Edgetech 2000 Series User manual

MODEL 2000 SERIES DEWPRIME
DEW POINT HYGROMETER
OPERATOR'S MANUAL

v i i
Model 2000 Serie s DewPrime
Dew Poin t Hygrometers
Page
THEORY OF OPERATION.
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4.1 SYSTEM OPERATION....... . . .......... . ..
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4.2 CIR.CUIT DESCRIPTIONS................... . . ... . .............. . .. . . . ............................ . ........ . .................. .. .... 4-1
42.1 Thermoelectric Dew Point Temperature Control Circuits.... . . ............
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4.2 . 2 Sensor PRT Resistance-t<rVoltage Converter .... . . . .. .. .. .... ....... .. . . ... ....... ...... ..... . .... . ... .... . .. . .. 4-3
4.2.3 Automatic Balance Control Circuits................. . .. . ... .................... .. ........... ... ............. ...... .. .. 4-3
42 . 4 Alarm Setand Protection Circuits........................ . . .......... . ...... . .................... ... .. . ........ .. . ... .. 4-3
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MAIN1'ENANCE AND C RATION............................................ . ................ . .... . ........................... 5-I
5.1 ROlJTINE MArn'IENAN"CE
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CLEANmG.... . . ........ .. ......... .. .... .. .. .... .. ... ..... ...... .. . .. .......... .. .. .. . ... .... .. ..... .. .. .. ........ .. .. .. .. ... 5-1
5 . 4 CALffiRATION OF PRT .. .. .. .. .............. ........ . .......... .... .. ... .. . ... . . .. . .. ..... .......... . .. .. ................... . .. . .... . 5-l
5 . 5 CALIBRATION OF THEPRT AMPLmER..........
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5 . 7 'WET1'ED PAR.TS.
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5 . 8 SUGGESTED SPARE PAR.TS .. ............... .. .. ............ . .... .. . .. .......... .. ........ . .... .. ... .. . .. .................. . .. .... 5-4
TR.OUBLESHOOTIN'G AND RE P AIR...
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6.2 TEST POrnTS . ... . ............. . ......... .. ....... .. . ....... .............. . ..... .. ......... . . .. . . ............. .. .......... . .................. 6-1
APPENDIX-BASIC HUMIDITY DEF1NITION S . ....
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CUSTOMERSERVICE ANDRMA FORM

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WARRANTY STATEMENT

Model2000 Serie s DewPrime
Dew Point Hygrometers
viii
List of illustrations
Figure Page
1-1 EdgeTech Model 2000 Series.
DewPrime Dew Point Hygrometers......... . ...... . .....................
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1-2 Rear Panel, EdgeTech Model 2000 Series DewPrime Dew Point Hygrometers.......... . .
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2-1 Suggested sampling
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2-2 Typical sample line material response characteristics...
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2-3 Flow corrections for variousflow pressures........................................................................... . ........ 2-7
2-4 Flow corrections for various gases.......
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3-1 Front panel, EdgeTech Model 2000 Series DewPrime Dew Point Hygrometers........................ ... . 3-2
4-1 Block diagram of
EdgeTech Model 2000 DewPrime Dew Point Hygrometers.............................. 4-2
List of
Tables
Table
3-1 Identification of keys on front panel
keypad................................................................................... 3-1
3-2 Identification of :front panel indicator s........................ .... ....... .... ............ . ........ . ................................ 3-4
3-3 ImLP menu . ......
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3-5 Default programmable parameters ...... . ............................................................................................ 3-9
6-1 Troubleshooting chart:preliminary checks...................................................................................... 6-2
6-2 Fault isolation................................................................................................................................... 6-3

Model2000 Serie s DewPrime
Dew Point Hygrometers
Page
2.13
2.14
2.15
2.16
RECO 1v.t1tr1END ED HARDWARE . . .. .. .. ... . ... . ... . . .. . .. ....
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PRESSURE l\1EAS S........... . ................. . . .. ........
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CLEANmG 11iE S LmG SYSTEM............... .. ......... ... .. . .... . ...............
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3.6
KE'YP.AD IDENTIFICATION .......... ...... ............... ... . .. .............. .. .............
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KEYPAD LOCKO'UT SEClJRITY· · ·
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RS-232 SERIAL PORT....
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3.7
RS-232 COMMANDS ANDPARAMETER
SETIIN G ...........
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3.7 . 1
3.7.2
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3.7.7
3 . 7.8
3 . 7.9
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3 . 7.1 0 Poll for Dew Point. . .. . ......
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Model2000 Serie s DewPrime
Dew Point Hygrometers
12 Number ofPoints t o Average ................. . .. ...... ... .. ....
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DEFAULT PROGRAMMABLE P TER S ... .. .... . . ............... ... . .......... . . .. ..... . ..................
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vi

Contents
Model2000 Serie s DewPrime
Dew Point Hygrometers
Page
INTRODUCI'IO N .. . .. .. .
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1 . 1 GENERAL .. ... . . .. .. .. . ... . ... .. . ...... . ... . .. . .. .. ... . . .. . . ...... ...
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1 . 2 DESCRJPTION .. ... . . . .. ... . ..
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1.3 Al.ITOMA.TIC BAI..ANCE CON"fR.OL.............. . ........ ........... . ...... .. . ... .. .. ..... . ... . .... . .....
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1 . 4 PROGRAl\.WABll.,ITY". . . . . .............. . ................ ..... . . .... .. .. . ...... ..... ... ... . .. .
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1.5 OPTION S ... . . .. . ... . ...............
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1.5.1 Remote Mounting . .... .. . .. . .... .. ........ ... ...... ................... ....... .. ... .. . .... ... .....................
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1 . 5.3 Sample System . Module
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1.5.4 MirrorMicroscope.. . ... . .. . ............................... . .. .. ......... . ........ . ..... . ......... . ............... . .. ..
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1.5.5 Explosion-Proof Housing....................... . . .... . .............................. .. ..... . .............. . ......... . ...... 1-4
1.5.6 Isolated4-20 ma.............. .. . .. .................... .. ... .. .. ... .......... . ................. .. ... ...................... .. ..... 1-5
1 . 5 . 7 ln.-Line Filter.....
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1 . 6 SPECIFICATIONS .. . ....... ............ ..... .. .. . .................. . ..... .. . . .. ..... ..... . .... .. . ... .. ... .. . .....
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IN'STALLATION
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2.1
lJNPACKIN'G...... . ............. ... . .. ...... . ................... ... . . ......... ... ............... ....... .. . ..................... . ...... . ... . .
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2 . 2
MOUNI'rn'G....................... . . ....... ..................... .... .
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2.2.4 Rem.ote Senso r Mounting....... . .. ........... .... . ....... .. . ......... . .... .. . ............. .. . . ................... . . . .......
2-1
2 . 3
COOLANT CONNECTIONS.... .. ....................... .. .. . ........................ . ..... . .................. .. ........ . ..........
2-1
2 . 4
1El\1PERA11JRE L S......... .
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2.5
WIR.IN"G
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2-2
2 . 6
Al--miENT 1El\1PERA TI.JRE PROBE....... . ..................... .
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2-2
2 . 7
PLtJh.miN'G CONNECTIONS . ...... .. ........... ............. . .. .. ...... .. ... .... .. . .. .. .. . ........ .. .. ............. ......... .. ....
2-2
2 . 8
SAI\1PLIN'G
CONFIGtJRATIONS . . ...... . ................... .. .. ........... .. . . ... . ..... ... .. . .... .
.
.
.. ......
........
... . .... .. . ..
2-3
2.9
PREHEATING SENSOR AND SAMPLE LINES.. .
.
.
................................... . .. .. ............. . ... . .. .. ......
2-3
2.10
SELECTION OF COI\iPONENTS AT LOW DEW POINTS...... .
.
..
. . ......... .. .
.
. . ........ ...... . .. . ....... .
.
.
...
2-4
2 . 11
MA.1'ERIAL MOISTIJRE PROPER11ES.. . . .... .......... ....... .. .. ........... .
.
..
. ... . .... ..... .. ........ .
....
. ..... . .. .... . ..
2-5
2 . 12
SELECTION OF SAMPLIN G
PUMPS . ...... .. . ... . ........ .. . . .. . ... ... ..... .. . ..... . ... .
.
.
.. .. ................ .......... .. . ..
2-5

v

Model 2000 Series DewPrime
Dew Poin t Hygrometers
EdgeTech's Commitment to
Quality
To Our Customers:
Thank you for purchasing one of our products. At EdgeTech, 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 ofEdgeTech
EdgeTech
19 Brigham Street, Unit 8
Marlborough, MA 01752
Phone: 508 - 263 - 5900
Toll Free : 800-276-3729
Fax : [phone]
E-Mail: h2o@edgetec h .com
www.edgetech . com
iii

Introduction

T
.....
.!!!!.. Edge Tech
Model 2000 Series DewPrime
Dew Point Hygrometers
Introduction
1.1 GENERAL
he EdgeTech Model 2000 Series DewPrime
Dew Point Hygrometer (Figure 1-1) is a micro-
processor based, programmable dew point instrument
with many built-in features. It has a measurement range
of -50 to+100°C. Two sensor types are available for a
depression of either 45 or 60°C.
The DewPrime Series is presented in two major
con-
figurations. The first , the Model 2001, is a dew point
only measurement instrument. The second, the Model
2002, is a dew point, relative humidity, and ambient
temperature measurement instrument.
This instrument has been designed to include the
most
desirable I/0 options in the standard configuration . By
" buildin g in" these options, the cost is reduced signifi-
cantly when compared to "added in" options.
Using a primary measurement technique,
including
provisions for self-checking and automatic balancing ,
the Model 2000 Series verifies its own performance on a
timed sequential basis, and is ideally suited for process
control and continuousunattended operation. Devel·
oped primarily for industrial process use, the Model
2000 Series is also useful for laboratory, scientific, and
research applications, and can be equipped with a mirror
microscope when used as a calibration standar d . It is
designed to meet reliability requirements of high
temperature, high dew point process drying and curing,
and the Model 2000 Series is finding broad applications
in areas where energy conservation is a major consider-
ation.
1.2
DESCRIPTION
The Model 2000 Series consists of a Control Unit and
either a single or dual stage dew point Sensor and a
built-in cooling jacket (S2 Sensor only). The Model
2000 Series is equipped with a timed, electronic,
automatic selfs·tandardization circuit ; a Track or Hold
output ; mode indicators; and an Alarm Set.A platinum
resistance thermometer (PRT) continuously measures
the mirror temperature, directly displayed in °C or °F on
the front of the 4-digit Digital Panel Meter, with a
resolution of 0.1°C. Standard outputs of 0 to 5 VDC and
4·20 ma are available directly on the rear panel connec-
tor (Figure 1-2).
The Model 2000·S2 is also equipped with
(I) a mirror
overtemperature protection circuit, which shuts down the
thermoelectric cooler at a mirror temperature over
100°C; and (2) an additional overtemperature circuit,
which also shuts down the cooler if base temperatures
exceed 100°C.
The Sensor
incorporates an inert Rhodium (nickel
electroplate-based surface) mirror that has a hard, bright
surface to provide superior abrasion resistance , and an
inherent antiwetting characteristic to enhance dew and
frost formation. The Rhodium mirror was developed as a
result of on-going material evaluation studies coupled
with applied research in the physics of dew and frost
formation on a mirrored surface. Extensive field tests in
harsh industrial applications show that the Rhodium
mirror provides significant advantages over conventional
mirrors, especially gold-surfaced mirrors.
The S2 Sensor has a depression capability of
60°C
(108°F) at an ambient temperature of 25°C and the S 1
Sensor has a depression of 45°C (81 °F) . Depression
decreases approximately 1o for every 3° drop in ambient
temperature and increases approximately 1° for every 3 °
rise in ambient temperature from 25°C. Depression
capability is sufficient at any temperature to permit dew
point measurement corresponding to less than 1% RH.
The S2 Sensor has a built-in cooling jacket that should
be used when the dew point to be measured exceeds the
cooling depression of the Sensor itself.When the jacket
is used, Sensor cooling is based on the temperature of
the coolant, which can be water, ethylene glycol, etc.
Response is 1.7°C (3°F)/second at dew points above 0°C
(32°F).Below 0°C, less water is available for condensa-
tion, and the response is governed by both the frost point
and the sample flow rate .
The Sensor is usually mounted on the instrument's rear
panel; however, it can be mounted remotely up to 75
meters (250 feet) from the instrument by using the
optional Remote Mounting Cable Kit.
The Model 2000 Series is equipped with convenience
features such as: (1) a Sensor spin-off cover that permits
1-1

Model 2000Series DewPrime
Dew Point Hygrometers
...
EdgeTech
------------- Introduction-------------
-
----·
--
Figure 1-1. EdgeTech Model2000 Series DewPrime Dew Point Hygrometers.
Figure 1-2. Rear Panel, EdgeTech Model 2000 Series DewPrime Dew Point Hygrometers.
1-2

Model2000 Series DewPrime
Dew Point Hygrometers
Introduction ------------
easy access to the mirror for cleaning without discon-
necting sample lines and connections (S2); (2) the logic
level front panel Automatic Balance Control (ABC)
LED is "ON" steady when the instrument is standardiz-
ing, and " ON" fla s hing when the standardization cycle
is completed and the instrument is depressing (cooling)
to the dew point; (3) Alarm set points that are program-
mable over the entire Sensor range; and ( 4) a "CON-
TAMJNATED" LED and logic level olllput that signals
when and if the Sensor miJror needs cleaning.
1.3 AUTOMATIC BALANCE CONTROL
(ABq
-ABC Cycle. Thi s cycle can be programmed to start at
any specified time and repeated at programmed inter-
val s . Thi s feature allows the user to program the ABC
cycle to occur at off-hours such as late at night or early
morning when the restandardization will cause the least
interruption of the sampling process.
--8erial Port . The serial port is RS-232C compatJ.'ble
and can be used to remotely program setup paxameters,
initiate an ABC cycle, or output data to a terminal,
printer, or computer.
-The Setup Parameters include time plus date, units
The
Model2000 Series incorporates an all-electronic,
(°F
or
0
C), ABC start time , ABC interval, alarm limits,
timed, Automatic Balance Control (ABC) circuit To
correct for changing "dry mirror' reflectance as a
fimction of contamination, the mirror is heated periodi-
cally to a temperature in excess of the dew point, and
the optical bridge output isbalanced electronically for
the present reflectance . Thisheating is accomplished by
reversal of the voltage across the th.mnoelectric cooler
inside the Sensor.
The ABC cycle in the
Model2000 Series can be pro-
grammed to start at a specific time and at any interval
thereafter . The cycle can also be initiated manually by a
pushbutton on the front panel or via the serialport This
feature increases the time interval between sensor and
sample-line cleanings without adversely affecting
overall performance.
Sensitivity to particularly troublesome impurities, such
a s salts and other soluble contaminants,is negligible
with EdgeTech hygrometers because the compensation
circuit and the low thermal mass of the Sensor design
permit use of a heavy condensate layer on the mirror
surface without need for a coalescence precool cycle or
other gimmickry to offset the servo instability, drift, and
loss of accuracy often enco1.mtered in other chilled
mirror hygrometer s .
1.4
PROGRAMM.ABn.JTY
The Model 2000 Series' fimctions can be programmed
via the front panel keypad or the RS-232 serial port.
analog outputs, baud rate, automatic data output interval,
and digital averaging interval (0-16).
-The Data Output Function sends the date, time, dew
point, and a1mn status to any serial device such as a
computer, printer, or dat a logger equipped with an RS-
232C input. The data can be sent either on command from
the external device or automatically at programmed
intervals.
-The Control Function allows the userto start an
ABC cycle, initiate xoaximmncool/heat, and send the
status such as alarm condition, ABC cycle, or maximmn
heat/cool. All commands are listed on a Help menu that
can be printed or displayed on a terminal.
-Aualog Outputs. Two outputs , 0-5 VDC and 4-20
ma, are available simultaneously at the rear terminal
connectors. They can be scaled electronically to corre-
spond to any dewpointnmge.For instance, 0 V/4 ma
can be set to -40°C and 5 V /2 0ma can be set to + 1 0°C.
Any combination of dew points within the measuring
range can be used This feature allows the user to
customize the rangefor a particular strip chart recorder
or to expand the scale for greater precision. Scaling can
be programmed easily via the front panel keypad or the
remote serial port
-Alar m Relays. Two programmable Form C relays are
provided to control valves, anmmciators, etc.Each alarm
relay can be set independently for high or low, latching
or unlatching, and at any dew point
1-3

