SDMN6 - Fieldpiece Instruments
Contents
1. ate after an adjustment Be sure to adjust the pump speed 4 w as needed to maintain the desired induced negative pressure NOTE Dual pressure switches only have one spring and one diaphragm so it s only neces sary to test the negative side For Service In the USA call Fieldpiece Instruments for one price fix all out of warranty service pricing Send check or money order for the amount quoted Send the meter freight prepaid to Fieldpiece Instruments Send proof of date and location of purchase for in warranty service The meter will be repaired or replaced at the option of Fieldpiece and returned via least cost transportation Outside of the USA please visit www fieldpiece com for service contact information For international customers warranty for products purchased outside of the U S should be handled through local distributors Fieldpiece Designed in USA ADE IN TAIWAN www fieldpiece com Fieldpiece Instruments Inc 2014 v142. one it is replacing 9 Fieldpiece is not liable for any damages in juries or loss of life incurred by the misuse of the SDMN6 NOTE Pressure switch ratings are noted by pressure PF This means that the circuit opens when the switch senses its rated Pres sure Fall Example A 0 40 WC PF rated switch should open at a negative 0 40 inches of water column The pressure switch should close and more importantly open within the manufacturer s tolerance rating A WARNINGS A Turn off power to furnace prior to testing to avoid low voltage shorting Checking the Diaphragm If you have difficulty maintaining the correct pressure to open and close the switch the diaphragm could be cracked Checking the Bleed Port Pressure readings are greatly affected when the hose to the pressure switch is pinched If the pressure does not change when you pinch the hose on a pressure switch with a bleed port the bleed port could be blocked Examine the bleed port for signs of corrosion or debris Corrosion is a sign that the switch has been exposed to excessive moisture and diaphragm could be coated with debris Checking the Inducer If the pressure created by the inducer measures more than enough to close the pressure switch but the SDMN6 proves the pressure switch to be good the inducer may not be providing enough airflow to close the switch Limited Warranty This meter is warranted against defects in material or wo
3. turn on your SDMN6 2 If necessary press ZERO for 1 second to set the ambient pressure of P1 and P2 3 P1 will be displayed in inches of water column inWC P1 P2 will be displayed on lower line 4 See sections below for details on testing pres sure switches m Scan for Video Certifications C Tick N22675 N22675 C c z WEEE RoHS Compliant Static Pressure 1 ZERO your SDMN6 while at ambient pressure with any hoses probes attached This will zero both P1 and P2 For measurements less than 2 inWC take reading within 1 minute after zeroing for best accuracy 2 Use one hose P1 or P2 to get the gauge pres sure relative to the ambient or ZERO pressure 3 Connect both hoses if you want to see rela tive pressure P1 P2 This is common when evaluating equipment such as a blower 0 05inwc _ p a Blower BOE 0 03inwc _ p Description Correct pressure switch operation is integral to the safety of a furnace environment The SDMN6 is a dual port manometer that also accurately tests pressure switches by simulating a draft with an internal pump Adjust the pump s speed to create a negative pressure vacuum The red LED indicates when the switch closes View the closing opening pressures directly on the LCD The dual port manometer measures 60 inches of water column high enough for gas pressures Check building pressurization with static pressur
4. Fielapiece Dual Port Manometer and Pressure Switch Tester OPERATOR S MANUAL Model SDMN6 Manometer and Pressure Switch Tester we ie a Specifications Operating environment 32 F to 118 F 0 C to 48 C at lt 80 RH Storage temperature 4 F to 140 F 20 C to 60 C 0 to 80 RH with battery removed Power 9V NEDA 1604A IEC 6LR61 9V alkaline battery Battery life alkaline 200 hours manometer only backlight off 12 hours pressure switch testing 27 pump speed BL off approx 2 5 WC induced pressure w o pump bleed accessory Auto power off APO 15 minutes Low battery indication Units of Measure inWC mmWC mbar psi Resolution 0 01 inWC Overrange OL or OL is displayed Max Pressure 900inWC 17 4psi will damage sensors Compatible media Dry non corrosive gases Pressure ports 2 connectors P1 P2 for flexible tubing 4 5mm to 8mm ID Pump port 1 connector PUMP for 5mm 3 16 inch ID flexible tubing Lead jacks 2 banana plug jacks for testing open close switch status continuity between terminals Accuracy Stated accuracy at 0 to 50 C 32 to122 F 1 5 FS Accuracy and ranges inWC 0 02 on 0 00 to 2 00 1 5 FS on 2 00 to 60 0 mmWC 0 5 on 0 00 to 51 0 1 5 FS on 51 0 to 1500 mbar 0 05 on 0 00 to 5 00 1 5 FS on 5 00 to 150 0 psi 0 001 on 0 000 to 0 07 41 5 FS on 0 07 to 2 000 Quick Start 1 Press X for 1 second to
