Delta Faucet DF-745 User Manual
NanoTrace
Moisture Analyzer
DF-745
EnterNextMenuESC
Instruction Manual
Firmware Version 3.1.5
DELTA F CORPORATION
4 Constitution Way, Woburn, MA 01801-1087
Telephone: (781) 935-4600 FAX: (781) 938-0531
P/N 99000041
082510
The Delta F Difference
Your NanoTrace Moisture Analyzer has been designed, manufactured and is
supported under the tightest of controls, thus helping to insure the highest
possible standards of quality.
Every analyzer that Delta F manufactures is tested and operated on a variety of
gas concentrations to insure that it functions properly when you receive it.
The certificate of calibration assures your analyzer has been calibrated on gases
that are traceable to NIST standards. With proper maintenance, your analyzer
should remain calibrated for years.
For a fast and successful startup, please read this manual carefully. There are
important cautions and a number of helpful hints to help you to optimize the
operation of your analyzer.
If you have questions, please do not hesitate to call the Delta F Service Line at
(781) 935-5808, use our Service FAX Line at (781) 932-0053 or e-mail us at
Service@Delta-F.com.
Copyright 2004 - 2010 by Delta F Corporation
No part of this publication may be reproduced, stored in a retrieval system or transmitted in
any form, or by any means including electronic, mechanical, photocopying, recording or
otherwise without prior written permission of Delta F Corporation.
NanoTrace Moisture Analyzer is a trademark of Delta F Corporation. VCR is a
registered trademark of the Cajon Company.
Read Me First…
Unpacking Procedure
Follow the procedure below to unpack your NanoTrace Moisture Analyzer
1. Examine the condition of the packaging and its contents. If any damage is
apparent, immediately notify the carrier and Delta F. Do not proceed with
the installation.
2. Check the contents against the packing slip to make sure the shipment is
complete. Unattached equipment may be shipped with the analyzer in
supplemental packaging. Shortages should be reported to Delta F
immediately.
3. All NanoTrace Moisture Analyzers are shipped with the following:
Item Delta F Part
Number
Power cord with 115 VAC connector
NOTE: No power cord is supplied with 220 VAC units
USB Memory Stick, Flash Drive (SONY USM512J) P/N 49600512
VCR Filter Gasket P/N 60300268
Aspirator P/N 14241410
Instruction Manual P/N 99000041
P/N 59017237
4. Open the analyzer door, remove any shipping materials and verify that
nothing has come loose during transit.
5. The analyzer is set at the factory to operate on 120 VAC or 240 VAC.
Examine the voltage indicator on the rear panel to verify that the voltage is
set as ordered.
6. Save the original container in the event you may need to ship the analyzer
to another location or back to the factory (see Shipping in the Service
section).
Installation and Maintenance
The NanoTrace Moisture Analyzer provides years of accurate and dependable
service if it is set up, operated and maintained properly. It is essential to make
a careful and complete installation as outlined in the Installation and Start Up
section of this manual. It is assumed that NanoTrace Moisture Analyzer users
are familiar with the techniques and precautions associated with Ultra-High
Purity (UHP) gas, its plumbing, and devices such as UHP regulators and gas
purifiers, and that the analyzer is used as designed and intended.
Unlike much UHP analytical equipment, NanoTrace Moisture Analyzer does
not require constant maintenance. However the maintenance intervals for zero
and span calibrations, must be determined and followed carefully.
Thank You
Thank you for selecting the NanoTrace Moisture Analyzer. Delta F designs,
manufactures, exhaustively tests, and supports every analyzer under the
tightest quality controls. You should expect every Delta F analyzer to arrive in
perfect working order and, with good maintenance, provide years of troublefree service. Please call the Service Phone Line at (781) 935-5808 if you need
assistance or if you have suggestions, or use our Service Fax Line at (781)
932-0053 or e-mail us at Service@Delta-F.com.
