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Summary of Contents for Hydro Instruments VM-150
- Page 1 V M - 1 5 0 VA C U U M M O N I T O R I N S T R U C T I O N M A N U A L VM-150 Rev.8/18/2023...
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Page 2: Table Of Contents
SECTION VI: Set Up and Calibration .....................8 A: Alarms ..........................8 B: Analog Output ......................9 C: Maintenance and Calibration ..................9 SECTION VII: Limited Warranty ....................10 FIGURE 1: Installation Wiring Diagram ..................11 FIGURE 2: Enclosure Mounting ....................12 FIGURE 3: Sensor Enclosure Dimensions ..................13 FIGURE 4: VM-150 Dimensions ....................14... -
Page 3: Section I: Introduction
SECTION I: INTRODUCTION The Series VM-150 is a full featured vacuum monitoring system. The system uses the latest in integrated circuit technology, which allows a compact design, accuracy and reliability. The Series VM-150 features both high and low vacuum detection, separate high, low and latch alarm relays, three digit display of vacuum in inches of Hg, LED status indicators and an analog output. -
Page 4: Section Iv: Operation Basics
Enclosure: NEMA 4X rated Vacuum Measurement range: 0 to 30 in. Hg. Low Alarm range: 0 to 15 in. Hg. High Alarm range: 15 to 30 in. Hg. Over Pressure: 85 PSI Delay Timer: 1 to 100 seconds Analog Output Voltage: 0 to 3 VDC Current: 0 to 3 mA DC Reset Switch: IP 65 protection... -
Page 5: B: Led Indicators
NOTE: The High or Low alarm relays do not become active until the latch alarm indicator is POLARITY LED INDICATOR When this LED is on this indicates that the VM-150 is measuring pressure. The digital display shows this pressure in inches of Hg. -
Page 6: Section V: Installation
AC power to the Series VM-150 should be switched on and off with the well pump. This will prevent a low alarm condition when the pump is off. -
Page 7: C: Vacuum Line
Once the unit is securely mounted in an upright position, the cap over the ¼” fitting can be removed. The recommended mounting method for the VM-150 is to use the four (4) mounting holes located where the four (4) plastic screws are that hold down the lid. Use the box as a template for mounting. -
Page 8: Section Vi: Set Up And Calibration
ALARM and LATCH ALARM. Remember the latch alarm will stay active until the reset button is pushed. = Normally open contact = Normally closed contact COM = Common SECTION VI: SET UP AND CALIBRATION The Series VM-150 comes preset at the following default levels. Delay: 50 seconds Low Alarm: 5 inches Hg. High Alarm: 25 inches Hg. -
Page 9: B: Analog Output
NOTE: If you want to disable the high alarm, turn the pot clockwise until it stops. B. ANALOG OUTPUT The VM-150 has an analog output, which will allow the vacuum to be remotely monitored. The connection for this is located in the upper left section of the printed circuit board (See Figure 1). -
Page 10: Section Vii: Limited Warranty
SECTION VII: LIMITED WARRANTY Hydro Instruments warrants this product to be free from defects in material and workmanship for a period of one (1) year from the date of purchase. Except as specified below, this warranty covers all defects in material and/or workmanship in this product. - Page 11 FIGURE 1 Installation Wiring Diagram...
- Page 12 FIGURE 2 Enclosure Mounting...
- Page 13 FIGURE 3 Sensor Enclosure Dimensions...
- Page 14 FIGURE 4 VM-150 Dimensions...
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