GE Sensing MTS6 OEM Operating Manual
Single-Channel Hygrometer
User’s Manual
910-291-OEM Rev. D
December 2011
Single-Channel Hygrometer
User’s Manual
910-291-OEM Rev. D
December 2011
[no content intended for this page]
ii
Preface
Information Paragraphs
• Note paragraphs provide information that provides a deeper understanding of
the situation, but is not essential to the proper completion of the instructions.
• Important paragraphs provide information that emphasizes instructions that
are essential to proper setup of the equipment. Failure to follow these
instructions carefully may cause unreliable performance.
• Caution! paragraphs provide information that alerts the operator to a hazardous
situation that can cause damage to property or equipment.
• Warning! paragraphs provide information that alerts the operator to a
hazardous situation that can cause injury to personnel. Cautionary information
is also included, when applicable.
Safety Issues
WARNING! It is the responsibility of the user to make sure all local, county,
state and national codes, regulations, rules and laws related to
safety and safe operating conditions are met for each
installation.
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance
with local codes, standards, regulations, or laws applicable to safety.
Working Area
WARNING! Auxiliary equipment may have both manual and automatic
modes of operation. As equipment can move suddenly and
without warning, do not enter the work cell of this equipment
during automatic operation, and do not enter the work
envelope of this equipment during manual operation. If you do,
serious injury can result.
WARNING! Make sure that power to the auxiliary equipment is turned OFF
and locked out before you perform maintenance procedures on
the equipment.
Single-Channel Hygrometer User’s Manual iii
Preface
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the
auxiliary equipment.
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment
applicable to the auxiliary equipment. Examples include safety glasses, protective
headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the
equipment.
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
The manufacturer is an active participant in Europe’s Waste Electrical and
Electronic Equipment (WEEE) take-back initiative, directive 2002/96/EC.
The equipment that you bought has required the extraction and use of natural
resources for its production. It may contain hazardous substances that could impact
health and the environment.
In order to avoid the dissemination of those substances in our environment and to
diminish the pressure on the natural resources, we encourage you to use the
appropriate take-back systems. Those systems will reuse or recycle most of the
materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please
contact your local or regional waste administration.
iv Single-Channel Hygrometer User’s Manual
Contents
Chapter 1. Features and Capabilities
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Electronics Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Chapter 2. Installation
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2.2 Selecting the Recorder Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.3 Mounting the Electronics Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3.1 Basic Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3.2 Adapter Plate Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Mounting the Sample System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5 Installing the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.6 Wiring the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.6.1 Connecting a Standard Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.6.2 Connecting a Moisture Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.6.3 Connecting the Recorder Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.6.4 Connecting the Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.6.5 Installing the AC Power Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.6.6 Installing the DC Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Single-Channel Hygrometer User’s Manual v
Contents
Chapter 3. Operation and Programming
3.1 Using the Single-Channel Hygrometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.1.1 Starting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.1.2 Accessing the Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.1.3 Entering Numeric Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.2 Setting Up the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.2.1 Selecting Primary Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.2.2 Setting Decimal Places . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.2.3 Contrast. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.3 Setting Up the Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.3.1 Entering the Output Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.3.2 Selecting Output Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.3.3 Selecting an Output Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.4 Changing the Upper Output Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.5 Changing the Lower Output Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.3.6 Testing the Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.3.7 Trimming the Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.4 Setting Up Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.4.1 Selecting an Alarm Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.4.2 Selecting Alarm Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.4.3 Selecting Alarm Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.4.4 Selecting an Alarm Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.4.5 How the Alarm Types Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.4.6 Changing the Upper Alarm Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.4.7 Changing the Lower Alarm Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.4.8 Testing the Alarm Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.5 Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.5.1 Checking the Data Log Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.5.2 Log Settings Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3.5.3 Managing Log Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.5.4 Ejecting the SD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.5.5 Viewing Data Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
