3.2.1 Air Supply..........................................................................................................................................................................6
3.2.2 Power Supply.....................................................................................................................................................................6
5.2.1 Advance/Exit Maintenance Menu .....................................................................................................................................11
5.2.2 Zero Adjust......................................................................................................................................................................11
5.2.3 Gas Span Calibration.......................................................................................................................................................12
5.2.4 Alarm Set Points..............................................................................................................................................................14
The PID-G
air systems utilizing a photoionization sensor. Hydrocarbons (HC) are limited to gases with an ionization potential of 10.6 eV
or less. See Appendix A for a list of gases and IPs. The PID-G
Groups B, C, D classified area and C
Features of the PID-G
N
OTE
: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the PID-G
service personnel and the commercial carrier involved immediately.
Regarding Damaged Shipments
UARD
is a compressed air monitoring instrument that measures and detects Hydrocarbons in industrial compressed
UARD
AN NOT
:
be installed in a hazardous location.
continuous monitoring of the sample air
continuous LCD display of gas and vapor concentrations
menu driven operational and maintenance controls
menu driven calibration procedure
audio and visual alarms indicate unsafe conditions
alarm relay contacts available on terminals
a fault relay and visual fault alarm
low air flow fault indication and display
alarm acknowledgement capability including audio defeat
mA outputs for target gas
UARD
and examine it for shipping damage. If such damage is observed, notify both ENMET customer
UARD
is NOT in an enclosure rated for use in a Class I, Div 1,
N
OTE
: It is your responsibility to follow these instructions. If they are not followed, the carrier will not honor
any claims for damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in
good condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
If your shipment arrives damaged:
•Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and
request immediate inspection of the carton and the contents.
•After the inspection and after you have received written acknowledgment of the damage from the carrier, contact
ENMET Customer Service for return authorization and further instructions. Have your Purchase Order and Sales Order
numbers available.
ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage,
usually $100.00. Repair or replacement charges above that value are your company’s responsibility.
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the shipping
company when asked to do so in writing by our customer. If you need your shipments insured, please forward a written
request to ENMET Customer Service.
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days of
receipt at the following address:
ENMET Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270 734-761-3220 Fax
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the PID-G
G
UARD
is labeled with its target gas.If there are accessories on the order, ascertain that they are present. Check the contents of
calibration kits. Notify ENMET customer service personnel of any discrepancy immediately.
UARD
is received as ordered. Each PID-
1.3 Serial Numbers
Each PID-G
UARD
is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
1
PID-G
UARD
ENMET Corporation
2.0 Components of the PID-G
2.1 PID-G
UARD
elements
UARD
See Figure 1 for location of elements:
FeatureDescriptionEnclosureA polycarbonate box, approximately 7 x 5 x 3, with a detachable front cover.
4 holes for mounting the enclosure to a vertical surface. Located at the corners of the bottom
of the enclosure, directly beneath the 4 front cover retaining screws. See Figure 3
Input PortThe entrance for the air sample and calibration gas. The quick release fitting mates with one
on the optional Sample air hose and the calibration adapter.
Front Cover
Detachable front cover of PID-G
UARD
with Display Panel. See Section 2.2 and Figure 1
There are 4 Screws that hold the front cover in place.
Sample Air Hose
(Optional)
Regulator
(Optional)
A five foot long hose to conduct a sample of the air from the source to the instrument.
The hose has a Female quick release fitting and regulator. See Figure 1a
To connect to the compressed air line. Sample pressure to the PID-G
55
PSI
. See Figure 1a
UARD
should be set to
Output PortSampled air out: Luer connection provided to connect to tubing
2.2 PID-G
UARD
Operational Features
The Display Panel is attached by a cable and is released by unscrewing the 4 screws located in the corners. After releasing the
panel, it is swung upward, exposing the interior of the enclosure. See Figure 1 for location of features.
FeatureDescription
DisplayA single line, 8 character LCD with backlight. Indicates the level of gas detected by sensor.
The numerical value of gas concentration and other information is displayed.
Audio Alarm(Horn)Audio alarm (105 dB at 30cm/12in). The audio alarm is on when the unit is in alarm.
Visual Indicators and
Alarms
LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator LED, Red
Membrane Switches2 Pushbutton Switches on front panel control the instrument maintenance functions. The
pushbutton switch locations are indicated by:
M
ENU
↓: Advances the instrument display through operation information and maintenance
menus
S
ELECT
: Disables audio alarm temporally and
Selects the maintenance menu operations such as, Zero, Span, Exit menu or sets
proper calibration values for Zero or Span
See Section 4.0 and 5.0 for operational and maintenance flow charts.
FlowmeterA flow indicator located at the output of the sample flow stream, which indicates
quantitatively the flow of sample air or calibration gas through the instrument.
Three alarm points are preprogrammed into the PID-G
UARD
. At each alarm point, an LED on the front panel is activated.
These internal alarm settings are independent of the 4-20mA output alarm values that can be set at a controller. An optional
relay board is available that will activate 0.5 Amp relay contacts at each alarm point, plus a fault relay.
2
PID-G
Regulator
¼“ NPT
Input Port
Strain Relief
Power/Fault
Menu
UARD
ENMET Corporation
Visual Indicator
Flowmeter
Select
Figure 1: External PID-G
UARD
Visual Indicators:
Alarm1, Alarm2, Alarm3
Output Port
Pushbutton Switches
Audio Alarm
Front Cover
Retaining Screws
4 places
Features
Figure 1a: Optional R
Female Quick Release
Fitting to Inlet Port
EGULATOR AND SAMPLE AIR HOSE
3
PID-G
PCB/Sensor Manifold
4-20mA Output
UARD
ENMET Corporation
2.3 Circuit Board Features
The Display Panel is attached by a cable and is released by unscrewing the 4 screws located in the corners. After releasing the
panel, it is swung upward, exposing the interior of the enclosure. The Circuit Board is mounted at the back surface of the
enclosure interior. Features are shown in Figure 2.
FeatureDescriptionRelay TerminalsThis group of terminals is located on the Circuit Board.
For the contacts for each of three alarm relays, and for the contacts of a fault relay.
See Section 3.2.2
Output TerminalsFor the 4-20 mA output.PCB/Sensor ManifoldThe PCB/Sensor manifold. The photoionization sensor located under this housing.
Terminal J12
External Power
Figure 2: PID-G
UARD
Circuit Board Features
Relay Terminals
J14, J15, J16, J17
Relays
K1, K2, K3, K4
4
PID-G
Right Side View
UARD
3.0 Installation
The PID-G
being used. The PID-G
UARD
should be located near the pipe or tank containing the air to be monitored, and upstream from where the air is
ENMET Corporation
UARD
must be installed such that it samples the compressed air before it reaches the users.
3.1 Mounting PID-G
Mount the PID-G
UARD
UARD
instrument on an appropriate vertical surface, leaving room for lid to be opened, using the mounting
holes provided. Avoid areas with excessive vibration or temperature extremes. The holes in the bottom of the enclosure are
0.18 inch in diameter and form a 6.44″ x 4.47″ rectangle. See Figure 3
It is recommended to use #8 drywall anchors and screws for mounting the PID-G
UARD
to a drywall/sheetrock surface.
Cover Inside View
Opened Upward
Attached to Base
Dimensions are in inches.
Figure 3: Mounting PID-G
5
UARD
PID-G
UARD
3.2 Wiring the PID-G
UARD
ENMET Corporation
The electrical installation should conform to appropriate electrical codes, such as the National Electrical Code in the United
States.
W
ARNING
:
The compliance of the installation to appropriate codes is not ENMET’s responsibility.
The PID-G
UARD
should be powered through circuit breakers provided for this purpose.
3.2.1 Air Supply
Tap the pipe or tank containing the air and use appropriate fittings to connect the sample input hose. The instrument is
designed to operate from an air supply pressure 55
PSIG
. The sample input hose length should be as short as possible.
3.2.2 Power Supply
The input power can vary from 100 to 240 VAC, 50/60 Hz. Power should be connected to the Power Input Terminal TB1 and
the Ground screw. See Figure 4 for location.
W
ARNING
:
Continuous gas detection and alarm systems (110VAC/220VAC / 24VDC/12VDC powered) become inoperative
upon loss of primary power. Contact factory for specifications and pricing of backup battery systems.
Upon supplying air and power to the PID-G
UARD
:
The green power on LED is lit.
The display backlight is lit, and instrument will step through a start-up sequence: unit serial number and software revision
may be shown on the display.
The instrument may go into alarm briefly, but the sensors stabilize quickly. If the instrument persists in alarm, acknowledge the
alarm by pressing the S
ELECT
button. If alarm persists longer than 30 minutes, call ENMET customer service personnel.
For DC wiring 24Vdc may be wired to J12, (J12-1)position 1 + with ground connected to (J12-2)position 2.
AC Power Supply Terminal: TB1
Label on PCBFunction
110V
AC
Ground
TB1 ACNNeutral
TB1 ACLLine
AC GND
Cover Inside View
Opened Upward
Attached to Base
Screw
220V
AC
TB1 ACNNeutral
OptionalTB1 ACLLine
Ground
AC GND
Screw
DC Power Supply Terminal: J12
PositionFunction
1 +24 V
2GND
34 - 20 mA out
DC
power
Figure 4: Power Terminal Connections PID-G
UARD
6
PID-G
UARD
ENMET Corporation
3.2.3 Relay Contacts
Relay contacts are available for each alarm; these are SPDT, rated at 10Amp at 110VAC, and may be latching or non-latching
as required by the application.
They are accessed on the terminals next to each relay see Figure 5. The contact positions are noted on the circuit board next to
each terminal.
The following table is for the relays in their un-energized state. This is also the alarm condition state. Non-failsafe configured
relays in the alarm state, are the reverse of the PC board labeling. Note that the Fault(FLT) relay cannot be set to operate in a
Non-Failsafe mode. Please see Table 1 below:
These relay contacts can be used to operate auxiliary alarms or other functions. Auxiliary alarms should be powered from an
independent power source separate form the instrument power to avoid alarm failure due to controller malfunction. Use the
existing hole in the enclosure for a wire exit, and use appropriate cable fittings. See Figure 2. Be sure to note the location and
depth of hardware inside the enclosure.
Relay Terminals
J14, J15, J16, J17
Relays
K1, K2, K3, K4
Figure 5: Relay Terminal Connections PID-G
7
UARD
PID-G
PID-G
UARD
302
- 20
0 ppm
UARD
4.0 Operation
When the PID-G
and the information on the display is measurement of hydrocarbon detected by the PID-G
are not lit.
UARD
is installed as described in Section 3, and in clean air, the POWER green LED is on, the display is lit
ENMET Corporation
UARD
. The red alarm and fault LEDs
4.1 Start Up PID-G
When the PID-G
number, serial number and software revision. After all of the momentary screens have been displayed, the instrument arrives at
the Main Gas Display showing the gas concentration and unit of measurement.
Depending on instrument configuration and calibration condition, the furthest right character in the display may flash a letter
indicating the instrument status. See the Section 4.1.1 below
UARD
UARD
is first powered up, it goes through a series of momentary screens, which identify the instrument model
4.1.1 Typical Start Up
When power is supplied to the PID-G
Typical start up sequence of information displayed.
Example of Typical Start Up DisplayFunction
S/W 6.5F
IF the right most character is a flashing WThe instrument is in Warm-up mode
0 ppW
UARD
, the instrument will display the following sequence of information:
The instrument: Model PID-G
The instrument: Serial Number
The instrument: Software Revision
This should last about 1 minute
The Signal Output is held at 4mA during warm-up
UARD
IF the right most character is a flashing CThe instrument has failed Calibration
0 ppC
N
OTE
:
Software revision may cause variations of display output.
The last good calibration values are retained, but the sensor
may not be responsive to gas
A new Calibration should be performed As Soon As Possible
The instrument: Normal Display Mode
Measurement of Carbon Monoxide
8
PID-G
UARD
4.2 Normal Display Mode
When the PID-G
and the information on the display is measurement of hydrocarbon detected by the PID-G
are not lit.
To advance through displays of operational information press the M
Example sequence of operational information below:
UARD
is installed as described in section 3, and in clean air, the POWER green LED is on, the display is lit
ENU
button.
ENMET Corporation
UARD
. The red alarm and fault LEDs
Display Measurement of Hydrocarbon
Press M
ENU
button
Display indicates Alarm 1 Set point
Press M
ENU
button
Display indicates Alarm 2 Set point
Press M
ENU
button
Display indicates Alarm 3 Set point
Press M
ENU
button
Display indicates mA Span range
(Full Scale)
Press M
ENU
button
0 ppm
M
ENU
A1:05
M
ENU
A2:10
M
ENU
A3:20
M
ENU
mA:50
M
ENU
S
ELECT
S
ELECT
S
S
S
ELECT
ELECT
ELECT
Display returns to Hydrocarbon measurent
Operational Display Flow Chart
4.2.1 Alarm Conditions PID-G
There are three alarm set points for CO. The factory settings of these alarm set points are shown in Table 2.
