Delmhorst HT-3000 User manual

HT-3000
owners manual
HT-3000.qxp:FX-2000 owners manual 4/21/09 3:46 PM Page 1
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Delmhorst HT-3000 Thermo Hygrometer

TABLE OF CONTENTS
3 Introduction
3Operation
4 Auto-Off
4 Backlight
4 Low Battery
4 Adjusting the Display Contrast
5 Operation Summary
5 Calibration & Maintenance
5 Technical Specification
hMeasurement
hAccuracy
hResponse Time
hResolution
hPower Supply
hBattery Life
6 Care of Your Meter
7 Service for Your Meter
8 Warranty
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Hold Button
On/Off Button
#
Scale
Button
$
Rotate
Button
@
!
DELMHORST HT-3000
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INTRODUCTION
The model HT-3000 is a portable, battery-powered
meter for the measurement of ambient tempera-
ture, relative humidity, and through calculation,
dewpoint and absolute humidity (grains per pound).
The display can be read in either degrees
Fahrenheit (°F) or degrees Celsius (°C).
OPERATION
1. Install the battery in the compartment located on the
underside of the instrument case handle.
2. Press and hold the ON/OFF button until the display acti-
vates. The meter is now ON. The current software version
will flash on the screen and then the meter automatically
enters its default mode: measured Temperature (°F) and
Relative Humidity (%) will appear on the display. T and
RH readings are updated at a five second interval.
3. Tap the ROTATE button to alternate between the display
of T and RH and the calculated values of Dewpoint and
Absolute Humidity. A full set of all four values is always
in the meter memory after power up. This allows immedi-
ate access to any measured or calculated value, even if the
data of interest is not currently displayed.
4. Press the SCALE (F/C) button at any time to switch
Temperature, Dewpoint, and Absolute Humidity readings
between Fahrenheit and Celsius. Absolute Humidity is dis-
played in GPK (grams per kilogram), when the HT-3000
is set in Celsius mode, and in GPP (grains per pound)
when set in Fahrenheit mode.
5. Press the HOLD button to freeze the displayed readings.
The letter H appears at the right of the first display line.
The meter stops collecting additional readings, but the
SCALE and ROTATE functions are still available. Press
the HOLD button again to return the meter to normal
operation.
6. Press and hold the ON/OFF button to turn the meter OFF.
The meter must be in normal operating mode and not in
HOLD mode to turn it off.
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AUTO-OFF
The meter automatically switches OFF after 10 minutes without
any button activity and as long as the meter is not in HOLD
mode. If the backlight is active, the auto-off time is 35 seconds.
(see below)
BACKLIGHT
The meter is equipped with a display backlight, allowing use
under poor lighting conditions. Continued use of the back-
light presents an extra drain on the battery and significantly
reduces expected battery life.
To activate the backlight, tap the ON/OFF button. Tap the
ON/OFF button again to turn off the backlight.
LOW BATTERY
A “low battery” indication will appear on the display when
voltage is no longer sufficient. Immediately replace the bat-
tery (9V Alkaline only). Typical battery life is approximately
55 hours (without backlight).
ADJUSTING THE DISPLAY
CONTRAST
The display contrast is preset in the system memory at an opti-
mal level. Under most operating conditions, no further adjust-
ment should be necessary. However, if the meter is operated in
extreme temperature conditions, some adjustment may be
desirable for optimal viewing quality.
Procedure:
1. Ensure the meter is not in HOLD mode. Press and hold the
ON/OFF button. Keep it pressed throughout the adjustment
process.
2. To turn the display darker, press and hold the SCALE (F/C)
button within 2 seconds. Release this button when desired
contrast is achieved.
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3. To turn the display lighter, press and hold the ROTATE but-
ton within 2 seconds. Release the button when the desired
contrast is achieved.
4. Once the desired contrast is achieved, release the ON/OFF
button within 2 seconds.
OPERATION SUMMARY
On/Off Hold Rotate Scale On/Off On/Off On/Off
(Hold) (Tap) +_+_
Scale Rotate
Turns meter
ON and
OFF if held
for longer
than 2 sec-
onds
Places
meter in
HOLD
mode: cur-
rent data
is held, all
data is
available
for display
Alternates
between
T/RH and
D/AH data
set dis-
played on
screen
Alternates
between F
and C
scales for
Temperature
and Dew
Point
readings
Contrast
adjustment–
turns dis-
play
lighter.
Alternates
the state
of the
backlight
Contrast
adjustment–
turns dis-
play darker.
