Love LDPM-01 Installation And Operating Instructions Manual

Model LDPM Digital Differential Pressure Manometer

2.178

Specications - Installation and Operating Instructions

Bulletin TE-LDPM

The MODEL LDPM Digital Differential Pressure Manometer is a versatile, handheld, battery operated manometer that can measure up to 55.4 in w.c. (140.6 cm w.c.). It is able to measure either positive, negative, or differential pressure with a ±3% FS accuracy. Users are able to select from 11 common English and metric pressure units.

[55.32]

.780

[19.81]

[151.26]

SPECIFICATIONS

Service: Air and non-combustible, noncorrosive gases only.

Wetted Materials: Consult factory. Accuracy: ±3% FS. Repeatability: ±0.2% FS. Pressure Hysteresis: ±0.29% FS.

Pressure Limits: 10 psi. Response Time: 0.5 s (typ). Temperature Limits: Operating: 32 to

122°F (0 to 50°C); Storage: 14 to 140°F (-1 to 60°C).

1.320

[33.53]

6.344

[161.14]

5.955

Display: Dual-line backlit LCD.

Resolution: See chart. Power Requirements: 9 V alkaline

battery, included, user replaceable.

Weight: 5.82 oz (165 g). Process Connections: Two barbed

connections for use with 1/8˝ (3.18 mm) or 3/16˝ (4.76 mm) ID tubing.

Agency Approvals: CE.

RANGE

Model in w.c. ft w.c. in Hg psi oz/in

LDPM-01 ±55.40 ±4.612 ±0.407 ±2.00 ±32.00 ±140.6 ±103.4 ±0.137 ±137.8 ±13.79 ±0.140

PRODUCT OVERVIEW

C D

A. Low Pressure Port Switch B . High Pressure Port Switch C. Units Button D. Hold Button

LOVE CONTROLS

cm w.c. mm Hg bar mbar kPa kg/cm

E. Differential Button F. Power Button G. Backlight Button H. Record Button

A DIVISION OF DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

1. Hold Function

2. Differential Mode

3. Primary Data Screen

4. Record Mode

5 6

Phone: 219/879-8000

Fax: 219/872-9057

5. MAX/MIN/AVG Function

6. Low Battery Indicator

7. Pressure Unit Indicator

8. Relative Time Clock

lovecontrols.com

e-mail: love@love-controls.com

OPERATION Battery Installation

The unit is shipped with a 9 V alkaline battery which must be installed before operation. When battery replacement becomes necessary, use only a 9 V alkaline type. To install the batteries:

1. Remove the screw holding the back cap in place.

2. Connect the battery to the enclosed battery clip observing correct polarity. Be

careful not to trap wires between the battery or case. This could make it difcult to

install the battery or remove it later for replacement.

3. Replace the back cap and screw into place.

Pressure Connectors

The LDPM has two barbed connector ports for use with 1/8˝ (3.18 mm) or 3/16˝ (4.76

mm) ID tubing.

• For a single positive pressure, connect the tubing to the high pressure port and vent the opposite to atmosphere.

• For a single negative pressure (vacuum), connect the tubing to the low pressure port and vent the opposite port to atmosphere.

• To measure differential pressure, connect the higher pressure to the high pressure port and the lower pressure to the low pressure port. The manometer will indicate the difference between the two ports. (Note: If pressures are reversed, LCD will display differential pressure as negative.

Statistics

The MAX/MIN mode allows the user to view only the highest (MAX), lowest (MIN), or average (AVG) readings with a relative time stamp of the recorded values.

1. Press the REC button once and REC appears on the display. (All other functions are locked except for Power and Backlight.) The relative clock also appears in the secondary display and starts counting.

2. Press the REC button again and MAX appears on the display. The display is now showing the maximum pressure and relative time it was recorded.

3. Press the REC button to display the minimum value MIN reading with the relative time.

4. Press the REC button to display the average value AVG reading with the relative time.

5. Press the REC button again to continue recording MIN/MAX/AVG measurements.

6. To exit the MIN/MAX/AVG mode, press the REC button for 3 seconds to return to normal operation.

Auto Power Off

The manometer will automatically shut off after 20 minutes to conserve battery life. To disable the Auto Power Off function, while the unit is off, hold down the HOLD button and turn on the manometer. An “n” will appear on the display indicating that Auto Power Off mode is disabled. The manometer will return to normal operation when it is turned off.

On/Off Power

Press the ON/OFF button to turn the unit on or off. Upon startup, the manometer defaults to the setting last used.

Zeroing Readings

Before use and without ttings attached to the meter, press the HOLD button for more than 2 seconds to zero the meter. The meter will reset and display 000 from right to left. 0.000 will be displayed.

Offsetting the Display Value

To offset the meter and display, press the DIF button while taking a measurement. The subsequent reading will be the difference between the current measurement and the measurement that was on the display when the button was pressed. Press the DIF *DIF button photo* button again to turn off this setting.

Display Backlight

Press the BACKLIGHT button to turn on the backlight. It will remain on for 40 seconds or until the BACKLIGHT button is pressed again.

Display Hold

To hold or freeze a value, press the HOLD button momentarily and the HOLD icon will appear in the upper left side of the display. When the Hold function is enabled, the pressure reading will not change and the unit of measure and HOLD icon will also be displayed. Press the HOLD button again to return to normal operation.

Unit Measurement Mode

The manometer features a variety of engineering units to read pressure. Press the UNITS button momentarily and the manometer will cycle through the 11 available units of measure as indicated by the cursor on the bottom of the display.

Error Codes

An error message will appear on the display if the manometer fails an internal diagnostic test.

ERROR CODE REASON

Err. 1 Pressure value is over the positive pressure limit Err. 2 Pressure value is below the negative pressure limit Err. 3 Differential pressure is over the positive pressure limit Err. 4 Differential pressure is below the negative pressure limit

Battery Monitor

The LDPM monitors its battery voltage whenever it’s powered on. When the battery power becomes low, BAT will appear on the LCD. A weak battery can cause inaccurate measurements. It is recommended to replace the battery as soon as possible to ensure top functionality. Do not leave an exhausted battery in the unit due to potential leakage.

MAINTENANCE/REPAIR

Upon nal installation of the Model LDPM Digital Differential Pressure Manometer, no routine maintenance is required. The Model LDPM is not eld serviceable and is not

possible to repair the unit. Field repair should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact customer service to receive a Return Goods Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes.