MSA Ultima X User manual

Ultima®X
Sampling Module,
DC Aspirated Model
Instruction Manual
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, this device will perform as designed only if it is 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 cus-
tomers to write or call regarding this equipment prior to use or for any additional infor-
mation relative to use or service.
In the U.S., to contact your nearest stocking location, dial toll-free 1-800-MSA-INST
To contact MSA International, dial 1-412-967-3228.
© MINE SAFETY APPLIANCES COMPANY 2009 - All Rights Reserved
This manual is available on the internet at www.msanet.com
Manufactured by
MSA NORTH AMERICA
P.O. Box 427, Pittsburgh, Pennsylvania 15230
(L) Rev 0 10103803
"! WARNING

i
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 onto 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 non-operation of the goods. This exclusion is
applicable to claims for breach of warranty, tortious conduct or any
other cause of action against seller.

General Warnings and Cautions
1. The Ultima X Sampling Module - Aspirated Model described in this
manual must be installed, operated, and maintained in strict
accordance with the labels, cautions, warnings, instructions, and
within the limitations stated.
2. The Ultima X Sampling Module - Aspirated Model is designed to
sample gases or vapors in air. It cannot sample the concentration
of gases or vapors in steam or condensing streams or inert or
oxygen deficient atmospheres.
3. The unit must not be painted. If painting in an area where this unit
is located, ensure that paint is not deposited on the module inlet
fitting. Such paint deposits interfere with the sampling process and
can result in improper readings.
4. Sensors are sealed units containing a corrosive electrolyte. Should
a sensor develop leakage, immediately remove it from service;
then, remove it from its housing assembly and discard it properly.
Ensure that the electrolyte does not contact skin, eyes, clothing or
circuitry; otherwise, personal injury (burns) and/ or equipment
damage may result.
5. Use only genuine MSA replacement parts when performing any
maintenance procedures provided in this manual. Failure to do so
may seriously impair instrument performance. Repair or alteration
of the Ultima X Sampling Module - Aspirated Model, beyond the
scope of these maintenance instructions or by anyone other than
an authorized MSA service person, could cause the product to fail
to perform as designed, and persons who rely on this product for
their safety could sustain severe personal injury or death.
6. Properly vent the exhaust of this unit to a safe area. Improper
venting of the exhaust can cause personal injury or death.
"WARNING
ii

7. Extremely high concentrations of combustible gas or vapor
between the lower explosive limit (LEL) and the upper explosive
limit (UEL) will cause the indication on the Ultima X Gas Monitor to
indicate full scale or above full scale. If the concentration level is
further increased and exceeds the UEL, the display will continue to
show an above scale indication. Gas or vapor concentrations
above the UEL are extremely dangerous since the instrument
cannot measure them accurately, and when reduced by the
addition of air to a level below the UEL, they again constitute a
violently explosive mixture.
Therefore, every alarm causing condition or situation must be
investigated to determine that the
area being monitored does not contain a gas or vapor in air
mixture that exceeds the LEL or UEL.
FAILURE TO FOLLOW THE ABOVE WARNING CAN RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
1. Perform periodic leak check on all of this unit's flow system
components and fittings. Ensure the flow is within specifications.
2. As with all sensors, high levels of, or long exposure to, certain
compounds in the tested atmosphere contaminate the sensors. In
atmospheres where an Ultima X Sampling Module - Aspirated
Model may be exposed to such materials, calibration should be
performed frequently to ensure that channel operation is
dependable and display indications are accurate.
3. The only absolute method to ensure the proper overall operation of
this unit is to check the associated sensor (s) with a known
concentration of the gas for which it has been calibrated.
Consequently, calibration checks must be included as part of the
routine inspection of the system.
FAILURE TO FOLLOW THE ABOVE CAUTION CAN RESULT IN
INJURY, PRODUCT DAMAGE, AND / OR AN UNSAFE CONDITION.
"CAUTION
iii

