Fieldpiece SDMN6 - Dual Port Manometer and Pressure Switch Tester User Manual

Fieldpiece, Quick start, Description

Quick Start

1. Press

for 1 second to 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.

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Certifications

C-Tick (N22675)

WEEE

RoHS Compliant

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

pressure 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.

Display

Controls

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.)

Fieldpiece

Dual Port

Manometer

and Pressure
Switch Tester

OPERATOR'S

MANUAL

Model

SDMN6

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.

Enter pressure switch TEST mode and start the

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 decrease the induced

vacuum. (Holding decreases faster.)

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.

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.

>> AIRFLOW DIRECTION >>

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.

Gas Pressure

1. See manufacturer's specification for target

inlet and outlet pressures.

2. Shut off main gas supply to furnace.

3. Shut off power to furnace equipment.

4. Zero your SDMN6 while at ambient pressure

with hoses attached.

5. 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.

6. 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.

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.

Adapter

(5/16” to 3/16”)

Adapter Tube

(5/16”)

Outlet Pressure

Tap Screw

Inlet Pressure

Tap Screw

Outlet

Pressure Tap

Inlet Pressure Tap

Specifications

Operating environment: 32°F to 118°F (0°C to 48°C) at <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 (±1.5% FS on 0.07 to ±2.000)

inWC

PUMP

Gas

Manifold

0.05

inWC

Blower

-0.03

inWC

PUMP

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Blinks When

Pump is ON

Leads Detect

Continuity

Auto Power Off

(APO) Enabled

Real Time Pressure

Measurement of P1 or P2

(mbar, inWC,mmWC, or psi)

Solid: Readings Held

Blink: Auto-Capture Mode

Pump Speed Limit Reached

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

Low Battery