1 Table of Contents
1 Table of Contents ....................................................................1
1.1 Table of Figures...................................................................................................... 3
2 Cautions.................................................................................... 7
2.1 Symbols and Explanations......................................................................................7
2.2 Important Warnings ...............................................................................................7
3 Specifications ..........................................................................9
3.1 Moisture.................................................................................................................9
3.2 General................................................................................................................... 9
4 Installation, Start Up and Shut Down ................................... 13
4.1 Analyzer Installation ............................................................................................ 14
4.1.1 Vacuum Source ....................................................................................... 14
4.1.2 Pneumatic Pressure Line Connection - Optional ...................................... 15
4.1.3 Sample Gas Connections ......................................................................... 15
4.1.4 Electrical Connections ............................................................................. 17
4.1.5 Hydrogen Service Safety System .............................................................. 17
4.2 Analyzer Start Up................................................................................................. 19
4.2.1 Gas Delivery System ................................................................................ 19
4.2.2 Gas Pressure and Flow Settings ............................................................... 20
4.2.3 Download System Data............................................................................ 21
4.3 Analyzer Shut Down ............................................................................................21
5 Options ................................................................................... 25
5.1 Key Lock .............................................................................................................. 25
5.2 Operating Voltage ................................................................................................ 25
5.3 Serial Communications......................................................................................... 25
5.4 Analog Voltage Output.........................................................................................25
5.5 Hydrogen Service Safety System ...........................................................................25
5.6 Vacuum Pump...................................................................................................... 25
5.6.1 Installation of the Vacuum Pump ............................................................. 26
5.6.2 Moisture Sample Gas Outlet Connection to Vacuum Pump ...................... 28
5.6.3 Electrical Connections ............................................................................. 28
6 Connecting to External Devices ........................................... 31
6.1 Serial Communication Port – J5 ........................................................................... 31
6.2 Analog Signal Outputs – J4 ..................................................................................32
6.3 4-20 mA Outputs – J4........................................................................................... 32
6.4 Relay Ports – J8, J9............................................................................................... 33
7 User Interface ......................................................................... 35
7.1 Data Display Screen .............................................................................................35
7.2 Keypad ................................................................................................................. 35
7.3 Menu Structure..................................................................................................... 36
7.4 Main Menu........................................................................................................... 36
7.4.1 Isolate Analyzer – Optional ..................................................................... 37
7.4.2 Restore Sample Gas Flow – Optional ....................................................... 38
Table of Contents DF-745 1
7.4.3 Calibrate Menu........................................................................................ 38
7.4.4 Data History Routine ............................................................................... 42
7.4.5 Data Downloader Routine........................................................................ 44
7.4.6 View Logs Menu ..................................................................................... 46
7.4.7 Analyzer Setup ........................................................................................ 49
7.4.8 Analog Output Setup ............................................................................... 55
7.4.9 Graph Setup ............................................................................................ 56
7.4.10 Diagnostics Menu ................................................................................ 56
7.4.11 Adjust Contrast.................................................................................... 62
7.4.12 Power Up Default – Optional ............................................................... 63
7.4.13 Date/Time............................................................................................ 64
7.4.14 Communications.................................................................................. 65
7.4.15 Download System Data ........................................................................ 65
7.4.16 System Info.......................................................................................... 67
8 Sample Gas Preparation and Delivery................................. 69
8.1 Introduction.......................................................................................................... 69
8.2 Sample Flow Rate and Pressure ............................................................................ 69
8.3 Flow Rate Effects on Sensor Performance............................................................. 69
8.4 Sample Gas Scale Factor ...................................................................................... 69
8.4.1 Background Gas Effects on Indicated Flow Rate ...................................... 69
8.5 Flammable Sample Gas ........................................................................................ 70
9 Service.................................................................................... 71
9.1 Return Material Authorization number ................................................................. 71
9.2 Maintenance......................................................................................................... 71
9.2.1 Storage Conditions .................................................................................. 71
9.2.2 Moisture Cell Maintenance...................................................................... 71
9.2.3 Vacuum Pump Maintenance .................................................................... 71
9.3 Replaceable Parts List........................................................................................... 73
9.4 Troubleshooting the DF–745 NanoTrace Analyzer ............................................... 75
10 Theory of Operation .............................................................. 77
10.1 The Moisture Measurement................................................................................. 77
10.1.1 Moisture and the IR Spectrum.............................................................. 77
10.1.2 Absorption Spectroscopy...................................................................... 78
11 Safety...................................................................................... 79
11.1 General Warnings............................................................................................... 79
12 Warranty ................................................................................. 81
13 Index ....................................................................................... 83
14 Appendix A – User Menu Screens........................................ 85
15 Appendix B – Hydrogen Service Safety System................. 89
15.1 Instrument .......................................................................................................... 89
15.2 Vacuum Pump ....................................................................................................89
15.3 Installation.......................................................................................................... 89
15.4 Operation............................................................................................................ 90
2 DF-745 Table of Contents
1.1 Table of Figures
Figure 1: Overall View.............................................................................................................................. 11
Figure 2: Major Internal Components........................................................................................................ 13
Figure 3: Aspirator Installation ................................................................................................................. 14
Figure 4: Rear Gas Connections ................................................................................................................ 16
Figure 5: Rear Gas Connections and Controls with Optional Gas Panel..................................................... 16
Figure 6: AC Power Connections .............................................................................................................. 17
Figure 7: AC Power Connections with Optional Gas Panel........................................................................ 18
Figure 8: Data Display Screen................................................................................................................... 19
Figure 9: Block Diagram of Gas Flow Path and Aspriator ......................................................................... 22
Figure 10: Block Diagram of Gas Flow Path with Optional Valves and Aspirator...................................... 23
Figure 11: Vacuum Pump Assembly.......................................................................................................... 26
Figure 12: Vacuum Pump Mount Dimensions ........................................................................................... 27
Figure 13: Vacuum Pump Dimensions ......................................................................................................27
Figure 14: Vacuum Pump Power Connections and Controls ...................................................................... 28
Figure 15: Block Diagram of Gas Flow Path and Optional Vacuum Pump................................................. 29
Figure 16: Block Diagram of Gas Flow Path with Optional Valves and Vacuum Pump .............................29
Figure 17: Rear Panel Electrical Connectors.............................................................................................. 31