UARD
Table 2: Factory Alarm Set Points
GasAlarm 1Alarm 2Alarm 3
Hydrocarbon51050
These alarm set points can be changed within limits; see the maintenance section of this manual for the procedure.
If the gas concentration increases above that of the alarm set point, the associated red LED is lit, the associated relay changes
state, and the audio alarm is activated.
Pressing the S
ELECT
button can temporally disable the Audio Alarm. The horn will be disabled for about five minutes. If a
second alarm condition occurs during this time the horn will re-activate. If the alarm condition(s) have ended during this time
the horn will not re-activate.
4.3 Hydrocarbon Sensor Response
Hydrocarbon (HC) sensor is designed to detect hydrocarbon gases and vapors with an ionization potential (IP) of 10.6 eV or
less. Hydrocarbons with an IP of greater then 10.6 eV will NOT be detected. Please see Appendix A for a list of common
gases and vapors and their respective IP rating.
Unless otherwise noted Isobutylene is used as a calibration and reference gas.
9
PID-G
5ppm
Exit
UARD
ENMET Corporation
5.0 Maintenance
The PID-G
access code is set at the factory and may be changed by following the access code menu explained in section 5.5.
5.1 Maintenance Menus
C
AUTION
Pushbutton switches control the M
display panel, see Figure 3. The M
numbers such as alarm points, calibrations gas, etc. The S
To enter the maintenance menu press and hold the MTable 3 indicates the maintenance menu sequence see Figure 7 for a detailed maintenance menu flow chart.
UARD
maintenance menus that are accessed by pressing the M
ENU
button and entering a valid access code. The
: Do Not Attempt A Span Procedure Without Calibration Gas Applied to The Sensor; if this is done, the instrument is
forced into a calibration fault mode.
ENU
and S
ELECT
functions. The M
ENU
button is used to display the various menu options and make incremental changes to
ELECT
ENU
button for 2 to 4 seconds
ENU
and S
ELECT
button locations are indicated on the
button is used to select that option, set zero or span digit.
Table 3: PID-G
UARD
Maintenance Menus Sequence
Example of DisplayFunction
Measurement of target gas
Normal Display Mode
Press and hold the M
ENU
button for 2 – 4 seconds to enter the Maintenance Menu
The Power/Fault LED will flash Green – Red to indicate the PID-G
To exit the maintenance Menu and return to the
Normal Display Mode:
If intended function Press S
Press the M
ENU
button to advance to the Zero procedure
For adjusting Zero:
Zero
Press the M
ENU
button to advance to the Span procedure
If intended function Press S
For adjusting the Span:
Span
Calibration of PID-G
If intended function Press S
Press the M
ENU
Alarm1
button to advance to each Alarm set point procedures
For adjusting the Alarm 1, 2 and 3 set points:
If Intended function Press S
Alarm2
Alarm3
UARD
is in Maintenance Mode
ELECT
ELECT
UARD
ELECT
ELECT
button
button
button
button
Press the M
ENU
mA Span
Pressing the M
You must Press the S
ENU
button without pressing the S
button to advance the mA Span set point procedure
For adjusting the mA Span set point:
If intended function Press S
ELECT
button will allow you to cycle through the menu options.
ELECT
button in order to initiate the desired operation.
10
ELECT
button
PID-G
Zero
Cal OK
will display Bad Zero and return to
Bad ZERO
PV:
0
Zero
H
M
Abort?
UARD
ENMET Corporation
5.2 PID-G
Pushbutton switches control the M
display panel, see Figure 3. The M
numbers such as alarm points, calibrations gas, etc. The S
To enter the maintenance menu press and hold the M
UARD
Maintenance Adjustments
ENU
ENU
and S
ELECT
functions. The M
ENU
and S
ELECT
button locations are indicated on the
button is used to display the various menu options and make incremental changes to
ELECT
button is used to select that option, set zero or span digit.
ENU
button for 2 to 4 seconds
Table 3 indicates the maintenance menu sequence see Figure 7 for a detailed maintenance menu flow chart.
5.2.1 Advance/Exit Maintenance Menu
To advance to the next sequence in the maintenance menu cycle, when Exit appears on the display, press the M
Exit maintenance, by pressing the Exit appears on the display. Press the S
ELECT
button to return to the instrument Normal Gas
Display.
Example of Exit menu:
S
ELECT
Exit
M
ENU
Press the M
Press the S
ENU
button to advance through Maintenance Menus cycle
ELECT
button to return to the Normal Gas Display.
5.2.2 Zero Adjust
The ZERO function must be performed by exposing the PID-G
question, use a cylinder of 20.9% oxygen to provide a clean air reference.
Enter the maintenance menu by pressing and holding M
ENU
Menu flow chart.
After entering the maintenance menu, Press the M
Press the S
ELECT
button to perform a Zero.
ENU
button until the Zero menu is displayed.
The display will alternate between Zero and PV: To abort Zero function press and hold M
Abort? will appear, press S
Press the S
ELECT
button to initiate a Zero adjustment.
ELECT
button to return to Zero.
An auto detect sequence is initiated. After 15 seconds, the PID-G
If the reading stabilizes, within the pre-programmed perimeters, an automatic zero adjustment will be made.
Cal OK appears on the display and in 1 – 2 seconds, display will change to Span.
If you wish to Span the sensor press the S
If you wish to Exit the maintenance menu, press M
ELECT
button you are now ready to apply gas. Proceed to gas span step 2
ENU
the instrument Normal Gas Display
UARD
instrument to clean fresh air. If the air at the sensor is in
button for 2 to 4 seconds. See Figure 7, PID-G
ENU
button for 3 – 4 seconds,
UARD
will monitor the zero reading for stability.
button until Exit is displayed, then press S
ENU
UARD
ELECT
button to return to
button.
Maintenance
If the reading does not stabilize, within 255 seconds, the procedure will be aborted. Sensor is outside of safe parameters to
be zeroed, the display will read Bad Zero. Repeat Section 5.2.2 Zero Adjust making sure to use a Zero gas of 20.9%
Oxygen. ENMET part number 03296-209.
Note: You can Press and
M
ENU
When Abort? appears press S
OLD
S
ELECT
the
ENU
button to abort Zero
ELECT
button to
return to Zero menu
Example of Zero adjustment display:
S
M
ELECT
ENU
OR
S
ELECT
Press the S
If the Zero signal is within Preset Specs the
display Cal OK momentarily then advance to Span menu
If the Zero signal is not within Preset Specs the
ELECT
button to force Zero adjustment
PID-G
Zero menu
PID-G
UARD
will
UARD
11
PID-G
Menu
Select
UARD
ENMET Corporation
5.2.3 Gas Span Calibration
It is recommended that the Zero Function be performed first.
Do not perform a calibration unless span gas is applied to sensor. Calibration can be aborted by pressing and holding the M
button for 3 – 4 seconds.
Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. The Zero function sets
the clean air reference point and the Span function sets the sensitivity of the instrument.
Initial Calibration: Wait 3 – 4 hours after initially supplying power to the PID-G
The PID-G
UARD
has been precalibrated at the factory, and initial field calibration should result in only fine tuning to circuit, as
well as a way to check that installation is successful. It is not necessary to open the enclosure to make adjustment. The
calibration functions are operated with pushbuttons from outside the enclosure through the
Calibration Zero and Span functions are two separate procedures. They operate independently of each other. It is
recommended that the Zero procedure be done prior to the Span procedure.
UARD
instrument before initial calibration.
MENU
and
SELECT
switches.
ENU
ENMETCorporation recommends at least quarterly calibration of the PID-G
Calibration equipment is available from ENMET Corporation to calibrate the PID-G
UARD
instrument.
UARD
instrument.
•Calibration adapter, a length of tubing with a regulator for the gas cylinder on one end, and a quick release fitting to connect
to the sample input of the PID-G
UARD
on the other.
•Gas cylinder, Zero gas 20.9% oxygen or Span gas, typically 10ppm Isobutylene
Generally, a cylinder of 20.9% Oxygen is used to provide a Zero point or fresh air reference for the calibration.
A cylinder of calibration gas is used to provide the Span reference point for calibration. Calibration and Span point varies
depending on target gas and range of instrument, if necessary see special calibration addendum.
Output Port Fitting
Input Port Fitting
Calibration adapter
Gas Cylinder
Figure 6: Calibration Adapter
12
PID-G
H
S
Abort?
20
PV:
0
20
Apply
Cal Gas until signal value becomes stable
Cal OK
Span
PV:
0
Same mV
Bad Sens
UARD
ENMET Corporation
Enter the maintenance menu. See Figure 7, PID-G
1. Press the M
2. Press the S
ENU
button until Span display.
ELECT
button to perform a Span procedure.
UARD
Maintenance Menu flow chart.
The display will alternate between the calibration gas concentration (Cal 20) and a signal level (PV).
To Abort calibration press and Hold M
ENU
button for 3 – 4 seconds, Abort? will appear, press S
ELECT
button to return to
Span.
To change calibration gas level to be used, press and Hold S
ELECT
button for 3 – 4 seconds, use menu button to change
digit and select button to move to next digit.
3. Attach the associated calibration gas cylinder to the calibration adapter. See Figure 6 calibration adapter.
4. Open the valve to apply the calibration gas to the sensor.
An auto detect sequence is initiated after 30 seconds, the PID-G
UARD
will monitor the cal reading for stability.
5. Watch for the signal level to stabilize. 1 – 4 minutes.
6. Once the signal level has stabilized,
If the Span is successful, Cal OK appears momentarily, then will advance to Alarm1 menu.
If the sensor is outside of acceptable parameters, Bad Span is displayed.
If the sensor did not respond, an incompatible span gas was applied and the sensor did not respond at all,
Same mV is displayed then will return to Span.
If calibration is not successful, it is suggested that calibration be attempted again in 30-60 minutes.
If the sensor will not calibrate See Section 5.4.
7. Remove the calibration gas.
8. Calibration is complete.
Note: The instrument will return to operation mode in 3 – 5 seconds.
9. Press the M
ENU
button to advance to next desired menu
N
OTE
M
ENU
:
To abort calibration or change calibration gas level.
You can Press and H
When Abort? appears press S
OLD
the M
S
ELECT
ENU
button to abort Calibration
ELECT
button to advance to
Alarm1 menu
Example of Calibration Display:
S
ELECT
M
ENU
S
ELECT
OR
OR
S
ELECT
You can Press and
Calibration Gas Level
-Use the M
-Use the S
S
ELECT
ENU
ELECT
OLD
the
ELECT
button to change the
button to change digits
button to move to next digit
(about 1 to 4 minutes) See Figure 7
When cal signal is stable PID-G
UARD
will automatically update:
If cal is good display will indicate OK or Same and advance to
Alarm1
If cal is not within preset “range” display will indicate Bad Sens
or Same mV The PID-G
To exit press M
ENU
button until Exit appears and press S
UARD
will return to the Span Menu
ELECT
13
PID-G
Alarm1
Alarm2
Alarm3
0
020
0
005
0005
0
010
0010
mA Span
0050
UARD
5.2.4 Alarm Set Points
The PID-G
To change any of the three alarm points:
Enter the maintenance menu as shown in Figure 7PID-G
1. Press the M
2. Press the S
3. Press the M
4. Press the S
5. Press the M
Example of Alarm Set Point menus:
UARD
alarm set points can be changed within limits.
ENU
button until to display Alarm1 is displayed.
ELECT
button to initiate alarm set point change
ENU
button to change the digit indicated by the underscore cursor
ELECT
button to move the cursor to the next digit
When last digit is entered the PID-G
ENU
button to advance to the next menu
S
ELECT
M
ENU
S
ELECT
M
ENU
S
ELECT
UARD
UARD
Maintenance Menu flow chart.
will advance to the next menu
To change Alarm set points:
Press Menu button until Alarm to be changed is displayed
Press Select button to display the set point
The M
ENU
button changes digit indicated by underscore
cursor
The S
ELECT
button locks underscored digit and moves to
next digit
If change is not within range display returns to first digit
If change is within range display moves to next menu
ENMET Corporation
M
ENU
5.2.5 Span Set
The PID-G
To change the span range:
Enter the maintenance menu as shown in Figure 7PID-G
1. Press the M
2. Press the S
3. Press the M
4. Press the S
5. Press the M
Example of mA Span menu:
Default mA Span
4mA20mA
0 ppm50 ppm
UARD
4-20mA output full scale span range can be changed within limits.
ENU
button until to display Span is displayed.
ELECT
button to initiate the mA Span menu
ENU
button to change the digit indicated by the underscore cursor
ELECT
button to move the cursor to the next digit
When last digit is entered the PID-G
ENU
button to advance to the next menu
S
ELECT
M
ENU
UARD
will advance to the next menu
To change mA Span set points:
Press Menu button until mA Span is displayed
Press Select button to display the set point
The M
The S
UARD
Maintenance Menu flow chart.
ENU
button changes digit indicated by underscore cursor
ELECT
button locks underscored digit and moves to next digit
14
PID-G
PV:
0
20
Apply
Cal Gas until signal value becomes stable
Cal OK
Same mV
Bad Sens
Span
You can Press and
H
the
S
button to
Alarm1
Alarm2
Alarm3
0
020
0
005
0005
0
010
0010
See Section 5.2.4
mA Span
0050
See Section 5.2.5
To
return to Normal Gas Display:
Zero
Cal OK
display Bad ZERO
Bad ZERO
PID-G
display Cal OK,
See Section 5.2.2
PV:
0
UARD
Normal Gas Display
5ppm
M
Exit
M
ENU
ENU
Press and H
S
ELECT
Press the M
S
ELECT
OLD
the M
ENU
button for 2 – 4 seconds to enter the Maintenance Menus
Press the S
ENU
button to advance through Maintenance Menus cycle
ELECT
button to return to the Normal Gas Display. See Section 5.2.1
S
ELECT
Press the S
ELECT
button to initiate Zero adjustment
ENMET Corporation
M
M
M
M
ENU
ENU
ENU
ENU
S
ELECT
S
S
S
ELECT
OR
ELECT
ELECT
S
ELECT
OR
OR
If the Zero signal is within Preset Specs the
If the Zero signal is not within Preset Specs the
S
ELECT
OLD
ELECT
UARD
PID-G
change the Calibration Gas Level
See Section 5.2.3
(about 1 to 4 minutes) See Figure 6
Press S
ELECT
to enter the cal signal:
If cal is good display will indicate OK or Same
If cal is not within preset “range” display will
indicate Bad Sens
To change Alarm set points:
Press Menu button until Alarm to be changed is displayed
Press Select button to display the set point
The M
ENU
button changes digit indicated by underscore
cursor
The S
ELECT
button locks underscored digit and moves to
next digit
If change is not within range display returns to first digit
If change is within range display moves to next menu
will
UARD
will
M
ENU
S
ELECT
M
ENU
Press M
Then press S
ENU
button until EXIT is displayed
ELECT
button
F
IGURE
7: PID-G
To change mA Span set point:
Press Menu button until mA Span is displayed
Press Select button to display the set point
The M
ENU
button changes digit indicated by underscore cursor
The S
ELECT
button locks underscored digit and moves to next digit
UARD
Maintenance Menu Flow Chart
15
PID-G
PCB/Sensor
Cover Inside View
UARD
ENMET Corporation
5.4 Sensor Replacement
W
ARNING
:
Power must be removed from the PID-G
UARD
before this or any internal procedure. Failure to do so may cause
damage to equipment, bodily injury or death.
Sensors should be replaced when they can no longer be calibrated. Replacement sensor part numbers are listed in Section 6.0
of this manual. If you do not know the proper part number for your sensor, have the PID-G
UARD
serial number available when
contacting your Distributor or ENMET Corporation Technical Support.
Remove, the 4 retaining screws from PID-G
UARD
lid and 2 retaining screws form sensor manifold, see Figure 6
Remove, the sensor assembly from the PCB/sensor manifold, see Figure 8.
Insert, the new sensor assembly and replace sensor manifold and 2 retaining screws.
Replace, lid and the 4 retaining screws.
Re-supply power to the PID-G
Opened Upward
Attached to Base
UARD
Manifold
Figure 8: PID-G
UARD
Sensor Replacement
After the new sensor assembly has been installed, it is suggested to allow the sensor to stabilize for 3 – 4 hours.
A Factory calibration must be performed.
After entering the Maintenance menu, press and hold the M
ENU
button for 2-4 seconds while viewing the Zero menu.
After 2-4 seconds, an F will appear on the far right hand side of the display. The F indicates that the instrument is in Factory
mode.
Perform the calibration Zero and Span procedures as outlined in Section 5.2. Be sure that the F is present when selecting the
Zero and Span functions.
The Factory calibration sets a calibration window for future standard instrument calibrations.
Calibration Gas, Consult ENMET Distributor or ENMET Corp.
