CohuHD Costar 3930 Series User manual

July 15, 2014
Technical Manual 6x-1037C www.CohuHD.com
[email protected]
.
Figure 1. Model 3930 Camera
INSTALLATION AND OPERATION MANAUL
CohuHDTM Products
3930 Series
Fixed Barrel Camera System

2
This equipment has been
tested and found to comply
with limits for class A digi-
tal devices, pursuant to part
15 of the FCC rules.
LIST
OF
SECTIONS
LIST OF
TABLES
LIST OF
FIGURES
SECTION TITLE PAGE
1.0 GENERAL DESCRIPTION 3
1.1 Electrical Characteristics 3
1.2 Meachanical Characteristics 3
2.0 INSTALLATION 3
2.1 Unpacking and Receiving Inspection 3
2.2 Static Discharge Protection 6
2.3 Installation Overview 8
2.4 Equipment Supplied 9
2.5 Equipment Required but Not Supplied 9
2.6 Power Requirements 9
2.7 Cabling Requirements 10
2.8 Installation 12
2.9 GUI Serial Interface 14
3.0 OPERATION 19
TABLE TITLE PAGE
1 Specifications 4
2 Rear Panel Connector Pin Functions (115 V ac) 11
3 Rear Panel Connector Pin Functions (24 V ac) 11
4 Required Cable Characteristics (Camera to Junction Box) 12
5 Communications Settings 16
FIGURE TITLE PAGE
1 Model 3930 Camera 1
2 Model Number Interpretation 4
3 Dimensions, Camera Sunshield 5
4 Dimensions (Less Sunshield) 5
5 Camera Side View 6
6 Camera Rear View 6
7 Camera Front View 6
8 Typical Installation 7
9 232/422 Converter 8
10 Typical Rear Panel Mating Connector and Backshells 9
11 Camera Bottom View 10
12 Rear Panel Connector Pinout 11
13 Type CA-298A Cable Assembly, 115 V ac Input Power 12
14 Type CA-299A Cable Assembly, 24 V ac Input Power 13
15 Typical Win MPC Application 14
16 Typical Win MPC "Home" Screen 15
17 Typical Win MPC Communications Functions Screen 16
18 Find ID Screen 17
19 Day/Night DSP Camera Functions Screen 17
20 Message Programming Screen 18
21 Tours and Sectors Setup (Not Used) 18

3
1.0 GENERAL DESCRIPTION
The 3930 Camera (figure 1) integrates a high
performance digital signal processing Camera and
control receiver into one package.
Specifications are contained in table 1. A model
number interpretation is provided in figure 2. This
can be used to interpret an existing model number .
WARNING
This Camera can be oper ated from 115 V ac.
Use all a ppropriate care when installing and
maintaining this Camera or any equipment op-
erating from 115 V ac.
1.1 ELECTRICAL CHARACTERISTICS
The Camera uses digital signal processing (DSP).
It has an internal source ID generator . Integration
control, plus a built-in video storage card provides
full color continuous video even at very low light
levels.
An automatic circuit places the Camera in mono-
chrome mode at low light levels. This feature can
be turned off if desired.
This Camera will operate in temperature ranges
from -40° to +60° C. The sealed and pressurized
enclosure protects against environmental hazards
such as salt, road grime, dirt, moisture and other
undesired contaminants in the atmosphere.
Most Camera functions are operable via RS-422
serial communications. This is typically required
only during setup and adjustments, but the camera
could also be controlled during normal operations
from a distant location using RS-422. The inte-
grated receiver/driver, contained within the Cam-
era, communicates using Cohu protocol messages.
Win MPC Graphical User Interface (GUI) software
is available for setting the address and performing
field tests for each Camera. This can be obtained
at no cost from either the cohu-cameras.com web
site or by mail on either a floppy disk or CD Rom.
Installation and setup adjustments are typically
performed on-site using a laptop computer running
some form of the Windows operating system. The
typical computer has an RS-232 serial output. This
must be converted to RS-422 for connecting to the
Camera. A small inexpensive 232-422 converter is
available to do this.
1.2 MECHANICAL CHARACTERISTICS
The Camera can be considered as a single me-
chanical assembly for installation purposes, but it
actually consists of two subassemblies: (1) the
Camera environmental housing (figure 3) and (2)
the sunshield (figure 4). Side, front, and rear views
are shown in figures 5 through 7. Figure 1 1 is a
bottom view.
All Camera circuits are contained within the sealed
and pressurized environmental housing. It has a
clear window at one end through which the Camera
lens views the scenes of interest. This barrel is fully
covered by the sun shield. It is spaced slightly away
from the housing itself. This minimizes heat buildup
due to sunlight and also serves to minimize sun flair
by shading the lens at some Camera angles.
A single rear panel 18-pin cable connector provide
for all signal and operating power connections for
the Camera.
2.0 INSTALLATION
This section describes the installation of a Camera
in a typical situation. Basically, it consists of bolting
the Camera to a support, connecting it to a cable
that runs to a nearby junction box, setting the field
of view using a local on-site laptop computer , and
then connecting the video to the system for viewing
at the operator’s control console. Details about
these steps and supporting information are in-
cluded in this section. Each Camera must be
programmed with the altitude above sea level for
the location where it will be mounted. This cali-
brates a low pressure circuit in the Camera.
2.1 UNPACKING AND RECEIVING
INSPECTION
This item was thoroughly tested and carefully
packed in the factory. Upon acceptance by the
carrier, they assume responsibility for it s safe
arrival.

NOTE 1: Table 1, Specications was removed. Please refer to the CohuHD website for product specication:
http://www.CohuHD.com
NOTE 2: Figure 2. Model Number Interpretation was removed Please refer to the CohuHD website for model number
interpretation: http://www.CohuHD.com.

2.00 (50.8)
.625 (15.9)
1/4-20 Thread
(Swage nut, 5 places)
2.75 (69.85)
2.00 (50.8)
.625 (15.9)
Figure 4a. Mounting Holes Positioning. Dimensions in inches (mm)
Figure 3. Camera with sunshield. Dimensions in inches (mm)
Figure 4. Camera without sunshield. Dimensions in inches (mm)

6
Figure 5. Camera
Side View
Figure 6. Camera Rear View Figure 7. Camera Front View
Should you receive this item in a damaged condi-
tion, apparent or concealed, a claim for damage
must be made to the carrier.
To return the product to the factory for service,
please contact the Customer Service Department
for a Return Authorization (RA) Number.
If a visual inspection shows any damage upon
receipt of this shipment, it must be noted on the
freight bill or express receipt and the notation
signed by the carrier's agent. Failure to do this can
result in the carrier refusing to honor the claim.“
When the damage is not apparent until the unit is
unpacked, a claim for concealed damage must be
made. Make a mail or phone request to the carrier
for inspection immediately upon discovery of the
concealed damage. Keep all cartons and packing
materials. Since shipping damage is the carrier's
responsibility, the carrier will furnish you with an
inspection report and the necessary forms for filing
the concealed-damage claim
2.2 STATIC DISCHARGE PROTECTION
Procedures in this manual do not require entry into
the housing of the Camera. However in the event
that an open unit were available, the following
precautions should be followed:

7
FO CABLE
POWER CORD WIRING
24 VAC WIRING
75 OHM
SERIAL
DATA
(RS422)
NOTE:THE VIDEO LINE
MUST BE TERMINATED
WITH 75 OHMS FOR
PROPER OPERATION
COAX
115
VAC
24
VAC
CABLE CA298A (115 VAC)
CABLE CA299A (24 VAC)
115 VAC AND 24 VAC
CONDUIT
CONDUIT
75 OHM
VIDEO IN
FIBER OPTIC
TRANSCEIVER
JUNCTION BOX
3930
HI
LO
GND
OR
OR
(CA299A)
(CA298A)
D9P D9P
FO
CONVERTER
232
422
TO
LAPTOP COMPUTER
RS-232 SERIAL PORT
When installing or servicing a Camera, connect
the RS-232 serial output of laptop computer
through a Converter to the RS-422 Serial cable.
Connect the 75 ohm video cable
to a local tv monitor for viewing
scenes from the camera.
Figure 8. Typical Installation
CAUTION
This Camera contains sensitiv e devices that
can be dama ged by sta tic discharge. Use a p-
propriate static control methods w hen work-
ing inside the Camera.
Components used in modern electronic equipment,
especially solid state devices, are susceptible to
damage from static discharge. The relative suscep-
tibility to damage for semiconductors varies from
low with TTL to high with CMOS. Most other semi-
conductors fall between TTL and CMOS in suscep-
tibility to static discharge. As a minimum, therefore,
observe the following practices when working
inside this or any other electronic equipment:
1. Use conductive sheet stock on the work bench
surface.
2. Connect the sheet stock to ground through an 1
megohm or greater value resistor.
3. Use a wrist strap connected to ground through
an 1 megohm or greater value resistor when work-
ing at the bench.
4. Maintain relative humidity of the room above 30
percent. This may require a room humidifier .
Working on circuits with relative humidity below
30 percent requires extraordinary procedures not
listed here.
5. Use antistatic bags to store and transport an
exposes chassis, circuit boards, and components.
Use new antistatic bags. Old, used bags loose
their static protection properties.
This list serves as a reminder of the minimum
acceptable practices. Be sure that all static dis-
charge devices at the work bench are properly
installed and maintained. Standard grounding
mats and wrist straps purchased for use at work
benches are supplied with leads having current
limiting resistors for safety. Never substitute with a
grounding lead not having the resistor .

8
2.3 INSTALLATION OVERVIEW
This section is an overview of installing the Camera
at the location where it is mounted to a wall, a pole,
or in some other manner.
This section further assumes that the Camera has
previously had various internal functions set for the
desired operating conditions. This typically is done
at a maintenance service facility, though they could
be performed after the Camera is mounted on-site.
One such setting is the pressurization altitude
compensation. Each camera must have pro-
grammed into it the altitude above sea level at its
operating location. This calibrates the Low Pres-
sure alert circuit. See section 2.9 for instructions
regarding communicating with the Camera and
setting the various operating conditions.
This summary procedure assumes that the Cam-
era multiconductor cable will be routed from the
Camera mounting location to a nearby junction box
or control panel located where it is accessible by
installation and service personnel. See figure 8. A
typical on-site installation consists of the following
basic steps:
Figure 9. 232/422 Converter
1. Route the multiconductor cable from the Cam-
era location to the nearby junction box. This will
likely require pulling cable through conduit, ped-
estals, or walls, so preplan carefully for this step.
2. Mount the Camera at the intended viewing site
pointing in the direction of interest. (The Camera
may have to be repositioned, so do not snug down
the fasteners too tight at this step.) Connect the
cable to the rear p anel connector.
3. Make the following connections at the junction
box where the multiconductor cable from the Cam-
era is to interconnect with system cables and
power:
a. Connect the RS-232 serial output of a laptop
computer to the RS-422 cable (using a 232
to 422 converter). The laptop must have Win
MPC software installed.
b. Connect a viewing monitor to the 75 ohm co-
axial cable.
c. Connect the proper operating power for the
Camera (24 V ac or 115 V ac). Each requires
a different cable.

9
4. Initiate operation of the Win MPC software on
the laptop.
5. Obtain a picture from the camera
6. Observe the scene from the Camera and reposi-
tion as necessary to obtain the field of view de-
sired at that location. This is done by mechanically
repositioning the Camera body while also setting
the lens to the required field of view (zoom in-out)
using the Cohu Win MPC software running on the
laptop computer.
7. Secure the Camera in place once the desired field
of view is obtained.
8. Verify or change as desired any of the various
Camera functions that can be controlled by the
Win MPC software.
9. Turn off power to the Camera, turn off the laptop,
and turn off the viewing monitor.
10. Disconnect the laptop and monitor.
11. Connect the 75-ohm cable to the system inter-
face cable.
12. Apply power to the Camera and verify that it is
operational in the system.
The previous 12 steps summarize a typical installa-
tion. Additional information can be found in the
remainder of this manual.
2.4 EQUIPMENT SUPPLIED
The basic Camera model number supplies the
following item:
1. Camera module in pressurized environmental
housing with integral attached mounting base and
sun shield.
2.5 EQUIPMENT REQUIRED BUT NOT
SUPPLIED
The following items are required to install a Cam-
era and unless ordered with the Camera are not
supplied:
1. Cable, multiconductor, Camera to junction box
(CA-298A for 115 V ac or CA-299A for 24 V ac)
2. Mounting pedestal, arm, pole, or other device -
including attachment hardware
3. Installation setup equipment, including:
a. Win MPC test and setup GUI (available for
no cost as either a download or on disk)
b. Laptop computer running Windows
c. RS-232 / RS-422 Converter (figure 9)
d. Tv monitor for viewing Camera scenes
2.6 POWER REQUIREMENTS
The Camera operates from either 24 V ac 60 Hz or
115 V ac 60 Hz power. Two cables are available.
One is wired to use the 24 V ac input (CA-299A),
the other is wired to use the 115 V ac input (CA-
298A).
Figure 10. Typical Rear Panel Mating
Connector and Backshells
This 90° bac kshell
is installed on the
connector in place
of the str aight
backshell shown
above
Note: 90° backshell
cables are special
order

10
Power consumption is 11 watts — increasing to 17
watts when the internal heaters cycle on and of f
during cold conditions.
All electrical connections to and from the Camera
are made through a single 18-pin connector located
on the rear panel. This connector provides operat-
ing voltage (115 or 24 V ac), RS-422 dat a, and 75
ohm video.
2.7 CABLING REQUIREMENTS
Always pre-plan all system cabling before starting
an installation. Before a Camera is bolted in place,
the Camera cable should be available to attach to
the rear of the Camera.
Table 2 is the rear p anel connector pin function list
for a Camera being operated from 1 15 V ac, 60 Hz
power. Table 3 lists pin functions when the Camera
is to be operated from 24 V ac, 60 Hz power . These
pin functions are determined by the system cable
attached to the connector. The camera itself oper-
ates from either 115 or 24 V ac.
Most installations will require a nearby junction box
where the camera cable will transition to the system
cabling. Maximum cable length to this junction box
for 115 V ac is 250 feet. The 24 V ac cable length
is limited to 50 feet.
Table 4 lists some basic characteristics required for
a typical cable between the Camera and nearby
junction box.
Figure 10 shows the 18-pin mating connector with
different versions of backshell. The CA-298A (115
V ac) and CA-299A (24 V ac) cables are as-
sembled using the straight backshell; however ,
cables can be also constructed with a 90 degree
backshell.
Figure 12 shows the rear panel connector on the
Camera. This is a view looking at the rear panel
from outside the Camera. The mating connector
on the multiconductor Camera cable attaches here.
This diagram can also be used as the pinout view
for the wiring side of the mating connector .
Figure 13 is the wiring diagram for the 1 15 V ac
cable (CA-298A). The maximum length for this
cable is 250 feet. At the junction box end it has a
BNC connector for the video, 115 V ac plug to
supply power, and a D9P (pins) connector for the
RS-422 data communications.
Figure 14 is the wiring diagram for the 24 V ac
cable (CA-299A). The maximum length for this
cable is 50 feet. At the junction box end this cable
had a BNC connector, three stripped leads for
connecting to the 24 V ac power source, and a D9P
(pins) connector.
Both these cables use the straight backshell at the
Camera end. Cables with the 90 degree backshell
would be special order and have dif ferent cable
type number designators.
Figure 11 was removed

