MSA PrimaX IR User manual

Operating Manual
PrimaX® IR
Infrared Gas Monitor
Order No.: 10113581/05
Print Spec: 10000005389 (EO)
CR: 800000052040
MSAsafety.com

© MSA 2022, 2020. All rights reserved
WARNING!
Read this manual carefully before using or maintaining the device. The device will perform as designed only if it is used
and maintained in accordance with the manufacturer's instructions. Otherwise, it could fail to perform as designed, and
persons who rely on this device could sustain serious injury or death.
The warranties made by MSA with respect to the product are voided if the product is not installed and used in
accordance with the instructions in this manual. Please protect yourself and your employees by following the
instructions.
Please read and observe the WARNINGS and CAUTIONS inside. For additional information relative to use or repair,
call 1-800-MSA-2222 during regular working hours.
For countries of Russian Federation, Republic of Kazakhstan and Republic of Belarus, the gas detector will be delivered
with a passport document that includes valid approval information. On the CD with manual instruction attached to the
gas detector the user will find the documents "Type Description" and "Test Method" - appendixes to Pattern Approval
Certificate of Measuring instrument, valid in the countries of use.
The Declaration of Conformity can be found under the following link: https://MSAsafety.com/DoC.
MSA is a registered trademark of MSA Technology, LLC in the US, Europe and other Countries. For all other trademarks
visit https://us.msasafety.com/Trademarks.
1000 Cranberry Woods Drive
Cranberry Township, PA 16066
USA
Phone 1-800-MSA-2222
For your local MSA contacts, please go to our website www.MSAsafety.com

Contents
1 Safety Regulations 4
1.1 Correct Use 4
1.2 Liability Information 4
1.3 Safety and Precautionary Measures to be Adopted 5
1.4 MSA Permanent Instrument Warranty 5
2 Description 7
2.1 User Interface 7
2.2 Package Contents 7
3 Installation 10
3.1 Mechanical Installation 10
3.2 Electrical installation 13
4 Start-up and Calibration 16
4.1 Initial Startup 16
4.2 PrimaX IR Calibration 17
4.3 Calibration Kits 25
5 Maintenance 27
5.1 General 27
5.2 Troubleshooting 27
5.3 HART Information for Troubleshooting 28
5.4 Cleaning 28
5.5 Environmental Guard Cleaning 30
5.6 Calibration Cap Cleaning Procedure 30
6 Technical Data 32
7 Accessories 33
7.1 Flow Cap 33
7.2 Sunshield 34
7.3 Duct Mount Kit 34
7.4 HART Module 34
7.5 Insect Guard/Remote Calibration Inserts 35
8 Approvals 37
8.1 PrimaX IR ATEX/IECEx Approval Information 37
8.2 PrimaX IR cFMus Approval Information 39
8.3 Prima X IR Calibration Cap 40
8.4 Special conditions for the safe use according to ATEX and SIL applications 41
3 PrimaX® IR
GB

1 Safety Regulations
1.1 Correct Use
The PrimaX IR Gas Monitor - referred to hereafter as device - is a fixed infrared combustible gas detector. It is suitable
for outdoor and indoor applications, e.g. offshore industry, chemical and petrochemical industry, water and sewage
industry.
The device utilises infrared technology to monitor, detect and alert users to potentially dangerous levels of combustible
hydrocarbon gas. Dual source technology offers 100% redundancy on the optical source to maximize reliability and
lifetime. This device allows for extremely fast response time whilst providing an extremely stable output signal.
The device is a stand-alone unit with a 4 to 20 mA output with HART [Highway Addressable Remote Transducer] digital
information encoded on the analogue output. The signal of the transmitter can be used in combination with MSA control
units for further actions in safety or non-safety applications. Contact your MSA representative for available controllers.
The device is shipped factory-calibrated and is labelled with target gas, calibration gas and span setting information for
ease of use. Any user changes to the factory assigned values should be noted on the device labels.
The device is explosion-proof and suitable for installation in hazardous locations. This sensor is intended for integration
with a control system that can alert operations personnel to the presence of hydrocarbon combustible gas.
It is imperative that this operating manual be read and observed when using the product. In particular, the safety
instructions, as well as the information for the use and operation of the product, must be carefully read and observed.
Furthermore, the national regulations applicable in the user's country must be taken into account for a safe use. This
includes EN/IEC/UL/CSA 60079-29-2.
WARNING!
This product is supporting life and health. Inappropriate use, maintenance or servicing may affect the function of the
device and thereby seriously compromise the user's life.
Before use the product operability must be verified. The product must not be used if the function test is unsuccessful, it is
damaged, a competent servicing/maintenance has not been made, genuine MSA spare parts have not been used.
For safety reasons this equipment must be operated and serviced by qualified personnel only.
Failure to follow these warnings can result in serious personal injury or death.
Alternative use, or use outside this specification will be considered as non-compliance. This also applies especially to
unauthorized alterations to the product and to commissioning work that has not been carried out by MSA or authorized
persons.
1.2 Liability Information
MSA accepts no liability in cases where the product has been used inappropriately or not as intended. The selection and
use of the product are the exclusive responsibility of the individual operator.
Product liability claims, warranties also as guarantees made by MSA with respect to the product are voided, if it is not
used, serviced or maintained in accordance with the instructions in this manual.
PrimaX® IR 4
1 Safety Regulations GB

