Omega RH62C Manual de usuario
OMEGA
RH62C
HYGROMETER
OMEGAnetSM On-Line Service
http://www.omega.com
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omega.com
TM
1
INTRODUCTION
This instrument is a portable 3½ digit, compact-sized digital Thermo-Hygrom-
eter designed for simple one hand operation. Uses Platinum Resistance Tem-
perature Detector Pt385/1000W(Alpha=0.00385) as temperature sensor, and
uses thin film polymer capacitive type relative humidity sensor as hygrometer
sensor.
SAFETY INFORMATION
It is recommended that you read the safety and operation instructions before
using the hygrometer.
CAUTION
• Do not immerse the hygrometer sensor head into liquids since this
causes permanent damage to the sensor.
• The meter when not in use, please use protective metal cap cover the
sensor head and rotate clockwise it to extend sensors life.
The symbol on the instrument indicates that the operator must refer to an
explanation in this manual.
2
SPECIFICATIONS
GENERAL
Display: 3½ digit liquid crystal display (LCD) with maximum reading of 1999.
Overtemperature: "OL" mark indication.
Low battery indication: The " " is displayed when the battery voltage drops
below the operating level.
Measurement rate: 2.5 times per second, nominal.
Accuracy: Stated accuracy at 23°C ± 5°C, <75% relative humidity.
Temperature Coefficient: 0.1 times the applicable accuracy specification per
°C from °C to 18°C and 28°C to 50°C.
Operating environment: 0°C to 50°C at <75% relative humidity.
Storage environment: -20°C to 60°C at <80% relative humidity.
Battery: 4 pcs 1.5V (AAA size).
Battery Life: 200 hours typical.
Dimensions: 170mm(H) x 44mm(W) x 40mm(D).
Weight: 160g (including probe and batteries).
3
ELECTRICAL
TEMPERATURE
Temperature Scale: Celsius.
Temperature Sensor: RTD Pt385/1000W.
Measurement Range: -20°C to 100°C.
Resolution: 0.1°C.
Accuracy: ±0.5°C 0°C to 50°C
±1°C -20°C to 0°C, 50°C to 100°C
RELATIVE HUMIDITY
Humidity Sensor: Electronic capacitance polymer film sensor. (The sensor is
unaffected by water condensate, is immune to most reagent vapors)
Measurement Range: 0% to 100%RH.
Resolution: 0.1%RH.
Accuracy: ±2.5%RH (10% to 90%RH)
±5%RH (<10%, > 90%RH)
Sensor Response Time for 90% of Total Range: 60sec typical.
Sensor Stability: ±2%RH, 2 years typical.
4
Sensor Hysteresis (excursion of 10% to 90% to 10% RH): ±1%RH typical.
Sensor Temperature Dependence: Negligible between 0°C to 50°C.
OPERATING INSTRUCTIONS
Push Button
Display Back-Light Button
Press " " button to toggle between turn on and turn off the Back-Light.
DATA HOLD Button
Press the DATA HOLD key to enter the DATA HOLD mode, the" H" annunciator
is displayed. When DATA HOLD mode is selected, the hygrometer holds the
present readings and stops all further measurements.
Press the DATA HOLD key again cancels DATA HOLD mode, causing hygrom-
eter to resume taking measurements.
5
MAX HOLD Button
Press the MAX HOLD key to enter the MAX HOLD mode. The hygrometer then
records and updates the maximum absolute values and the MAX annunciator
appears on the display. Press the MAX HOLD key again to exit the MAX HOLD
recording mode.
In the MAX HOLD mode, press DATA HOLD key to stop the recording, press
DATA HOLD key again to resume recording.
OPERATION
1. Rotate counter clockwise to remove the protective metal cap.
2. Set the power switch to the desired %RH or °C range.
3. Read the display.
4. Cover sensor head to extend sensor life when not in use.
6
SPECIAL CONSIDERATIONS
• Before a reliable measurement can be made, the measuring hygrometer and
medium to be measured must be in temperature and humidity eguilibrium.
• Temperature measurement errors
Due to too short measurement time, sunshine during the measurement,
heating,coldouterwalls, airdraft (e.g.fans), radiatinghand and/ orbody heat
etc.
• Humidity measurement errors
Due to steam, water splashes, dripping water or condensation (not water
condensate) on the sensor etc. However, repeatability and long-term stability
are not impaired by this.
• Contamination
Bydustintheairormeasurementsinpowderysubstances.Thiscanbelargely
avoided by using a corresponding filter. The filter must be cleaned or replaced
periodically depending upon the degree of contamination of the measuring
site.
OPERATOR MAINTENANCE
Battery Replacement
Powerissuppliedbyfour1.5V(AAAsize)batteries.The" "appearsontheLCD
displaywhenreplacementisneeded.Toreplacethebatteries,removethescrew
fromthebackofthemeterandliftoffthebatterycover.Removethebatteriesfrom
battery contacts.
Cleaning
Periodicallywipethecasewithadampclothanddetergent,donotuse abrasives
or solvents.
7
WARRANTY
OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a
period of 13 months from date of purchase.OMEGA Warranty adds an additional one (1) month grace period to the
normal one (1) year product warranty to cover handling and shipping time.This ensures that OMEGA's customers
receive maximum coverage on each product. If the unit should malfunction, it must be returned to the factory for
evaluation. OMEGA's Customer Service Department will issue an Authorized Return (AR) number immediately
upon phone or written request.Upon examination by OMEGA, if the unit is found to be defective it will be repaired or
replaced at no charge.However, thisWARRANTY is VOID if the unit shows evidence of having been tampered with
or shows evidence of being damaged as a result of excessive corrosion; or current, heat moisture or vibration;
improperspecification;misapplication;misuse orother operatingconditions outsideof OMEGA'scontrol.Components
which wear or which are damaged by misuse are not warranted.This includes contact points, fuses, and triacs.
OMEGA is glad to offer suggestions on the of use of its various products.Nevertheless, OMEGA only warrants
that the parts manufactured by it will be as specified and free of defects
OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY
DISCLAIMED.
LIMITATION OF LIABILITY:The remedies of purchaser set forth herein are exclusive and the total liability of
OMEGA with respect to this order, whether based on contract warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the component upon which liability is based.In
no event shall OMEGA be liable for consequential, incidental or special damages.
Every precaution for accuracy has been taken in the preparation of this manual;however, OMEGA ENGINEERING,
INC.neither assumesresponsibility for anyomissions orerrors thatmayappearnorassumesliabilityforany damages
that result from the use of the products in accordance with the information contained in the manual.
SPECIAL CONDITION: Should this equipment be used in or with any nuclear installation or activity, purchaser will
indemnity OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
equipment in such a manner.
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