.
3. Exclusion of Consequential Damage- Purchaser
specifically understands and agrees that under no
circumstances will seller be liable to purchaser for
economic, special, incidental or consequential damages
or losses of any kind whatsoever, including but not limited
to, loss of anticipated profits and any other loss caused by
reason of nonoperation of the goods. This exclusion is
applicable to claims for breach of warranty, tortious
conduct or any other cause of action against seller.

Table of contents
Section 1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-1. Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Table 1-1. Gasgard 8 Gas Monitor General Specifications . . . . . . . . 1-3
Chapter 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Mounting the Gasgard 8 Gas Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
"CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
AC Power Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
"!CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Figure 2-1. AC Power Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . 2-2
Optional DC Power Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Figure 2-2. Optional DC Power Wiring Connection. . . . . . . . . . . . . . . . 2-3
Sensor Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
"CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figure 2-3. Signal Input Wiring Connection . . . . . . . . . . . . . . . . . . . . . 2-4
Relay Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Figure 2-4. Jumper Settings for Relay Configurations . . . . . . . . . . . . . 2-5
4-20 mA Output Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Figure 2-5. 4-20 mA Output Wiring Connection . . . . . . . . . . . . . . . . . . 2-6
Remote Device Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Serial Link Module Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Figure 2-6. Remote Device Wiring Connection . . . . . . . . . . . . . . . . . . 2-7
Figure 2-7. RS-232 Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Table of Contents
TOC-1

Figure 2-8. RS-485 Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Chapter 3
Start-up and Operation . . . . . . . . . . . . . . . . . . . . . . 3-1
RS-485 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-1. Channel Card Register Addresses . . . . . . . . . . . . . . . . . . 3-1
Table 3-2. Alarm State Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Internal Buttons and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
To Access Factory <FACT> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure 3-1. Front Panel Buttons and Features . . . . . . . . . . . . . . . . . . . 3-2
To Access the Configuration <Conf> Mode: . . . . . . . . . . . . . . . . . . . . . . . 3-3
To Access the Channel <CHan> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
To Access the Copy <COPy> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-2. Factory Mode Programming Flowchart . . . . . . . . . . . . . . . 3-4
To Access the Sensor <SEnS> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
To Access the Unit <UNit> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
To Access the Range <rAnG> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
To Access the Alarm <AL> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
To Access the Buzzer <bUZ> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
To Access the External Fault <EFLt> Mode: . . . . . . . . . . . . . . . . . . . . . . 3-7
To Access the Date <dAtE> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
To Access the Time <tiME> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
To Access the Day <dAy> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
To Access the Year <yEAr> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
To Access the Code <CodE> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
To Access the Password Reset <1 c2> Mode: . . . . . . . . . . . . . . . . . . . . . 3-9
To Access the Connection Series <nisc> Mode: . . . . . . . . . . . . . . . . . . . 3-9
To Access the RS Output <rs> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
To Access the Printer <INp> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
To Access the JBUS <JbuS> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
To Access the Rate <rAtE> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
To Access the List <LISt> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
To Exit the Factory <FACT> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
To Access User <USEr> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Table of Contents
TOC-2

To Access the % LEL OVERRANGE <WArn> Reset: . . . . . . . . . . . . . . . 3-11
To Access the Configuration <ConF> Mode: . . . . . . . . . . . . . . . . . . . . . . 3-11
Figure 3-3. User Mode Programming Flowchart . . . . . . . . . . . . . . . . 3-12
To Access the Channel Inhibit <Inh> Mode: . . . . . . . . . . . . . . . . . . . . . . 3-13
To Access the Alarm <AL> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
To Access the Buzzer <bUZ> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
To Access the External Fault <EFLt> Mode: . . . . . . . . . . . . . . . . . . . . . . 3-14
To Access the Date <dAtE> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
To Access the Code <CodE> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
To Access the List <LISt> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
To Exit User <USEr> Mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Performing a Lamp Test: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Performing a Configuration Review: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Table 3-3. Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Table of Contents
TOC-3

Section 1
General Information
Introduction
The Gasgard 8 Gas Monitor is designed for remote monitoring of
up to eight input sensors (two or three-wire 4-20 mA). Calibration
of the sensor is performed at the sensor location and does not
require calibration adjustments at the monitor, reducing the
personnel required for calibration.
The Gasgard 8 Monitor offers many features and options,
available through easy-to-program software. These features and
options are accessed through the front panel control buttons.
Features
The Gasgard 8 Monitor is designed with easy-to-program
software, allowing the user to set:
•Full-scale range for the connected 4-20 mA sensor
•Alarm level setpoints for each of the four alarm levels
•Alarm on an upscale or downscale gas reading
•Relays as energized or de-energized
•Alarms as latching or non-latching
•Buzzer output as enabled or disabled
•External alarm reset switch or flow failure fault status
•Time and Date.
These software settings are stored in memory and, due to an
internal battery, remain preserved even with a loss of power.
In addition, the alarm and fault relays are jumper configurable as
normally-opened or normally-closed. The Gasgard 8 Gas Monitor
control and indicator features are shown in FIGURE 1-1.
Chapter 1, General Information
1-1

Front Panel Features
Display - Four digit, 1/2-inch readout indicates remote sensor
gas concentration readings.
Power-On - Green LED indicates unit is powered ON.
Alarms (AL1 through AL4) - Four red LEDs indicate when gas
concentrations exceed alarm level setpoints. Each of the four
alarm levels has individual relay outputs.
Fault - Orange LED indicates all fault conditions within the
monitor. The fault indicator has an individual relay output.
Gas Measure Range LEDs - Green LED indicates measuring
range for each channel. Software-selectable as ppm, % LEL, and
% volume.
Four Common Alarm and Fault LEDs - Common LEDs
energized when any channel alarm or system fault condition
occurs.
Figure 1-1. Front Panel
Chapter 1, General Information
1-2

Alarm Acknowledge Button (Ack) - Acknowledges alarm and
fault conditions and silences buzzer.
Test Button - Inhibits monitor gas reading capability in order to
indicate all software settings on the display, including:
•Alarm level setpoints
•Upscale/downscale setting
•Energized/de-energized status
•Latching/non-latching setting
•Buzzer status.
Sensor ID Tag Area - Use this area to identify the sensor type
connected to the Gasgard 8 Monitor.
Table 1-1. Gasgard 8 Gas Monitor General Specifications
ELECTRICAL CHARACTERISTICS
POWER SUPPLY AC Voltage 100 - 240 VAC, 47 - 63 Hz
DC Voltage 24 VDC
SENSOR
CAPACITY Up to eight sensors
SENSOR INPUT 4-20 mA;
three-wire or two-wire loop powered
READ-OUT Four-digit LED display (1/2" digits)
SETPOINTS Alarm Level Four alarm set points (AL1, AL2, AL3,
AL4) with indicating LEDs
Full-scale Range Variable .1 to 99.9 or 999
RELAYS
Alarm Four programmable
Fault One common
External One common
Status All have one LED to indicate coil
voltage
Terminals #12 gauge maximum wire size
Contacts Single-pole, double-throw, 2 amps,
250 VAC, 3 amps, 30 VDC
AUDIBLE ALARM Piezo Electric
Horn Approximately 75 decibels
OPERATING
RANGE Relative Humidity 15 to 90% non-condensing
Temperature
Range Operating 0 oC to 50 oC
Storage -20 oC to +70 oC
PHYSICAL CHARACTERISTICS
ENCLOSURE
NEMA 4 Wall Mount, not suitable for use in hazardous
locations
Dimensions 10.5" (H) x 17.75" (W) x 5" (D)
(265 x 445 x 140 mm)
Case Weight 15.5 lbs.
APPROVALS CE, European Standards EN 50081-2-1993 / EN
50082-2-1995, CEM 89/336/CEE, LVD 73/23 amended by
93/68/CEE
Chapter 1, General Information
1-3

Chapter 2
Installation
Mounting the Gasgard 8 Gas Monitor
1. Choose a mounting location that is in a clean and accessible
area, and as free as possible from shock, vibration, physical
damage and water. The housing is a general-purpose
enclosure and is not suitable for hazardous locations.
"CAUTION
Make sure the Gasgard 8 Monitor unit is not blocked;
otherwise front panel lights and controls will be obscured
from view.
2. Using four 1/4 or 20 mm mounting screws, mount the
Gasgard 8 Monitor to a wall or suitable structure.
Wiring Connections
Perform all wiring connections and conduit runs in accordance to
accepted commercial wiring practices. Install your monitor in
compliance with the applicable requirements of the National
Electric Code and/or any other local code requirements.
"WARNING
When wiring the unit, disconnect the main power; failure
to do so can result in serious personal injury or death.
AC Power Wiring Connection
The Gasgard 8 Monitor does not include a power ON/OFF
switch;
if local power OFF is required, a convenient disconnect should
be installed.
1. Route the power, ground and signal wiring through the
electrical entry hole in the enclosure.
•Power and ground wiring should be separated from
signal wiring.
Chapter 2, Installation
2-1

2. To connect the Gasgard 8 Monitor to the power source,
connect AC, ACN and GND terminals of the AC connector to
the power source in accordance with FIGURE 2-1.
"!CAUTION
Improper application of the primary power to the system
may cause damage to the unit. If unsure of the available
power, contact your local power utility for clarification.
Verify that the unit’s power is rated for the proper AC supply
line (See Table 1-1, "Gasgard 8 General Specifications").
Figure 2-1.
AC Power Wiring Connection
Chapter 2, Installation
2-2

Optional DC Power Wiring Connection
1. Prior to wiring the DC Power Supply, disconnect the two wires
from the AC Power Supply from Terminal IN OV and +ALIM,
located on the inside front panel.
2. Connect the two wires from the external 24 VDC Power Supply
to the same terminal IN OV (negative) and +ALIM
(+24 VDC). See FIGURE 2-2.
Figure 2-2.
Optional DC Power Wiring Connection
NOTE: REP BUZZER represents Report Buzzer and provides a
common alarm relay output (250 VAC, 5 amps)
Chapter 2, Installation
2-3

Sensor Wiring Connection
The Gasgard 8 Monitor is capable of taking a two-wire or
three-wire loop 4-20 mA sensor. Refer to the sensor manual to
determine:
•Optimal sensor placement
•Required wire size
•Number of conductors required for proper operation.
1. Connect the sensor to the Gasgard 8 Monitor in accordance
with FIGURE 2-3.
"CAUTION
Ensure all sensor connectionsare correct.Usecorrectwiring
techniques and ensure that no wire strands are contacting
other conductors. Failure to wire the sensor correctly may
result in an inoperative or damaged sensor or Gasgard 8
Gas Monitor.
Figure 2-3.
Signal Input Wiring Connection
Chapter 2, Installation
2-4

Relay Wiring Connection
The four alarm relays and the one fault relay are single-pole,
double-throw and can be jumper-configured from within the unit.
Figure 2-4 identifies jumper locations for normally-opened and
normally-closed configurations on the universal relay module,
each channel of which is normally energized (fail-safe). Relay
modules connected to individual channels also have normally
energized fault channels per FIGURE 2-4, but have selectable
energizing for the alarm channels, which will reverse the NO/NC
positions in the case of normally de-energized operation.
Figure 2-4.
Jumper Settings for Relay Configurations
Chapter 2, Installation
2-5

4-20 mA Output Wiring Connection
Each channel card contains one 4-20 mA output. Wiring is shown
in FIGURE 2-5.
Figure 2-5.
4-20 mA Output Wiring Connection
Chapter 2, Installation
2-6

Remote Device Wiring Connection
The Gasgard 8 Monitor can be configured:
•With an external reset switch for silencing alarm conditions from
a remote location (EX ACK)
•For external fault input (EFL)
Wiring must be in accordance with FIGURE 2-6.
Serial Link Module Wiring Connection
The Gasgard 8 Monitor has the capability of interfacing with
either an RS-232 connection (printer) or an RS485 connection
(superior/JBus). Wiring is shown in FIGURE 2-7 and FIGURE 2-8.
Figure 2-6.
Remote Device Wiring Connection
Chapter 2, Installation
2-7

