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User’s Guide
RAEGuard 2 PID
P/N D03-4001-000 Rev D April 2012
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RAEGuard 2 PID User’s Guide
Contents
Section 1: RAEGuard 2 PID User’s Guide
1 General Informat io n ............................................................ 2
2 General Specifications ......................................................... 4
2.1 RAEGuard 2 PID Specifications ........................... 4
2.2 Proper Product Disposal At End Of Life ............... 5
3 Operation ............................................................................. 6
4 Physical Description ............................................................ 7
5 Physical Dimensions ........................................................... 7
6 Installation And Access Instructions ................................... 8
6.1 Mounting ............................................................... 8
6.2 Instrument Disassembly ...................................... 10
6.3 Electrical Wiring ................................................. 11
6.4 Wiring Procedure ................................................. 12
6.5 Earth Grounding Instructions .............................. 13
6.5.1 External Earth Grounding ................................ 13
6.5.2 Internal Earth Grounding ................................. 13
6.5.3 Finished Grounding Wires .............................. 14
6.6 Alarm Contact Setup ........................................... 14
7 Display And User Interface ............................................... 16
7.1 User Interface ...................................................... 16
7.2 Magnet Key ......................................................... 16
7.3 Using The Magnet Key ....................................... 17
7.4 System Initialization ............................................ 17
7.5 Reading Display .................................................. 17
7.6 Instrument Status Display .................................... 18
8 Navigating Settings ........................................................... 19
9 Programming Menus ......................................................... 23
Zero/Fresh Calibration......................................................... 23
Meas. Unit* ...................................................................... 23
High Alarm ....................................................................... 23
Temp. Unit ........................................................................ 23
Span Calibration ................................................................. 23
Meas. Range* ................................................................... 23
Low Alarm ........................................................................ 23
Language .......................................................................... 23
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Set Span Value ................................................................. 23
Meas. Gas* ....................................................................... 23
Ext. Alarm Delay* ............................................................ 23
Pump Duty (%)* ............................................................... 23
Calibration Gas* ............................................................... 23
Pump Cycle(s)* ................................................................ 23
Pump Status* .................................................................... 23
Bus Baudrate .................................................................... 23
Analogout 4mA ................................................................ 23
Analogout 20mA ................................................................ 23
Unit ID .............................................................................. 23
LCD Contrast .................................................................... 23
LCD Backlight .................................................................. 23
Change Password* ............................................................ 23
9.1 Entering Programming Mode .............................. 24
9.2 Calibration ........................................................... 25
9.3 Measurement (Advanced Mode) ......................... 27
9.4 Alarm Setting ....................................................... 31
9.5 Monitor Setup ...................................................... 33
10 Calibration .................................................................. 39
10.1 Zero Calibration ................................................... 40
10.2 Span Calibration .................................................. 42
11 Alarm Signal Summary .............................................. 44
12 Maintenance ............................................................... 45
13 Troubleshooting .......................................................... 45
14 Appendix A: Range, Sensor and Related
Configuration .............................................................. 46
15 ModBus/RS-485 Information ..................................... 46
16 Appendix B: Controlled Section ................................ 48
16.1 Scope ................................................................... 48
16.2 Contents ............................................................... 48
16.3 Scope ................................................................... 50
16.4 Responsibility ...................................................... 50
16.5 Contents ............................................................... 50
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Section 2: DigiPID User’s Guide
Safety Instructions .................................................................... 57
17 Read Before Operating ............................................... 58
17.1 DigiPID Marking ................................................. 59
17.2 Operation Area and Conditions ........................... 60
17.2.1 Hazardous Areas classified by Zones ............ 60
Hazardous Areas classified by Divisions ................. 60
17.3 Instruction For Safe Use ...................................... 60
17.4 Use In Hazardous Areas ...................................... 61
17.5 Year of manufacture ............................................ 61
17.6 Specifications ...................................................... 62
18 General Informat io n ................................................... 63
19 Grounding (Earth Connection) ................................... 64
20 Physical Description ................................................... 65
21 Sensor Parts And Dimensions .................................... 66
22 Operating the Sensor Module ..................................... 67
22.1 Preparing The Sensor For Use ............................. 67
23 Using The Sensor Module .......................................... 68
23.1 Gas Flow Routing Connection ............................ 68
23.2 Sensor Module Calibration .................................. 69
23.3 Maintenance And Calibration .............................. 70
23.4 Replacing the Lamp And Filter ........................... 70
24 Replacing The Sensor’s Teflon UV Shield ................ 72
25 Sensor & Lamp Cleaning/Replacement ..................... 75
25.1 Cleaning The PID Sensor .................................... 75
25.2 Cleaning The Lamp Housing Or Changing
The Lamp ............................................................. 76
25.3 Cleaning The Instrument ..................................... 77
25.4 Ordering Replacement Parts ................................ 77
25.5 Special Servicing Note ........................................ 77
26 Electronic Waste Disposal .......................................... 78
27 Technical Support ....................................................... 79
28 RAE Systems Contacts ............................................... 79
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© Copyright 2012 RAE Systems by Honeywell
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Section 1: RAEGuard 2 PID User’s Guide
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1 General Information
The RAEGuard 2 PID is a fixed photoionization detector (PID) that
measures a broad range of volatile organic compounds (VOCs). It
operates on 10 to 28 VDC and provides an analog (4-20mA) threewire signal output, and RS-485 Modbus digital signal output.
RAEGuard 2 PID uses an intelligent processing platform and digital
sensor technology, supports multiple ranges and resolutions, and can
perform off-line calibration and environmental self-adaptation.
RAEGuard 2 PID has a graphic display and local sound alarm and
light status indicator. A magnetic key interface enables the detector to
be calibrated and operational parameters adjusted with the explosionproof enclosure in place. In addition, the PID module can be easily
removed in hazardous locations for calibration or maintenance.
Key features:
• Digital Smart Sensor Technology
• Three wires, supports 4-20mA analog output
• Can operate with diffusion and flow-through modes and can be
used in most environments
• RS-485 digital communication in ModBus protocol
• Explosion-proof stainless-steel enclosure for hazardous
environment applications
• Magnetic-key interface eliminates the need to open the explosion-
proof housing when adjusting parameters.
• Matrix LCD of 128x64 supports graphic display
• Three-level switch signal outputs, normally closed/normally open
optional (30V load voltage, 2A)
• LED alarms when High or Low alarm point is reached
• Operation at 10 to 28 VDC
• Three dry contacts (<30V, 2A) normally open (or normally closed),
one for High and Low alarm, another for Fault alarm
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Applications:
• Refineries, petrochemical and natural gas plants
• Metallurgical
• Chemical, medication
• Environmental protection
• Electricity, communications
• Fire protec ti on
• Utilities
• Pulp and paper, printing
• Storage
• Sewage disposal
• Food, brewing
• Scientific research, education, homeland security
Hazardous Location Classification:
ATEX
II 2G Ex d ia II CT4 Gb
UL/CSA
Class I, Div. 1, Groups A B C D T4 - pending
IECEx
Ex d ia IIC T4 Gb
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2 General Specifications
2.1 RAEGuard 2 PID Specifications
Basic Parameters
Principle
PID (photoionization detector)
Sensor
Digital Smart Sensor
Sampling
Internal diaphragm pump
Working Current
DC 10 to 28V, 210mA at 24V
Power
<5W
Output
• 4-20mA
• Three-level programmable alarm relays
(30 VDC, 2A)
• RS-485 (Supports Modbus)
IP Rating
IP-65
Mechanical
Interface
3/4" NPT Male
Installation
2" pipe-holding or wall mounting
User Interface
Three-key magnetic bar adjustment
Calibration
Two points
Environmental Parameters
Temperature
-20° C to +55° C (-4° F to 131° F)
Humidity
0 to 95% relative humidity, non-condensing
Pressure
90 to 110kPa
Display
Display
128x64 matrix backlit LCD, supports graphic
display
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RAEGuard 2 PID Specifications (continued)
Physical Parameters
Dimensions,
L x W x H
257 x 201 x 107 mm
(10.1" x 7.9" x 4.2")
Material
Stainless steel
Weight
3.5 kg (7.7 lbs)
Certification
ATEX
II 2G Ex d ia II CT4 Gb
UL/CSA
Class I, Div. 1, Groups A B C D T4 - pending
IECEx
Ex d ia IIC T4 Gb
Ex Entity
Parameters
Um: 28VDC (input supply)
2.2 Proper Produc t Disposal At End Of Life
This symbol (crossed-out wheeled bin) indicates
separate collection of waste electrical and electronic
equipment in the EU countries. This product may
contain one or more Nickel-metal hydride (NiMH),
Lithium-ion, or Alkaline batteries. Specific battery
information is given in this user guide.
