HT-4000/HT-4000F THERMO-HYGROMETER Owner’s Manual Versions 1.0, 1.1 Delmhorst Instrument Co.
GENERAL DESCRIPTION & FEATURES Thank you for your purchase of Delmhorst Instrument Co’s HT-4000 handheld thermohygrometer. The HT-4000 offers the latest in features and functionality. , The meter is easy to operate, measures ambient temperature, relative humidity, and calculates dewpoint, absolute humidity (grains per pound), and vapor pressure. We recommend that you read the following pages in detail to take full advantage of all that the HT-4000 has to offer.
OPERATING INSTRUCTIONS -USER GUIDEThis guide provides step-by-step instructions on powering up, using and powering down the meter. NAVIGATION: The meter uses an on-screen, menu-driven approach to navigate through the meter features, allowing for an intuitive understanding of keypad functions. Each screen presents the user with a number of selectable options. One of the options is always selected and the user can move (navigate) the selection to any other available option.
INSTALLING THE BATTERY: The battery compartment is located on the underside of the case, at the bottom of the handle. 1. Open the battery compartment by sliding the lid back while pressing on the release indent. 2. Ensure correct polarity, and push the battery in flush with the bottom board until the connectors snap together on both sides. 3. Replace the battery compartment lid.
3. The meter will display the main RH Measurement screen, as shown below: 4. The meter will begin taking readings. As a default setting the RH reading will be the most prominent on the screen. If you would like to make another variable (temperature, GPP/GPK, PSI/KPA or dew point) the prominent reading, use the and keys to highlight your selection. Press the SELECT key to choose that variable. TO POWER THE METER DOWN: 1.
TO HOLD METER READINGS ON-SCREEN 1. To hold a reading on-screen while in measuring mode, press the SELECT key. 2. Press the SELECT key again to resume taking continuous readings. MEASURING RELATIVE HUMIDITY IN CONCRETE FLOOR SLABS IN ACCORDANCE WITH ASTM STANDARD F2170 – USE SENSOR RH/T-S3 Select test locations to provide information about moisture distribution across the entire concrete slab, especially areas of potentially high moisture, or if the slab is thick (>4 in.) and air circulation is poor.
6. Alternately, insert the RH sensor into the sleeve immediately after setting the sleeve. Readings can then be taken as soon as the hole has acclimated. The complete ASTM document is available at: http://www.astm.org/Standards/F2170.htm CAUTION - ABOUT THE RH/T SENSOR Continued exposure to high temperature and humidity, chemical vapors, and any other corrosive environment will accelerate inevitable sensor aging, loss of calibration, and possible permanent damage.
warranty period of the meter/sensor, you find any defect in material or workmanship, return the meter or sensor following the instructions in the “Service for Your Meter” section. This warranty does not cover abuse, alteration, misuse, damage during shipment, improper service, unauthorized or unreasonable use of the meter or sensor, batteries. . If the meter/sensor have been tampered with, the warranty shall be void. At our option, we may replace or repair the meter/sensor.