Figure 18: Data Display Screen ................................................................................................................. 35
Figure 19: Keypad..................................................................................................................................... 36
Figure 20: Main Menu ..............................................................................................................................36
Figure 21: Main Menu (without valve option) ...........................................................................................37
Figure 22: Isolate Analyzer ....................................................................................................................... 37
Figure 23: Isolate Warning........................................................................................................................ 38
Figure 24: Restore Sample Gas Flow......................................................................................................... 38
Figure 25: Calibrate Menu ........................................................................................................................ 39
Figure 26: Check/Adjust Zero Menu.......................................................................................................... 39
Figure 27: Check/Adjust Zero Screen ........................................................................................................ 40
Figure 28: User Zero Offset ....................................................................................................................... 40
Figure 29: Manual Zero Screen .................................................................................................................41
Figure 30: Data History Menu................................................................................................................... 42
Figure 31: Data History Screen.................................................................................................................. 43
Figure 32: Install Media ............................................................................................................................ 43
Figure 33: Example of Data Download......................................................................................................43
Figure 34: Data Downloader Menu............................................................................................................ 44
Figure 35: Data Downloader Screen .......................................................................................................... 44
Figure 36: View Location Screen............................................................................................................... 45
Figure 37: Keyboard Display..................................................................................................................... 45
Figure 38: Delete Selection........................................................................................................................ 46
Figure 39: View Zero Log Menu ............................................................................................................... 46
Figure 40: Zero Log Screen ....................................................................................................................... 47
Figure 41: View System Error Code Log Menu .........................................................................................47
Figure 42: System Error Code Screen........................................................................................................48
Figure 43: Pump Capacity Test Log Menu................................................................................................. 48
Figure 44: Pump Capacity Test Log...........................................................................................................49
Figure 45: Sample GSF Menu ................................................................................................................... 49
Figure 46: Sample GSF Setup Screen ........................................................................................................ 50
Figure 47: GSF Pressure Setting................................................................................................................ 50
Figure 48: Fan Failure Alarm....................................................................................................................50
Table of Contents DF-745 3
Figure 49: Alarm Setup Menu................................................................................................................... 51
Figure 50: Alarm Setup Screen ................................................................................................................. 52
Figure 51: Temperature Alarm Setup ........................................................................................................ 53
Figure 52: Pressure Alarm Setup............................................................................................................... 53
Figure 53: System Alarm Setup................................................................................................................. 54
Figure 54: Analog Output Setup Menu...................................................................................................... 55
Figure 55: Analog Output Setup Screen .................................................................................................... 55
Figure 56: Graph Setup Menu ................................................................................................................... 56
Figure 57: Graph Setup Screen.................................................................................................................. 56
Figure 58: Active Zero On/Off Menu ........................................................................................................ 57
Figure 59: Test Relays Menu..................................................................................................................... 58
Figure 60: Test Alarm Relays Screen ........................................................................................................ 58
Figure 61: Test Analog Outputs Menu....................................................................................................... 59
Figure 62: Test Analog Voltage Output Screen.......................................................................................... 59
Figure 63: Signal Monitor Menu ............................................................................................................... 60
Figure 64: Signal Monitor Screen.............................................................................................................. 60
Figure 65: Pump Capacity Test Menu........................................................................................................61
Figure 66: Pump Capacity Test Screen ...................................................................................................... 61
Figure 67: Pump Pressure Failure.............................................................................................................. 61
Figure 68: Pump Capacity Test Log ..........................................................................................................62
Figure 69: Adjust Contrast Menu ..............................................................................................................62
Figure 70: Adjust Display Contrast Screen ................................................................................................ 62
Figure 71: Power Up Default Menu ........................................................................................................... 63
Figure 72: Power Up Default Screen.......................................................................................................... 63
Figure 73: Date/Time Menu ...................................................................................................................... 64
Figure 74: Date/Time Setup Screen ........................................................................................................... 64
Figure 75: Communications Menu ............................................................................................................65
Figure 76: Communications Setup Screen ................................................................................................. 65
Figure 77: Download System Data Menu .................................................................................................. 66
Figure 78: Insert Media............................................................................................................................. 66
Figure 79: Media Warning ........................................................................................................................ 66
Figure 80: Download Time Line................................................................................................................ 67
Figure 81: System Info Menu .................................................................................................................... 67
Figure 82: System Info Screen................................................................................................................... 68
Figure 83: Software Upgrade Screen ......................................................................................................... 68
Figure 84: Schematic of Moisture Cell ...................................................................................................... 77
Figure 85: Hydrogen Service Safety System............................................................................................... 93
Figure 86: Pump Purge Option .................................................................................................................. 94
4 DF-745 Table of Contents
Table of Tables
Table 1: Recommended Sample Outlet Vacuum Pressure .......................................................................... 21
Table 2: Pin-out of Serial Comm Connector J5.......................................................................................... 32
Table 3: Serial Communications Connections ........................................................................................... 32
Table 4: Pin-Out of Moisture Signal Output Connector J4 ......................................................................... 32
Table 5: Pin-Out of Relay Connectors J8 and J9 ........................................................................................ 33
Table 6: Alarm Codes ............................................................................................................................... 51
Table 7: Sample Outlet Pressure................................................................................................................ 69
Table 8: Replaceable Parts List.................................................................................................................. 73
Table of Contents DF-745 5
2 Cautions
There are a number of warnings and cautions that must be observed to avoid damage to the
analyzer as well to insure the safety of its users. The analyzer must be operated in a manner
specified in this manual. Delta F cannot be responsible for direct or consequential damages
that result from installing or operating the analyzer in a manner not described in this manual.