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3 Operation
The calibration of all newly purchased RAE Systems instruments
should be tested by exposing the sensor to a known concentration
calibration gas before the instrument is used or put into service. Prior
to factory shipment, the RAEGuard 2 PID is calibrated and tested.
However, the user should calibrate the instrument before the first use.
Kit Accessories include: RAEGuard 2 Magnet Key, and User’s
Guide.
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4 Physical D escrip tio n
The RAEGuard 2 PID can be easily installed and integrated with
various control systems. It is designed with flexible pipeholding/wall-mounting options and standard connection terminals.
5 Physical D imen sion s
The physical dimensions are as shown:
201mm (7.9")
290 mm
(11.4")
257mm
(5.23")
107mm
(4.2")
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6 Installation And A ccess Instructions
6.1 Mounting
First, decide where the transmitter will be mounted. (Refer to
installation drawing, below.) Drill two holes in mounting surface,
with the center of the holes 5.25" (133mm) apart.
Besides directly mounting the RAEGuard 2 PID to a wall, it can be
mounted on a pipe.
WARNING
1. To prevent ignition of hazardous atmospheres, area must
be free of flammable vapors and supply circuit must be
disconnected before removing cover.
2. For European applicati o n, the installation must comply
with the requirements of EN 60079-14.
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Note: When installing the RAEGuard 2 PID, make sure the sensor is
vertically oriented (pointing straight down).
Wall
Pole
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6.2 Instrument Disassembly
Prior to service: Make sure power is OFF. Observe all
Hazardous Location Safety procedures.
1. Loosen the fastening bolt
before unscrewing the
housing lid. Un screw the
housing lid from the housi ng
body by rotating it counterclockwise. (As shipped, one
of the conduit holes is
covered by the provided hexhead plug. The o ther condu it
is for wire connections.)
3. Tilt the instrument assembly
90˚.
4.
Unlock the 24-pin connector
on the ribbon cable.
5.
Lift the entire instrument
assembly out of the housing.
6.
Unscrew the sensor by
turning it counterclockwise.
Disassembled instrument.
2. Pull off the retaining
clip to release the
instrument assembly.
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To reassemble the instrum ent:
1 Reconnect the 24-pin connector of the ribbon cable and lock it in
place.
2 Fasten the cable to the board.
3 Mate the board with the clip on the left side and tilt it over.
4 Click the board into place.
5 Screw on the sensor, making sure not to block the gas inlet hole
and connectors.
6 Screw on the housing top.
7 Screw down the fastening bolt.
6.3 Electrical Wiring
The detector connects to peripheral equipment via three terminal
blocks. These blocks accept 12AWG to 24AWG wire (0.2 to 4.0
mm
2
).
Terminal blocks
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6.4 Wiring Procedure
1. Inside the housing bottom, unplug the two green terminal block
plugs from the terminal block on the PC boards.
Note: The terminal block plugs accept 12 AWG to 24 AWG wire.
2. Lace the wires through the RAEGuard 2 PID’s wire hole(s) and
connect wires to the corresponding pin numbers of the terminal
blocks:
Terminal Terminal Definition
Terminal
description
No.
Block 1
Failure Alarm Contact
ERR
1
Low Level Alarm Contact
LOW
2
High Level Alarm Contact
HIGH
3
Switch signal Common Contact
COM
4
Block 2
4-20 mA Output
OUT
5
Power Supply Negative
GND
6
Power Supply Positive
+V
7
Block 3
RS485A terminal
485A
8
RS485B terminal
485B
9
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6.5 Earth Grounding Instructions
6.5.1 External Earth Grounding
Fasten the crimped ground wire with hardware as illustrated below.
The wire should have a minimum cross-section area of 4mm
2
for its
conductor.
6.5.2 Internal Earth Grounding
Use the same hardware as shown in the illustration of external earth
grounding. The wire should be no less than the size of the power lines.
Signal grounding can connect to a cable’s shielding layer if shielded
cable is used. If a separate wire is used for grounding, its cross section
should be greater than that of the power line.
M4 flat washer
M4 Split washer
M4 Screw
Wire
(Min. 4 mm2
cross-section)
Crimped terminal
Internal earth
grounding
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6.5.3 Finished Grounding Wires
Internal and external grounding are shown here, as well as an
alternate external grounding point. Always follow local electrical
guidelines.
6.6 Alarm Contact Setup
The alarm contacts can drive external alarms such as a light or buzzer.
By default, the three relays are set for normally open (NO) operation,
meaning that contact is closed when in alarm.
You can separately change each relay from normally open to
normally closed (NC) operation by changing the position of the
jumpers on the internal printed circuit board.
Alternate
earth
grounding
point
Internal earth
grounding
External earth
grounding
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Three jumper blocks are located below the three green terminal
blocks. They are labeled (from left to right): J4, J3, and J1. Here are
their functions:
Jumper
Function
J1
High
J3
Low
J4
Error
Lift off the jumper for each one that you want to change and slide it
back on, either connecting the middle and top points or middle and
bottom points.
Important!
Once the system is operational, test the functionality of all three
relays.
Jumper blocks
Normally
Open
Normally
Closed
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7 Display And User Interface
7.1 User Interface
The RAEGuard 2 PID’s user interface consists of a status LED, an
LCD display, and three keys, [+], [MODE], and [-]. The three keys
are operated by using the Magnet Key.
RAEGuard 2 PID user interface.
7.2 Magnet Key
The RAEGuard 2 PID has no external switches, but instead uses the
magnetic end of the RAEGuard Magnet Key (p/n 033-3032-000) to
activate switches built into the un it.
Magnet
SIDE VIEW
TOP VIEW
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7.3 Using The Magnet Key
Using the magnet end of the Magnet Key, briefly touch the glass
above the MODE circle or the triangles labeled [+] and [-]. Then
remove the key straight out and away from the RAEGuard 2 PID.
RAEGuard Magnet Key touching glass above the [+] triangle.
Important! Never drag the key sideways, or two functions may be
activated.
7.4 System Initialization
When the RAEGuard 2 PID’s system power is turned on, it initializes
and a RAE Systems logo appears on the display. As the transmitter is
warming up, each component is checked. The countdown timer
appears on the screen for the warm-up.
7.5 Reading Display
As the transmitter enters the Reading Display, it automatically starts
testing for errors and goes through a cycle of checking each alarm
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condition. If there are no errors or alarm conditions, the green “OK”
LED is lit and the gas concentration is displayed.
If there is an error, the “Fault” LED blinks and an error message
blinks. Each alarm condition has a corresponding LED that blinks an
amber color when the readings are outside a specified range or limit.
7.6 Instrument Status Display
After warm-up, the detector enters the Status Display. It automatically
starts testing for errors and goes through a cycle of checking each
alarm condition. If there is no error message or alarm condition, gas
concentration is displayed and LED flashes green.
If there is an error or alarm, a corresponding message shows on the
screen, and the LED indicates different statuses:
Status
External
Alarm
LED
LCD
Output
Current
Normal
-
Green
Reading
Reading
Low alarm
LOW
Red flashing, 2 Hz
Reading
Reading
High alarm
HIGH
Red flashing, 3 Hz
Reading
Reading
Over
Range
HIGH Red flashing, 3 Hz
22mA
Pump Error ERR Yellow flash ing, 1 Hz
2mA
Lamp Error ERR Yellow flashing, 1 Hz
2mA
Max Alarm -- Red flashing, 3 Hz
--
Sensor
Drift
-- Yellow flash ing, 1 Hz
--
Calibration
Fault
ERR Yellow flash ing, 1 Hz
2mA
Humidity
Sensor
Fault
ERR Green, 1 Hz
Reading
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8 Navigating Settings
You can view the basic settings, clear the Peak and Minimum readings,
and perform a test of the Analog system without entering Programming
Mode.
At the main reading screen, hold the magnetic key over [-] for two
seconds. The RAEGuard 2 screen changes to show the current peak
value in memory:
• If you do not want to clear the peak value, press [-].
• To clear the peak value (reset it), press [+].
This screen appears:
• If you do not want to clear the peak value, press [-]. The screen
advances to Min. Clear.
• To confirm that you want to clear the peak value (reset it), press
[+]. The value is cleared, and this screen is shown:
Advance to the next screen, Min value, by pressing [-].
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• If you do not want to clear the minimum value, press [-].
• To clear the minimum value (reset it), press [+].
• If you do not want to clear the minimum value, press [-]. The
screen advances to Min. Clear.
