User's Guide

Table Of Contents

EVR-VPXDOC-0036 VP Series 2000 User Guide

DIVIGRAPH

Rev 2.4.1

September 2021

About Using Adhesives

To prevent devices separating from the machinery they monitor and to obtain accurate high

frequency response, it is important to choose an adhesive that provides excellent adhesion,

temperature rating, gap filling properties, and rigidity. Many two-part epoxies and acrylic adhesives

are suitable. Two examples are Loctite AA330 or ClickBond CB200.

If you are mounting a tri-axial sensor, it can be difficult to align the device to the axis of the machine

being monitored. We recommend you first screw the pad onto the actual sensor. Then mark the

sensor’s X-direction on the pad. Remove the pad from the sensor before applying adhesive.

Apply 0.5g to 1g of adhesive to the center of the mounting pad, then position the pad on the

mounting surface. Align the pad to sensor's X direction if required. Rotate it back and forth until you

feel slight metal-to-metal contact. Your goal is to force most of the adhesive out the sides to eliminate

voids and form a slight band around the pad.

Attach the Device

Attach VP Series 2000 devices as follows:

1. Apply a suitable (medium strength) thread locking compound to the mounting stud. This is

necessary due to vibration.

2. Apply a lower-strength thread locking compound to secure the VP Series 2000 device to the

mounting stud or pad.

3. Attach and tighten the device to the mounting point.

a. If using the M6x1 to M8x1.25 tri-axial alignment stud, tighten the device using a torque wrench

to 6 Nm (53 in lb) maximum.

b. For all other mounts, tighten the device to 6-7 Nm (53 to 62 in lb).

4. (Optional) Secure the device by passing a 1mm (.04 inch) lanyard (not provided by Divigraph)

through the fall protection hole in the base. Secure the lanyard to a suitable retaining point.

Sensor alignment considerations:

• Align the axis of sensors as needed to the axis of the acceleration being monitored.

• The Z-axis of a VP Series 2000 sensor is the preferred measurement axis. It has the highest

frequency response and capable of PeakDemod measurements.

• Where possible, mount sensors in the axial or radial direction of machines.

To improve vibration coupling and high frequency response, apply a very light amount of silicone grease

to the base of sensors before attaching them to a mounting point.