SECURITY GUIDE
Surveillance Cameras
Surveillance Cameras
Security surveillance cameras can help deter crime when a perpetrator fears being identified. The recorded images can also help provide information for investigations of crime, vendor shortages, as well as general liability slip, trip, and fall incidents or other accidents in view of the camera.
Some city ordinances have requirements for businesses to install and maintain a surveillance camera system to help apprehend suspected criminals. You should work with a qualified attorney to ensure your system is in full compliance with the law. Check with your city or state for any recommended or required specifications for surveillance cameras in your type of business.
Camera Systems
The performance and quality of recorded images with different camera systems can vary from a trip-switched 35mm still camera system or high definition digital video over the internet. A single-camera system activated by an alarm or event can take one or more snapshots of suspected criminal activity. A multi-camera system with fixed continuous recording can help capture details for a wide variety of instances.
A camera interfaced to a robbery or burglar alarm system can provide real-time monitoring with audio and video. This gives the ability to confirm the activity and help avoid false alarms. The number of cameras along with image storage and method of transmission need to be considered. Your vendor and information technology professionals should be involved to determine which system is right for you.
Consider upgrading if you still use VHS. If you have not upgraded, then set the highest resolution possible for VHS or S-VHS analog systems. The ability to transfer and save VHS recordings to other media can have uncertain outcomes. Tapes wear out and are cumbersome to use. One should have enough storage capacity to record 24/7 for a month while rotating to another videotape each day.
For digital systems, use at least 640 × 480 resolution. Hard-disk storage capacity is a needed consideration for digital systems. The software used can result in a loss of image quality if the compression rate is too high; however, a low compression rate can result in higher image quality with a larger file size on the hard drive.
Systems that change a recorded frame rate and quality after detecting motion can save on storage space for both analog and digital systems. However, with a low frame rate, an incident could appear blurred or have missing details for the first second of the triggering event. Having a higher continuous frame rate (such as 15 to 30 frames per second) helps to ensure captured images are more useful.
Camera Location
The camera’s physical placement can be an important consideration for any adjustments or maintenance needs in the future. Wireless cameras can be mounted where cabled surveillance camera systems are not practical. Cameras installed outdoors should handle weather extremes, as well as changing light levels from darkness to full sunlight. Also, consider how the type of camera, direction of view, and placement of lighting can affect picture quality.
Property is under camera surveillance.
Several states have laws that prohibit hidden video cameras. Do not place cameras in areas where there is a reasonable expectation of privacy, like bathrooms or changing rooms. Use signs notifying of the use of video surveillance. Position a camera to record a person at the entrance door. Cameras suspended in protective domes help stop perpetrators from covering the camera, and control damage from vandals. Make sure nothing obstructs the camera view for what might occur on the other side of windows and glass doors.
To order, use form number F70-729.1.
A display monitor provided where people can see what the camera observes can help heighten a perception of security. Adjust the camera so a person is at least 25 percent of the image, with a facial image about one-fifth the total screen height. Aside from the front entry, other areas of concern can be:
■ Cash counting and ATMs
■ Sales counters and checkout aisles
■ Health and beauty products, and pharmacy
■ Restricted areas with high values
Camera Operation
■ Have your camera turned on and know how to operate it.
■ Be able to retrieve recorded images quickly to help apprehend criminal suspects.
■ Have the date and time stamp recorded on the images.
■ Protect the confidentiality, integrity, and availability of recorded images.
■ Retain the original recordings for 60 days or more.
References:
Minneapolis Code of Ordinances Section 259.230
NFPA 731 Standard for the Installation of Electronic Premises Security Systems
■ Back door and loading docks
■ Common walking areas
■ Parking lot and loading area
■ Filling station dispensers
■ Keep a separate log for identifying any recordings of concern.
■ Arrange backup power for the camera and storage system.
■ Consult with the manufacturer or owner’s manual for proper system maintenance and other hardware recommendations.
■ Keep the associated software up-to-date.
■ Periodically verify the quality of recorded images.
This publication is for general information and risk prevention only and should not be considered legal or other expert advice. The recommendations herein may help reduce, but are not guaranteed to eliminate any or all risk of loss. The information herein may be subject to and is not a substitute for any applicable laws or regulations. Qualified counsel should be sought with questions specific to your circumstances.