5. ached Low Battery v Hold for one second to toggle power Press to toggle backlight Hold for one second to zero pressure of P1 and P2 Select P1 or P2 on top display Hold while powering ON to disable Auto off Select mbar inWC mmWC or psi Hold to check battery remaining Gas Pressure Adapter 5 16 to 3 16 Adapter Tube 5 16 Outlet Pressure gt Tap Screw Outlet Pressure Tap H O h gt i N SSN lt m a A U l AS E y siR dy anes LI Smaller end 3 16 of the adapter connects to SDMN6 tubing Remove the installed brass screw fitting from tube so the adapter can be inserted PRAA Inlet Pressure g Tap Screw g Inlet Pressure Tap Real Time Pressure Measurement of P1 or P2 mbar inWGmmWC or psi P1 P2 Mode P1 P2 Test Mode Shows when you are Increasing InC or Decreasing dEC pump speed Indicates Whether P1 or P2 is Shown on Top Display Line HOLD the displayed measurements In TEST mode press to activate auto capture mode The pressure reading will automatically HOLD when the pressure switch closes or opens HOLD Enter pressure switch TEST mode and start the TEST pump allow warm up to finish Press again to stop the pump and return to P1 P2 mode In TEST mode increase pump speed InC to increase the induced vacuum Holding increases faster Decrease pump speed dEC to decreas
6. e resolution of 0 01 WC View P1 P2 in the bottom line of the display for checking pressure differentials Use the static pressure probes to check for a pressure drop accross two points in a duct This is useful for evaluating a blower or finding airflow restrictions in the ductwork NOTE Always use the static pressure probes if checking static pressure of an airflow stream NOTE The red arrows on the probes should point toward the airflow stream gt gt AIRFLOW DIRECTION gt gt C 4 You can press P1 P2 to toggle the top display between P1 and P2 Note P1 P2 is shown in the bottom line of the LCD 5 Press UNITS to select inches of water column inWC millimeters of water column mmWC millibar mBar or pounds per square inch psi 6 Your SDMN6 will turn off automatically after 15 minutes of inactivity if APO is shown To disable auto power off APO hold P1 P2 while turning on your SDMN6 7 If you are in an environment where the tem perature is noticeably changing while you are taking your reading it is advised that you dis connect the meter from the hoses and ZERO it relative to ambient before each reading Display Blinks When pump _ Pump is ON Leads Detect CLOSED Control 1 SECOND PRESS FOR 1 SECOND P1 P2 AUTO OFF UNIT BATTERY CHECK Continuity S g Auto Power Off APO J APO Enabled n N Solid Readings Held Gs Blink Auto Capture Mode Pump Speed Limit Re
7. e the induced vacuum Holding decreases faster See manufacturer s specification for target inlet and outlet pressures Shut off main gas supply to furnace Shut off power to furnace equipment Zero your SDMN6 while at ambient pressure with hoses attached Remove outlet pressure tap screw and insert the brass screw fitting of the P1 hose into the outlet pressure tap of the gas regulator NOTE Some pressure taps have a 5 16 boss instead of an insert screw In this case remove the brass screw fitting from the P1 hose and connect the included 5 16 adapter tube Loosen the tap screw about 1 revolution and slide the tube over the boss see illustration at left Make sure the tube is over the boss enough to prevent leakage Put furnace into operation i e turn on gas and power to the furnace call for heating and have furnace ignite as if running it in normal operation 7 P1 will show the pressure coming out of the regulator 8 If you suspect high or low inlet pressure into the regulator connect P1 to inlet tap and P2 to outlet tap to see the pressure drop across the regulator AUN VI O Pressure Switch Test WARNING Read Pressure Switch Testing Safety Info section below prior to testing 1 Connect leads interchangeable from the SDMN6 to the N O normally open and COM common terminals of the pressure switch 2 Connect the 2 yellow hoses of the Y splitter to the P1 and PUMP p
8. incorrect readings by faulty test equipment or un trained personnel 6 In the interest of safety the SDMN6 should only be used by trained competent profes sionals who understand the hazards and AUTO CAPTURE MODE Press HOLD to automatically HOLD a closing or Opening pressure of a switch as you change the speed of the pump HOLD blinks until a change in continuity is detected Press HOLD again to exit AUTO CAPTURE mode PUMP BLEED ACCESSORY To Yellow Most pressure switches have Pump Hose a bleed port to help regulate the pressure required to close and open the switch Pressure switches rated around 0 10inWC often don t have a bleed port You can insert the Pump Bleed Accessory directly onto the PUMP port to give the pump better control To Pum of these low negative pressures Port Indications a pressure switch is out of calibration has a weak bad diaphragm or a bad micro switch in the pressure switch e Closing opening outside the manufacturer s tolerance rating e CLOSED LED blinks rapidly e Dramatic fluctuations of pressure readings consider the risks of working on and with tools and equipment 7 The pressure rating for the pressure switch is either stamped on the pressure switch or on a sticker attached to the pressure switch Oth erwise contact the vendor or manufacturer of the furnace to get that information 8 An adjustable pressure switch must open at the desired negative pressure to match the