Ultima X Sampling Module, Aspirated Model (P/N 10058101)
iv

Table of Contents
Chapter 1,
General Information . . . . . . . . . . . . . . . . . . . .1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
The Ultima X Sampling Module - Aspirated Model: . . .1-1
Unpacking Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Figure 1-1. Sampling Module Installation . . . . . . . .1-2
Unit Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Figure 1-2. Identification Label . . . . . . . . . . . . . . . .1-3
Table 1-1. Performance Specifications for
Ultima X Sampling Module - Aspirated Model 1-4
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Chapter 2,
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Mounting the Aspirated Sampling Module Unit
(All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
"CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
"CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Sample Line Placement between Aspirated Sampling
Module and Ultima X Gas Monitor . . . . . . . . . . . . . . . . .2-3
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Table 2-1. Parts List . . . . . . . . . . . . . . . . . . . . . . .2-3
Sample Line Placement . . . . . . . . . . . . . . . . . . . . . . . . .2-4
"CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Figure 2-1. Three Ultima X Monitors &
a Sampling Module . . . . . . . . . . . . . . . . . . . .2-5
"CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Exhaust Line Placement . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Aspirator Connection . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Figure 2-2. Typical Wiring . . . . . . . . . . . . . . . . . . . .2-8
Electrical Connection Procedure . . . . . . . . . . . . . . . . .2-8
"CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
v

"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Table 2-2. Wiring Identification . . . . . . . . . . . . . . .2-10
Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
"CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Chapter 3,
Calibration and Operation . . . . . . . . . . . . . . .3-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Equipment Needed: . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Zeroing the System with the
Ultima X Sampling Module . . . . . . . . . . . . . . . . . . . . .3-2
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Spanning with the Ultima X Sampling Module . . . . . .3-3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
"WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Chapter 4,
Maintenance and
Troubleshooting Guidelines . . . . . . . . . . . . .4-1
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Filter Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . .4-2
Table 4-1. Troubleshooting Guidelines . . . . . . . . . .4-2
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Table 4-2. Parts List . . . . . . . . . . . . . . . . . . . . . . . .4-3
vi

1-1
Chapter 1,
General Information
Introduction
The Ultima X Sampling Module - Aspirated Model:
• must be used with an Ultima X Gas Monitor (available separately)
• draws a gas sample from the monitored area, through a sample
line (available separately) to the Ultima X Gas Monitor sensor
• samples areas that are remote, inaccessible, too hot or too cold for
direct sensor monitoring, such as:
• ducts carrying combustible or toxic gas
• wet wells
• printing drying ovens
• blanking or inerting operations
• comes equipped with:
• necessary flow components (excluding gas sample line) to
properly deliver gas samples to the Ultima X Gas Monitor
• a special flow cap for use on the Ultima X Gas Monitor to
ensure proper sensor sampling.
A properly-installed unit for a single Ultima X Gas Monitor is shown in
FIGURE 1-1. It is also possible for one Aspirated Sampling Module to
supply sample gas for up to three Ultima X Gas Monitors. This
procedure:
• is useful when monitoring up to three different gases
• requires additional Ultima X Gas Monitors with individual flow caps
• is further detailed in Section 2, "Installation."
Unpacking Unit
Carefully unpack your Aspirated Sampling Module (and Ultima X Gas
Monitor, if also newly purchased) from shipping carton(s). Compare
enclosed items with the packing list to ensure all parts ordered were
received; contact shipper or carrier if discrepancies exist.

1-2
Figure 1-1. Sampling Module Installation

Each Aspirated Sampling Module package contains:
• Aspirated Sampling Module
• Flow cap for one Ultima X Gas Monitor
• Tubing and in-line Filter
• End-of-line Filter
• Instruction Manual
Unit Identification
There is one possible Aspirated Sampling Module configuration:
• Explosion-proof (P/N 10058101) unit
Reference the identification label located on the side of the unit
(FIGURE 1-2). See TABLE 1-1 for unit specifications.
Figure 1-2. Identification Label
1-3

