Hygrodynamics panel mount dew point monitor model8072kit 8072kit-230vac table of contents specifications 1
Download 54.48 Kb.
|
HYGRODYNAMICS PANEL MOUNT DEW POINT MONITOR MODEL8072KIT 8072KIT-230VAC TABLE OF CONTENTS SPECIFICATIONS 1 PRINCIPLE OF OPERATION 1 INSTALLATION 2 CALIBRATION & MAINTENANCE 2 Sensor Replacement Procedure 2 Alarm Set Point Adjustment 3 Display Units Selection 3 Recorder Output Selection 3 Electronic Test Procedure 3 SPARE PARTS 3 WARRANTY 5 DIAGRAMS LAYOUT DIAGRAM AND WIRING DIAGRAM 4 (DWG. NO. 8072KIT) NEWPORT SCIENTIFIC, INC. 8246 E SANDY COURT JESSUP, MARYLAND 20794 9632 (301)498 6700 FAX (301) 490 2313 SEPTEMBER 1993 DEW POINT MONITOR MODEL 8072KIT The Dew Point Monitor is an on line instrument for checking the operation of a desiccant dryer. The monitor samples process air from the dryer into an internal manifold containing a HYGROSENSOR which varies in resistance proportional to the dew point of the sampled air. SPECIFICATIONS Dew Point Range -40F to +15F (-40EC to -9EC) Sensor Part # 1205DM Maximum Sensor 140EF Temperature Accuracy ±2EF Alarm Set Point -10EF ( 23EC) (Adjustable, see Electronic Test Procedure) Remote Alarm Relay Normally open and normally closed contacts, Rating: 5 amps at 115VAC Recorder Output 4-20mA or 0-5V Linear Output Indicator Lights GREEN indicating acceptable "dry" condition RED indicating unacceptable "moist" condition Power Requirements 115VAC 50/60Hz, (230VAC available) Power Consumption 5 Watts Dimensions 9-1/2" x 7-1/2" x 4" Deep Weight 8 lbs. shipping PRINCIPLE OF OPERATION The HYGROSENSOR™ is excited by an internal circuit which drives the LED display and illuminates either the red or green light. The unit also displays the dew point within the range of 40EF to +15EF. A green light indicates a properly functioning desiccant dryer. High dew point will cause the relay to actuate and close the COM and NO (normally open) terminals. When the Dew Point Monitor displays a High Alarm, the following conditions should be considered: 1. There is a leak in the dryer system or sampling line. 2. The dryer is overloaded by excessively wet material. 3. The dryer has mechanical or electrical failure. 4. The Dew Point Monitor has failed (see calibration and maintenance instructions). INSTALLATION NOTE This model is shipped with the sensor not installed. Refer to the "Sensor Replacement Procedure" for sensor installation details. The Dew Point Monitor is normally used to sample air that is at a slight static pressure to enable process air to flow through the sensor manifold. Faster response may be obtained by using a vacuum pump at the manifold outlet. 1) Chose an appropriate location and panel cutout for your application. 2) Mount 8072KIT and wire voltage to the terminals labeled HOT and NEUT. 3) Connect sample airline to SAMPLE AIR INLET as labeled on drawing (Page 5). 4) Attach a length of tubing to the sample air exhaust to prevent ambient air from migrating into manifold. 5) Unit is now ready for operation. The terminals labeled NC, COM, and NO are for alarm indication. The NC and COM terminals are closed when there is no alarm. The NO and COM terminals close when alarm occurs. Under normal operating conditions, the Dew Point Monitor will respond to changes in dew point within a minute. However, when first starting up the system it may take 10-15 minutes for the reading to stabilize. This is the time required to purge residual moisture from the sample lines and sensor manifold. Progressively slowing response time is normal with sensor age. CALIBRATION & MAINTENANCE Sensor Replacement Procedure Replacement of the sensor is recommended on a yearly basis. ** Remove power to the Dew Point Monitor before servicing. 1) Disconnect the sensor cable from the manifold. 2) Remove the hex nut and slide the sensor and socket out of the manifold. Remove old desiccant capsule from manifold if present. 3) If your new sensor is packaged with a desiccant capsule, drop it into the manifold. 4) Remove old sensor from socket and press the new sensor into the socket. Then slide the sensor and socket into the manifold. 5) Replace and hand-tighten the hex nut. Alarm Set Point Adjustment 1. Locate the set point switch (SW1) and move it to the upper position (near P3). 2. Take care not to touch any terminals and apply power to the monitor. Turn monitor on and view set point on digital display. 3. Adjust set point by turning P3. When setting is satisfactory return switch to the lower position. Display Units Selection The Dew Point Monitor is factory set to display dew point in EF. To change the display, use needle nose pliers and move J10 and J11 to the top jumper location. Recorder Output Selection The recorder output is factory set for 4-20mA output representing -40EF to +70EF. The output can be changed to 0-5VDC signal by moving J9 to the upper position (refer to drawing). Electronic Test Procedure This procedure checks the operation of the circuit. Perform this procedure if the electronics are suspect.
1. Disconnect the brown sensor cable from the sensor manifold. 2. Connect the dew point monitor to power and turn it on. With sensor cable disconnected, the dew point monitor should read -40EF +2EF. 3. Place a jumper across the sensor cable. The dew point monitor should read +15EF +2EF. If display fails to read these values, contact Newport Scientific for factory service. SPARE PARTS 1205DM...........Hygrosensor ********************************************************************** HYGRODYNAMICS LIMITED WARRANTY +))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))), * NEWPORT SCIENTIFIC, INC. warrants that all equipment manufactured * * by NSI shall be free from defects in material and workmanship * * which might impair its usefulness. SELLER DOES NOT WARRANT THAT * * THE EQUIPMENT IS FIT FOR ANY PARTICULAR USE. THERE ARE NO * * WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF; * * the obligation under this warranty is limited to repairing or * * replacing, at Seller's factory, any defective parts which, when * * returned by the buyer, transportation prepaid,examination discloses * * to have been factory defective. The time limit of this warranty is * * ONE YEAR from date of shipment of new equipment, SIX MONTHS from * * date of shipment of Hygrodynamics Wide-Range Sensors and THREE * * MONTHS from date of shipment of Hygrodynamics Narrow-Range Sensors * * and repaired equipment. THIS WARRANTY IS EXPRESSLY IN LIEU OF OTHER * * WARRANTIES. Seller shall not be held liable for any special, * * indirect, consequential damages arising out of this warranty or any * * breach thereof, of any defect in or failure or malfunction of the * * equipment and materials are further subject to tolerances and * * variations consistent with usages of trade. This warranty shall run * * in favor only of the purchaser from Seller and may not be passed on * * or represented on behalf of Seller to any subsequent purchaser. * * * * * * WARRANTIES: OTHER PRODUCTS * * * * NEWPORT SCIENTIFIC, INC. makes no express or implied warranty as to * * items, which are the products of other manufacturers. Seller shall * * use its best efforts to obtain from the manufacturer, in accordance * * with its customary practice, the repair or replacement of such * * products may prove defective in workmanship or material. The * * foregoing states the entire liability in respect to such products, * * except as an authorized executive of the corporation may otherwise * * agree in writing. * * * * In the case of special equipment or modifications to standard * * equipment manufactured at the request of the buyer, under * * buyer-approved specifications, buyer will indemnify Seller against * * the risk damages due to patent infringement. * .)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))- |
Share in:
