DWYER INSTRUMENTS, INC. Phone: 219/879-8000
Contents
1. an o 20 39 a N aae AA sD E MASTER amp prow OUTLET se amp URE 1000 P amp MAX PRESS Tantats w pran Maica tite ine MEE sAN TE s AERIAN Saeed nd CAT NO aMV l yates Series RMV Rate Master Dial Type Flowmeters pro vide accurate dependable measurement of water flows to 20 GPM Installed in line they employ a target type ele ment linked to a flexible leaf spring which deflects in pro portion to the force generated by the flowing medium A magnet attached to the free end of the spring drives a mating magnet to which the indicating pointer is attached Because the spring magnet assembly is isolated from the mating magnet pointer assembly by a wall in the brass casting there is no direct mechanical linkage This means units can easily withstand over range flows to 150 without damage and there is no path for leaks This con struction also allows units to be specially calibrated for dark and or opaque liquids which would be impossible to see with typical rotameter style instruments Models are available with 1 2 3 4 or 1 female connections CALIBRATION All Series RMV flowmeters are calibrated at the factory for mounting with scale vertical and flow from left to right when facing unit They must be used in that position for accurate readings If flowmeter was specially calibrated for some other position it will be marked accordingly These flowmeters will normally r2. mounting position To replace the cover align the 2 1 8 slots on the edge with matching 1 8 projections on the case adjacent to the point er bumpers Install the bezel ring hold cover in place with palm of hand and turn ring clockwise until tight POINTER POINTER AXIS BRASS KNOB HOLD STATIONARY BRASS BLADE ADJUST AS NECESSARY Copyright 2003 Dwyer Instruments Inc Printed in U S A 6 03 MOUNTING In Line Mounting Flowmeter may be installed in line sup ported only by the piping A square wrench surface sur rounds the outlet port to aid in assembly Surface Mounting Drill 4 3 16 diameter holes in the panel using dimensions shown in the drawing below Attach with 6 32 machine screws of appropriate length For many metal panels the 5 16 screws included can be used Flush Mounting f required re zero flowmeter before panel mounting Provide a 4 3 4 120 mm opening in panel Place flowmeter into opening and attach 4 mount ing lugs to rear of case with 6 32 X 5 16 machine screws Secure unit in place by tightening 4 6 32 X 3 1 2 screws through the mounting lugs against the rear of the panel OPERATION If flowing media is dirty install a 50 micron filter upstream from the flowmeter inlet After all connections are complete introduce flow as slowly as possible to avoid damage With liquid flows it may be necessary to purge air from the sys tem before pointer readings stabilize MAINTENANCE
3. The moving parts of these flowmeters need no routine main tenance or lubrication The only adjustment is the zero set ting which should be checked periodically Units in need of repair should be returned to the factory prepaid Field repair is not recommended FR 50 440721 00 Rev 1
4. etain their original accuracy for the life of the device If at any time you want to check calibration do so only with instruments of certified accura cy Do not attempt to check Dwyer RMV Rate Master flowmeters with other flowmeters piped in a series Even minor variations in piping and back pressure can cause a significant difference in indication Your Dwyer flowmeter may be returned to the factory for a calibration check at no charge This no charge check does not include written cer tification or any repairs necessary to restore proper opera tion DWYER INSTRUMENTS INC P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A 4 346 DIA HOLES IN PANEL FOR SURFACE MOUNTING ON A 4 5 16 1095 BOLT CIRCLE Bulletin F 52 SPECIFICATIONS Service Compatible liquids Wetted Materials Brass copper 302 SS sintered bari um ferrite Temperature Limits 20 to 200 F 6 7 to 93 C Pressure Limit 1000 psig 68 9 bar Pressure Drop 0 5 GPM 3 2 PSID 0 10 GPM 5 3 PSID 0 20 GPM 10 4 PSID Accuracy 2 of full scale Size Diameter dial face 4 101 6 mm Process Connections See Chart Maximum Flow 1 5 x full scale reading Weight 9 Ib 4 08 kg Model Number Range GPM Water 1 female NPT 1 female NPT 1 female NPT female NPT female NPT 3 female NPT female NPT female NPT female NPT Phone 219 879 8000 www dwyer inst com Fax 219 872 9057 e mail info dwyer inst c
5. om LOCATION Select a location where the flowmeter can be easily read and where the temperature will not exceed 200 F 93 C The mounting surface and piping to the flowmeter should be free from excessive vibration If pulsing flow or vibration causes excessive pointer oscillation contact factory for ways to provide additional dampening PIPING Inlet Piping It is good practice to approach the flowmeter inlet with as few elbows restrictions and size changes as possible Inlet pipe should be as close to the flowmeter connection size as practical to avoid turbulence which can occur with drastic size changes The length of inlet piping has little effect on normal pressure fed flowmeters Discharge Piping Piping on the discharge side should be at least as large as the flowmeter connection Zero Setting The RMV Rate Master flowmeter is cali brated and zeroed in a specific normally vertical position at the factory If the gage is used in any other position it may be necessary to adjust the zero setting Position changes can aversely affect accuracy If re zeroing is required hold the brass case firmly with one hand and turn the grey bezel cover counterclockwise to remove Next lift off the plastic cover Hold the 5 382 diam eter brass knob below the pointer axis stationery and adjust the rectangular brass blade between axis and knob Repeat adjustments as necessary until flowmeter reads exactly zero when held in its intended
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