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Summary of Contents for General CIH20DL
- Page 1 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com DATA LOGGING HOT WIRE ANEMOMETER with CFM/CMM and 8:1 IR THERMOMETER USER’S MANUAL CIH20DL Please read this manual carefully and thoroughly before using this product.
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Page 2: Table Of Contents
TABLE OF CONTENTS Introduction ..........3 – 4 Key Features . -
Page 3: Introduction
For example, the CIH20DL can measure air speeds as low as 2 ft/min. A typical vane anemometer of comparable quality and accuracy cannot measure air speeds lower than 80 ft/min. -
Page 4: Key Features
The CIH20DL can be configured to display air speed in any of five Imperial or metric units, airflow volume in CFM or CMM, and temperature in degrees Fahrenheit or Celsius. The instrument’s IR thermometer, which can be precisely aimed by a low-power laser pointer, assumes by default that its target has an emissivity of 0.95, which is true for 90% of... -
Page 5: Safety Instructions
SAFETY INSTRUCTIONS CAUTION! The CIH20DL’s targeting laser is a Class II type that emits less than 1mW of power between 630nm and 660nm. Avoid direct eye contact with laser light radiation. U.S. law prohibits pointing a laser beam at aircraft; doing so is punishable by a fine of up to $10,000 and imprisonment. - Page 6 15 seconds and then automatically shuts off. Fig. 1. The CIH20DL’s controls and connectors 9. MODE SET button: When pressed briefly and repeatedly, cycles readouts to show: real- time measurements; maximum, minimum and average readings; and recalled stored measurements.
- Page 7 Fig. 2. All possible display indications Clock, backlight on and laser pointer enabled icons Secondary readout Memory Space/CLR (clear) and Memory indications X10 and X100 indications Primary readout MAX, MIN and AVG display indications DATA [#] RECALL and DATA LOG indications [PC] LINK indication [IR Temperature] HOLD indication Temp...
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Page 8: Setup Instructions
The CIH20DL also can be powered by connecting it to an AC outlet or a computer's USB port. There is no reason to do so unless you plan to use the meter for extended data logging sessions. -
Page 9: Measuring Air Speed And Temperature
To power on the meter, press the button. The display will initially show the clock icon at upper left and numbers on the primary readout counting down from 15. The numbers track the time needed to heat the hot wire to prepare it for use. After 15 seconds, the meter will be ready for use. -
Page 10: Measuring Surface Temperature
To improve your surface temperature measurements, learn to determine how close to the target the CIH20DL must be so the area whose temperature you wish to measure is within the spot area of the meter’s IR thermometer. Refer to the Appendix, which begins on p. 24, for the theory and practice of making accurate IR measurements. -
Page 11: Recalling And Erasing Stored Measurements
Fig. 7 is a flowchart of the menu made available by briefly pressing the MODE SET button. Starting from normal measurement mode, one press of the button makes all three readouts show the maximum values of the three main parameters measured since the meter was powered up. -
Page 12: Using The Advanced Settings Menu
To retrieve other triple sets of measurements in either order (newest to oldest, or oldest to newest), use the � and � buttons, respectively. For example, if the first set of values retrieved (the most recently stored) is tagged DATA2, pressing the � button would retrieve the values stored in memory location DATA1. - Page 13 Fig. 8. The Advanced Settings Menu Normal Measuring Press and hold the MODE SET button for 3+ seconds to enter/exit mode menu from/to normal measuring mode. Press the � or � button to select CMM, CFM (for Airflow Volume Air Speed or Airflow mode) or m/s, ft/min, km/h, mile/h, knots (for Air Speed mode).
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Page 14: Data Logging With A Computer
CIH20DL also can make and time-stamp up to 20,000 measurements over extended periods of time at user-selected sampling rates. These measurements, called data logs, are stored in a separate internal memory. -
Page 15: Connecting The Meter To Your Computer
Connecting the Meter to Your Computer Before using the CIH20DL to log data, familiarize yourself with how the meter and the software you have just installed work together. To begin, connect the meter to your computer by plugging the mini B-type plug of the included USB cable into the jack on the left side of the meter (Fig. - Page 16 WARNING! If your computer is running the 64-bit version of Windows7, NEVER disconnect the CIH20DL from the computer (by unplugging either end of the USB cable) without first closing the Anemometer AP (IR-A) application. Disconnecting the meter while the application is running will cause your computer to crash (shut down hard, with the same consequences as losing power or pressing and holding the POWER button) every time.
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Page 17: Using The Meter To Log Data
Because most data logging is done over a long period of time, General recommends that you change the meter’s power supply from its 9V battery to an external source of AC power before beginning a logging session. -
Page 18: Uploading Record Data
On most consumer DVRs, you can retrieve video received at any time from the present until one hour ago (unless the channel is changed). On the CIH20DL, the length of the corresponding “reverse time” interval is a function of the default sampling time. -
Page 19: Viewing Record Data Graphically
Viewing Record Data Graphically You can also view Record data by using the dashboard’s integrated chart function. With the meter connected to your computer (indicated by a green light at the upper left of the dashboard and the word LINK on the bottom line of the meter’s LCD, click on the OPEN virtual button under CHART at the bottom of the dashboard. -
Page 20: Uploading And Viewing Data Logs
Other selections in the pulldown menus that appear when you right-click on any of the three icons of the graph palette can be used to: • Make other chart items visible • Auto-scale plots along their X and Y axes •... - Page 21 Finally, note that when you upload data logs, all logs in the instrument’s memory are uploaded, not just the logs of your most recent session. To clear the data logging memory in the CIH20DL, follow the instruments for the “Clear Data Logging Memory” box of the flowchart (Fig. 8) on p. 13.
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Page 22: Specifications
SPECIFICATIONS Air Speed Measurement Range 2 ft/min to 7874 ft/min (20 mm/sec to 40 m/sec) Air Speed Measurement Basic Accuracy ±3% of reading Air Speed Measurement Resolution 0.1 ft/min; 0.01 m/s; 0.01 km/h; 0.01 mph; 0.01 knots Airflow Volume Measurement Range 0 to 2.5 million CFM (0 to 72,000 CMM) Airflow Volume Measurement Basic Accuracy ±3% of reading... -
Page 23: Maintenance Tips
Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product. In no event shall General be liable for any incidental, special, consequential or punitive damages, or for any cost, attorneys’ fees, expenses, or losses alleged to be a consequence of damage due to failure of, or defect in any product including, but not limited to, any claims for loss of profits. -
Page 24: Appendix
Tavg = (Tmotor + Tbackground) ÷ 2 Solving for Tavg, we get (200 + 75) ÷ 2 or 137.5°F., which is what the CIH20DL would display. In other words, trying to measure the temperature of the motor from 24 ft. - Page 25 To eliminate measurement error, the CIH20DL must be moved close enough so the motor is the only object in the target area of its IRT (see below figure). For a motor with an area of 1 ft and using an IRT with a D:S ratio of 8:1, the optimum measurement distance would be 8 ft.
- Page 26 NOTES __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________...
- Page 27 NOTES __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________...
- Page 28 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com...
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