vi Single-Channel Hygrometer User’s Manual
Contents
3.6 Setting Other Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.6.1 Entering the Passcode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.6.2 Setting the Fault Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.6.3 Setting Autocal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.6.4 Setting Calibration Data 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.6.5 Setting Calibration Data 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.6.6 Reading and Setting the Calibration References . . . . . . . . . . . . . . . . . 65
3.6.7 Entering the Aluminum-Oxide Moisture Probe Serial Number. . . . . 67
3.6.8 Setting the Volume Mixing Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3.6.9 Resetting the Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3.6.10 Selecting the Probe Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
3.6.11 Setting a Constant DP °C Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
3.7 Viewing System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3.7.1 Checking the ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3.7.2 Checking the Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3.7.3 Checking the Software Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
3.7.4 Checking the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
3.7.5 Checking the Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
3.8 Locking the Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Chapter 4. Service and Maintenance
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.2 Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.3 Replacing/Recalibrating Moisture Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
4.4 Cleaning the Single-Channel Hygrometer Front Panel . . . . . . . . . . . . . . . . . . 84
Chapter 5. Specifications
5.1 Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
5.2 Moisture Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Appendix A. Outline and Installation Drawings
Appendix B. Menu Maps
Appendix C. Reading the MicroSD Card
C.1 Removing the Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
C.2 Accessing the Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
C.3 Setting Up the Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Appendix D. The Non-Enclosure Package
Single-Channel Hygrometer User’s Manual vii
Contents
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viii Single-Channel Hygrometer User’s Manual
Chapter 1. Features and Capabilities
Chapter 1. Features and Capabilities
1.1 Introduction
This instrument is a microprocessor-based, single-channel hygrometer that
measures moisture content in gases. It is intended for Original Equipment
Manufacturer (
process conditions that require real-time moisture measurement.
The hygrometer accepts any calibration range provided with probes (see
Chapter 5, Specifications for more information). It comes equipped with
two standard alarm relays, one fault alarm relay, and a single analog output.
It also has onboard data logging capability using an micro SD card.
1.2 Electronics Unit
The hygrometer displays measurement data on a liquid crystal display
LCD). You can program your unit and enter probe information using the
(
keys on the front panel (see Figure 1). It accepts line voltages of a universal
power supply from 100 to 240 VAC, or 24 VDC, depending on what is
ordered.
OEM) applications, and is suitable for a wide range of
Figure 1: Front Panel
Single-Channel Hygrometer User’s Manual 1
Chapter 1. Features and Capabilities
Shield
Sensor
1.3 Probes
The moisture probe is the part of the system that comes in direct contact
with the process. The hygrometer uses a probe (see examples in Figure 2
and Figure 3) to measure dewpoint temperature in °C or °F. The sensor
assembly is secured to the probe mount and is protected with a sintered
stainless steel shield (see Figure 2).
Note: Other types of shields are available upon request.
Figure 2: Aluminum-Oxide Moisture Probe
Figure 3: Moisture Transmitter
2 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
Chapter 2. Installation
2.1 Introduction
Installing the Single-Channel Hygrometer includes the following steps:
• selecting the recorder output
• mounting the electronics unit
• mounting the sample system
• installing the probe into the sample system
• wiring the input power
• wiring the probe and alarm connections
WARNING! To ensure safe operation, the Single-Channel Hygrometer
must be panel mounted and operated as described in this
manual. Also, be sure to follow all applicable local safety
codes and regulations for installing electrical equipment.
Note: For the non-enclosure Single-Channel Hygrometer package, please
refer to Appendix D for mounting and installation.
Single-Channel Hygrometer User’s Manual 3
Chapter 2. Installation
2.2 Selecting the Recorder Output
Note: By default, the recorder is set to the current output.
Note: The customer will provide their own cable for connecting the
recorder. Acceptable cables range from 16 to 26AWG.
The Single-Channel Hygro meter has one isolated analog recorder output.
The recorder output provides either a current or voltage signal, which is set
by switch
S1 on the main PC board.
Complete these steps to check or reset switch
WARNING! Never connect line voltage or any other power input to
S1 (see Figure 8 on page 7).
the recorder output terminals.
1. Make sure the Single-Channel Hygrometer is turned off and unplugged.
WARNING! The Single-Channel Hygrometer must be isolated or
disconnected from all voltage sources before changing
the recorder output.
2. Remove the screw at the top of the back panel (see Figure 4).
Figure 4: Back Panel
4 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
2.2 Selecting the Recorder Output (cont.)
3. Lift the back edge of the cover (see Figure 5), slide the cover back (see
Figure 6), and lift it from the enclosure (see Figure 7 on page 6).
