Potter EVD-1 User Manual

Page 11

EVD-1 • 5401043 • REV M • 9/07

Sensitivity Adjustments

Adjust the EVD-1’s internal pickup sensitivity control, RV1, to 1/2 scale (12 o’clock position). Refer to Figure 1 for location of RV1.

Adjust accumulator rotary switch, S1, to desired setting. A setting of zero disables the accumulator function. Refer to Figure 1 for location of S1.

Perform simulated attack tests on all accessible surfaces that are protected by EVD-1. Strike the protected surfaces using a plastic mallet
or the plastic handle of a large screwdriver. An alarm condition (as indicated by the status LED turning RED) must occur. Lightly scrape
the blade of a screwdriver next to the EVD-1. After 15 seconds of continuous scraping, an alarm condition (as indicated by the status LED
turning RED) must occur. Be sure the scraping generates a test point voltage greater than the minimum constant noise level shown
in Table 2. Adjust sensitivity settings to the minimum needed to achieve desired level of response.

Note: Extreme care should be exercised so that the protected surfaces are not marred or damaged while performing simulated attack tests.

A voltmeter can be connected to the analog test point and pin 2 of the fi eld wiring terminal block to aid the installer in adjusting the
sensitivity controls. Refer to Figure 1 for analog test point location.

Table 2. Analog Test Point Levels

With the system operating in a non-alarm state, verify the operation of all tampers. A tamper condition is indicated by the status LED
turning AMBER. If the system is in alarm when a tamper condition occurs, the status LED will remain RED, identifying the alarm
condition. The tamper alarm remote annunciator and the tamper alarm contact always identify a tamper condition.

Testing

Applying a magnet to the side of the EVD-1 controller, (see Figure 1), actuates a magnetic switch and generates a test signal. The EVD-1
activates the alarm contacts, activates the alarm remote annunciator, and illuminates the status LED in RED.

Note: Most ordinary door contact magnets will activate the test feature on the EVD-1.

System operation can also be verifi ed from a remote location by use of an optional RTA and/or a UL listed central station test unit. Operating a
normally open test switch generates a test signal which causes the EVD-1 to signal an alarm condition.

Note: Always test unit prior to placing unit into service. Unit must be tested at least once a year.

Signal Description

Analog Test Point Level

Maximum ambient noise level

0.20 VDC

Minimum constant noise for alarm
(except drilling)
(min. 15 sec. duration)

0.25 VDC

Minimum single noise for alarm
(accumulator on)

0.70 VDC

Minimum single noise for alarm
(accumulator off)

1.25 VDC

Safe Construction Requirements
Table 3. Maximum Linear Distances From Detector To Any Point On The Protected Surface

Safe Construction

Maximum Linear
Distance from Detector
to Any Point

Local Pickup Minimum
Sensitivity Setting, RV1

Steel Safes
Body: minimum 1/4"
Door: minimum 1/2"

96 inches

Fully counterclockwise

Composite safes
Body: minimum 16 gauge steel over 3"
Composite material
Door: minimum 1/4" steel over 3"
composite material

110 inches

Fully counterclockwise