Figure 2-7.
RS-232 Wiring Connection
Figure 2-8.
RS-485 Wiring Connection
Chapter 2, Installation
2-8

Chapter 3
Start-up and Operation
RS-485 Output
The Gasgard 8 Controller uses an RS-485 serial interface with
Modbus protocol. To communicate to the RS-485 output via a
computer interface, an isolated RS-485 converter should be used.
The baud rate is 1200 or 9600 baud with RTU format sent. Each
byte has eight bits with no parity and two stop bits.
Table 3-1. Channel Card Register Addresses
TITLE REGISTER
ADDRESS CHANNEL NUMBER FORMAT
Gas Concentration
40001 1
0 to 1000 (full-scale)
40002 2
40003 3
40004 4
40005 5
40006 6
40007 7
40008 8
Alarm State
40009 1
See TABLE 3-2
40010 2
40011 3
40012 4
40013 5
40014 6
40015 7
40016 8
Table 3-2. Alarm State Format
BIT 5 TO
BIT 15 BIT 4 BIT 3 BIT 2 BIT 1 BIT 1
Free Fault Alarm 4 Alarm 3 Alarm 2 Alarm 1
Chapter 3, Start-up and Operation
3-1

Internal Buttons and Features
The Gasgard 8 Controller is customer
configured by push buttons located on the
front panel of the enclosure. These settings
are user-modified and protected during power
OFF.
Configuration Mode
1. Power unit ON.
•Ready light turns ON.
•Unit will perform a 30-second
self-check,
indicated by dash lines in channel 1.
2. There are two menus accessible through password input.
•Factory Mode <FACT> which allows the operator to
configure the unit
•User Mode <USER> which allows the operator to perform
operations and access limited features.
3. Each channel of the Gasgard 8 Monitor must be configured for:
•Sensor range
•Alarm level
•Alarm upscale or downscale
•Alarm status
•Relay state.
To Access Factory <FACT> Mode:
1. Press the <SCROLL RIGHT> button (FIGURE 3-1)
for five seconds.
•The password must now be entered.
•A 30-second timeout occurs, placing the instrument back
into the monitor mode.
•The default password is 0000 and is entered by using the
<SCROLL UP> and <SCROLL DOWN> buttons for each
digit of the password.
Figure 3-1.
Front Panel Buttons
and Features
Chapter 3, Start-up and Operation
3-2

•Each digit must be validated by pressing the
<VALID> key.
•On the final digit, the unit will indicate <GOOD> for
successful entry and <BAD> for an incorrect entry.
•The password can be modified by using the
<CODE> feature.
2. Configuration of the Gasgard 8 Monitor is performed by
selecting through the programming flowchart (FIGURE 3-2).
3. Use the <SCROLL DOWN> and <SCROLL UP> buttons on
the keypad to access the software options.
4. Press the <ACK/VALID> button to modify the selected
software option.
To Access the Configuration <Conf> Mode:
1. Select <Conf> and press the <ACK/VALID> button.
•Channel 1 displays <n1>, indicating channel 1 is ready for
configuration.
2. Use the <SCROLL RIGHT> and the <SCROLL LEFT>
buttons to initiate configuration of the remaining channels
(n2 through n8).
3. Press the <ACK/VALID> button to configure a specific
channel.
To Access the Channel <CHan> Mode:
1. Select <CHan> and press the <ACK/VALID> button.
2. Use the <SCROLL UP> or <SCROLL DOWN> buttons to turn
the channel ON or OFF.
•Selecting ON inhibits the channel.
•Selecting OFF turns OFF channel outputs.
•The choice is confirmed by pressing the <ACK/VALID>
button or rejected by pressing the <ESC/TEST> button.
To Access the Copy <COPy> Mode:
1. Select <COPy> and press the <ACK/VALID> button.
Chapter 3, Start-up and Operation
3-3