• To confirm that you want to clear the minimum value (reset it),
press [+]. The value is cleared, and this screen is shown:
Press [-] to advance to the screen showing the measurement gas,
calibration gas, correction factor (CF), and molecular weight (MW) of
the gas:
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Press [-] to advance to the screen showing the measurement range
(M.Range) and high alarm (H.Alarm) and low alarm (L.Alarm)
values:
Press [-] to advance to the screen showing the firmware version and
build time and date, and the serial number of the instrument:
Press [-] to advance to the Analog Output Test screen.
The analog output test is primarily used when commissioning a
system. It ensures that the mA output at the sensor location is the
same as the input received on the system controller. Run the analog
test to make sure that the readings on the detector match the readings
on the controller.
The analog test uses a timed step function to output specific mA
values in sequence. The test starts at 4 mA, wh ich typically
corresponds to 0 ppm output. The analog test then progresses in
increments of 2 mA (4, 6, 8, etc., all the way up to 20mA). The
corresponding sensor reading in ppm is shown on the unit’s LCD
display.
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For example, if you have a sensor range of 0 to 1000 ppm, the
detector LCD displays in sequence 0, 125, 250, 375…all the way up
to 1000 ppm. These are the ppm equivalent values of 4,6, 8, 10, etc.,
all the way up to 20mA.
Note: You can stop the test and exit at any time by pressing [-].
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9 Programming Menus
Programming allows anyone with the password to change the
instrument’s settings, calibrate the instrument, etc. Depending on
whether you use the Basic or Advanced Mode, both of which have
different passwords, you can access different menus and submenus.
This table shows the menus (and their icons) and submenus. Items
marked with an asterisk (*) are only available in Advanced Mode.
They are not available in Basic Mode.
Calibration
Measurement*
Alarm Setting
Monitor Setup
Zero/Fresh
Calibration
Meas. Unit*
High Alarm
Temp. Unit
Span Calibration
Meas. Range*
Low Alarm
Language
Set Span Value
Meas. Gas*
Ext. Alarm
Delay*
Pump Duty (%)*
Calibration Gas*
Pump Cycle(s)*
Pump Status*
Bus Baudrate
Analogout 4mA
Analog out 20m A
Unit ID
LCD Contrast
LCD Backlight
Change
Password*
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9.1 Entering Programming Mode
Enter Programming Mode by using the magnetic key to press these
buttons in sequence:
1. Press [+].
2. Press [-].
3. Press [MODE].
The password screen appears, with the cursor on the first digit:
Input the 4-digit password:
• Increase the number from 0 through 9 by pressing [+].
• Step from digit to dig i t using [-].
• Press [MODE] when you are done.
If you make a mistake, you can cycle through the digits by pressing
[-] and then using [+] to change the number in each position.
Note: The default password for Basic Mode is 1111.
The default password for Advanced Mode is 1250.
Once you enter Programming Mode, the LCD displays the first menu,
Calibration. Each subsequent menu is accessed by pressing [-]
repeatedly until the desired menu is displayed. To enter a submenu of
a menu, press [+].
The Calibration label is shown and its icon is highlighted, but you can
press [-] to step from one programming menu to the next, with the
name of the menu shown at the top of the display and the
corresponding icon highlighted.
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As you repeatedly press [-], the selection moves from left to right, and
you see these screens in sequence:
9.2 Calibration
Two types of calibration are availabl e: Zero (f resh ai r) and Span.
Note: Complete calibration procedures are detailed on page 39.
Press [+] to select Calibration. Otherwise, press [MODE] to go back,
or press [-] to advance to the next menu.
The Calibration screen is shown:
Select Zero or Span Calibration by pressing [-]. Once your choice is
highlighted, press [+].
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Zero/Fresh Calibration
Your options are indicated along the bottom of the screen:
• Press [+] to start.
• Press [MODE] to quit and return to the menu.
If you choose to start zero/fresh air calibration, you see this message:
Please apply zero gas…
Connect the zero gas, start its flow, and then press [+]. There is a
countdown as calibration is performed.
Span Calibration
Your options are indicated along the bottom of the screen:
• Press [+] to start.
• Press [MODE] to quit and return to the menu.
If you choose to start span calibration, you see this message:
Please apply gas…
Connect the calibration gas, start its flow, and then press [+]. There is
a countdown as calibration is performed.
Calibration Gas (Advanced Mode)
You can set the gas that you want as your calibration gas. Calibration
gases are organized in two lists:
• Last Ten is a list of the last ten gases used by your instrument.
The list is built automatically and is only updated if the gas
selected from the Gas Library is not already in the Last Ten. This
ensures that there is no repetition.
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• Gas Library is a library that consists of all the gases found in
RAE Systems’ Technical Note TN-106 (available online at
www.raesystems.com).
•
Press [-] to step between the two options.
•
Press [MODE] to go back to the menu level above it.
•
Press [+] to select your choice and advance to its submenu.
Then follow the steps for the type of selection group you have
chosen:
Last Ten
1. Step through the list’s gases by pressing [-].
2. Register your selection by pressing [+].
3. Save your choice by pressing [MODE].
Gas Library
1. Step through the list’s gases by pressing [-].
2. Register your selection by pressing [+].
3. Save your choice by pressing [MODE].
Note:
Whenever you change the calibration gas type, you must set the
span value.
9.3 Measurement (Advanced Mode )
Measurement settings allow you to set measurement units, range, gas,
and other parameters.
Meas. Unit (Advanced Mode)
Standard available measurement units include:
Abbreviation
Unit
ppm
parts per million
mg/m3
milligrams per cubic meter
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1. Press [-] to move the cursor from “ppm” to “mg/m3” or cycle
through them.
2. Press [+] to register your choice.
3. Press [MODE] to save the selection.
4. Press [+] to save the Measurement Unit, [MODE] to return to
editing it, and [-] to cancel the change.
The new Measurement Unit is saved, and the RAEGuard 2 PID
exits back to the “Monitor Setup” menu.
Meas. Range (Advanced Mode)
Each sensor head has a maximum range for its sensor (for instance,
100 ppm). However, if you want to increase sensitivity in a lower
range, it is possible to change the measurement range (from the preset
100 ppm to 60 ppm, for example).
1. Press [+] to increase the number from 0 to 9 (it wraps around
to 0 again after 9).
2. Press [-] to step through digits.
3. Press [MODE] to save the new value.
If you have set a value that is within range, then you see this screen:
• Press [+] to save the new value.
• Press [MODE] to go back and edit it again.
• Press [-] to exit without making a change.
If the value is within the sensor’s range when you press [+], the value
is saved and “Saved!” is displayed.
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If you have set a value that is outside the sensor’s range, you see this,
along with a message that says, “Invalid Input!”:
You have two options:
• Press [-] to exit without making a change.
• Press [+] to go back to change the value.
Meas. Gas (Advanced Mode)
PIDs can be calibrated to a reference gas, yet display the
concentration readings in equivalent units of the target gas.
Isobutylene is typically used as the calibration gas because it is
inexpensive, readily available, has immediate sensitivity, and has very
low toxicity. The RAEGuard PID can display concentrations of over
200 gases using the built-in library of correction factors. Refer to
RAE Systems Technical Note TN-106, available online at
www.raesystems.com, for further details.
Measurement gases are organized in two lists:
• Last Ten is a list of the last ten gases used by your instrument.
The list is built automatically and is only updated if the gas
selected from the Gas Library is not already in the Last Ten. This
ensures that there is no repetition.
• Gas Library is a library that consists of all the gases found in
RAE Systems’ Technical Note TN-106 (available online at
www.raesystems.com).
•
Press [-] to step between the two options.
•
Press [MODE] to go back to the menu level above it.
•
Press [+] to select your choice and advance to its submenu.
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Then follow the steps for the type of selection group you have
chosen:
Last Ten
1. Step through the list’s gases by pressing [-].
2. Register your selection by pressing [+].
3. Save your choice by pressing [MODE].
Gas Library
1. Step through the list’s gases by pressing [-].
2. Register your selection by pressing [+].
3. Save your choice by pressing [MODE].
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31
9.4 Alarm Setting
During each measurement period, the gas concentration is compared
with the programmed high and low gas concentration alarm limits. If
the concentration exceeds any of the preset limits, the alarms (and
relays) are activated immediately to warn of the alarm condition.
An alarm signal summary is shown in the Instrument Status Display
table on page 44.
In this menu, you can change the High and Low alarm limits. Press
[Y/+] to enter the Alarm Setting menu.
Note: All settings are shown in ppm (parts per million).