Importantly, the analyzer has been designed for use with inert, non-toxic, non-combustible
sample gases only. Delta F cannot be responsible for direct or consequential damages that
result from using the analyzer with these gases.
2.1 Symbols and Explanations
Following is a list of the various symbols used throughout this manual and their definitions.
CAUTION
This symbol alerts the user to the presence of physically hazardous
conditions that may be dangerous to individuals or equipment.
This symbol alerts the user to the presence of important operations
and/or maintenance information.
2.2 Important Warnings
Potentially hazardous AC voltages are present
within this instrument. Leave all servicing to
qualified personnel. Disconnect the AC power
source when installing or removing: external
connections, the sensor, or the electronics.
NOTE
CAUTION
Cautions DF-745 7
CAUTION
Do not setup or operate this analyzer without a
complete understanding of the instructions in this
manual. Do not connect this Analyzer to a power
source until all signal and plumbing connections
are made.
CAUTION
This analyzer must be operated in a manner consistent with its
intended use and as specified in this manual.
EMI DISCLAIMER
This Analyzer generates and uses small amounts of radio frequency
energy. There is no guarantee that interference to radio or
television signals will not occur in a particular installation. If
interference is experienced, turn-off the analyzer. If the
interference disappears, try one or more of the following methods
to correct the problem:
Reorient the receiving antenna.
Move the instrument with respect to the receiver.
Place the analyzer and receiver on different AC circuits.
8 DF-745 Cautions
3 Specifications
3.1 Moisture
Lowest Detection Level (LDL): 2 ppb @ Constant Conditions
Resolution: Analytical (Smallest Detectable Change): .5 ppb
Display: 100 ppt
Accuracy: Greater of ±3% of reading or ±1 ppb @ Constant Conditions
Speed of Response: Typically 10 minutes to reach 90 percent of an upward step change
Upset Recovery Time: Typically less than 5 minutes from a high ppb upset to within 10
ppb of the previously stable reading.
Range: 0-20 ppm
Background Gas Compatibility: All inert and passive gases including N2, H2, He, Ar
and O
2
3.2 General
Warranty: One year from ship date on the entire instrument. See Warranty section on
page 81.
Power Requirements: 100 to 120 VAC, 50/60 Hz, standard, 5 Amps
200 to 240 VAC, 50/60 Hz (optional), 2.5 Amps
Display: 7.4 inch VGA Color (640X480)
Ambient Operating Temperature: 10° C to 40° C (50° F to 105° F)
Output Signals:
Analog Output: User Scalable: 0-2 ppb to 0-20 ppm Moisture
0-1, 0-2, 0-5, or 0-10 VDC (minimum load resistance 1K)
Isolated 4-20 mADC, 1K ohm loop resistance max (28V Compliance voltage provided)
Digital Communications: Two-way RS-232 or RS-485 set at the time of order
Operating Inlet Pressure: 5 to 30 psig (0.3 to 2 bar)
Flow Rate: 0.5 – 4.0 slpm N
Sample Temperature: 10° C to 80°C (50° F to 176° F)
EMI Sensitivity: Tested to standards EN61000-3-3 and EN61326-1
2
Specifications DF-745 9
Audible/Visual Alarm Status Indicators: Four Moisture levels, Temperature,
Moisture cell Diagnostic, Zero Verification or Calibration in Process, Moisture Analyzer
off-line, Analog output freeze during calibration.
Alarm Relays: Four non-latching, independently assignable to moisture alarms or to
moisture calibration-in-process indicator. SPDT contacts rated at 1 Amp @ 30 VDC. Fail
safe action upon loss of power to alarm condition. Not designed to switch AC power.
