Edgetech 1500 Bedienungsanleitung
399 River Road, Hudson, MA 01749 www.edgetechinstruments.com
508-263-5900 fax: 508-486-9348 h2o@edgetechinstruments.com
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Model 1500
Portable Dew Point Monitor
OPERATORS MANUAL
Model 1500
Dew Point Monitor
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TABLE OF CONTENTS
1.0 GENERAL DESCRIPTION
2.0 SAMPLE CONNECTIONS
2.1 SAMPLE CONNECTIONS
2.2 ALARM RELAY CONNECTIONS
2.3 OUTPUT CONNECTIONS
3.0 FUNCTIONAL DESCRIPTION
3.1 DISPLAY
3.2 MABC BUTTON
3.3 CLEAN MIRRO RELAY
3.4 FLOW CONTROL VALVE
3.5 ALARM RELAY OUTPUT
3.6 ANALOG OUTPUT
3.7 DISPLAY “SCAN” BUTTON
4.0 SETUP
4.1 ALARM SET POINTS
4.2 ABC INTERVAL
5.0 MAINTENANCE
5.1 ROUTINE MAINTENANCE
5.2 MIRROR CLEANING SCHEDULE
5.3 MIRROR CLEANING PROCEDURE
6.0 SPECIFICATIONS
7.0 APPENDICES
ROTARY VANE VACUUM PUMP (OPTIONAL)
PRESSURE TRANSDUCER (OPTIONAL)
EDGETECH INSTRUMENTS INC. DEW POINT HYGROMETER SAMPLING
BASIC HUMIDITY DEFINITIONS
BATTERY MATERIAL SAFTY DATA SHEET (FOR -C1 ONLY)
Model 1500
Dew Point Monitor
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Edgetech Instruments Inc.'s Commitment to Quality
To Our Customers:
Thank you for purchasing one of our products. At Edgetech Instruments Inc., it is our policy
to provide cost-effective products and support services that meet or exceed your
requirements, to deliver them on time, and to continuously look for ways to improve both.
We all take pride in the products we manufacture.
We want you to be entirely satisfied with your instrument. The information in this manual will
get you started. It tells you what you need to get your equipment up and running, and
introduces its many features.
We always enjoy hearing from the people who use our products. Your experience with our
products is an invaluable source of information that we can use to continuously improve
what we manufacture. We encourage you to contact or visit us to discuss any issues
whatsoever that relate to our products or your application.
The Employees of Edgetech Instruments Inc.
Model 1500
Dew Point Monitor
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1.0 GENERAL DESCRIPTION
The Edgetech Instruments Inc. Model 1500 Battery Powered DPM is an integrated system
including a microprocessor-based instrument, a chilled mirror dew point sensor, a sample flow
meter and associated tubing and fittings.
The Standard Instrument includes: (Other options available)
An eight-digit, alphanumeric, LED display to report the dew point and system status.
Periodic sensor balance check.
Programmable Alarm Set Point with visual and contact closure alarm indications.
Two SPDT (Form C) Alarm Relay.
4 - 20mA analog output. FIGURE 1.1 CASE DIMENTIONS
Model 1500
Dew Point Monitor
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2.0 SAMPLE CONNECTIONS
2.1 SAMPLE CONNECTIONS
The sample may be brought to the instrument with ¼" copper, stainless steel, or plastic tubing
and terminated in a ¼" female fitting.
Connect the sample supply line to the ¼" tubing fitting located on the panel (Figure 2.2).
NOTE: The maximum inlet pressure is 150 PSIG.
Figure 2-2.0 Drawing Model 1500-C1 & Model 1500-C2
Figure 2-2.1 Drawing Model 1500-C1-Sx “underneath”
Figure 2-2.2 Drawing Model 1500-C1-DsX “Insertion Probe”
2.4 ALARM RELAY CONNECTIONS
When the programmed Alarm Set Point conditions are meet, the alarm relay will be energized.
Before connecting any device to the Alarm Relay contacts, check the contact ratings in the
Specifications section.
1. Connect one of the signal wires to the CA (Center Arm) and the other wire to either the NO
(Normally Open) or NC (Normally Closed) terminal. Which ever is preferred by the installer.
(See figure 2.3)
2.5 ANALOG OUTPUT CONNECTIONS
“4-20mA out”. All connection can be made at terminal strip. (See figure 2.3)
1. Connect the high signal wire to the “+” terminal and the low side to the “-“ terminal.
2.6 SERIAL PORT OUTPUT CONNECTIONS (Optional)
1. “RS232 out”. (See figure 2.3)
Model 1500
Dew Point Monitor
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FIGURE 2-2.0 TOP & BELOW PANEL LAYOUT
Model 1500
Dew Point Monitor
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FIGURE 2-2.1
Model 1500
Dew Point Monitor
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FIGURE 2-2.2 Model 1500-C1-DSx
Model 1500
Dew Point Monitor
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FIGURE 2-3 WIRING CONNECTORS
Model 1500
Dew Point Monitor
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3.0 FUNCTIONAL DESCRIPTION
The front panel of the Model 1500 Battery Powered DPM consists of an LED Display and two
push-buttons.
1.) MABC- Manual Automatic Balance Cycle
2.) DISPLAY “SCAN”- Allows viewing of all Parameters or selection of desired measurement.
3.1 Display
The eight character alphanumeric LED display is used to display dew point data
and status messages.
Dew point data is displayed as “DP 34.8 F”, with the units in degrees C or F. (See Set-Up
section)
When a status message is necessary, the display will alternate between the data and the
message at about 2 second intervals.
The possible status messages and their meanings are:
“ABC CYCL” : Indicates that an Automatic Balance Cycle is in progress.
During an ABC Cycle;
The mirror is heated above the ambient temperature for a period of 1 to 3
minutes as determined by the last measured dew point.
After sufficient time has elapsed to ensure that the mirror is dry, the reflected light level of
the mirror is measured and if necessary, adjusted to the reference level.
After the adjustment is made, the instrument will begin cooling and seeking the dew
point. When a stable lock on the dew point is achieved, the “ABC CYCL” message will
disappear, and normal operation will resume.
The analog output is held to the dew point value just before the cycle started until the
completion of the ABC cycle.
If an alarm condition is present when the ABC cycle begins, the audible alarm and the
ALARM display are disabled but the Alarm Relay remains energized.
“ ALARM”: The Alarm Set Point has been exceeded. The Alarm Relay will be energized.
“CLN MIRR”: During an ABC Cycle, the condition of the sensor mirror and optics are
analyzed and a correction is made for changes in the reflectivity since the last cycle. If the
mirror reflectivity has decreased beyond the automatic correction range, this message will
appear at the end of the ABC cycle and indicates that the sensor mirror needs a manual
cleaning. Perform the “Mirror Cleaning Procedure” in the MAINTENANCE and
CALIBRATION Section.
Note: The instrument may appear to operate normally with this message present, but
the data should not be relied upon, until the appropriate maintenance is performed.
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