CALIBRATION &
MAINTENANCE
Continuous exposure to dirt and dust may shorten the life of the
RH sensor and also cause the meter to go out of calibration more
quickly. Avoid exposure to liquids and other contaminants.
Suggested factory calibration interval is once a year. Field calibra-
tion is not available for the HT-3000.
TECHNICAL SPECIFICATIONS
Temperature: -20°C to 70°C, -4°F to 158°F
Relative Humidity: 0-100%RH
Dewpoint: -40°C to 70°C, -40°F to 158°F
Absolute Humidity: 1 GPP to 2000 GPP, .1 GPK to 285 GPK.
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Accuracy
Temperature: +/- 1°C over 0°C -70°C, +/- 1.8°F over 32°F to
158°F
Relative Humidity: +/-3%
Response time
Temperature: reaches 80% of full excursion in approximately
75 seconds
Relative Humidity: reaches 90% of full excursion in approxi-
mately 45 seconds
Resolution
0.1ºC; 0.1%RH
Power supply
(1) 9V Alkaline battery.
Battery life
Approximately 55 hours under constant use (no backlight) or
23 hours with backlight.
CARE OF YOUR METER
To keep your meter in good working order:
hStore meter in a clean, dry place. The protective carry-
ing case provided is an ideal storage place when the
meter is not in use.
hChange the 9-Volt battery as needed. Continued use with a
low battery may cause the meter to go out of calibration.
hClean the meter with any biodegradable cleaner. Use the
cleaner sparingly and on external parts only.
hRemove the battery if the meter will not to be used for
one month or longer.
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SERVICE FOR YOUR METER
hBefore sending in your meter we recommend you give one
of our trained technicians a call. Many times troubleshoot-
ing can be taken care of over the phone. Call us at
877-DELMHORST.
hPack your meter securely. Enclose a purchase order or let-
ter with a brief description of the problem.
hThere is no need to call us for a return authorization num-
ber if you are within the U.S. Customers outside the U.S.
must contact us for more specific instructions prior to
returning a meter. Include your name, address, daytime
phone and fax numbers or e-mail address. If you believe
the meter is under warranty, please provide the original
sales slip or invoice.
hShip via UPS, Express Mail, Priority Mail or any
overnight courier who provides prompt service. Do not use
standard parcel post.
hInsure your instrument for its full value and ship prepaid.
We are not responsible for damage in transit.
hWe do not accept COD shipments or cover any incoming
freight or duty charges on returned merchandise.
hTurnaround time on repairs is approximately two weeks.
hWe will call you with an estimate if you specifically
request one, or if we determine that the meter may be too
costly to repair.
hNon-warranty repairs will be returned via UPS/GROUND,
unless you have already established an alternate shipping
method. Payment may be made by credit card. We accept
Visa/Mastercard and American Express. When your repair
is complete, we will contact you for the credit card infor-
mation.
hWarranty repairs will be returned at no charge, if
shipped within the U. S., via UPS/GROUND. Freight
charges for expedited services (Federal Express,
UPS/1DAY, UPS/2DAY, etc…) are the customer’s respon-
sibility and will be charged as per the above terms.
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WARRANTY
Delmhorst Instrument Co., referred to hereafter as
Delmhorst, guarantees its HT-3000 meter for one year from
date of purchase. If, within the warranty period of the meter,
you find any defect in material or workmanship return the
meter following the instructions in the Service for Your
Meter section. This limited warranty does not cover abuse,
alteration, misuse, damage during shipment, improper serv-
ice, unauthorized or unreasonable use of the meter or elec-
trodes. This warranty does not cover batteries. If the meter
has been tampered with, the warranty shall be void. At our
option we may replace or repair the meter.
Delmhorst shall not be liable for incidental or consequential
damages for the breach of any express or implied warranty
with respect to this product or its calibration. With proper
care and maintenance the meter should stay in calibration;
follow the instructions in the Care of Your Meter section.
Under no circumstances shall Delmhorst be liable for any
incidental, indirect, special, or consequential damages of any
type whatsoever, including, but not limited to, lost profits or
downtime arising out of or related in any respect to its
meters or electrodes and no other warranty, written, oral or
implied applies. Delmhorst shall in no event be liable for any
breach of warranty or defect in this product that exceeds the
amount of purchase of this product.
The express warranty set forth above constitutes the entire
warranty with respect to Delmhorst meters and electrodes
and no other warranty, written, oral, or implied applies. This
warranty is personal to the customer purchasing the product
and is not transferable.
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