DVR-380 - J-KEM Scientific
Contents
1. OF OF ON OF ON Oj ON OFF OFF _ OFF ON OF OFF _ ON OR OF OF IS oe do OF 3 3 Adjusting the Amount of Hysteresis Whenever a setpoint pressure is entered by the user a pressure offset that is 2mm Hg factory default above the setpoint is automatically entered into the meter The purpose of the offset is to limit how often the vacuum pump is turned On and Off to maintain system pressure The amount of offset or hysteresis can be set by the user by following the procedure below The allowable range for hysteresis is 0 0 to 760mmHg appears in the display then release both keys Press the AN key once and the word bAnd will o in the display Next hold in the key then while holding in the key press the AN or W keys until the amount of desired hysteresis appears Press and hold in both the W and AN keys on the front of the digital meter until the word tunE 2 in the display For example if you want 10mm of hysteresis hold the AN or W keys until 10 shows in the display Let go of all the keys Press the AN key 5 times until the word oFSt appears in the display Next hold in the key then while holding in the key press the AN or N keys until the amount of desired hysteresis appears in the display For example if you want 10mm of hysteresis hold the AN or W keys until 10 shows in the display Let go of all the keys NOTE The value entered in Step 3 must be the same value t2. in step 5 is performed 5 Adjust the Zero pot until the reading on the Meter meter matches the actual pressure 6 Turn the vacuum pump off and unplug the OUTLET port Adjust the Span pot until the meter reads the actual barometric pressure in the lab 7 Turn the controller off and replace the cover former Looking in from the top of the vacuum regulato Section 4 Trouble Shooting Symptom Corrective Action The pump does not start The pump does not start at all Verify that the circuit breaker protecting the pump has not tripped Reset the circuit breaker The pump starts when the system is Diaphragm pumps are designed to start when the diaphragm is at first turned on but not when the or close to atmospheric pressure but will not start reliably when system is evacuated the diaphragm is under vacuum pressure The line or hose that connects the vacuum pump to the DVR 380 must have a pin hole size leak so that this portion of the system can return to atmospheric pressure when the pump is not running Usually normal leaks in the system that connect the DVR 380 to the vacuum pump are sufficient for this purpose but if this part of the system is plumbed leak proof the user may have to intentionally introduce a small leak to allow the pump to return to atmospheric pressure 10 Section 5 Factory Default Parameters DVR 380 Spr Soa pe Sa 10 SPIP none dosp 0 set Rel Oii
3. Temperature Control for Research and Industry Digital Vacuum Regulator User s Manual Model DVR 380 KEM Scientific Inc Instruments for Science from Scientists LI g ing an OO OO OO OO OO OO EE ET PD R DR T oh OU lh E eo ETERIK NIE E LENTE NI RE LENTE NIE E LEE ETETETT TETTETETT HITI KTI KILET TETIT PERLILERLIIE LT IE LEK TI E E LED LT TT E TJE ELLE L LT TH ETI EL LEL LELI III TI lil INDEX SECTION PAGE SAFETY NOTICES ceriose ee a ree 3 1 QUICK OPERATING INSTRUCTIONS 04 4 2 REGULATOR DESCRIPTION e 5 3 OPERATIONS GUIDE est ip 6 3 1 How the Controller Adjusts Pressure aa 0 eee eee 6 3 2 Adjusting the Vacuum Valve Delay Time 005 7 3 3 Adjusting the Amount of Hysteresis 0 0 0 0 eee ee eee 8 3 4 Changing the Display Resolution 0 0 cece ees 8 3 5 Correcting Offset in the Displayed Pressure 005 9 4 TROUBLE SHOOTING 0 0 0 ne 10 5 FACTORY DEFAULT PARAMETERS 11 Warranty J KEM Scientific Inc warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period of 6 months from date of purchase If the unit should malfunction it must be returned to the factory for evaluation Ifthe unit is found to be defective upon examination by J KEM it will be repaired or replaced at no charge Howev
4. The setpoint is changed by holding in the control key and simultaneously pressing the f key to increase or the key to decrease the displayed value Decreases or increases 7 the setpoint pressure when the button is simultaneously held in Regulator s Power Switch Indicates the position of the regulator selection switch 6 Regulator Selection Switch A three position switch that determines the pressure in the attached equipment The different switch positions have the following effects Meter FEvacuates the attached equipment to the setpoint pressure entered in the controller Off Isolates the vacuum pump from the attached equipment and turns the vacuum pump off Full Vacuum Turns on the vacuum pump and evacuates the attached piece of equipment to the limit of the vacuum pump independent of setpoint pressure entered into the meter Optional serial port for remote PC control and data acquisition Power connection for diaphragm vacuum pump Plug the power cord from the vacuum pump into the 240vac outlet Maximum current is 10 amps 240vac Section 3 Operations Guide 3 1 How the Controller Adjusts Pressure For the controller to regulate pressure enter a setpoint into the meter for example 200mmHg and set the regulation selection switch to the Meter position If the setpoint pressure is below the current pressure the controller turns the vacuum pump on and then pauses for a user set period of time to allow the pum