1. Select High or Low Alarm by pressing [-].
2. Press [+] to select edit that alarm’s setting. The display shows
a flashing cursor on the left-most digit of the previously
stored alarm setting.
3. Press [+] to increase each digit’s value.
4. Press [-] to advance to the next digit.
5. Again, use [+] to increase the number.
Repeat this process until all numbers are entered.
Press [MODE] when you are done.
Note: If you set an invalid input value, then it says “Invalid input!”
and this set of buttons is shown along the bottom of the display:
•
Press [MODE] to go back and input a valid value.
•
Press [-] to exit back to the main menu without making a
change.
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Ext. Alarm Delay (Advanced Mode)
In order to prevent false alarms, you can set a delay time between
when an alarm event occurs and when the RAEGuard 2 sends out the
alarm signal, up to 60 seconds. If the alarm duration is less than the
alarm delay setting, then no relays will be triggered.
1. Press [+] repeatedly to select a desired number. Numbers
increase from 0 to 9. Once 9 is reached, pressing [+] again
“wraps” around back to 0.
2. Press [-] to advance to the next digit.
Repeat this process until all digits of the new value are
entered.
3. Press [MODE] to register the Ext Alarm Delay value.
4. Press [+] to save the value, [MODE] to go back and edit the
value, or [-] to cancel and return to the menu.
Note: If you set an invalid input value, then it says “Invalid input!”
and this set of buttons is shown along the bottom of the display:
•
Press [MODE] to go back and input a valid value.
•
Press [-] to exit back to the main menu without making a
change.
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9.5 Monitor Setup
This menu has sub-menus for setting the date, time, and other
parameters.
Temp. unit
Set the temperature units to either Fahrenheit or Celsius.
1. Press [-] to place the cursor on the temperature unit you want.
2. Press [+] to make the selection.
3. Press [+] to save your selection, exit the Temp. unit submenu
and return to the Monitor Setup menu.
Note: If you do not want to save the change and want to
make further changes, press [MODE]. Press [-] to exit
without saving the changes.
Language
Choose from English or Chinese.
1. Press [-] to place the cursor on the language you want.
2. Press [+] to make the selection.
3. Press [MODE] to save your selection, exit the Language
submenu and return to the Monitor Setup menu.
Pump Duty (%) (Advanced Mode)
The pump’s duty cycle is the ratio of its on time to off time. The duty
cycle ranges from 50% to 100% (always on), and the period is 10
seconds. Therefore, a duty cycle of 60% means that the pump is on
for 6 seconds and off for four seconds. RAE Systems’ patented duty
cycling is employed by the instrument to clean the PID. A lower duty
cycle has a greater effect on keeping the PID clean than a higher duty
cycle.
Important! Pump duty cycling is interrupted when the instrument
senses a gas. The pump’s duty cycle is disabled when the
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34
measurement is greater than the 2ppm threshold and is re-enabled
when the reading falls below 90% of the threshold (1.8 ppm).
1. Press [+] repeatedly to select a desired number. Numbers
increase from 0 to 9. Once 9 is reached, pressing [+] again
“wraps” around back to 0.
2. Press [-] to advance to the next digit.
Repeat this process until all digits of the new value are
entered.
3. Press [MODE] to register the Pump Duty value.
4. Press [+] to save the value, [MODE] to go back and edit the
value, or [-] to cancel and return to the menu.
Note: If you set an invalid input value, then it says “Invalid input!”
and this set of buttons is shown along the bottom of the display:
•
Press [MODE] to go back and input a valid value.
•
Press [-] to exit back to the main menu without making a
change.
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Pump Cycle(s) (Advanced Mode)
This sets the length of time for one cycle of the pump running.
1. Press [+] repeatedly to select a desired number. Numbers
increase from 0 to 9. Once 9 is reached, pressing [+] again
“wraps” around back to 0.
2. Press [-] to advance to the next digit.
Repeat this process until all digits of the new value are
entered.
3. Press [MODE] to register the Pump Cycle(s) value.
4. Press [+] to save the value, [MODE] to go back and edit the
value, or [-] to cancel and return to the menu.
Note: If you set an invalid input value, then it says “Invalid input!”
and this set of buttons is shown along the bottom of the display:
•
Press [MODE] to go back and input a valid value.
•
Press [-] to exit back to the main menu without making a
change.
Pump Status (Advanced Mode)
This tells you whether the pump should be on or off, and allows you
to set whether the pump is on or off.
•
Press [-] to select On or Off (the black dot in the circle
indicates the selection).
•
Press [+] to make the change to your selection.
•
Press [MODE] if you want to exit without making a change.
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Bus Baudrate
Choose from three different baud rates for Modbus data transmission:
4800, 9600, or 19200.
1. Press [-] to place the cursor on the baud rate you want.
2. Press [+] to make the selection.
3. Press [MODE] to save your selection.
4. Press [+] to store the selection and exit the submenu and
return to the Monitor Setup menu.
Note: If you do not want to save the change and want to
make further changes, press [MODE]. Press [-] to exit
without saving the changes.
Analogout 4mA
This feature sets the analog output to 4mA for system setup and
troubleshooting.
1. Press [+] repeatedly to select a desired number. Numbers
increase from 0 to 9. Once 9 is reached, pressing [+] again
“wraps” around back to 0.
2. Press [-] to advance to the next digit.
Repeat this process until all three digits of the new value are
entered.
3. Press [MODE] to save the 4mA analog output value.
Analogout 20mA
This feature sets the analog output to 20mA for system setup and
troubleshooting.
1. Press [+] repeatedly to select a desired number. Numbers
increase from 0 to 9. Once 9 is reached, pressing [+] again
“wraps” around back to 0.
2. Press [-] to advance to the next digit.
Repeat this process until all four digits of the new value are
entered.
3. Press [MODE] to save the 20mA analog output value.
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Unit ID
When using Modbus communication, you can give each RAEGuard 2
PID on a network a unique Unit ID that helps identify it.
1. Press [+] repeatedly to select a desired number. Numbers
increase from 0 to 9. Once 9 is reached, pressing [+] again
“wraps” around back to 0.
2. Press [-] to advance to the next digit.
Repeat this process until both digits of the new value are
entered.
3. Press [MODE] to save the 20mA analog output value.
LCD Contrast
The display’s contrast can be increased or decreased from its default
setting. You may never need to change the default setting, but
sometimes you can optimize the display to suit extreme temperature
and ambient brightness/darkness conditions.
1. Press [+] to step through the contrast levels. The range is 1 to
99. Once 99 is reached, pressing [+] again "wraps" around
back to 10.
2. When you have completed your selection, press [MODE].
3. Press [+] to save your selection, and exit LCD Contrast.
Note: If you want to make further changes, press [MODE] to
return to the adjustment screen. Pr ess [-] to exit without
saving the changes.
LCD Backlight
The backlight glows whenever you press a button with the magnetic
key. In addition, you can set the backlight to be either always on or
only on when an event (alarm) occurs.
1. Press [-] to place the cursor on the setting you want.
2. Press [+] to make the selection.
3. Press [MODE] to save your selection, exi t the LCD Ba cklight
submenu and return to the Monitor Setup menu.
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Change Password (Advanced Mode)
You can change the four-dig it passwo rd for acc ess ing Basic Mode.
The default basic password is: 1111
The advanced password is: 1250
Note: You cannot change the password for accessing Advanced
Mode.
1. Press [+] to step through all 10 numerals (0 to 9).
2. Press [-] to advance to the next digit. The next digit to the
right flashes.
Repeat this process until all four digits of the new password
are entered.
3. Press [MODE] to register the selection.
4. Press [+] to save the new password, [MODE] to return to
editing the password, and [-] to cancel the change.
The new password is saved, and the RAEGuard 2 PID exits back
to the “Monitor Setup” menu.
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10 Calibration
The RAEGuard 2 PID is calibrated using a two-point calibration process.
First, use a “zero gas.” Then use a “span gas” containing a known
concentration of a standard reference gas, to set the second point of
reference.
Note:
Zero calibration must be performed before span calibration.
RAEGuard2 PID connected to gas bottle with calibration
adapter.
To perform a calibration, you need a cylinder of zero gas, a cylinder
of span gas, and a calibration adapter.
WARNING
The cali brat ion of al l newl y purcha sed RA E Syste ms ins tru ments
should b e teste d by exp osing the sens or(s ) to a kn own
concen tra tion cal ibr at io n gas be for e t he i ns tru men t is us ed or
put into service. F or maximu m safety, the accuracy of the
RAEGuard 2 PID should be checked by ex posing t he sensor to a
known c onc entr a tion cal ibra ti on g as.