Model2000 Serie s DewPrime
Dew Point Hygrometers
-------------Introduction-------------
1.5 OPTIONS/ACCESSORIES
1.5.1 Remote Mounting
When it isdesired t o mo\Dlt the Sensor in a location
different from the location of the Model2000 Series
Control Unit, use the Remote Mounting kit. The
Remote Mounting kit allows for distances between
Sensor and Control Unit to be as much as 250 feet (75
meters). Instructions for installing the Remote Mount-
ing kit are included with the kit. If a Remote MountiDg
kit is ordered with theModel 2000 Series Control
Unit, the Control Unit and Remote MountiDg kit and
Sensor are checked out and calibrated at the factory as
a system. However, i f a Remote Mounting kit is
ordered separately for field instaJJation, then field
calibration of the PRT Resistance-to-Voltage con-
verter will be necessary to compensate for the slight
resistance changes introduced by the change in cable
length.
1.5.2
Panel and Rack Mounting
The Panel and Rack Mounting option allows
the
Model 2000 Series to be converted from a bench-
mounted model to one tbat can be mounted in either a
panel or rack. When mounting in a panel,a template
included with the kitprovides for ease in locating the
cutout and mounting hole s . Once installed in a panel,
the hole cutouts are covered by the front panel of the
kit.
1-5.3
Sample System Module
The Sample System consists of a Neptune Dynapump
Model No.2, a Brooks 0-5SCFH flowmeter, eight
feet of tubing, and allhardware and fittings necessary
for attaching to a Model S 1 or S2 Sensor.
1.5.4
Mirror Microscope (S2 Sensor)
A Mirror Microscope option is offered for applica-
tions requiringa view of the actual dew layer esta
lished on the Sensor mirror surface . Thi s is particu-
larly useful when attempting to obtain an NIST
certified calibration when it must be determined i f the
system is controlling on the actual frost point at
temperatures below 0°C, or on supercooled dew.
Since the relationship between dew point and frost
point for temperatures below 0°C is 11 known, it is
easy to convert from one to the othe r <mce i t is verified
that control has been established on dew or frost
below 0°C. This can be determined by visually
observing the mirror surface using this Minor Micro-
scope option.
To incorporate this option, it is only necessary to
remove the S2 Sensor housing provided with the
standar d instrument and replace it withthe one
provided in the Mirror :Microscope kit. Use the same
screws that were removed from the original Sensor
housing to retain the new microscope Sensor housing,
since these screws are especially strongand will
ensure that the pressure integrity of the Sensor is
maintained.
IwARNING!
The microscope provided for this op-
tion has been pressure-tested to 1800
psi, six times the allowable workiDg
pressure of the Seasor, to eDSDI'e its
integrity. However , with the micro-
scope installed, it is recommended
that maximum SeDSOr internal pres-
sure not exceed 25 psi, since a gas
under pressure could cause the JDi.
c:roscope to become dislodged aad
bec:ome a projectile that mightiDjlll"e
someone observinl the dew layer at
the time of dislodgement.
1.5.5 Explosion-Proof Housing (S2 Sensor
only )
The
Explosion-Proof Housing is comprised of compo-
nents designed for Class 1 , Division 1, Groups C & D
hazardous enviomments vmere high accuracy , long-
term reliability, and NIST traceable dew points are
required. Power is supplied to the chilled mirror
Sensor through a remote cable from the controller,
enabling the Sensor to be mounted at a distance of up
to 250 feet. The housing assembly is not agency-In in-
1-4