1.3 Safety and Precautionary Measures to be Adopted
WARNING!
• The device described in this manual must be installed, operated and maintained in strict accordance with the
labels, warnings, cautions, instructions, and within the limitations stated.
• Protect the device from extreme vibration.
• Do not mount the device in direct sunlight without a sunshield, since this may cause it to overheat.
• The only absolute method to ensure proper overall operation of the device is to check it 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. The device is labeled with the type and value of the factory calibration
gas.
• Use only genuine MSA replacement parts when performing any maintenance procedures provided in this manual.
Failure to do so may seriously impair device performance. Repair or alteration of the device, beyond the scope of
these maintenance instructions or by anyone other than an authorized MSA service provider, could cause the
product to fail to perform as designed.
• There are no field-repairable internal components for this device. Return to MSA for warranty replacement per the
Warranty section.
• This device does not detect the presence of hydrogen gas and must never be used to monitor for hydrogen gas.
• The standard device must never be used in atmospheres containing acetylene gas. Contact MSA regarding
available acetylene sensors.
• Calibrate frequently if used in atmospheres exposed to high levels of solvents or dust. See chapters 4and 5for
calibration and cleaning procedures.
• Do not paint the device. If painting is done in an area where the device is located, exercise caution to ensure paint
is not deposited on the device. Such paint deposits could interfere with the device operation. Solvents in the paint
may also cause an alarm condition to occur.
• The device is designed for applications in hazardous areas under environmental conditions defined in the
Specifications section of this manual.
• The response time of the device can be increased by significant dust deposits. Checks for dust deposits must be
done at regular intervals.
• The device's sensor will detect other hydrocarbon gases than the target gas.
• Oxygen enriched atmospheres greater than 21Vol% can affect the measurement and the electrical safety of the
Gas Monitor. Do not use the device in these atmospheres.
• Do not use to detect combustible dusts or mists.
Failure to follow these warnings can result in serious personal injury or death.
1.4 MSA Permanent Instrument Warranty
Warranty
Seller warrants that this product will be free from mechanical defect or faulty workmanship for
• IR Dual source: ten (10) years from date of shipment, as determined by HARTcommunication that both sources
are non-functional
• Gas Monitor, excluding accessories: three (3) years from date of shipment
• Calibration cap: one (1) year from date of shipment
This warranty is applicable provided the product is maintained and used in accordance with Seller's instructions and/or
recommendations.
5 PrimaX® IR
GB 1 Safety Regulations

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 -
MERCHANT ABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE.
PrimaX® IR 6
1 Safety Regulations GB