Storage Temperature: Not to exceed 50° C (122° F)
Construction: NEMA 1, 19 inch rack mount
Dimensions: 19 inch (48.3cm) wide x 10.5 inch (26.7 cm) high x 22.5 inch (57.2 cm)
deep
Weight: 70 pounds (31.8 kg)
Gas Path Construction Materials:
300 series stainless steel electro-polished
1/4-inch VCR-type compatible sample inlet fitting
1/8-inch compression sample outlet fitting
1/4-inch compression vacuum fitting
Kel-f valve seats
PTFE Vacuum tubing
10 DF-745 Specifications
EnterNextMenuESC
19.00 [482.60]
18.31 [465.12]
.34 [8.74]
7.50 [190.50] 10.47 [265.94]
1.49 [37.72]
1.55 [39.25]
3.63 [92.08]
2.54 [64.44]
NOT USED
55 RLY4-COMRLY2-COM
44 RLY3-NC12
3
6
7
KEY
RLY3-NO
GND8
RLY4-NC
321 RLY3-COM
7
6 RLY4-NO
RLY1-COM
RLY1-NO
RLY1-NC
KEY
RLY2-NO
RLY2-NC
GND 8
87645
KEY
GND8
764
TX-
GND
~
3312
4-20mA-
4-20mA+
AOUT+
1
2
5 AOUT-
~~~
RX+
TX+
RX-
KEY
~ ~
7.71 [195.77]
9.45 [239.90]
16.33 [414.78]
16.58 [421.01]
17.08 [433.71]
23.93 [607.70]
22.38 [568.45]
(19.00 [482.60])
6.94 [176.28]
Figure 1: Overall View
Specifications DF-745 11
4 Installation, Start Up and Shut Down
2
Installation of the analyzer requires the following steps be followed:
Connecting the N2/Air supply to the aspirator
Connecting an exhaust tube to the aspirator outlet, if needed
Connecting the pneumatic pressure service to the pneumatic inlet fitting
Connecting the sample gas line to the analyzer inlet fitting
Making the power connection to the analyzer
POWER SWITCH
USB PORT H O SENSOR
Figure 2: Major Internal Components
Installation, Start Up and Shut Down DF-745 13
4.1 Analyzer Installation
4.1.1 Vacuum Source
4.1.1.1 Aspirator
The standard vacuum source provided with the DF-745 analyzer is a factory installed
aspirator as shown in Figure 3. Aspirator installation with the optional gas panel is identical.
SAMPLE VENT
80 psi IN
ASPIRATOR
Figure 3: Aspirator Installation
A regulated source of dry compressed gas (either N2 or air) is required at 80psi and a flow
rate of approximately 15 slpm. Connection is made to the aspirator by way of a ¼ inch
compression fitting labeled “80 psi IN”. It is very important to note that the diameter of the
gas supply line must be a minimum of ¼ inch to provide sufficient flow. If operation in
Helium background is anticipated, a shut off valve should be installed at the inlet to the
aspirator.
For ease of installation, the aspirator source can also supply the pneumatic gas inlet by way
of a 1/8 inch adapter.
The gas at the sample vent port is comprised of the analyzer sample gas and the compressed
gas, and any noise can be mitigated by simply installing a ¼ inch tube of approximately 3 ft
in length. Backpressure should be minimized at this port (max 2.0 psi) and if the exhaust
must be vented for safety reasons it must be done to a header of greater diameter.
The aspirator needle valve should be opened (CCW) completely.
14 DF-745 Installation, Start Up and Shut Down
Be sure to use a backup wrench when making all connections to the
aspirator.
4.1.1.2 Vacuum Pump
An optional vacuum pump can be purchased for those cases where there is insufficient gas
pressure or flow to operate the aspirator, or when the analyzer is installed in a portable cart
and connection to a continuous gas supply is inconvenient. See page 25 for information on
the installation of the optional vacuum pump.
4.1.2 Pneumatic Pressure Line Connection - Optional
The pneumatic gas connection (required for the optional gas panel) is a 1/8 inch
compression fitting as shown in Figure 5 and requires 70 – 125 psig air or N2 pressure. For
ease of installation, the pneumatic feed line can be connected directly to the ¼ inch aspirator
source by way of a 1/8 inch adapter.
4.1.3 Sample Gas Connections
4.1.3.1 Sample Gas Inlet Connection
Sample gas is connected to the analyzer via a ¼ inch male swivel VCR fitting labeled
Process Inlet at the rear of the instrument as shown in Figure 4. Sample pressure of 30 –
150 psig is required and is regulated internally.
Pre-purge the line by connecting to the analyzer (with a new VCR filter gasket) only finger
tight and flowing gas for 15 minutes. Then tighten the inlet fitting.
NOTE: A VCR filter gasket (supplied) should always be used to protect the gas delivery
system from any particulate matter that may have collected in the line.
When power is applied to the analyzer, the internal gas control valves will automatically go
to a state as determined by the user. See the section on Power Up Defaults on page 63 for
additional information.
NOTE: When received from the factory, if equipped with internal gas valves, the moisture
cell will be isolated with pressure in the system. See the sections on Moisture Gas Valves
Control on pages 38 for instructions on starting the gas flow through either sensor.
See Figure 9 for an overview of the gas flow through the analyzer.
See the section on Gas Pressure and Flow Settings on page 20 for important information on
plumbing and powering up the analyzer.
4.1.3.2 Sample Gas Outlet Connection
The sample gas outlet connection is a ¼ inch compression fitting labeled Moisture Sensor
Outlet as shown in Figure 4. A ¼ inch stainless tube is connected from the analyzer sample
outlet to the Aspirator assembly. See Figure 3. Open the needle control valve (CCW) on
the top of the aspirator assembly completely. NOTE: If the Hydrogen Service Safety
System is included, the sample outlet line must be made of steel. See page 89 for additional
information.
