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Summary of Contents for General RHMG650
- Page 1 9-IN-1 THERMO-HYGROMETER/ MOISTURE METER USER’S MANUAL RHMG650 Please read this manual carefully and thoroughly before using this product.
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Page 2: Table Of Contents
General Controls ........ - Page 3 Behind the back cover of the RHMG650 are two metal plates. When the meter is powered on, the plates are given small and opposite charges. The potential difference causes current to flow, creating a three-dimensional electric field.
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Page 4: Key Features
WHAT’S IN THE BOX The RHMG650 comes in a soft pouch inside an illustrated box. Also inside the pouch are a pin-type moisture probe, a sensor protection cap, a “9V” battery and this user’s manual. PRODUCT OVERVIEW Fig. - Page 5 Fig. 1. The controls and physical structures of the RHMG650 A. Humidity/temperature sensor B. Removable hanger tab C. LCD D. ON/OFF HOLD button. With meter off, pressing button powers it on. With meter on, briefly pressing button freezes primary and secondary readouts;...
- Page 6 Fig. 2. All possible display indications : Maximum & minimum value indicators M: Mode selector : Data hold indicator : Relative humidity mode indicator : Primary readout : Absolute humidity mode indicator : Secondary readout [Upper] : Dew point mode indicator : Recall mode indicator : Vapor pressure mode indicator : Record number indicator...
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Page 7: Setup Instructions
APO will not appear on the LCD. SELECTING A PARAMETER The RHMG650 can measure and display the value of eight different moisture-related parameters. When the meter is in measurement mode, you select a parameter by pressing either the UP> and <DN buttons to move the M pointer on the top line of the LCD directly above it. -
Page 8: General Controls
GENERAL CONTROLS Changing measurement units. By default, the RHMG650 uses Imperial units for all parametric readouts. To switch to metric units, press the UNIT button. Ambient temperatures and dew points will then be displayed as °C rather than °F; absolute humidity values will be stated in g/m rather than in mg/L;... -
Page 9: Recalling Stored Readings
SETTING ALARMS The RHMG650 allows you to set alarms that will repeatedly sound the beeper if the measured RH level or the moisture level of a material (measured by either the pinless or pin-type sensor) is above or below a certain value. - Page 10 LOW setpoint. It also causes LOW to disappear and returns the RHMG650 to operation in real-time RH measurement mode. To disarm any of the six alarms (HIGH and LOW for RH, MOIST INT and MOIST EXT), you must reset its setpoint to 100.0% or 0.0% by pressing the UP>...
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Page 11: Measuring Moisture Levels
1. Use the UP> or <DN button to move the M pointer above MOIST EXT. 2. Insert the plug of the probe into the jack on the bottom of the RHMG650. 3. Remove the protective cap from the business end of the probe and set it aside. -
Page 12: Checking Calibration
One reference salt should produce a reading of a 33%; the other should produce a reading of 75%. Two salts of this type are available from General: the HR33 (33%) MgCl Calibration Salt and the HR75 (75%) NaCl Calibration Salt. -
Page 13: Specifications
SPECIFICATIONS Ambient Temperature Measurement Range -20° to 167°F (-29° to 75°C)/±3.6°F (2°C) Ambient Temperature Measurement Accuracy ±3.6°F (2°C) RH Measurement Range 0 to 100% RH Measurement Accuracy ±2.5% from 11 to 90%RH; ±3%RH elsewhere Absolute Humidity Range 0.5 to 240mg/m (mg/L) GPP Range 0 to 999 GPP (0 to 160g/kg) -
Page 14: Operating & 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 15: Return For Repair Policy
Customer Service to obtain an RGA (Return Goods Authorization) number before forwarding the unit via prepaid freight to the attention of our Service Center at this address: General Tools & Instruments 80 White Street New York, NY 10013... - Page 16 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 RHMG650 User’s Manual Specifications subject to change without notice ©2013 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS. MAN# RHMG650 6/12/13...