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10.1 Zero Calibration
1. Connect the zero gas cylinder to the gas inlet port on the
RAEGuard2 PID using the provided calibration adapter.
2. In measurement mode, use the magnet key to press [+],
[-], and then [MODE] in sequence.
3. Input your password, followed by [-].
The instrument enters the calibration menu.
4. Press [+] to enter the Calibration menu.
5. Press [-] until “Zero/Fresh calibration” is highlighted.
Press [+], and this screen appears:
6. Start the gas flow.
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7. Press [+]. A countdown screen is shown as the calibration is
performed:
Note: You may abort the calibration during the countdown by
pressing [-]. If you stop the calibration, the process stops and
this screen is displayed befo re the men u screen is s how n:
8. Once the calibration is complete, this screen is shown:
9. If the calibration is not successful, and you see the “Zero
Calibration Failed” message, check that the inlet is not
blocked and that there are no other problems before retrying.
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10.2 Span Calibration
1. Connect the calibration gas cylinder to the gas inlet port on
the RAEGuard2 PID using the provided calibration adapter.
Note: Make sure the labeled concentration of calibration gas
matches the value that is set in the RAEGuard 2 PID.
2. If the RAEGuard 2 PID is not already in Programming Mode,
use the magnet key to press [+], [-], and then [MODE] in
sequence.
3. Input your password, followed by [-].
The instrument enters the calibration menu.
4. Press [+] to enter the Calibration menu.
5. Press [-] until “Span calibration” is highlighted.
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43
6. Press [+], and this screen appears:
7. Start the gas flow.
8. Press [+]. A countdown screen is shown as the calibration is
performed:
Note: You may abort the calibration during the countdown by
pressing [-]. If you stop the calibration, the process stops and
this screen is displayed before the menu screen is shown:
9. Once the calibration is complete, this screen is shown:
10. If the calibration is not successful, and you see the “Span
Low Failed!” message, check that the inlet is not blocked,
the sensor or lamp are not fouled or damaged, and there are
no other problems before retrying.
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11 A larm Signal Summary
The following are reading-related alarms.
Status
LCD
LED
Indication
Relay Status
Analog
Output
Normal
Green
Failure: Disable
Low alarm: Disable
High alarm: Disable
According
to Readi ng
Value
Low Ala r m
Red
(2 flashes
per second)
Failure: Disable
Low alarm: Enable
High alarm: Enable
According
to Readi ng
Value
High Alarm
Red
(3 flashes
per second)
Failure: Disable
Low alarm: Disable
High alarm: Enable
According
to Readi ng
Value
Over Range
Red
(3 flashes
per second)
Failure: Disable
Low alarm: Disable
High alarm: Enable
22mA
Pump Error
Yellow
(1 flash
per second)
Failure: Enable
Low alarm: Disable
High alarm: Disable
2mA
Lamp Error
Yellow
(1 flash
per second)
Failure: Enable
Low alarm: Disable
High alarm: Disable
2mA
Max Alarm
Red
(3 flashes
per second)
Failure: Disable
Low alarm: Disable
High alarm: Enable
2mA
Sensor
Negative
Drift
Yellow
(1 flash
per second)
Failure: Enable
Low alarm: Disable
High alarm: Disable
2mA
Calibration
Failure Error
Yellow
(1 flash
per second)
Failure: Enable
Low alarm: Disable
High alarm: Disable
2mA
Humidity
Sensor Error
Green
Failure: Disable
Low alarm: Disable
High alarm: Disable
According
to Readi ng
Value
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12 Maintenance
As a guide, it is recommended to regularly “bump test” a RAEGuard
2 PID unit with a known percentage gas. Also, periodically check the
sensor inlet and outlet to make sure they are clean and unobstructed.
13 Troubleshooting
Note: Before attempting to diagnose measurement problems, perform
zero and span calibrations.
Message
Reason and Solution
Reason: Instrument over range.
Solution: Confirm the level of gas concentration.
Check sensor.
Reason: Pump failure.
Solution: Make sure that the air path is not blocked.
Check pump.
Reason: Lamp failure.
Solution: Check Sensor.
Reason: Sensor drift.
Solution: Check sensor and/or perform zero and
span calibration.
Reason: Calibration fails.
Solution: Check calibration operation.
Change sensor or contact RAE Systems
Customer Service.
Reason: Humidity sensor failu re.
Solution: Check the humidity in the area.
Make sure that the air path is not blocked.
Contact RAE Systems Customer Service.
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14 Appendix A: Range, Sensor and
Related Configuration
The following table shows the measurement range and related
configurations for four different DigiPID sensor modules:
Sensor
(ppm)
Resolution
(ppm)
Span Gas
Setup
Default
Value
Default Alarm Setup (ppm)
Low Alarm High Alarm
0-100
0.01
10
10
20
0-1000
1
100
10
100
15 ModBus/RS-485 Information
The RAEGuard s communicates by means of MODBUS RTU. All
monitors provide a 4-byte register value. Note: Gas concentration is
the only value that can be retrieved.
For example, 34 hex = 52 decimal
Overview
This document describes the modbus protocol used in RAEGuard 2
PID products.
1. Communication Setting
Communication Mode: RTU
Controller: PC or Controller
Client: RAEGuard 2 PID
Baud Rate: 4800, 9600, 19200
Client ID: 1 to 99 (0x0001 to 0x0064)
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2. Data Structure/C ommunication Steps
RAEGuard 2 PID only supports Function Code 0x03 (read-only
registers). The detector only supports value reading.
0x03: Read-Only Register
Requesting Message:
Device
Address
Func-
tion
Code
Register
Address
High
Byte
Register
Address
Low
Byte
Quantity
of
Registers
High Byte
Quantity
of
Registers
Low Byte
CRC
Low
Byte
CRC
High
Byte
Client ID
03
00
08
00
02
CRC
CRC
Answering Message:
Device
Address
Function
Code
Byte
Count
Register Value
CRC
Low
Byte
CRC
High
Byte
Client ID
03
04
Reading
Highest
Byte
Reading
Higher
Byte
Reading
High
Byte
Reading
Low Byte
CRC
CRC
Note: The length of data from the detector is 4 bytes.
Example:
Request: 01 03 00 08 00 02 45 C9
Answer: 01 03 04 00 00 00 D1 3A 6F
Note: The maximum communication distance should be less than 1
km when using a 1.5 mm
2
cable.
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16 Appendix B: Co ntrolled Section
RAEGuard 2 And DigiPID
16.1 Scope
The scope of this document is to describe the system aspects for use
of the RAEGuard 2 PID by connection of the RAEGuard2 and
DigiPID according to EN60079-25; UL913 and CAN/CSA-C22.2 No.
157-92 in hazardous locations.
16.2 Contents
RAEGuard2
certification
DIGI PID
certification
Comment
to
integration
ATEX/IECEx certification for zones
ITS
11ATEX17231X
KEMA10ATEX0059
-
IECEx ITS
11.0005X
IECEx KEM
10.0005
-
Ex d [ ia Ga ]IIC
T4 Gb
Ex ia IIC T4 Ga
Gb
Ga
Gb < Ga
UL/CSA certification for Divisions
RAEGuard 2
Associated [ia] output
Intrinsically safe, ia, PID
DIGI PID
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49
CID1
CID1
same
-40º C < Tamb <
+55º C
Um: 28VDC
-
-
Uo: 5.91V
Ui: 6.13V
Uo < Ui;
OK
Io: 0.8A
Ii: 1.5A
Io < Ii;
OK
Po: 1.16W
Pi: 1.225W
Po < Pi;
OK
Co: 30µF
Ci: 20.2µF
Ci < Co;
OK
Lo: 55µH
Li: 1µH
Li < Lo;
OK
As demonstrated in the table above, RAEGuard 2 and DigiPID have
matching entity parameters, which allows the two devices to be
connected to form a single piece of equipment: RAEGuard 2 PID,
with the resulting Ex specification given below, suitable for
installation in hazardous areas defined by zones as Ex d ia IIC T4 Gb.
The marking is found on each of the two connected devices.
Resulting RAEGuard2 PID Ex specification
Ex d ia IIC T4 Gb
-20º C < Tamb < +55º C
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RAEGuard 2 PID User’s Guide
50
RAEGuard 2
16.3 Scope
The scope of this document is to identify the section of the
RAEGuard2 controlled part of manual.
16.4 Responsibility
The included sections cannot be changed without prior approval from
the Notified Body.
16.5 Contents
Below are the sections controlled by the Notified Body, including all
safety-related information in the manual.