5. Valves open the valve until the equipment is evacuated at a reasonable rate When at the setpoint adjust the valve for stable pressure regulation Leave the needle valve in this position for future use Once the valve is set for a reasonable evacuation rate it doesn t require further adjustment Section 2 Regulator Description The DVR 380 is optimized for use with diaphragm vacuum pumps The lifetime of the diaphragm of a diaphragm pump is significantly reduced when the pump is turned on while the pump is under vacuum To prolong the lifetime of the diaphragm the DVR 380 turns on the pump while it s at atmospheric pressure then once the pump has started it opens a valve connecting the pump to the reaction system When the reaction system is evacuated to the setpoint pressure the controller closes the vacuum valve and then turns off the vacuum pump This sequence of events can continue indefinitely E a v 7 Serial Comm Port on back 4 8 Vacuum Pump Power Outlet on back CS KEM Scientific instruments for sh cence from Soentists Meter Full Vacuum Of Meter Off Full Pressure Display The default display is the pressure inside the attached piece of equipment in units of mm of Hg torr The setpoint pressure can be seen any time by holding in the button Control Key Pressing and holding this button causes the regulator to display the setpoint pressure as a blinking number in the display
6. ct the instrument in which the vacuum is to be regulated 1 e rotary evaporator distillation setup etc to the tube marked Outlet There should be no restrictions 1 e valves stopcocks between the Outlet port and the equipment you re regulating Best results are obtained when large diameter tubing is used to make this connection Set up the Regulator 7 1 Plug the vacuum pump into the J KEM Scientific o 240VAC receptacle on the back of the DVR 380 Turn the power switch to the Fal vacuum pump On v a Vacuum of Pressure torr Meter HT Full 2 Set the regulator selection switch on the BE Farp t0 Setpoin e e front of the DVR 380 to the Off position re en tat Model 200 3 Turn power to the DVR 380 On Regulator Selection Switch Enter the Setpoint Pressure The default display of the meter is the pressure inside the piece of equipment the DVR is attached to The desired pressure or setpoint is entered by holding in the button on the front of the meter and simultaneously pressing either the button to decrease or the 1 button to increase the setpoint The setpoint which appears as a blinking number can be seen at any time by holding in the x button Move the Regulator Selection Switch to the METER Position When set to the Meter position the regulator maintains the attached equipment at the setpoint pressure entered in step 3 For Controllers Equipped with Needle
7. er this WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive vibration corrosive materials or misuse Components which wear or are damaged by misuse are not warranted This includes valves and fuses THERE ARE NO WARRANTIES EXCEPT AS STATED HEREIN THERE ARE NO OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL J KEM SCIENTIFIC INC BE LIABLE FOR CONSEQUENTIAL INCIDENTAL OR SPECIAL DAMAGES THE BUYER S SOLE REMEDY FOR ANY BREACH OF THIS AGREEMENT BY J KEM SCIENTIFIC INC OR ANY BREACH OF ANY WARRANTY BY J KEM SCIENTIFIC INC SHALL NOT EXCEED THE PURCHASE PRICE PAID BY THE PURCHASER TO J KEM SCIENTIFIC INC FOR THE UNIT OR UNITS OF EQUIPMENT DIRECTLY AFFECTED BY SUCH BREACH Returns requests for service and inquires should be directed to J KEM Scientific Inc 6970 Olive Blvd St Louis MO 63130 314 863 5536 Fax 314 863 6070 Internet Catalog http www jkem com E mail jkem911 jkem com Safety Notices Solvents and Vapors J KEM s Model DVR 380 vacuum regulator should not be used in an environment containing flammable organic or gas vapors It is recommended that the DVR 380 be used outside of research hoods away from vapors CAUTION Only qualified personnel knowledgeable in laboratory procedures should use this equipmen
8. hat was entered in Step 2 Press and hold in both the W and AN keys until the system pressure appears in the display then release both keys 3 4 Changing the Display Resolution The procedure below allows you to select the pressure display resolution of your J KEM vacuum controller This procedure allows you to specify 0 1 or 1 torr resolution Press and hold in both the N and AN keys on the front of the digital meter until the word tunE appears in the display then release both keys Press the W key until LEVL appears in the display Next hold in the key then while holding in the key press the AN key until 3 appears in the display Let go of all the keys Press the AN key 11 times until vEr appears in the display Next hold in both the N and keys for about 10 seconds until the display changes what the display changes to can be variable so just hold in the button until vEr goes away Press the AN or W key until LoCk appears in the display While holding in the key press the M or Y key until NonE appears in the display Let go of all the keys the key press the VY key until 2 appears in the display Let so of all the keys Press the AN key 7 times until diSP appears in the display Next hold in the key then while holding in the key press the N or keys until 1 to select 1 torr resolution or 0 1 to select 0 1 torr resolut