Table 1-1.
Performance Specifications
for Ultima X Sampling Module - Aspirated Model
ASPIRATOR AIR Instrument grade air
REQUIREMENTS
MAXIMUM 30 PSIG (206 kPa)
ASPIRATOR
PRESSURE
MINIMUM .6 CFM at 20 PSIG (137 kPa)
ASPIRATOR AIR
CONSUMPTION
MAXIMUM .9 CFM at 30 PSIG (206 kPa)
ASPIRATOR AIR
CONSUMPTION
MAXIMUM POWER 1.8 watts at 9 to 30 VDC
CONSUMPTION
CABLE Four conductor, shielded, 18 AWG (typical)
REQUIREMENTS
FOR ALL GASES
SAMPLE 30 seconds at 0.5 LPM with 50 feet (15.25 meters)
TRANSPORT TIME of .180 (4.57 mm) ID sample tubing
NOMINAL SAMPLE 2 CFH (1 LPM)
FLOW RATE
MINIMUM SAMPLE 1 CFH (.500 LPM)
FLOW RATE
MAXIMUM SAMPLE 100 feet (30 meters)
TUBING LENGTH
MAXIMUM EXHAUST 20 feet (6 meters)
TUBING LENGTH
INLET FITTINGS 1/4" (6.35 mm) OD Tube Fitting
EXHAUST FITTING 1/4" (6.35 mm) OD Tube Fitting
CALIBRATION 1/4" (6.35 mm) OD Barbed Fitting
FITTING
OVERALL 9" x 6" x 5" (228.5 cm x 152.4 cm x 127 cm)
DIMENSIONS
WEIGHT 4.5 lbs. (2 kg)
RATING Explosion-proof enclosure, Class I,
Groups A, B, C and D, Division 1, Hazardous Locations
ELECTRICAL 3/4-14 NPT
ENTRY
TROUBLE 0.6 Amps at 125 VAC
RELAY 0.6 Amps at 110 VDC
RATING 2 Amps at 30 VDC
1-4

Terminology
ELECTRO-CHEMICAL SENSOR -
Sensor employing the reactions of chemicals generating electric
currents to detect certain gases.
EXHAUST GAS - Gas after it has passed through the sensor.
FLOW RATE - The volume-per-minute of gas in the sample line.
SPAN - Full scale or up-scale reading on the meter display.
SPAN GAS VALUE - Gas concentration which gives the instrument an
up scale or full scale value. This value is usually printed on the gas
cylinder containing the gas.
SPANNING - Process of placing a full scale or up scale meter reading
on the display by using calibration span gas cylinders.
ZERO - A zero (0) indication on the meter display usually indicates
ambient air present or no hazardous gases present.
ZEROING - Processes for placing a zero indication on meter display.
1-5

Chapter 2,
Installation
General
Install the Aspirated Sampling Module in the correct area classified in
your facility.
• The explosion-proof model hazardous area classification is
Class I, Division 1, Groups A, B, C and D. It is important that all
local and national codes be followed when installing this model in a
classified area.
Double check the area classification of the sampling module. Refer to
FIGURE 1-2 to find the area classification label on your unit. Ensure
that the Ultima X Gas Monitor is rated properly by referring to Ultima X
Gas Monitor instruction manual (P/N 10036101) for more details.
Do not mix units with different area classifications. All units
used in a classified area must have the proper area classifi-
cation. Otherwise, an explosion hazard will exist, resulting in
a possible explosion, injury or death.
The sampling module for a general-purpose (GP) monitor
can be a source of ignition. Install, locate and operate only
in a non-hazardous area and in accordance with applicable
codes.
If sampling from or exhausting into a separate location, the
installation requires flashback arrestors at the inlet from a
hazardous location and at the outlet to a hazardous location,
to prevent the propagation of ignition of hazardous gases.
Routinely check for aspirated system leaks that could create
an explosive environment inside the enclosure.
Read and follow all instructions, warnings and cautions per-
taining to this gas monitor.
FAILURE TO FOLLOW THIS WARNING CAN CAUSE
IGNITION OF EXPLOSIVE ENVIRONMENTS RESULTING IN
SERIOUS PERSONAL INJURY OR DEATH.
"WARNING
2-1