Installation, Start Up and Shut Down DF-745 15
See page 25 for information on the installation of the optional vacuum pump.
PROCESS OUTLET
REGULATOR ADJUST
BYPASS OUTLET
GND 8
GND8
RLY2-NC
RLY2-NO
RLY1-NC
RLY1-NO
RLY1-COM
KEY
7
RLY4-NC
6 RLY4-NO
RLY3-NO
1 RLY3-COM
7
6
55 RLY4-COMRLY2-COM
NOT USED
44 RLY3-NC
23KEY32
1
Figure 4: Rear Gas Connections
PNEUMATIC GAS INLET
GND
GND8
TX-
KEY
7
KEY
6
AOUT+
RX-
5 AOUT-
4
TX+
4-20mA+
RX+
124-20mA-
~
~
~
~
GND 8
GND8
RLY2-NC
7
RLY4-NC
RLY2-NO
6 RLY4-NO
RLY1-NC
RLY1-NO
RLY3-NO
RLY1-COM
KEY
1 RLY3-COM
8
7
6
5
4
33
2
1
~
~
PROCESS INLET
7
6
55 RLY4-COMRLY2-COM
NOT USED
44 RLY3-NC
23KEY32
1
BYPASS FLOW ADJUST
GND
TX-
KEY
RX-
TX+
RX+
8
GND8
7
KEY
7
6
6
AOUT+
5
5 AOUT-
4
4
33
4-20mA+
12124-20mA-
~
~
~
~
~
~
PROCESS INLET
PROCESS OUTLET
Figure 5: Rear Gas Connections and Controls with Optional Gas Panel
16 DF-745 Installation, Start Up and Shut Down
4.1.4 Electrical Connections
Open the door and locate the power switch in the center of the upper rail. Be sure it is in
the OFF position. Plug the line cord (supplied with 110VAC units only) into the receptacle
at the back of the analyzer. Verify the operating voltage is proper according to the label on
the rear and connect the line cord to the power source. See Figure 6 and Figure 7.
4.1.5 Hydrogen Service Safety System
This optional system is designed to safeguard the DF-745 from explosion hazards when
operating on hydrogen sample gas under normal pressure and flow conditions as detailed in
the Operating Instruction Manual. The instrument chassis and the remote pump, if
equipped, are both protected by maintaining a safe condition within their respective
enclosures. If installed, this option impacts the electrical wiring, gas plumbing and operation
of the analyzer. See page 89 for additional installation and operation information.
NOTE, if equipped with the Hydrogen Safety Service System, when shipped from the
factory the analyzer will be configured through the GSF screen to measure hydrogen. As a
result, the Hydrogen Safety Service System will be enabled out of the box.
STANDARD GAS PANEL SHOWN
Figure 6: AC Power Connections
GND 8
GND8
RLY2-NC
7
RLY4-NC
RLY2-NO
6 RLY4-NO
RLY1-NC
RLY1-NO
RLY3-NO
RLY1-COM
KEY
1 RLY3-COM
GND
GND8
TX-
KEY
7
KEY
6
AOUT+
RX-
5 AOUT-
4
TX+
2
4-20mA+
RX+
4-20mA-
~
~
~
~
AC INLET
7
6
55 RLY4-COMRLY2-COM
NOT USED
44 RLY3-NC
23KEY32
1
8
7
6
5
4
33
121
~
~
Installation, Start Up and Shut Down DF-745 17
GND
8
GND
RLY2-NC
RLY2-NO
RLY2-COM
RLY1-NC
RLY1-NO
RLY1-COM
KEY
TX-67
KEY
TX+42
RX+ 1
8
RLY4-NC
7
7
RLY4-NO
6
6
RLY4-COM
5
5
RLY3-NC
4
4
RLY3-NO
3
3
KEY
2
2
RLY3-COM
1
1
8GND
GND 8
KEY67
AOUT+
5RX-
AOUT- 5
3
3
4-20mA+42
4-20mA- 1
~
~
~
~
ISOLATION GAS PANEL SHOWN AC INLET
Figure 7: AC Power Connections with Optional Gas Panel
~
NOT USED
~
18 DF-745 Installation, Start Up and Shut Down
4.2 Analyzer Start Up
It is important to note that, if equipped with automatic gas valves, the moisture cell is
isolated from gas flow while the analyzer is off power.
Open the door and turn on the power using the main power switch inside the analyzer. See
Figure 2. The pump, if equipped, should turn on (see page 17) and the analyzer will
undergo a series of Diagnostic Procedures while the various startup screens are displayed.
Next, the Delta F Corporation logo is briefly displayed and then the data display appears
with the “Warming Up” screen flashing. The warm up process takes approximately six to
ninety minutes after which the display will look similar to Figure 8 (values shown are only
representative).
During the Warm Up process the gas valves (if equipped) can be opened and gas flow
started. See the section on Gas Pressure and Flow Settings on page 20 for important
information on the gas delivery system and setting proper pressures and flow rates.