Controlled sections are:
1.Warnings and directive information
2. Marking of RAEGuard2
3. Hazardous Location Classifications
4. Instructions for Safe Use
5. Connections and Ratings
6. Maintenance
7. Physical dimensions
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1. Warnings And Directive Information
- READ BEFORE OPERATING -
This manual must be carefully read by all individuals who have or will
have the responsibility of using, maintaining, or servicing this product.
The product will perform as designed only if it is used, maintained,
and serviced in accordance with the manufacturer’s instructions.
CAUTION!
To reduce the risk of electric shock, turn the power off before
removing the instrument cover. Disconnect the power before
removing the sensor module for service. Never operate the
instrument when the cover is removed. Remove instrument cover
and sensor module only in an area known to be non- hazardous.
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2. Marking Of RAEGuard 2
The RAEGuard 2 is certified according to ATEX and the IECEx
schemes as protected by a flameproof enclosure provided one or two
associated equipment output port protected as intrinsically safe [ia],
one of which can include a set of flame arrestors for gas sampling.
The product is marked with the following information:
RAE Systems Inc.
3775 N. 1st. St.
San Jose, CA95134 USA
Serial number: XXXXXXXXXX
RAEGuard 2, FGM-2XXX
IECEx
ATEX
IECEx ITS 11.0005X
ITS 11ATEX17231X
Ex d [ia Ga] IIC T4, Gb
0575 II 2(1)G, Ex d [ia Ga]
IIC T4 Gb
-20ºC < Tamb < +55ºC
Um: 28VDC; Uo: 5.91V; Co: 30µF; Lo: 55uH; Io: 0.8A; Po:
1.16W
Year of manufacture: XXXX
WARNING: DO NOT OPEN WHEN AN EXPLOSIVE
ATMOSPHERE MAY BE PRESENT.
REFER TO USER MANUAL FOR ENTRY TYPE AND SIZE
RATING: < 5W. 10 ~28VDC
4. Hazardous Location Classification
Hazardous Areas Classified By Zones
RAEGuard 2 are intended to be used in hazardous areas classified for
zone 1 or zone 2, within the temperature range of -20
o
C to +55oC,
Where gases of explosion groups IIA, IIB or IIC
and T4 may be present.
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5. Instructions For Safe Use
It must be ensured that the supply voltage for RAEGuard 2 comply
with the Um input entity parameter. The 8-pin output interface
connector facilitates connection to intrinsically safe equipment, e.g.
sensors or modems. The connected devices must be protected by
intrinsically safety, ia, ib or ic for gases in group IIA, IIB or IIC.
The connected device must have entity parameters that comply with
general fitting rules for entity parameters with the output entity
parameters of the RAEGuard 2 interface. The DigiPID sensor can be
mounted on the on the RAEGuard 2 interface inside hazardous are in
powered condition. This constellation is called RAEGuard 2 PID.
6. Connections And Ratings
Outline drawing of the interface:
Figure1
Output interface port definition:
The pin definition of the 8-pin output connector is given in the table
below:
Pin No.
1 2 3 4 5
6 7 8
Definition
Power
Out
CS
Analog
Single
RXD
Open
Drain
GND Cn TXD
7
8
1
2
In Out
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54
Input/output entity parameters
The rated RAEGuard2 input/output parameters are as follows:
Input: Um: 28VDC
Output: Uo: 5.91V
Co: 30µF
Lo: 55uH
Io: 0.8A
Po: 1.16W
Cable Entry type and Size
RAEGuard2 is provided with three female 3/4" - 14 NPT cable entry
holes tapped into its side walls. One or two of these three cable
entries are mounted with safety adapter interface type ISA-100/ ISA-
101.
7. Maintenance
Calibration
The monitor should be calibrated for no less than every 6 months
depending on use and exposure to gas and contamination.
- Calibration interval may very due to national legislation
- RAE Systems recommend the use of RAE Systems
calibration gas
Installation and Access Instructions
• When used in North America, conduit runs must have a
sealing fitting connected within 18" (457mm) of the
enclosure. CSA requires seals in conduit exceeding 5'
(1.524 m) in Group C atmospheres.
• The appropriate regulations for installation, service and repair
must be properly observed during such activities. Installation
in ATEX/IECEx area must be done as outlined in EN/IEC
60079-14.
• To prevent ignition of hazardous atmospheres, area must be
free of flammable vapors and supply circuit must be
disconnected before removing cover.
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8. EARTH GROUNDING INSTRUCTIONS
External Earth Grounding
Fasten the crimped ground wire
with hardware as illustrated below.
The wire should have a minimum
cross-section area of 4mm
2
for its
conductor.
Internal Earth Grounding
Use the same hardware as shown in
the illustration of external earth
grounding. The wire should be no
less than the size of the power lines.
Finished Grounding Wires
Internal and external grounding are
shown here, as well as an alternate
external grounding point. Always
follow local electrical guidelines.
Sensors are not interchangeable; use only RAE System s
sensors, and use only the sensor type specified for your
RAEGuard2 monitor. Use of non-RAE Systems components will
void the warranty and can compromise the safe performance of
this product.
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9. Physical Dimensions
RAEGuard 2 can be easily installed and integrated with various
control systems with its flexible pipe-holding/wall-mounting options
and standard connection terminals. The physical dimensions are as
follows:
130mm
187mm
112mm
118mm
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SECTION 2: DigiPID User’s Guide
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58
SAFETY INSTRUCTIONS
17 Read Before Operating
This manual must be carefully read by all individuals who have or
will have the responsibility of using, maintaining, or servicing this
product. The product will perform as designed only if it is used,
maintained, and serviced in accordance with the manufacturer’s
instructions. The user should understand how to set the correct
parameters and interpret the obtained results.
CAUTION!
Sensor interface connector pins cannot be interchanged for multiple
applications. Apply the sensor in accordance with connector
definitions described in the datasheet and in accordance with the
general fitting rules for the applied intri nsi ca lly safe entity
parameters. Use only RAE Systems lamps and the sensor detector
type specified for your module. Maintain by using only RAE Systems
accessories, including a Teflon filter or UV shield. Use of non-RAE
Systems components will void the warranty and can compromise the
safe performance of this product.
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17.1 Dig iPID Markin g
The DigiPID is certified according to the IECEx scheme, ATEX and
CSA for US and Canada as protected by intrinsic safety.
The product is marked with the following information:
RAE SYSTEMS
3775 N. 1
st
. St., San Jose
CA 95134, USA
DIGI PID
Type DS100/DS101/DS102
Serial No/barcode: XX X-XXXX-000
IECEx KEM
10.0005
Ex ia IIC T4
Ga
Ex ia I
0575
IM1/II 1G
Ex ia IIC T4
Ex ia I
KEMA10ATEX0059
Class I, Gr. A,B,C,D T4
Only as to intrinsic safety
for use in hazardous loc.
Intrinsically safe/ Securite
Intrinseque/Exia
Pi: 1.225W; Vi: 6.13V; Ci: 20.2µF; Ii: 1.5A; Li: 1µH.
-40º C < Tamb < +55º C
Warning: Read User’s Manual for Intrinsic Safety Precautions
Page 65
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17.2 Operation Area and Conditions
17.2.1 Hazardous Areas classified by Zones
DIGI PID is intended to be used in hazardous areas or mines
susceptible to fredamp classified zone 0, zone 1 or zone 2, within the
temperature range of -40º C to +55º C, where gases of explosion
groups IIA, IIB or IIC and T4 may be present.
Hazardous Areas classified by Divisions
DIGI PID is intended to be used in hazardous areas classified for
Class I Div. 1 or 2, within the temperature range of -40º C to +55º C,
where gases of explosion groups A, B, C or D and temperature class
T4 may be present.
17.3 Instruction For Safe U se
Strictly follow the instructions for safe use. Application of the
DigiPID requires full understanding and strict observation of the
instructions.
The DigiPID can be connected to Ex-certified equipment for use in
hazardous areas, when it is secured tha t the connec tio n is com ply ing
with the intrinsically safe input entity parameters for the two units,
and the intended function area corresponds to the certified area.
The DigiPID sensor can be connected and disconnected inside the
hazardous area.
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17.4 Use In Hazardous Areas
Equipment which is intended for use in explosive atmospheres and
which has been assessed and certified according to international
regulations may be used only under s pecif ied conditions. The
components may not be modified in any way.
The appropriate regulations for service and repair must be properly
observed during such activities.
17.5 Year of manufacture
To identify the year of manufacture, refer to the serial number of the
instrument.
The second to last digit in the serial number indicates the year of
manufacture. For example, “H” indicates the manufacturing year is
2008.