Mounting the Aspirated Sampling Module Unit
(All Models)
1. Locate the Aspirated Sampling Module and the Ultima X Gas
Monitor(s) in a clean, accessible location.
• Since the unit enclosure is non-corrosive, it can be mounted to
the outside of a building or in other wet environments.
• Use of Teflon tape or non-hardening thread sealant for
environmental reasons is acceptable.
• When installing multiple Ultima X Gas Monitors, locate all
monitors within 18 inches (45 cm) of each other.
Ensure that Aspirated Sampling Module or the Ultima X Gas
Monitor unit front covers are not blocked or obscured. A
blocked front cover will obscure the gas reading indication
and sampling module indications. The unit must be mount-
ed with the electrical input facing down and the label clearly
readable.
2. Mount the Aspirated Sampling Module and Ultima X Gas Monitor
to a wall:
• From the electrical condulet or
• By using optional mounting strap (P/N 10047561) and the four
holes in the rear of the units.
3. Mount Ultima X Gas Monitor SENSOR INLET facing downward
4. Mount Aspirated Sample Module EXHAUST tubing so that the end
of the tubing is facing downward and is the lowest point of the
tubing (see FIGURE 1-1).
The Ultima X Gas Monitor must be mounted with its sensor
at the bottom of the case and the sensor inlet fitting pointed
downward; otherwise, the unit may become inoperative.
"CAUTION
"CAUTION
2-2

Sample Line Placement between Aspirated
Sampling Module and Ultima X Gas Monitor
1. Remove all protective packaging plugs and/or caps from Aspirated
Sampling Module gas INLET and EXHAUST ports.
2. On new installations, skip to Step 4.
On existing installations of the Ultima X Gas Monitor: Remove the
Ultima X Gas Monitor(s) red plastic sensor cap and any gaskets
remaining on the sensor. Do not remove the sensor element.
3. Locate the Aspirated Sampling Module flow block. Install the flow
block(s) on the Ultima X Gas Monitor(s) where the red plastic
sensor cap was removed in the previous step.
See FIGURE 1-1 and FIGURE 2-1.
• Additional flow blocks are available for additional Ultima X Gas
monitors.
• Refer to TABLE 2-1 for a description and part number for
additional flow blocks.
Install the proper flow block with the correct area classifica-
tion for your additional Ultima Gas Monitors. Incorrect flow
blocks will not enable the Ultima Gas Monitor to properly
monitor gas. Incorrect area classification will present an
ignition source, which may cause and explosion resulting in
injury or death.
Table 2-1. Parts List
ITEM PART NO.
Ultima XE Flow Block 10041866
Ultima XIR Flow Block 10042600
4. Attach the supplied tubing to the Aspirated Sampling Module port
labeled "TO ULTIMA X".
5. Attach the other end of the supplied tubing to the side of the flow
block (FIGURE 1-1).
• Tubing can be trimmed to ensure that there are no kinks.
"WARNING
2-3

The in-line filter must be used before the aspirated pump to
prevent water entry from damaging unit.
• In-line filter (P/N 10051406) must be used somewhere along
the tubing length. Ensure that the arrow on the in line filter is
pointing towards the Aspirated Sampling Module.
• If installing additional Ultima X Gas Monitors, install tubing
between units as shown in FIGURE 2-1. Use tubing compatible
with the gas being sampled.
• MSA tubing is available (P/N 600771).
Sample Line Placement
The Aspirated Sampling Module draws a gas sample to the internally-
mounted Ultima X Gas Monitor sensor.
• The Aspirated Sampling Module can be mounted up to 100 feet
(30 meters) away from the monitored area.
• It uses 3/8-inch OD tubing to connect the Aspirated Sampling
Module sample inlet to the end of the sample line in the monitored
area. Tubing must be compatible with the sampled gas.
• It takes a maximum of 30 seconds for the sample gas to reach the
Aspirated Sampling Module when 50 feet (15.25 meters) of tubing
is used:
• To decrease this time, shorten the sample line length.
• It is generally good practice to make the sample line as short
as possible.
• Depending on the gas characteristics, the end of the sampling
tubing and the sample inlet should be mounted to best optimize
sampling of that particular gas. Consult your architect, facility
manager or safety engineer for guidance in proper placement of
the sampling tube inlet.
• Testing for ventilation patterns is useful in establishing sample inlet
location. Smoke tubes (P/N 458481) are useful in measuring the
direction and rate of air flow to determine which areas to monitor.
• The particulate filter provided should be used at the sample
end of the sample line to help prevent dirt and dust from clogging
the sample line. This filter must be compatible with the gas
being sampled.
"CAUTION
2-4