During the warm up period all analog and digital outputs are held to an
artificial 0.011ppb reading to avoid the reporting of false readings.
NOTE
Figure 8: Data Display Screen
4.2.1 Gas Delivery System
The gas delivery system as shown in Figure 9 is designed to deliver a gas flow rate of 2
liters per minute to the moisture cell while maintaining the highest standards of gas purity
and delivery for ultra-trace analysis. Features include a single inlet line and flow meter for
the gas sample, and optional bypass loop to maintain constant purging, and essentially deadleg free delivery.
The connections at the rear of the gas delivery system include a ¼” VCR swivel connection
for the process inlet, a ¼” compression outlet for the moisture cell, an optional pneumatic
gas connection (1/8” compression), and an optional ¼” compression outlet for the bypass
loop. Also on the rear of the gas delivery system, if equipped, are a sample gas regulator to
adjust the internal sample pressure and a bypass flow meter.
Installation, Start Up and Shut Down DF-745 19
The moisture cell outlet will be connected to the supplied aspirator or, if equipped, to the
vacuum pump.
The sample inlet to the moisture analyzer, as well as the zero gas inlet, are heated to 60 C.
This is done to mitigate any effects of adsorption-desorption of trace moisture on the walls
of the tubing.
4.2.2 Gas Pressure and Flow Settings
Attention to the setting of gas pressure and flow is critical to proper operation of the
analyzer. If all steps are followed carefully at the time of start up, subsequent changes to
flow or background gas will be made easier. The following procedure assumes all electrical
and plumbing connections have been made according to instructions in this manual. In
addition, this procedure assumes a Nitrogen gas background unless otherwise noted.
1. Power up the unit. See page 19. If the unit is equipped with a Hydrogen Safety
System, no flow will enter the system until the unit is on power.
2. Ensure that the needle valve on the aspirator is fully open.
3. For a basic analyzer with no cell isolation valves installed,
a. simply provide sufficient pressure (5-30 psi), resulting in a flow of 1 slpm (2
scfh) as indicated on the flow meter located behind the front door. NOTE:
The flow rate will directly impact the overall system speed of response.
b. Turn on the vacuum source (aspirator) by applying gas to the high pressure
inlet. See Figure 3. (Except when measuring in Helium background which is
not run under vacuum but at ambient) NOTE: Once the vacuum source is
connected and running, proper flow is indicated by a full scale reading on the
flowmeter.
c. Go to step 5.
4. For analyzers equipped with optional cell isolation valves:
a. Completely open (turn fully clockwise) the inlet regulator on the rear of the
analyzer. For operation in Nitrogen, Argon and Oxygen the regulator is
closed (turned counter clockwise) to the approximate middle, or 50% of its
range. For operation in Helium and Hydrogen it should be closed to 80-90%
of its range resulting in a flow of 1 slpm (2 scfh) as indicated on the flow
meter located behind the front door. NOTE: The flow rate will directly
impact the overall system speed of response.
b. Open the flowmeter bypass valve on the rear of the analyzer and flow in the
bypass loop will be indicated on the flowmeter. Adjust the flowmeter bypass
valve to 0.5 slpm. See Figure 5.
c. Purge for 15 minutes before opening gas valves to the moisture cell.
d. The state of the gas control valves is indicated on the main display. The
default state of a factory-shipped instrument is isolation. This can be
adjusted in the Power Up Default section. If the moisture cell is isolated,
establish process flow via the Main menu. See page 38.
20 DF-745 Installation, Start Up and Shut Down
e. Use the regulator to adjust the flow through the cell to 1 slpm (2 scfh) as
Background Gas
Pressure
Vacuum Source
N2
150 -250 Torr
ONAr280 -380 Torr
ONHe740 -780 Torr
OFF
*H2300 -40
0 Torr
ONO2300 -400 Torr
ON
shown on the flowmeter behind the front door. NOTE: This flow rate may
be reduced to minimize gas consumption but the flow rate will directly
impact the overall system speed of response.
f. Confirm that the needle valve on the vacuum source (aspirator) is fully open
(CCW).
g. Turn on the vacuum source (aspirator) by applying gas to the high pressure
inlet. See Figure 3. (Except when measuring in Helium background which is
not run under vacuum but at ambient)
5. At this point, some adjustment of the aspirator needle valve may be necessary to
achieve the necessary operating cell pressures for each gas (except Helium where
there is no vacuum operation). The proper pressure ranges listed in Table 1 will
automatically appear on the display when the GSF is selected.
*A shut off valve must be installed at the inlet to the aspirator to disable the vacuum.
Table 1: Recommended Sample Outlet Vacuum Pressure
4.2.3 Download System Data
The final step of the installation, after a couple days of dry down, should be to download
the system data (see page 65), and send them by e-mail to service@delta-f.com for review.
This will allow the factory to confirm that the analyzer is working properly by comparison
with data stored at the time of shipment, and in addition will set a baseline for comparison
with future downloads, if any.