2 Description
The device is designed to sample the environment at the installed location and alert the user to potentially dangerous
levels of hydrocarbon gas. The device is shipped factory calibrated and is labeled with target gas, calibration gas and
span setting information.
The output of the device is a standard 4 to 20 mA with HART. The 4-20 mA signal communicates the primary measured
value using the 4-20 mA current loop. Additional device information is communicated using a digital signal that is
superimposed on the analog signal. The device is compliant with HART Communications Foundation (HCF) Revision
7.0 format. Commercially available hand-held communicator devices or PC applications can be used to communicate
with the device using the Device Description (DD) file that is available from the HART Communications Foundation
website (www.hartcomm.org).
2.1 User Interface
This device does not provide a visual display of information. The gas level and basic device status are available via the
4-20mA output signal. Other detailed device status is available via the HART signal. Details about this interface can be
found in the PrimaX IR HART Specification located on the product CD shipped with the device.
The optional calibration cap provides an LCD display for easy and intuitive calibration of the device. The proper usage of
this calibration cap is described in chapter4.2 .
The device should be installed where gas leaks are anticipated. The installation position depends on the gas density,
either in the upper area of the room beneath the ceiling for gases lighter than air, or close to the ground for gases
heavier than air. Also consider how air movement may affect the ability of the device to detect gas. Testing for ventilation
patterns may be helpful in establishing locations for the device in enclosed areas.
Before beginning the installation, check that the delivered components are complete and correct,
referring to the shipping documents and the label on the shipment carton.
2.2 Package Contents
The device will be delivered with the following items in the shipping carton:
• PrimaX IR sensor (316 Stainless Steel)
• Environmental guard
• Quick Start Guide
• Product CD, including this instruction manual, HART specification and installation drawing
7 PrimaX® IR
GB 2 Description

Figure 1 Overview of PrimaX IR parts
1 Environmental guard 4 Calibration cap (optional)
2PrimaX IR sensor (316
stainless steel) 5HART Calibration cap/Bump cap (optional)
3Stainless steel junction box
(optional) 6Remote HART calibration kit (optional)
Accessories to be used with this product may be packaged separately. Check the enclosed shipping papers to identify
all PrimaX IR accessories that have been ordered.
Accessories available for the PrimaX IR Gas Monitor include:
• Optional junction box equipped with a terminal strip for easy wiring
• Optional calibration cap for calibration operations
• Optional tether strap for environmental guard
PrimaX® IR 8
2 Description GB

• Optional HART Calibration cover/Bump cap
• Optional Remote HART Calibration kit
The complete list of accessories is provided in chapter 7.
The device will be labeled with the information shown below:
• Target gas, calibration gas and span value
• Serial number and date of manufacture
• Area classification markings
9 PrimaX® IR
GB 2 Description

3 Installation
3.1 Mechanical Installation
The device’s dimensions are shown below in inches (mm):
Figure 2 Sensor with Aluminum Junction Box
Figure 3 Sensor with Stainless Steel Junction Box
If a junction box is not being used, mount the device on a support by using suitable hardware (not supplied), and in
accordance with local regulatory requirements.
MSA recommends mounting the sensor horizontally. Horizontal mounting will help prevent the build-up of
particulate or liquid matter on the monitor's optical surfaces.
To ensure specified response time mount the sensor with the legs horizontal relative to each other as shown in Figure 4 .
PrimaX® IR 10
3 Installation GB

Figure 4 Recommended mounting orientation
or
Mount horizontally Mount horizontally
1
Hex nut size:
36mm - Metric
1-7/16 - Standard
WARNING!
Do not paint the device. If painting is done in an area where a sensor is located, exercise caution to ensure paint is not
deposited on the sensor. Such paint deposits could interfere with the device operation. Solvents in the paint may also
cause an alarm condition to occur.
Failure to follow this warning can result in serious personal injury or death.
WARNING!
Protect the device from extreme vibration. Do not mount the sensing head in direct sunlight, since this may cause the
sensor to overheat. A stainless steel sunshield is available for the device to protect it from extreme environments.
Failure to follow this warning can result in serious personal injury or death.
CAUTION!
During sensor installation or removal, do not use any tools or apply excessive force to the two legs that support the unit's
reflectors. Applying force to the legs can permanently damage the monitor.
Failure to follow this caution can result in minor or moderate injury.
MSA recommends that the device’s environmental guard should be installed on the unit at all times. If the device is to be
operated without the guard, frequent checks must be made to ensure particulate or liquid matter has not collected on the
windows.
1. Use a wrench on the hex nut in the sensor neck to install or remove the sensor.
Do not apply torque to the two sensor legs.
Optional Junction Box Instructions:
If installing the device on a junction box, verify that the junction box area classification is appropriate for the installation
environment. Two options are available for MSA junction boxes:
• Powder-coated Aluminum
• 316 Stainless Steel
11 PrimaX® IR
GB 3 Installation