Figure 5: Lifting the Back Edge of the Cover
Figure 6: Sliding the Cover Back
Single-Channel Hygrometer User’s Manual 5
Chapter 2. Installation
2.2 Selecting the Recorder Output (cont.)
Figure 7: Lifting the Cover
6 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
!
2.2 Selecting the Recorder Output (cont.)
4. Locate switch S1 (see Figure 8, highlighted area).
CAUTION! Use proper ESD grounding prior to changing the
switch.
5. Set switch S1 to the desired position: V for voltage or I for current.
Figure 8: Switch S1 on the Main PC Board
6. After setting the switch, replace the cover and reinsert the rear
enclosure screw.
Single-Channel Hygrometer User’s Manual 7
Chapter 2. Installation
2.3 Mounting the Electronics Unit
The Single-Channel Hygro meter unit can be installed in a panel up to 0.25
in. (6 mm) thick. See Appendix A, Outline and Installation Drawings, for
the required panel cutout dimensions.
IMPORTANT: For NEMA 4 and IP66 installation, the Single-Channel
Hygrometer must be mounted in a rigid, flat panel using the
panel gasket and both mounting brackets provided.
2.3.1 Basic Mounting
To mount the Single-Channel Hygrometer in a panel with a basic 94 mm
(3.69”) x 46 mm (1.81”) opening, refer to the following figures and
complete the following steps:
1. Remove the side panel mount label prior to installation.
Figure 9: Removing Side Panel Mount Label
8 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
2.3.1 Basic Mounting (cont.)
2. Slide the small gasket along the Single-Channel Hygrometer and place
it around the back of the display (see Figure 10).
Figure 10: Installing the Gasket Behind the Display
3. Slide the Single-Channel Hygrometer into the panel cutout (see
Figure 11).
Figure 11: Sliding the Hygrometer into the Panel Cutout
Single-Channel Hygrometer User’s Manual 9
Chapter 2. Installation
2.3.1 Basic Mounting (cont.)
4. Behind the panel, insert the mounting brackets into the side holes
provided (see Figure 12).
Figure 12: Installing the Mounting Brackets
5. Hold the chassis and lock each mounting bracket in place by sliding it
toward the rear of the Single-Channel Hygrometer (see Figure 13).
Figure 13: Locking the Mounting Brackets in Place
10 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
2.3.1 Basic Mounting (cont.)
6. Use a screwdriver to extend the bracket screws to the back of the panel
and secure the hygrometer in the panel cutout (see Figure 14).
Figure 14: Securing the Single-Channel Hygrometer to the Panel
7. Using a feeler gauge behind the gasket, check the compression, and
tighten the bracket screws until the gap is 0.028” ±0.002” (see
Figure 15).
Figure 15: Checking the Gasket Compression
Single-Channel Hygrometer User’s Manual 11
Chapter 2. Installation
2.3.2 Adapter Plate Mounting
Some customers may need to retrofit a Single-Channel Hygrometer into a
cut-out sized for previous OEM panel-mount hygrometers. The previous
generations were of a larger size requiring a 5.40” (137.2 mm) W x 2.65”
(67.3 mm) H cut-out. The Single-Channel Hygrometer is smaller, requiring
a 3.69” (94 mm) W x 1.81” (46 mm) H cut-out. For those customers who
need to retrofit the larger panel cut-out sizes, an optional adapter plate is
available. See Appendix A, Outline and Installation Drawings, for the
required panel cutout.
1. Fit the larger gasket around the adapter plate (see Figure 16).
Figure 16: Installing the Adapter Plate Gasket
12 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
2.3.2 Adapter Plate Mounting (cont.)
2. Fit the adapter plate into the panel cutout (see Figure 17).
Figure 17: Inserting the Adapter Plate
3. Behind the panel, place the metal backing plate over the four adapter
plate mounting screws (see Figure 18).
Figure 18: Applying the Backing Plate
Single-Channel Hygrometer User’s Manual 13
Chapter 2. Installation
2.3.2 Adapter Plate Mounting (cont.)
4. Apply nuts to the four screws and secure the assembly to the panel (see
Figure 19 and Figure 20). Use a feeler gauge behind the gasket, check
the compression, and tighten the nuts until the gap is 0.032” ±0.002”.
