Nova-Tech 4085 TRACEABLE HUMIDITY_TEMPERATURE DEW POINT METER - Manual (Page 2)

Traceable ® is a registered trademark of Control Company ©2009 Control Company. 92-4080-20 Rev. 3 042109
Default alarm settings
When the unit is turned on, the alarms automatically default to out-of-range set points so
that the alarms will not trigger. The default settings are:
Relative Humidity HI 101.00 LO –01.00
Temperature °F HI 221.00 LO 0.00
Temperature °C HI 105.00 LO –17.77
Dew Point °F HI 141.00 LO 0.00
Dew Point °C HI 60.56 LO –17.77
To prevent any alarm from tripping, simply set the alarm set point out of the unit’s range.
As an example, in relative humidity any alarm set point above 100 or less than zero will
never trip the alarm. To quickly reset all alarm values to the default out-of-range
condition, simply turn the unit off, wait 2 seconds, and then turn it on again.
Default alarm sounds
Three distinctive alarm sounds distinguish each measurement. The alarm sounds are:
Dew Point 1 beep per second
Temperature 2 beeps per second
Relative Humidity 3 beeps per second
Note: If two or more alarms are sounding simultaneously the sound will be heard in the
following sequence: dew point, temperature, and relative humidity.
GENERAL INFORMATION
Display
For ease of use the display is optimized at a 20-degree angle. It is best viewed by the
user when sitting or standing with the unit flat on a lab bench or desk. When viewed
straight-on the display will appear to have less contrast.
Key sound
An audible confirmation beep will be heard each time a button is pressed.
Freezing points
Dew points below freezing should be converted to frost points by using frost point
tables.
USER CALIBRATION
WARNING: User calibration adjustment will void the factory-supplied National Institute
of Standards and Technology (NIST) Traceable
® Certificate. The unit has been
calibrated against NIST traceable instrumentation.
For users wishing to check factory calibration, we suggest using a calibration laboratory
with capabilities to generate a known humidity and utilize sophisticated chilled mirror
test equipment.
Salt as a calibration standard
We do NOT recommend or use the saturated salt calibration method. NIST does NOT
use the salt method. The proper technique involved in the salt method is far more
difficult and far more time consuming than most literature suggests. Liquid volume, air
volume, sensor placement, temperature, air movement, vapor pressure, equilibration
time, and a host of other factors can all contribute to gross errors. On occasion these
errors are reproducible.
For information on the saturated salt method we suggest studying American Society of
Testing Materials Method ASTM E104 and obtaining a paper from the National Institute
of Standards and Technology JOURNAL OF RESEARCH, Vol. 81A, No. 1, pages 89–
96.
Dial hygrometers as a calibration standard
Absolutely do NOT calibrate against hair dial hygrometers. Inaccuracies in dial units
caused by age of hair and other factors can greatly affect readings. Dial units are not
sensitive to rapid changes and readings generally lag actual humidity changes by hours.
Users of some dial units have encountered errors of over 50% relative humidity.
Sling hygrometer calibration
Absolutely do NOT calibrate against sling units. Sling units are limited to the accuracy
and resolution of their thermometers. Temperature errors of as little as 0.05° can cause
significant humidity errors. Unfortunately temperature, time, air volume, and technique
can cause reproducible, but large errors. In low humidities, in small spaces, the addition
of a wet wick may change the actual humidity. If too much swing time is taken, a
partially dry wick produces errors. If too little swing time is taken, sufficient evaporation
may not have taken place to cool the thermometer. Sling units generally measure crude
averages of a large volume of air. Users of some sling units have encountered errors of
over 50% relative humidity.
ACCESSORIES AVAILABLE
Cat. No. 1023 AC Adaptor for continuous use
An accessory adaptor is available for continuous AC operation. When using
the adaptor, the non-rechargeable lithium or alkaline battery must be removed.
Never use the adaptor with a non-rechargeable battery. A battery is NOT
required to use the adaptor. A rechargeable NiCad battery may be used with
the adaptor. The adaptor will simultaneously power the unit and recharge a
NiCad battery.
Cat. No. 4020 Rechargeable NiCad Battery
Requires use of Cat. No. 1023 AC Adaptor for continuous use.
Cat. No. 4099 Data Acquisition System Accessory
Powerful and easy to use computer data capture/data logging program works
with Traceable
® Instruments with computer output. Records interval readings
from 1 to 10,000 seconds; displays minimum/maximum readings; and utilizes
an alarm mode that permits the user to be notified visually, audibly, and by
email when an alarm is triggered. Data is stored to a file that can be printed in
any report or spreadsheet format. Networking server/client capability allows
the captured data to be monitored on a remote workstation and/or by email. It
is designed to work with Windows
® 98/Me/NT/2000/XP/Vista. Includes a CD, a
6-foot cable (supplied USB and serial connections) that plugs into the
instrument and computer. Accessory extension cables expand cable length to
300 feet.
ALL OPERATIONAL DIFFICULTIES
If this meter does not function properly for any reason, please replace the battery with a
new high quality battery (see “Battery Replacement” section). Low battery power can
occasionally cause any number of “apparent” operational difficulties. Replacing the
battery with a new fresh battery will solve most difficulties.
Frozen display
Turning the unit on and off rapidly may lock (freeze) the display. Wait 2 seconds before
switching the unit from off to on. If a “frozen display” occurs, remove the battery, wait 1
minute, insert the battery, and resume operation.
BATTERY REPLACEMENT
A faint display or no display are indicators that the battery must be replaced. A BAT
indicator appears on the display when the battery is low. Remove the battery cover on
back of the unit. Remove the exhausted battery and replace it with a new 9-volt alkaline
or lithium battery. Replace the battery cover. Do NOT use a heavy-duty or regular
battery since they do not have sufficient power. If BAT indicator appears on the display
when using a NiCad battery, recharge the battery.
Cat. No. 4080 Traceable ® Humidity/Temperature/Dew Point Meter (Universal)
Cat. No. 4083 Traceable ® Humidity/Temperature/Dew Point Meter (Basic)
Cat. No. 4085 Traceable ® Humidity/Temperature/Dew Point Meter (Fast-Response)
WARRANTY, SERVICE, OR RECALIBRATION
For warranty, service, or recalibration, contact:
CONTROL COMPANY
4455 Rex Road
Friendswood, Texas 77546 USA
Ph. 281-482-1714 Fax 281-482-9448
E-mail [email protected]
www.control3.com
Control Company is ISO 9001 Quality-
Certified by DNV and ISO 17025 accredited
as a Calibration Laboratory by A2LA.