A stainless steel mounting plate is included with either junction box to ensure that there is sufficient clearance from the
installed surface (seeFigure 5 andFigure 6 ).
1. Install the mounting bracket and junction box using the bracket holes as the drilling template.
Figure 5 Mounting bracket for Aluminum Junction Box
PrimaX® IR 12
3 Installation GB

Figure 6 Mounting bracket for Stainless Steel Junction Box
2. If not using an MSA supplied junction box, refer to Figure 2 or the dimensional drawing to ensure that there is
adequate clearance. Ensure that the environmental guard can be easily removed and re-installed.
3. The optimum orientation for the device is horizontal.
3.2 Electrical installation
Instructions for Electrical Connection
CAUTION!
The device must be installed only in compliance with the applicable regulations, otherwise the safe operation of the
device is not guaranteed.
Failure to follow this caution can result in minor or moderate injury.
• Shielded cable for measuring devices is recommended.
• Always observe maximum cable lengths and cross-sections shown below.
• Water or impurities can penetrate the device through the cable. In hazardous areas, it is recommended to install
the cable in a loop just before entry into the device or to slightly bend it to prevent water from entering.
Wiring Requirements
The device is a three-wire transmitter that operates in the current source mode and can be wired directly to the input
wires or with an optional junction box. The following table provides typical cable lengths and wire sizes for installation.
The HART signal requires a load across the signal.
13 PrimaX® IR
GB 3 Installation

Wire Size vs Distance
Power Supply Voltage 1.0 mm2(18 AWG) 1.5 mm2(14 AWG) Signal Load
(including termination)
24 Volts 480 m (1575 ft) 720 m (2362 ft) With HART
250 ≤load ≤500Ω
Without HART
load ≤500Ω
Proper installation should prevent water and dirt from entering the unit via the wires or conduit.
The device is provided with 4 wires for use. The table below shows the wire color definitions:
Wiring Color Definitions
Wire color Definition
Red 24 VDC (DC +)
Yellow 4-20 mA Source (SIG)
White 0 VDC (DC -)
Green Earth Ground
Use a maximum (Line + Load) resistance of 500 Ohm between the DC- (white) and 4-20mA source (yellow) wires.
An external power source is required. Use a high quality, DC power supply with low noise characteristics. See the
diagram below for power supply and wiring details:
Figure 7 Sensor Wiring Diagram
18
CAUTION!
Before wiring the device, disconnect or isolate all power connected to the device; otherwise electric shock could occur.
Failure to follow this caution can result in minor or moderate injury.
Power requirements
Input voltage (at sensor) Nominal Maximum
18 V DC 220 mA 350 mA
PrimaX® IR 14
3 Installation GB

Power requirements
24 V DC 175 mA 250 mA
32 V DC 130 mA 200 mA
External Controllers
The device can be connected to any device capable of accepting a 4 - 20mA sourcing analog signal. For FM approved
systems, the connecting device must have latching alarms with manual reset. Ensure that your controller can read all
signals. Check the MSA website www.MSAsafety.com for available controllers.
The HART output is intended to be used with digital control systems that are compatible with HCRevision7.0 protocol.
15 PrimaX® IR
GB 3 Installation