First digit
Year
J
2008
K
2009
M
2010
N
2011
P
2012
Q
2013
R
2014
S
2015
T
2016
U
2017
V
2018
W
2019
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17.6 Specifications
Power Supply
5V ±0.25V DC
Current
110 mA max
Power Consumption
< 0.6W
Measuring Range
0 to 100 ppm, 1 to 1000 ppm
Resolution
10 ppb, 100 ppb, 1 ppm (depends on
model)
Response Time
Diffusion (T90): 30 s
Pumped (T90): 5 s
Calibration
Two-point off-line and field calibrat ion
Accuracy
±2% for calibration point
Zero Drift
±10% FSS/Month
Span Drift
±10% FSS/Month
Analog Output
0.5 - 2.5V (ro=1.0k)
Digital Interface
Serial Interface (UART)
Transmit (Tx): 3.3V TTL
Receive (Rx): 3.3V TTL
Sensor Lifetime
2 years
Operating
Temperature
-20º C to +55º C (-4º F to +131º F)
Humidity
0 to 95% RH non-condensing
EMI/RFI
Highly resistant to EMI/RFI
Compliant with EMC Directive 2004/108/EC
Package
Rugged case for 1.2m drop test
Spray watertight for IP65 rating
Dust membrane for sensor front protection
Size (DxL)
49mm x 150.8mm (1.92″ x 5.94″)
Weight
< 550g (19.4 oz)
Ex entity parameters
Pi: 1.225W; Vi: 6.13V; Ci: 20.2µF; Ii:
1.5A; Li: 1µH
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18 General Information
The DigiPID Sensor is a self-contained intelligent sensor module with
built-in photoionization detector (PID) sensor processor, lamp driver,
and analog and digital interface circuits. It is designed to detect
volatile organic compounds (VOC) and has a standard external
interface. This sensor module can be easily integrated into a wired or
wireless communication system for remote, wide-area, and pervasive
monitoring applications. The sensor module can be powered by a 5V
±0.25V DC power supply. It is housed in a weatherproof enclosure
with a standard 8-pin interface connector. The chart below details the
functions of the eight pins:
Pin
Number
1 2 3 4 5 6 7
8
Definition
Power
In
CS
Analog
Signal
Out
RXD
Open
Drain
GND
Control
Signal
(optional)
TXD
Notes:
Power in: Power supply input connector for the sensor module. The
input voltage range is DC 5V ±0.25V at 200mA.
CS: Communication Select. Select (falling edge) to start
communication, deselect (rising edge) to stop communication.
Analog Signal Out: Analog signal output with 1kΩ output resistance
for the sensor module. The output signal range is between 0.5V and
2.5V.
RXD & TXD: Serial interface poles (receive and transmit) for UART
mode with 3.3V TTL level.
Open drain: Switching signal output pole. It can deliver low or high
level to external equipment according to customer requirements.
GND: Power and signal ground.
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Control signal: This optional pole only delivers a high (3.3V) or low
(0V) signal le v el.
Caution: 6.2V is the maximum input voltage for all of the sensor
module’s input poles.
19 Grounding (Earth Connection)
DigiPID includes a grounding connection via pin 6 of the 8-pin
connector. If the complete installation must be grounded, ensure that
the thread on which DigiPID is mounted is correctly grounded.
Check local ordinances regarding further requirements.
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20 Physical Description
The DigiPID is a pumped sensor. The pump is in this version
intended to pump the sample gas in though one of the DigiPID gas
tubes and return it through the other.
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21 Sensor Parts And Dimensions
DigiPID sensor shown with optional mounting adaptor
8-pin
interface
connector
Sample outlet
Pump connections
Sensor module
PID Lamp
Sensor detector
Teflon O-ring
Sensor cover with
filter installed
Optional
mounting
adapter
Fastening nut
Optional mounting
adapter
Sample inlet
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22 Operating the Sensor Module
22.1 Preparing The Sen sor For Use
Make sure the 8-pole input of the external intrinsically safe
equipment matches the interface connector pinout configuration of
the DigiPID. Make sure the input power supply range is between
4.75V and 5.25V DC, and the input current is about 200mA when the
sensor module is operated. The following mechanical drawing
includes the sensor module interface connector’s pinout. The Ex
entity parameter of the equipment connected to the DigiPID must fit
the entity parameters of DigiPID according to intrinsically safe fitting
rules.
8-pin connector pinout configuration:
1: Power in
2: CS (Communication Select). Select (falling edge) to start
communication, deselect (rising edge) to stop communication.
3: Analog Signal Output
4: RXD
5: Open Drain
6: GND
7: Control Signal (Optional)
8: TXD
Note: Some external equipment requires no connection to pins 5 and 7.
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23 Using The Sensor Module
23.1 Gas Flow Routing Connection
The DigiPID has an “IN” and “OUT” port for sampling gas. Make
sure that the in and out sample tubes are properly oriented.
After making all gas connections and ensuring connection to the 8-pin
connector, turn on the power supply and warm up the sensor module.
Note: A two-hour warm-up time is recommended before making
measurements.
Firmly affix the sensor module to external equipment and make sure
the 8-pole interface connector makes a reliable, tight connection with
other equipment.
When you begin measurement, the sensor provides data to external
equipment, showing the current concentration of the specified gas.
Data is output digitally via the UART port or as an analog signal
(0.5V to 2.5V) from pin 3 of the interface connector. The sensor
module can be calibrated for different operations and gases.
If the DigiPID sensor is connected to RAE Systems equipment, you
can affix the sensor module directly to the equipment and then turn on
the instrument’s power supply. The sensor module runs normally. If
the other external equipment is not a RAE Systems product,
additional firmw are and software suppo rt is necess ary. RAE Systems
can provide essential information such as the handshaking protocol,
port setting, flow rating, etc.
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23.2 Sensor Module Calibration
The sensor module is calibrated before it leaves the factory. However,
you can also calibrate the sensor module. Allow it to warm up for two
hours before calibrating it. Calibration should be performed using
external equipment, using a two-point calibration for the 100 and
1000 ppm VOC sensor.
100 ppm and 1000 ppm range sensor module calibration. First
perform a zero gas calibration by applying fresh air to the sensor
module. If the module is configured for use with a pump, the fresh
air’s flow rate must be greater than the pump’s draw rate. A
calibration time of 1 minute is recommended. The other calibration
point requires exposure of the sensor to span gas. The span gas
concentration should be 10 ppm (for 100 ppm range) or 100 ppm (for
1000 ppm range) isobutylene, and calibration time is also 1 minute.
IMPORTANT!
Whenever you change the sensor head while the instrument is in
operation, follow this procedure:
Press and hold [+] until the screen says:
Change Sensor
Press [+]. The RAEGuard 2 performs a full startup.
If you leave the sensor head detached from the RAEGuard 2 for
more than 60 seconds, it goes into alarm and displays this message:
Sensor Fail:0
Replace the sensor head and follow the procedure above for
restarting it.
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23.3 Maintenance A nd Calibration
The sensor module should be calibrated if it does not pass a bump
test, but no less than every 6 months, depending on use and exposure
to gas and contamination.
23.4 Replacing the Lamp And Filter
The sensor module is shipped with the lamp, sensor, and stainlessfilter installed. Periodically check the filter for dirt and contamination,
which can impact the reading and response time.
Note: Always turn off power to the DigiPID before checking and
servicing any parts. After inspection and/or replacement of parts,
recalibra te th e instrument.
The lamp and sensor are not interchangeable with parts from other
manufacturers; use only RAE Systems replacements. Use of nonRAE Systems components will void the warranty and can
compromise the safe performance of this product.
Loosening the
fastening nut
allows the DigiPID
to be easily
detached from a
base.
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Housing
Teflon O-ring
PID Lamp
Sensor
Module
Attachment
ring
IMPORTANT!
Only handle lamp
by holding sides of
end. Do not touch
flat surface.
Filter
IMPORTANT!
Align hole in filter
with hole in top of
PID sensor to
ensure
unobstructed
sample flow
Inlet/Outlet
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24 Replacing The S ensor’s Teflon UV Shield
On the underside of the sensor module is a Teflon UV Shield that
should be replaced every 90 days, in order to ensure sensor accuracy.
1. Dism antle the DigiPID as shown on page 70, and remove the
Sensor Module. Note: B e careful to not touch the PID lamp’s
surface.
2. Remove the Sensor Module, and replace it with a new one (a
spare Sensor Module is included with the unit).
3. Take the old Sensor Module to your shop/service center to
perform the rest of the activities, which will refresh the Sensor
Module and make it ready as a replacement spare.
Note: Teflon UV Shields are available from RAE Systems in
packages of 10 (P/N: C01-2017-000).