- ! a Series DewPibe
DeW PoiDI Bonnnelels
1.5.6 Isolated 4-20 ma Output
The4-20
maoption i s available for applications requiring .
complete isolation between the Model200 0 Series and
the 4-20 rna output. As with the standard 4-20 rna
output, the range matches the 0-5 V output set on the
Model2000 Series. Maximum loop resistance is 1000
ohms.
1.5.7 In-Line Filter
An in-line filter can beadded to the
sampling system in
orderto provide additional protection tothe chilled mirror
and associated optics.The filter assembly is a combina-
tion particulate and coalescin g filter rated for 250 psi.
The filter head assembly is anodized aluminum. Filter
efficiency is rated at 99.99% for particulate and droplet
sizes ofO.l micron and greater.
1.7 SPECIFICATIONS
The following
specifications refer to the Model2000
Series.Thosespecifications that apply to the Model2002
only are highlighted by an (*).
Dew/Frost Point
Range
-40 to +100°C (-40 to
2l2°F)-Sl, Ds1 Sensor
-50 to +100°C (-50 to 212°F)- S2, Ds2 Sensor
-75 to+100°C (-103 to 212°F)- S3 Sensor
Accuracy
Dew
Point/Frost ::1::0.2°C (±0.36°F)
Ambient Temperature* ::1::0.2°C (::1::0.36°F)
Relative Humidity* :::1::0.5% RH, nominal
Dew/Frost Point
Temperature Sensor
3-wire Platinum Resistance
Thennometer
(PRT), 100 ohms at 0°C, nominal
Depression
45°C
(81°f), nominal- S1, Ds1 Sensor
65°C ( ll7°F), nominal- S2, Ds2 Sensor
95°C (171°f), nominal- S3 Sensor
Relative
Humidity Range
5 to 100%,
no minal-S1, Ds1 Sensor
1 to 100%, nominal-52 , Ds2 Sensor
<I% to 100%, nominal-53, Sensor
Ambient Temperature Range*
-50°C to 130°C (-58°F to
266°f)
Auxiliary Coolant
Water (or
other)-2liters/minute (0.5 gallon/
minute) at 100 psig maximum, to augment
depression capability of Sensor when
necessary
S1
Sensor- Coolant port standard
S2 Sensor- Coolant port standard
S3 Sensor- Coolant port standard
Sensor Material
Rhodium orNickel Chromium
mirror,glass,
epoxy,isofoam insulation, anodized aluminum
sensor body.
Remote Sensors
Up to 75 meters (250
feet)
Depression Slew Rate
1.7°C
(3°F)/second max., above 0°C
Repeatability
±0.01 oc (0.2°F)
Hysteresis
None
Sample Flow
Rate
0.25-2.5
liters/minute (0.5-5.0 SCfH)
Sample Pressure
0-21
kglcm:t (0-300 psia )- S1, S2, S3
0-63 kg/cm2 (0-900 psia)- SIP, S2P
Operating Temperature
0 to +50°C (+32 to+122°f)- Control Unit
-50 to +70°C (-58 to +158°f) Sl Sensor
-50 to+ I oooc (-58 to +2 I 2°F) 52 Sensor
-75 to +75°C (-103 to +167°F)- S3 Sensor
1-5