4 Start-up and Calibration
4.1 Initial Startup
The device is factory-calibrated and ready for use. The device provides a 4-20mA output signal that can be used in
conjunction with data acquisition controllers. The digital HART signal that is superimposed on the 4-20 mA output can
be read by control systems that are in compliance with HARTRevision7.0 format.
During device operation, the 4-20 mA output signal is updated once/second and provides the information shown below:
4-20 mA Output Levels [Default Values]
OPERATION 4 - 20 mA Definition
SAFETY CRITICAL FAULT 0.0 mA Sensor failure.
Communications not -available to sensor
*FAULT 2.0 mA Problem detected.
Status available via HART interface
*OBSCURATION OR DIRTY
OPTICS
2.5 mA Light path is blocked
*POWER UP OR -SENSOR -
CALIBRATION
3.0 mA Unit power was recently applied or calibration in
process with CalSignal Enabled
*CLEANING MODE 3.5 mA Defined in chapter 5
NORMAL Gas value scaled
from 4-20mA
for 0-100%LEL
OVERRANGE 20.0 - 20.5mA >100%LEL gas is detected by the device
*Output levels are customer configurable between 2.0 – 3.5 mA via the HART interface. See the Hart Specification on
the product CD for more information.
Transient Fault conditions will be automatically cleared when the unit recovers from the fault condition.
MSA recommends verifying proper response to changes in mAoutputs by using the "Enter Fixed Current Mode"
command described in the PrimaXIRLink HelpGuide to check the four fault conditions noted with a *above. These
checks should be done at every calibration phase.
Calibrations
General
The calibration must be done at regular intervals in accordance with applicable national and regional regulations.
The device is calibrated at the factory. Nevertheless, it is recommended to recalibrate the device after installation. New
sensors should be calibrated more often until the calibration records prove sensor stability. The calibration frequency
can then be reduced to the schedule set by the safety officer or plant manager.
Signal
The 4 - 20 analogue signal is available within 1minute of power-on but the device should be powered for at least
60minutes before attempting calibration to allow for temperature stabilization.
CAUTION!
Carry out the calibration during commissioning as well as at regular intervals. This ensures optimum operation of the
sensor.
PrimaX® IR 16
4 Start-up and Calibration GB

It is recommended that all calibration components are connected before starting a calibration as it is
necessary to apply test gas at the appropriate time as shown in Figure 15 .
Although the device is factory-calibrated, it is good practice to calibrate the unit once it is installed in its final
environmental destination.
As with any type of gas monitor, the only true check of its performance is to apply gas directly to the sensor. New
sensors should be calibrated more often until the calibration records prove sensor stability. The calibration frequency
can then be reduced to the schedule set by the safety officer or plant manager.
Span gas selections are shown in chapter 4.3 .
1. Read all calibration instructions before attempting an actual calibration.
2. Identify and become familiar with all of the calibration components.
Prior connection of the calibration components will make it easier to calibrate the unit.
CAUTION!
Failure to follow the above can result in inaccurate calibration.
Failure to follow this caution can result in minor or moderate injury.
4.2 PrimaX IR Calibration
The device can be calibrated using either the optional calibration cap locally at the sensor, or using the HART digital
interface.
MSA recommends using a calibration gas value in the middle of the measuring range for optimum
calibration.
Calibration methods
CAUTION!
The standard environmental guard is designed to offer fast response time and should not be used for bump or
calibration without the Remote Calibration Inserts (see chapter7.5 , P/N10116419).
Failure to do so could dilute the sample and result in inaccurate calibration.
Although both a full calibration (zero and span) and zero only calibration can be performed on the device, a zero only
calibration may be sufficient to properly calibrate the monitor. Normally, any degradation of the sensor's performance is
associated with slight drifts in zero that, in turn, will adversely affect its span performance. After completing the zero
calibration, perform a span check to ensure proper operation. For a span check, apply a gas of known concentration and
verify that the measured response is within acceptable limits. If the span check is unsuccessful, perform a full zero and
span calibration.
17 PrimaX® IR
GB 4 Start-up and Calibration

Figure 8 MSA Calibration Cap
Figure 9 Remote HART Hand-held
Figure 10 HART Calibration Cover/Bump Cap
Alternate Span Gas Settings
To achieve the most accurate calibration it is always best to use the gas of interest and calibrate at the operating
temperature. If the target span gas is not available, an alternative span gas can be used with the values shown in the
table below. The sensor label will identify the span gas and value used by the factory for calibration. Use of a reference
gas for calibration may decrease accuracy.
PrimaX® IR 18
4 Start-up and Calibration GB