7.0 Technical Data and Specifications
ENMET Corporation
Electrical Power
Storage and Transport
Operation
Mechanical
Outputs
15 Amp fused branch circuit
100-240 V
0.45A, 50/60 Hz
0.6A, 24V
Temperature:
preferred
Relative Humidity10-99% RH, non-condensing
Atmospheric Pressure20 to 36 inHg (68 to 133 kPa)
Temperature:
Relative Humidity10-99% RH, non-condensing
Atmospheric Pressure20 to 36 inHg (68 to 133 kPa)
Dimensions:7.1 x 5.1 x 3 in(180x130x75mm)
Weight:2 lbs (0.9 kg)
Material:Polycarbonate
Strain relief:3-6.5mm OD
Relays:SPDT
Analog:4-20mA
Digital:RS-485-modbus
Audio:105 dB at 30cm/12in
AC
DC
-20° to +60°C (-4° to +140°F)
0° to +20°C (32° to 68°F)
0° to +40°C (32° to +104°F)
Resistive LoadInductive Load
10A at 110 VAC7.5A at 110 V
10A at 30 V
DC
5A at 30 V
DC
AC
N
OTE
: All specifications stated in this manual may change without notice.
17
PID-G
UARD
ENMET Corporation
8.0 WARRANTY
ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one
year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and
expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to
ENMET within the warranty period (transportation prepaid) for inspection. If the evaluation by ENMET confirms that the
product is defective, it will be repaired or replaced at no charge, within the stated limitations, and returned prepaid to any
location in the United States by the most economical means, e.g. Surface UPS/FedEx Ground. If an expedient means of
transportation is requested during the warranty period, the customer is responsible for the difference between the most
economical means and the expedient mode. ENMET shall not be liable for any loss or damage caused by the improper use of
the product. The purchaser indemnifies and saves harmless the company with respect to any loss or damages that may arise
through the use by the purchaser or others of this equipment.
This warranty is expressly given in lieu of all other warranties, either expressed or implied, including that of merchantability,
and all other obligations or liabilities of ENMET which may arise in connection with this equipment. ENMET neither assumes
nor authorizes any representative or other person to assume for it any obligation or liability other than that which is set forth
herein.
NOTE: When returning an instrument to the factory for service:
Be sure to include paperwork.
A purchase order, return address and telephone number will assist in the expedient repair and return of your unit.
Include any specific instructions.
For warranty service, include date of purchase
If you require an estimate, please contact ENMET Corporation.
There are Return for Repair Instructions and Form on the last pages of this manual. This Form can be copied or used as needed.
PO Box 979
680 Fairfield Court
Ann Arbor, Michigan 48106-0979
734.761.1270 Fax 734.761.3220
Returning an Instrument for Repair
ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair
service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty
service work.
When returning an instrument to the factory or service center for service, paperwork must be included which
contains the following information:
A purchase order number or reference number.
A contact name with return address, telephone and fax numbers
Specific instructions regarding desired service or description
of the problems being encountered.
Date of original purchase and copy of packing slip or invoice
for warranty consideration.
If a price estimate is required, please note it accordingly and be
sure to include a fax number.
Providing the above information assists in the expedient repair and return of your unit.
Failure to provide this information can result in processing delays.
ENMET charges a one hour minimum billing for all approved repairs with additional time billed to the closest
tenth of an hour. All instruments sent to ENMET are subject to a minimum $30 evaluation fee, even if returned
unrepaired. Unclaimed instruments that ENMET has received without appropriate paperwork or attempts to
advise repair costs that have been unanswered, after a period of 60 days, may be disposed of or returned
unrepaired COD with the evaluation fee.
Service centers may have different rates or terms. Be sure to contact them for this information.
Repaired instruments are returned by UPS/FedEx Ground and are not insured unless otherwise
specified. If expedited shipping methods or insurance is required, it must be stated in your paperwork.
Note: Warranty of customer installed components.
If a component is purchased and installed in the field, and fails within the warranty term, it can be
returned to ENMET and will be replaced, free of charge, per ENMET’s returned goods procedure.
If the entire instrument is returned to ENMET Corporation with the defective item installed, the item will
be replaced at no cost, but the instrument will be subject to labor charges at half of the standard rate.
Repair Return Form
Mailing Address:
ENMET Corporation
PO Box 979
Ann Arbor, Michigan 48106
K UPS: K GroundK 3 Day SelectK Next Day AirK ND Air SaverK 2-Day Air
K Federal Express: K GroundK Express SaverK P-1K Standard K 2-Day Air
K FedEx Account number: ________________________
Would you like ENMET to insure the return shipment?
K NoK Yes Insurance Amount: $_________________
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