Model2000 Serie s DewPrime
Dew Point Hygrometers
------------- Introduction------------
Operating Temperature
o to +sooc (+32 to +l22°F)- Control Unit
-50 to +70°C (-58 to +158op)- SI Sensor
-50 to +l00°C (-58 to+212°F)- S2 Sensor
Display
4-digit LED
alphanumeric data display
0.6 in. high digits
O.l
0
C/O.I°Fresolution, (-) xxx.x CIF
Keypad
16 keys, to provide programming for Model
2000 Series functions:
0
CfO F toggle
View/change time, date, digital averaging,
baud rate
Manual Auto BalanceControl initiate
Programmable Auto Balance Control for
start time, interval, output Track/Hold
Maximum Heat toggle
Maximum Cool toggle
View/change high and low limits for
analog outputs
View/change A.l.amJ. parame
higbllow limits, high and/or low alarms,
latched or unlatched relays
Reset front panel Alarm indic:alors
(la!ched only)
Current
Imemal or Extema1 Power(Standard)
4 to 20 ma,scalable from -100 to
+ IOOOC
(-148 to +212Gf'), 1000 ohms maximum
loop resistance
Isolated (Optional)
4 to 20 ma, scalable from -100
to
+IOOOC
( -148 to + 21,2C'F), 1000 ohms maximum
loopresistance
RS-232
300/1200/2400/4800/9600/19200 Baud N8 I
25-pin D-subminiarure connector (female)
Output of time and dew/frost point during
operation.
Output interval is user proglB ' ••mahle.
Progm nming of all keypad functicms plus
poll dew/frost point, OUipUI imervaJ.s, plus
on-line Help menu.
Mirror Condition( Conmminated )
Rear panel TIL output and front panelLED
Two Alarms
Outputs
Track or Hold
Outputs (analog, digital, ala:rm.s) can be set
to Track or Hold while in Auto Balance or
Programming mode
Allalog
Voltage
(Standard)
0 to +5 VDC,
scalable from -100 to + 1 00°C
(-148 to + 2I20f), I K minimum impedance
TwoFmm C,
SPDTalarm relays rated for
3 amps at 24 VDC, 120 VAC
Alar m mode (high and low) programmable
from keypad or RS-232
Alarm set point programmable from -99.9 to
+99. ( -148 to 212Gf) from keypador
RS-232 port.
Alarms can be latched or tmlatched.
Auto Balance Control
Manual initiate of ABC at any time.
Automatic ABC with start time and interval
programmable from keypad or RS-232 port
1-6

Model 2000 Series DewPrime
Dew Point Hygrometers
Introduction ------------
Weight
Outputs programmable for Track or Hold
during ABC.
7.0 kg (15.5 pounds), desk-top version
Rack mount available
Power Requirements
100/115/230 V AC, ± 10%, 50-60 Hz,
75 "Watts max:imlDil
Fuses
240 VAC Operation-
lA,3 AG , 250 VAC, Slo-Blo
Dimensions
28.2 (W) X 13.0 (H) X 45.7 (D) em
(11.1 (W)x 5.1 (H)x 18 (D) in. ),
desk-top withS2 Sensor motmted
Mounting
Desk-top (standard)
Panel/Rack (optional)
NEMA 4 Enclosure (optional)
120 VAC Operation-
2A, 3 AG, 250 VAC, Slo-Blo
1-7