9. ion appears in the display Let go of all the keys Press and hold in both the N and AN keys until the temperature appears in the display then release both keys Temperature is now displayed in the selected units Press the N key until LEVL appears in the display Next hold in the key then while holding in 3 5 Correcting Offset in the Displayed Pressure A small amount of error can develop in the displayed pressure 2 torr of the vacuum regulator This is due to the wide pressure range of the transducer used and accuracy better than this is usually not possible For display errors greater than 2mm the controller can be calibrated using the procedure below For users experienced with J KEM s meter do not correct pressure using the ZEro function This introduces an error not a correction Before beginning this procedure you will need to know the correct barometric pressure inside your lab This procedure should only be performed by a qualified electrician 1 Remove the controller s cover 2 Plug the OUTLET port of the regulator and set the regulator selection switch to the FULL VACUUM position Let the controller warm up for 10 minutes 4 Connect a vacuum pump to the INLET port turn it on and let it evacuate the controller to as close to 0 torr as possible Measure the pressure in the system using a manometer The regulator must be evacuated to as close to 0 torr as possible before the adjustment
10. oint is changed to 50mmHg then the upper limit of the pressure band is automatically set to S2mmHg Every time the setpoint is changed the upper limit of the band is automatically set to the pressure which is the amount of hysteresis above the new setpoint 3 2 Adjusting the Vacuum Valve Delay Time The user can set the delay time between when the vacuum pump is turned on and the vacuum valve opens to connect the pump to the vacuum system The delay allows the pump time to evacuate the tubing connecting the pump to the controller before opening the vacuum valve By default the delay time is set to 2 seconds but the time can be adjusted to any value in the range of 0 to 15 seconds To change the delay time 1 Take off the black cover of the DVR 380 from the white base by removing the screws holding the cover to the base 2 Under the digital meter is a circuit board that has 4 in line toggle switches The time specified by the position of these toggle switches as shown in the table below When the meter is pointed to your right switch 1 is on the left and switch 4 is on the right A switch is ON when it s down and OFF when it s up Delay Time 7 Switch 1 Position Switch 2 Position Switch 3 Position Switch 4 Position ON ON ONT ON ON ON ON OR fon JON JON ON OJ OR 0 ON ONT OF OR ON CONT ON JON Op OK TON OFF ON OF 1 ON _ ON OJ OR OF 1 ON __ OF OP OF 1 ON ON ON ONT OF JON ON OF ON _ OR ON OOF
11. p to generate a vacuum After this delay the controller opens a vacuum valve that normally isolates the vacuum pump from the reaction setup The delay time between starting the pump and opening the vacuum valve can be set by the user see below the default value is 2 seconds The system continues to evacuate until the system pressure equals the setpoint pressure At this point the controller closes the vacuum valve isolating the system and turns off the vacuum pump Vacuum pump turns on Vacuum valve opens e Vacuum Profile E gt pea Pressure offset hysteresis _ _202mmHg ea a es Ao ee 200mm Hg ae ae ee Point 1 Setpoint Time _ gt To prolong the life of the pump it s desirable to limit how frequently it s turned on and off to adjust the system pressure This is done by entering an allowable pressure band for the system as opposed to a discrete pressure point The wider the allowable band the less frequently the pump is turned on but in most applications it s desirable to limit the pressure band to a fairly narrow range The pressure band is know as hysteresis and the user can program the amount of hysteresis the controller allows see below By default the DVR 380 is set for 2mmHg of hysteresis Hysteresis always tracks the setpoint For example if hysteresis is set for 2mmHeg then when a setpoint of 200mmHg is set the upper limit of the pressure band is automatically set to 202mmHg If the setp
12. span JO 11
13. t Symbols Power Switch 1 Mains power 220 240vac is ON 0 Mains power 220 240vac is OFF Caution Risk Caution No Protective conductor of electric user serviceable terminal Earth shock parts Ground General Notice WARNING If equipment is not used as specified in this manual the protection provided by this equipment may be impaired Stability The Model 380 is equipped with a side mounting clamp The controller should not be clamped to a free standing ring stand that can tip over The Model 380 should only be clamped to lattice networks securely attached to a bench or laboratory hood Power Voltage 220 240 VAC 50 60Hz Wattage 2400 watts 10 amps Fusing 10 amp fast acting F 240 vac Environmental Indoor use Altitude up to 2000 meters Operating temperatures of 5 C to 40 C Maximum relative humidity of 80 for temperature up to 31 C decreasing linearly to 50 relative humidity at 40 C Installation category II Section 1 Quick Operating Instructions NOTICE When making a connection to the vacuum inlet or outlet fitting on the back of the controller it is critically important that the vacuum tube does not rotate or damage to the controller will result When making a connection use a pair of pliers to prevent the tube from rotating while making any connection to the tubing Connect the Regulator to the Equipment Connect the vacuum pump or the vacuum source to the tube marked Inlet Conne
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