WDCFM8912 Manual final2F-062708:Layout 1 WDCFM8912 USER’S MANUAL DIGITAL AIR FLOW METER WITH CFM, BTU, TEMP, HUMIDITY, DP, FPM, MPH, KPH, MPS, KNOTS & WET BULB 6/27/08
WDCFM8912 Manual final2F-062708:Layout 1 INTRODUCTION Thank you for purchasing this digital Anemo-Psychrometer. This unique meter is designed with 7 H.V.A.C &R that must have parameters in 1. The meter is designed as battery operated for Humidity, Air Temp., Dew Point, Wet Bulb, Air Velocity, Air Volume and BTU. The sensor is built in the remote fan and is specially protected by tunable cap. While in operation, please turn on the cap to get accurate temperature and humidity readings.
WDCFM8912 Manual final2F-062708:Layout 1 6/27/08 REMINDER IMPORTANT: 1. Rotate the cover before measurement to ensure the measured data is correct. 2. The fan and meter are sold as a kit and are calibrated together. When you need to replace the fan, please see page 11 for details on fan replacement. CONTROLS AND INDICATORS LCD DISPLAY LCD DISPLAY KEY PAD 1. Power: O - Turn on the meter with auto-sleep mode. - Turn off the meter at any mode. - When the meter is off, pressing O more than two sec.
WDCFM8912 Manual final2F-062708:Layout 1 3. ENTER: - To confirm the setting & calibration. 4. Mx/Mn/Up LMx/Mn: - Pressing to view MAX/MIN/AVG value. - Press to select the value of each digit in cycle. 5. REC/START: - To start measuring volume or capacity without waiting. 6. HOLD/Down LHOLD: - In basic modes pressing this key to hold the current reading, then pressing this key again to unlock the holding. - Pressing to select the setting digit. 7.
WDCFM8912 Manual final2F-062708:Layout 1 6/27/08 BASIC MEASUREMENT Basic measured parameters of this model: BASIC MEASUREMENTS • Air temp. • Humidity • Dew Point • Wet Bulb • Air Velocity EXTENDED MEASUREMENTS • Air Volume • Sum of Volume • Capacity • Sum of Capacity When powered on, the air temperature is the default value to show on the LCD. To review the other basic parameters, just press the MODE key then each parameter will be displayed in turn.
WDCFM8912 Manual final2F-062708:Layout 1 AIR VOLUME: OUTLET SIZE While in normal MODE, long pressing MODE key to enter air volume mode. To measure the volume, the outlet size needs to be input first. There are three choices to enter the size: • Length & Width: This is the default choice. Press MHOLD key to select the setting digit first, then press LMx/Mn key to select the appropriate value (0-9). When selecting the value, the value will show from 0 to 9 in cycle.
WDCFM8912 Manual final2F-062708:Layout 1 6/27/08 displayed on top left corner and meter also beeps when time is up. (Fig. F) If no need to wait for 20 seconds, just press REC/START key to start measuring the volume right away. (Fig. F) After starting measuring the volume, the meter will automatically count the volume for 60 seconds to give a average value. (Fig. G) During this 60 second time, the vane should move along the whole outlet to cover each area so the measured data could be more accurate.
WDCFM8912 Manual final2F-062708:Layout 1 • Diameter: While in default outlet setting mode (length), pressing ENTER key for over two seconds to choose diameter setting. Press MHOLD key to select the setting digit first, then press LMx/Mn key to select the appropriate value (0-9) (Fig. I) (Fig. J) • Area: While in diameter setting mode, pressing ENTER key for over two seconds to enter area setting.
WDCFM8912 Manual final2F-062708:Layout 1 6/27/08 During this 60 second time, the vane should move along the whole outlet to cover each area so the measured data could be more accurate. The count down number displayed on the top-left corner as a reminder and meter also beeps when 60 seconds is up. After time is up, 60 seconds average volume will display on the LCD as Fig O. (Fig. N) (Fig. 0) If there are more than one outlet, you could press ENTER key again to repeat the procedure from outlet size input.
WDCFM8912 Manual final2F-062708:Layout 1 RS232 SOFTWARE SOFTWARE We have compatible software and cable which is design for the meter, please contact your supplier for details. INTERFACE OF RS232 A. 9600 bps, 8 data bits, no parity. B. Format: Tx. ASCII code by every sec. while meter is on VXXX.XMPS(FTM):TXXX.XC(F):HXX.X%: dXXX.XC(F):wXXX.XC(F): vXXXXX.XCMM(CFM): UXXXXX.XKW(BTU) Where: The 1" value is velocity, the 2nd value is Air temp.
WDCFM8912 Manual final2F-062708:Layout 1 6. E 6 a) the value is not calculated completely. 7. E 11 a) Humidity Calibration error. SPECIFICATION TEMPERATURE: -4º to 140ºF (-20º to 60ºC) Accuracy: ±1ºF (±0.6ºC), Resolution: 0.1ºF (0.1ºC) RELATIVE HUMIDITY: 0 to 100% RH Accuracy: ±3% at 10 to 90%RH (cal. temp.) ±5% at other range Resolution: 0.1 % DEW POINT: -90º to 158ºF (-68º to 70ºC) Resolution: 0.1ºC WET BULB TEMPERATURE: -7.6º to 158ºF (-22º to 70ºC) Resolution: 0.1ºC AIR VELOCITY: 1 to 114 ft/s (0.
WDCFM8912 Manual final2F-062708:Layout 1 2. If the saved S value is different from your paper, press MHOLD key to move to the digit which you want to edit and then use LMx/Mn key to change the value. 3. Press ENTER key to save new input S value and then meter will enter second value input automatically. IMPORTANT NOTE: While setting the slope, only input 5 digits after decimal point, so user need to round off the 6th digit. User should also input two digits before decimal. Example: 1. If the S value is 8.
WDCFM8912 Manual final2F-062708:Layout 1 User should also input four digits before decimal. All the Z is a negative value but LCD will not appear the negative icon. Example: 1. If the Z value is -928.8683, user should input 09 28868 2. If the Z value is -1928.868, user should input 19 28868 3. If the Z value is -89.68482, user should input 00 89685 (Fig. T) (Fig. T) RETURN AUTHORIZATION Authorization must be obtained from the supplier before returning items for any reason.
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WDCFM8912 Manual final2F-062708:Layout 1 General TOOLS & INSTRUMENTS™ 80 White Street, New York, NY 10013-3567 PHONE (212) 431-6100 FAX (212) 431-6499 TOLL FREE (800) 697-8665 e-mail: sales@generaltools.com www.generaltools.com WDCFM8912 User’s Manual Specifications subject to change without notice ©2008 GENERAL TOOLS & INSTRUMENTS™ NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS.