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4. Unscrew and remove all four of the gold-plated contact “legs”
from the Sensor Module.
5. Use a small flat-bladed screwdriver or similar tool to get between
the Sensor Module and the Teflon UV Shield at the point nearest
the shield’s large “notch,” and gently pry it up.
6. Work the blade or tool around the bottom of the Sensor Module,
lifting the Teflon UV Shield as you go around.
7. Once the Teflon UV Shield has been separated far enough from
the Sensor Module to remove it, use your fingers to pull it over
the four contact “legs” and discard it.
Sensor
Discard the used
Teflon Sheld
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8. Slide a new Teflon UV Shield over the contact “legs,” and gently
press it down until it is snug against the surface of the Sensor
Module.
9. Use your fingers to screw on the four contact “legs.”
10. Use a soft, clean cloth to wipe any finger oils from the surface of
the contact “legs,” and set the Sensor Module aside.
11. Inspect the surface of the PID lamp. Clean it with GC-Grade
methanol on a swab, as outlined in the next section.
12. After the surface of the PID lamp dries, reassemble the unit.
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25 Sensor & Lamp Cleaning/Replacement
Clean the PID sensor module, the lamp and housing only if:
1. The reading is inaccurate even after calibration.
2. The reading is very sensitive to air moisture.
3. A liquid has been sucked into the unit and damaged the unit.
Use of the external filter helps to prevent contamination of the sensor.
To access the sensor components and lamp, gently unscrew the sensor
cover. Then hold the PID sensor and pull it straight out. A slight,
gentle rocking motion helps release the sensor.
25.1 Cleaning The P ID Sensor
Place the entire PID Sensor Module into GC-grade methanol. It is
highly recommended that an ultrasound bath to be used to clean the
sensor for at least 15 minutes. Then dry the sensor thoroughly. Never
touch the electrodes of the sensor by hand.
Also use a methanol-soaked cotton swab to wipe off the lamp housing
where it contacts the sensor when the sensor is installed.
Turn over the sensor so that the pins poin t up and the sensor cavity is
visible. Examine the sensor electrodes for any corrosion, damage, or
bending out of alignment. The metal sensor electrode “fingers”
should be flat and straight. If necessary, carefully bend the sensor
fingers to ensure that they do not touch the Teflon portions and that
they are parallel to each other. Make sure that the nuts on the sensor
pins are snug but not overtight. If the sensor is corroded or otherwise
damaged, it should be replaced.
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25.2 Cleaning The Lamp Housing O r
Changing The Lamp
If the lamp does not turn on, the instrument will display an error
message to indicate replacement of the lamp may be required.
1. If the lamp is operational, clean the lamp window surface and the
lamp housing by wiping it with GC grade methanol using a cotton
swab using moderate pressure. After cleaning, hold the lamp up
to the light at an angle to detect any remaining film. Repeat the
process until the lamp window is clean. Never use water solutions
to clean the lamp. Dry the lamp and the lamp housing thoroughly
after cleaning.
CAUT ION: Never touch the windo w sur face with th e finger s
or anything else that may leave a film. Never use acetone or
aqueous solutions.
2. If the lamp does not turn on, remove the lamp from the lamp
housing. Place the lamp O-ring onto the new lamp. Insert the new
lamp, avoiding contact with the flat window surface.
3. Reinstall the PID sensor module.
4. Tighten the sensor cover.
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25.3 Cleaning The Instrument
Occasional cleaning with a soft cloth is recommended. Do not use
detergents or chemicals.
25.4 Ordering Replacement Parts
If you need replacement parts, contact your local RAE Systems
distribut or . A lis t is available online:
http://www.raesystems.com
In the U.S., you can order sensors, replacement batteries, and other
accessories online at:
http://istore.raesystems.com/
25.5 Special Servicing Note
If the instrument needs to be serviced, contact either:
1. The RAE Systems distributor from whom the instrument was
purchased; they will return the instrument on your behalf.
or
2. The RAE Systems Technical Service Department. Before
returning the instrument for service or repair, obtain a Returned
Material Authorization (RMA) number for proper tracking of
your equipment. This number needs to be on all documentation
and posted on the outside of the box in which the instrument is
returned for service or upgrade. Packages without RMA Numbers
will be refused at the factory .
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26 Electronic Waste Disposal
At the end of its life, this product must undergo separate
collection and recycling from general or household
waste.
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27 Technical Support
To contact RAE Systems Technical Support:
Monday through Friday, 7:00AM to 5:00PM Pacific (US) Time
Phone (toll-free): +1 888-723-4800
Phone: +1 408-952-8461
Email: tech@raesystems.com
28 RAE Sy stems Co ntac ts
RAE Systems by Honeywell
World Headquarters
3775 N. First St.
San Jose, CA 95134-1708 USA
Phone: +1 408.952.8200
Fax: +1 408.952.8480
E-mail: customerserv@raesystems.com
Web Site: www.raesystems.com
RAE Systems Technical Support
Monday through Friday, 7:00AM to 5:00PM Pacific Time
Phone: +1.408.952.8461
Email: tech@raesystems.com
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RAE Systems Europe ApS
Kirstinehøj 23 A
DK-2770 Kastrup
Denmark
Phone: +45 86 52 51 55
Fax: +45 86 52 51 77
orders@raeeurope.com
sales@raeeurope.com
service@raeeurope.com
Web: www.raesystems.eu
RAE Systems UK Ltd
D5 Culham Innovation Centre
Culham Science Centre
Abingdon, Oxon OX14 3DB
United Kingdom
Phone: +44 1865408368
Fax: +44 1235531119
Mobile: +44 7841362693
Email: raeuk@raeeurope.com
RAE Systems France
336, rue de la fée des eaux
69390 Vernaison
France
Phone: +33 4 78 46 16 65
Fax: +33 4 78 46 25 98
Email: info-france@raeeurope.com
Web: www.raesystems.fr
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RAE BeNeLux BV
Rijndal 20
2904 DC Capelle a/d IJssel
Phone: +31 10 4426149
Fax: +31 10 4426148
Email: info@rae.nl
Web: www.rae.nl
RAE Systems Spain, s.l.
Av. Remolar, 31
08820 El Prat de Llobregat
Spain
Phone: +34 933 788 352
Fax: +34 933 788 353
Mobile: +34 687 491 106
Email: mdelgado@raespain.com
Web: www.raespain.com
RAE Systems Middle East
LOB 7, Ground Floor, Office 19,
Jebel Ali Free Zone
Dubai, United Arab Emirates
Phone: +971.4.887.5562
Email: mesales@raesystems.com
RAE Systems (Hong Kong) Ltd.
Room 8, 6/F, Hong Leong Plaza
33 Lok Yip Road
Fanling, N.T, Hong Kong
Phone: +852.2669.0828
Fax: +852.2669.0803
Email:
hksales@raesystems.com
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RAE Systems Japan
403 Plaza Ochanomizu Bldg. 2-1
Surugadai Kanda Chiyoda-Ku
Tokyo, Japan
Phone: 81-3-5283-3268
Fax: 81-3-5283-3275
Email: jpsales@raesystems.com
RAE Systems Korea
#1010, DaeMyungAnsVill First,
Sang-Dong 412-2, Wonmi-Gu, Bucheon,
Kyungki-Do, Korea
Phone: 82-32-328-7123
Fax: 82-32-328-7127
Email: krsales@raesystems.com
Page 88
RAE Systems by Honeywell
World Headquarters
3775 N. First St.
San Jose, CA 95134-1708 USA
Phone: 408.952.8200
Toll-Free: 888.723.4800
Fax: 408.952.8480
E-mail (sales support): raesales@raesystems.com
Web Site: www.raesystems.com
Technical Support
Phone: 408.952.8461 (Mon-Fri, 7AM-5PM, PST)
Email: tech@raesystems.com
Product Registration
www.raesystems.com/support/product-registration
RAE Systems Europe
Kirstinehøj 23A, DK-2770 Kastrup • Denmark
Tel: +45.8652.5155 • Fax: +45.8652.5177
Web: www.raesystems.eu • Email: sales@raeeurope.com
RAE Systems (Hong Kong) Ltd.
Units 1516-18, 15/F, Delt a H ouse, 3 On Yiu Street
Shatin, N.T. Hong Kong
Web: www.raesystems.hk • Email: asiasales@raesystems.com
Phone: +852.2669.08 28
RAE Systems Middle East
LOB 7, Ground Floor, Office 19, Jebel Ali Free Zone
Dubai, United Arab Em irates
Email: mesales@raesystems.com • Phone: +971.4.887.5562
P/N D03-4001-000 Rev D April 2012
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