Figure 2-1. Three Ultima X Monitors & a Sampling Module
2-5

• It is recommended that a stainless steel of Teflon (Trademark of
the DuPont Company) sample line be used for monitoring gases
that are highly reactive such as:
• Nitrogen Dioxide
• Sulfur Dioxide
• Chlorine
• Chlorine Dioxide
• Hydrogen Chloride
• Ammonia
• Fluorine
• Bromine.
• Use an end-of-line filter (P/N 637921) with the above gases.
The filter and sample line should be inspected periodically and
replaced if dirty.
All Ultima X Gas Monitors must be mounted in ambient,
interference-free air; otherwise, erroneous readings may
result.
Do not attempt to clean the sample line by applying com-
pressed air.
1. Remove all protective packaging plugs and/or caps from the
Aspirated Sampling Module:
• gas inlet
• exhaust ports.
2. Attach a 1/4-inch (6.35 mm) OD sample tubing to the flow block
sample inlet fitting on the Ultima X Gas monitor (FIGURE 1-1).
Ensure tubing is compatible with the sampled gas.
3. Route the sample tubing to the area to be monitored.
NOTE: Do not run the sample tubing in water or across areas of
vibration, doorways, man ways or access ways; otherwise,
a sample tubing leak or tripping hazard may result.
4. Using suitable hardware (not supplied):
• fasten the sample tubing to supports
• fasten the end of the sample tubing and sample inlet in the
monitoring area.
• The sample inlet should be pointed downward to prevent
dirt and water from entering the sample tubing line.
"CAUTION
2-6

5. Install the provided end-of-line filter at the end of the sampling
tubing, if applicable.
6. Check for leaks along the entire length of the sample tubing line.
Any leak will dilute the gas sample from the area of interest and
give a lower than actual gas reading.
Exhaust Line Placement
1. Attach a 1/4-inch (6.35 mm) OD sample tubing to the exhaust
outlet fitting on the Aspirated Sampling Module Unit.
2. Route the exhaust tubing into a safe area where the gas sample
can be vented. Avoid any sharp bends or elbows. Route the tubing
to allow any collected water to drain.
• The maximum exhaust tubing length is 20 feet (6 meters).
NOTE: Do not run the exhaust tubing in water or across areas of
vibration or across doorways, man ways or access ways;
otherwise, a leak in the exhaust tubing or a tripping hazard
may result.
3. Fasten the exhaust tubing to supports using suitable hardware
(not supplied).
4. Fasten the end of the exhaust tubing in the area of interest by
using suitable hardware (not supplied)
• Exhaust inlet should be pointed downward to prevent dirt and
water from entering the exhaust tubing line.
NOTE: Exhaust to a safe or non-hazardous area only.
5. Check for leaks along entire length of the exhaust tubing line.
Aspirator Connection
Connect the Aspirated Sampling Module to compressed air via the 1/4"
OD tube fitting at the top of the unit. The compressed air must be
instrument-grade quality. Maximum inlet air pressure must not exceed
25 psig (172 kPa).
Connecting the Aspirated Sampling Module to an inferior-
quality or an over-pressure air supply can cause incorrect
gas readings or damage to the Sampling Module.
"WARNING
2-7

Electrical Connection
A flow detector within the Aspirated Sampling Module activates a relay
when sufficient flow exists for proper gas detection. Generally, the
Ultima X Gas Monitor output signal is routed through this relay. When
the flow is insufficient, the relay opens and the gas signal is interrupted.
Equipment monitoring this signal can be configured to sound an alarm
when signal is interrupted. See FIGURE 2-2 for a typical wiring
schematic of the Sampling Module and Ultima X Gas Monitor.
Other devices that alert when the flow loss relay activates can be
connected to relay contact with the Aspirated Sampling Module.
NOTE: The Aspirated Sampling Module requires a four-conductor wire.
Use shielded wire if installing the system where portable two-
way radio, welding or large machinery are located. The shield of
any wire must not be grounded at the Sampling Module or the
Ultima X Gas Monitor. The shield must be grounded at one
point only, usually at the controlling instrument.
Electrical Connection Procedure
1. Turn power OFF from the receiving instrument or power supply for
the system.
Failure to remove power from instrument may damage the
Aspirated Sampling Module and/or the Ultima X Gas Monitor
during wiring.
2. If connecting the field wires to the wiring harness, observe the
identity of the conductors within the wiring harness. Connect field
wires to the appropriate harness conductors.
"CAUTION
Figure 2-2. Typical Wiring
2-8