9. ncrease the pump speed and induce a negative pres sure on the switch The CLOSED LED will light when the pressure switch closes Note the closing pressure If the CLOSED LED is ON press y to slow the pump and decrease the negative pressure on the switch The CLOSED LED turns off when the switch opens Note the opening pressure NOTE For higher rated switches you can hold down or w to accelerate decelerate the pump faster Slow your acceleration as you approach the switch s rated pressure NOTE A pressure switch should open and close within the manufacturer s tolerance rating of the switch typically 10 Pressure Switch Testing Safety Info The pressure switch is a safety device that prevents the furnace from running in an unsafe condition An unsafe condition can result in injury loss of property or even loss of life 1 Before every use check the SDMN6 and the tubing for breaks or blockage Check the tub ing for any moisture as well 2 It is critical that the hoses going to P1 and the switch are the same length 3 Check for the presence of moisture in the pressure switch before using the SDMN6 Do not use the SDMN6 on a pressure switch that has moisture in it Moisture can damage the SDMN6 and VOID the warranty Check the tubing for moisture build up as well 4 The SDMN6 is designed to produce a precise amount of negative pressure Always zero the SDMN6 before testing a switch 5 Fieldpiece is not responsible for
10. orts of your SDMN6 Transducer Test 1 Connect the 2 yellow hoses of the Y splitter to the P1 and PUMP ports of your SDMN6 2 Connect a volt meter to the transducer s terminals ZERO your SDMN6 while at ambient pressure with yellow hoses attached For measure ments less than 2 inWC take reading within 1 minute after zeroing for best accuracy 4 Press TEST to start the pump A brief warm up period ensues Now connect the white hose to the low side of the transducer Incorrect setup will cause incorrect pressure measurements 6 Press w to increase decrease the pump speed and resulting negative pressure For higher rated transducers you can hold down the button to get the pump up to speed faster 7 AS you increase the negative pressure the voltage across the terminals will change based on the transducer s rating Compare observed voltage to rated voltage to deter mine the health of the transducer WW VI 3 ZERO your SDMN6 while at ambient pressure with yellow hoses attached For measure ments less than 2 inWC take reading within 1 minute after zeroing for best accuracy 4 Press TEST to start the pump A brief warm up period ensues 5 Now connect the white hose to the negative side of the pressure switch Incorrect setup will cause incorrect pressure measurements 6 Make sure the pressure switch is vertically oriented the same as it is on the equipment 7 If the CLOSED LED is OFF press to i
11. rkmanship for one year from date of purchase Fieldpiece will replace or repair the defective unit at its option subject to verification of the defect This warranty does not apply to defects resulting from abuse neglect accident unauthorized repair alteration or unreasonable use of the instrument Any implied warranties arising from the sale of a Fieldpiece product including but not limited to implied warranties of merchantability and fitness for a particular purpose are limited to the above Fieldpiece shall not be liable for loss of use of the instrument or other incidental or consequential damages expenses or economic loss or for any claim of such damage expenses or economic loss State laws vary The above limitations or exclusions may not apply to you Adjustable Pressure Switch Calibration WARNING Read Pressure Switch Testing Safety Info section below prior to testing 1 Follow steps 1 6 of Pressure Switch Test 7 Press amp w to adjust the pump speed until displayed negative pressure is stable within 0 02 inWC of your target pressure 8 Start with the switch closed If the switch is open slowly loosen the adjustment screw until the CLOSED LED turns on 9 Open the switch by slowly tightening the adjustment screw on the adjustable pressure switch until the CLOSED LED turns off The adjustable pressure switch is now calibrated to your target pressure NOTE Stabilized pressures may slightly fluctu
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