Figure 19: Securing the Assembly to the Panel
Figure 20: Plate Assembly Mounting Complete
14 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
2.3.2 Adapter Plate Mounting (cont.)
Now mount the Single-Channel Hygrometer using steps 1-6 in Basic
Mounting on page 8. Re-verify the adapter plate gap after the
Single-Channel Hygrometer is mounted to the adapter plate. The
installation should appear similar to Figure 21 and Figure 22.
Figure 21: Hygrometer Installation with Adapter Plate - Rear
Figure 22: Hygrometer Installation with Adapter Plate - Front
Single-Channel Hygrometer User’s Manual 15
Chapter 2. Installation
COOLING
COIL
PRESSURE
REGULATOR
NEEDLE
VALVE
PRESSURE
GAUGE
ASSEMBLY
SAMPLE
CELL
ASSEMBLY
NEEDLE
VALVE
NEEDLE
VALVE
2.4 Mounting the Sample System
Figure 23: Typical Sample System
16 Single-Channel Hygrometer User’s Manual
Chapter 2. Installation
!
!
2.4 Mounting the Sample System (cont.)
The sample system is normally fastened to a flat metal plate that has four
mounting holes.
Complete the following steps to mount the sample system:
1. Fasten the sample system plate or enclosure to a vertical wall or panel
with a bolt in each of the four corners.
2. Connect the sample system inlet to the process and the outlet to the
return, using appropriate stainless steel fittings and tubing.
CAUTION! Do not start the process flow through the system
until the probe has been properly installed (see the
following section).
2.5 Installing the Probe
Probes are usually installed in a sample system to protect them from any
damaging elements in the process. The probe is mounted in a cylindrical
container called the
system.
sample cell, which is included as part of your sample
Probes are mounted into the sample system or process line with 3/4-16
straight threads that are sealed with an o-ring. Other fittings are available
for special applications.
CAUTION! If the probe is to be mounted directly in the
process line, without a sample system, consult the factory
for proper installation instructions and precautions.
Refer to Figure 24 on page 18, and co mplete these steps to install the probe
into the sample cell:
1. Insert the probe into the sample cell and thread the probe into the
sample cell fitting. Make sure you do not to cross the threads.
2. Tighten the probe securely.
Single-Channel Hygrometer User’s Manual 17
Chapter 2. Installation
!
Probe
Sample Cell
Inlet
Outlet
2.5 Installing the Probe (cont.)
3. Identify the sample cell inlet port as the connection that is perpendicular
to the installed probe.
CAUTION! For maximum protection of the aluminum oxide
sensor, the probe shield should always be left in place.
Figure 24: Probe/Sample Cell Assembly
2.6 Wiring the System
Wiri ng the Single-Channel Hygrometer system includes these steps:
• connecting the probe
• connecting the recorder output
• connecting the alarms
• installing the power cable
WARNING! To ensure safe operation, the Single-Channel Hygrometer
18 Single-Channel Hygrometer User’s Manual
must be installed and operated as described in this
manual. Also, be sure to follow all applicable local safety
codes and regulations for installing electrical equipment.
Chapter 2. Installation
!
123456789
RELAY RATING:
30 VDC, 3A
250 VAC, 3A
FAULT
C C C
VERIDRI RCRD PROBE
MEMORY CARD
123456789
RELAY RATING:
30 VDC, 3A
250 VAC, 3A
24 VDC, 5W
FAULT
C C C
VERIDRI RCRD PROBE
MEMORY CARD
2.6 Wiring the System (cont.)
The CAUTION! symbol is a remind er that Single-Channel
Hygrometer components can be damaged if electrical connections
are not correctly made.
Figure 25: Hygrometer Rear Panel Connections - AC Version
Figure 26: Hygrometer Rear Panel Connections - DC Version
Single-Channel Hygrometer User’s Manual 19
Chapter 2. Installation
DC Power - Terminal Block
+
1 2 3
NO NC NO NC NO NC
C C C
FAULT ALARM ALARM A ALARM B
RTN OUT
(-) (+)
GREEN
RED
C D
PROBE
BLUE
BROWN
BLACK
WHITE
10 11 12 13 14 15 16 17 18
VERIDRI
–
1 2 3 4 5 6 7 8 9
2.6 Wiring the System (cont.)
Figure 27: Single-Channel Hygrometer Wiring Diagram
20 Single-Channel Hygrometer User’s Manual
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