4.3 Analyzer Shut Down
In order to minimize the time required for the analyzer to re-achieve a zero baseline on start
up, the following steps should be followed when shutting the analyzer down.
Short Term Shut Down - A short-term shut down, for example to move and restart the
analyzer, can be accomplished by simply shutting off the power switch behind the front
door. This action initiates the standard isolation process (for analyzers equipped with gas
control valves) and computer shut down which takes approximately 40 seconds.
Installation, Start Up and Shut Down DF-745 21
Long Term Shut Down – For analyzers with gas control valves, from the Main Menu go
to System, and select Isolate Analyzer. A routine automatically starts that closes the
downstream valve and allows pressure to build in the moisture cell after which an upstream
valve closes as well. Throughout this process a message appears over the display instructing
the user to wait 40 seconds. Once complete, the message disappears and the user may shut
the power off with the switch behind the front door that initiates the computer shut down
sequence that takes an additional 40 seconds.
Additional long-term isolation security can be achieved by closing the valve on the
rotameter on the rear of the instrument as well as completely closing the sample inlet
regulator.
If the analyzer is being disconnected from gas, be sure to tightly cap all gas connections.
On analyzers that have no gas control valves:
1. Remove the vacuum source.
2. Wait a few minutes to allow positive pressure to build in the moisture cell and
monitor the pressure on the Main Display.
3. Be sure to tightly cap all connections.
NOTE: See the section on Power up Default on page 63 for setting user selectable
preferences at the time of power up.
Loss of power will result in automatic valve closure and the following restoration of power
will result in the “Scan Disk” function occurring before system start-up.
FLOW METER
(FRONT)
H O
2
REAR PANEL
PI
.010 ORIFICE
MOISTURE SENSOR OUTLET
ASPIRATOR WITH BUILT
IN VACUUM CONTROL
NEEDLE VALVE
MOISTURE
SAMPLE VENT
80 psi IN
TO CREATE VACUUM
PROCESS INLET
Figure 9: Block Diagram of Gas Flow Path and Aspriator
22 DF-745 Installation, Start Up and Shut Down
H O
2
FLOW METER
(FRONT)
V1
PI
REAR PANEL
MOISTURE SENSOR OUTLET
ASPIRATOR WITH BUILT
IN VACUUM CONTROL
NEEDLE VALVE
MOISTURE
SAMPLE VENT
V2
.010 ORIFICE
REGULATOR
ADJUSTMENT
PROCESS INLET
FLOWSWITCH
BYPASS FLOWMETER
BYPASS FLOW ADJUST
BYPASS OUTLET
80 psi IN
TO CREATE VACUUM
(REAR)
Figure 10: Block Diagram of Gas Flow Path with Optional Valves and Aspirator
Installation, Start Up and Shut Down DF-745 23
5 Options
The following options to the DF-745 are available at the time of order.
5.1 Key Lock
An optional key lock can be installed in the door of the analyzer to prevent access to the
power switch and other internal components. The lock is supplied with two keys.
If the analyzer is operating, the key lock does not prevent adjustments from the front panel.
5.2 Operating Voltage
The analyzer can be wired for operation at either 100-120 Volts AC or 200-240 Volts AC.
The operating voltage is not adjustable in the field.
5.3 Serial Communications
The analyzer can be set for communications by RS-232 or RS-485.
The serial communications option is not adjustable in the field.
See page 31, 65 and 67 for additional information.
5.4 Analog Voltage Output
The maximum analog voltage output can be set at the factory for 0-1, 0-2, 0-5 or 0-10
Volts DC.
The maximum analog voltage output is not adjustable in the field.
See page 32 and 55 for additional information.
5.5 Hydrogen Service Safety System
This option enables the analyzer to be safely used in a hydrogen background application.
See page 89 for additional information.
5.6 Vacuum Pump
An optional pump can be purchased to replace the aspirator in cases where there is
insufficient gas flow for the aspirator or when the analyzer is installed in a portable cart and
connection to an air supply is inconvenient.
NOTE: If a pump is being retrofitted to an analyzer configured with an aspirator, then the
aspirator assembly must be removed completely to uncover the pump power connector and
Options DF-745 25
breaker switch. The pump connection should be made directly to the Moisture Sample
Outlet as described in section 5.6.2.
TO MOISTURE
SENSOR OUTLET
PLASTIC TUBING
SUPPLIED
POWER CORD
TO VACUUM PUMP
POWER CONNECTOR
Figure 11: Vacuum Pump Assembly
5.6.1 Installation of the Vacuum Pump
Mount the vacuum pump to the bracket
Connect the line from the moisture sample outlet to the needle control valve and
vacuum pump
Make the electrical power connection to the vacuum pump
5.6.1.1 Vacuum Pump Mounting
Mount the vacuum pump within 8 feet of the analyzer. Refer to Figure 12 and Figure 13 for
mounting hole and pump dimensions.
CAUTION
Be sure the pump outlet is at atmospheric pressure before starting.
The pump is not designed to start against any backpressure.
26 DF-745 Options
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