The user may change the gas monitor's span value, gas name and gas curve through use of the PrimaX IR Link
software found on the product CD. Please refer to the PrimaX IR HART Specification and the PrimaX IR Link Help Guide
on the product CD.
Calibration Settings
Target Gas 100%
LEL1
Performance
Approved
Range
Measuring
Range
Calibration
Gas
Span
Value2
t50 t90 Gas
Cal
Curve
No.
Methane 4.40% 0-100% 0-100% 2.5% v/v
Methane
57% ≤ 7 s ≤ 15
s
1
Methane 5.00% 0-100% 0-100% 2.5% v/v
Methane
50% ≤ 7 s ≤ 15
s
1
Propane 1.70% 0-100% 0-100% 0.6% v/v
Propane
35% ≤ 7 s ≤ 15
s
2
Propane 2.10% 0-100% 0-100% 0.6% v/v
Propane
29% ≤ 7 s ≤ 15
s
2
Toluene 1.00% 0-30% 0-100% 2.5% v/v
Methane
57% ≤ 11
s
≤ 28
s
3
Toluene 1.10% 0-30% 0-100% 2.5% v/v
Methane
52% ≤ 11
s
≤ 28
s
3
n-Butane 1.40% 0-30% 0-100% 0.6% v/v
Propane
37% ≤ 10
s
≤ 24
s
2
n-Butane 1.50% 0-30% 0-100% 0.6% v/v
Propane
35% ≤ 10
s
≤ 24
s
2
Acetone 2.50% 0-100% 0-100% 2.5% v/v
Methane
44% ≤ 11
s
≤ 25
s
2
Propylene 2.00% 0-50% 0-100% 1.0%v/v
Propylene
50% ≤ 11
s
≤ 25
s
3
Propylene
Oxide
1.90% 0-100% 0-100% 2.5% v/v
Methane
19% ≤ 11
s
≤ 25
s
3
Propylene
Oxide
2.30% 0-100% 0-100% 2.5% v/v
Methane
16% ≤ 11
s
≤ 25
s
3
Ethane 2.40% 0-50% 0-100% 1.2%v/v Ethane 50% ≤ 11
s
≤ 23
s
3
Ethylene 2.30% 0-100% 0-100% 1.35% v/v
Ethylene
59% ≤ 10
s
≤ 23
s
3
Ethylene 2.70% 0-100% 0-100% 1.35% v/v
Ethylene
57% ≤ 10
s
≤ 23
s
3
Cyclopentane 1.40% 0-100% 0-100% 0.6% v/v
Propane
35% ≤ 10
s
≤ 25
s
2
Cyclopentane 1.50% 0-100% 0-100% 0.6% v/v
Propane
33% ≤ 10
s
≤
25s
2
Isobutane 1.30% 0-70% 0-100% 0.65%v/v
IsoButane
50% ≤ 12
s
≤ 26
s
2
19 PrimaX® IR
GB 4 Start-up and Calibration

Target Gas 100%
LEL1
Performance
Approved
Range
Measuring
Range
Calibration
Gas
Span
Value2
t50 t90 Gas
Cal
Curve
No.
Isobutane 1.80% 0-70% 0-100% 0.6% v/v
Propane
39% ≤ 12
s
≤ 26
s
2
Ethyl Acetate 2.00% 0-100% 0-100% 2.5% v/v
Methane
21% ≤
12s
≤ 25
s
2
n-Hexane 1.00% 0-10% 0-100% 0.5%v/v n-
Hexane
50% ≤ 11
s
≤ 24
s
2
n-Pentane 1.10% 0-30% 0-100% 0.55%v/v n-
Pentane
50% ≤ 11
s
≤ 24
s
2
1IEC/UL/EN 80079-20-1 was used as bases for converting test and calibration gas concentrations from % LEL to %
volume fraction
2For the measurement of n-Pentane, n-Hexane, Propylene, Ethane or Isobutane PrimaX IR shall be calibrated with the
target gas at a span value of approximately 50% LEL.
Bump Check Procedure
A bump check verifies the sensor response to a known concentration of gas. The recommended equipment for a Bump
Check is the HART Calibration Cover/Bump Cap (P/N10122228). A known concentration of gas should be supplied to
the inlet port of the Bump cap and compared to the gas value on the output signal (seeFigure 10 ). Alternately, if using
the environmental guard to perform a bump check the gas should be delivered to both ports of the environmental guard
from a 1.5 l/min regulator. Use PrimaXIR CalibrationKit for the tubing, regulator and Remote HART screens shown
below.
Figure 11 Bump Check setup with environmental guard
Calibration Cap Procedure
1. Remove the environmental guard from the device.
2. The calibration cap is equipped with a slot for an optional tether retention system. The figure below shows the
location of the tether slot.
PrimaX® IR 20
4 Start-up and Calibration GB