11
Table 2. Rear Panel Connector
Pin Functions (115 V ac use)
PIN FUNCTION
S video signal (75 ohm)
H video shield
G data ground
FTx-
(RS-422)
ETx+ (RS-422)
MRx+ (RS-422)
NRx- (RS-422)
A no connection
B no connection
J no connection
K no connection
R no connection
T no connection
L no connection
D 115 V ac line (hot/high)
C 115 V ac neutral (low)
P 115 V ac ground
T no connection
R no connection
U overall shield
Table 3. Rear Panel Connector
Pin Functions (24 V ac use)
PIN FUNCTION
S video signal (75 ohm)
H video shield
G data ground
FTx-
(RS-422)
ETx+ (RS-422)
MRx+ (RS-422)
NRx- (RS-422)
A no connection
B no connection
J no connection
K 24 V ac high
L24 V ac low
R no connection
T no connection
D no connection
C no connection
P 24 V ac ground
T no connection
R no connection
U overall shield
Note: A Camera can be oper ated
from either 115 V ac or 24 V ac.
Cable wiring deter mines how the
Camera is powered.
Figure 12. Rear Panel Connector Pinout
MATINGVIEW OF REAR PANEL CONNECTOR
(PIN LAYOUT SAME AS WIRINGVIEW OF RELATED CABLE CONNECTOR)
Cohu part no. 1310225-011
Amphenol/Bendix part no. PT07C-14-18P
This Connector Has Pins
The Mating Cable Connector Requires Sockets
G
H
J
T
U
S
R
D
F
P
C
E
AL
K
MN
B
Warning: Applying 24 V ac
to pins K and L cause 115 V
ac to be back fed out of pins
D and C.

12
Table 4. Required Cable Characteristics
(Camera to Junction Box)
CONDUCTOR
FUNCTION CHARACTERISTICS
VIDEO RG-174/U (75 ohm), 100 % copper
conductor, 95% minimum braided shield
DATA 2 pair, twisted with overall shield, 26 AWG
minimum (Belden 8723 or equivalent)
POWER 3-CONDUCTOR, 22 AWG (Belden 19401 or
equivalent)
NOTE: For distances exceeding 50 feet for 24 V ac powered
cameras or 250 feet for 115 V ac powered cameras, please
contact an Applications Engineer at Cohu Electronics.
2.8 INSTALLATION
This section describes features of the rear
panel, mounting base, and other considerations
of interest when performing an installation.
2.8.1 Rear Panel
Most features of interest during installation and
servicing of the Camera appear on the rear
panel. These include:
1. 18-pin connector through which all signal and
power connections are made with the Camera
2. 5 PSI MAX Schrader valve (covered with re-
movable cap) for pressurizing the Camera with
dry nitrogen. To relieve pressure from the hous-
ing, removing the cap and pressing down on
or remove the valve stem.
Figure 13. Type CA-298A Cable Assembly, 115 V ac Input Power
Change 1

13
3. SAFETY relief valve to prevent over-pressuriza-
tion of the camera with dry nitrogen. This valve can
also serve to flow dry nitrogen through the Cam-
era to purge moisture out of it. Lift the valve “pop
cap” and hold it while introducing dry nitrogen
through the Schrader valve. If the internal desic-
cant bags have absorbed moisture, though, flow-
ing dry nitrogen through the housing will not dry
them.
4. PRESS RELIEF (pressure relief) hex head screw.
The snap ring that holds a Camera together can-
not be removed until this screw is removed. This
threaded hole passes completely through the rear
plate into the interior of the Camera. This ensures
that the ring cannot be removed with pressure on
the Camera. Never remove this screw without re-
leasing pressure through the Schrader valve.
5. PHASE 1 2 3 4 5 6 label. Not a rear panel func-
tion on this model camera. Line lock phase is es-
tablished with the RS-422 serial interface.
2.8.2 Mounting Considerations
Three 1/4-20 threaded screw holes on the base of
this Camera (figures 4 and 11) are intended for
securing it to a suitable platform. High strength
stainless steel bolts should be used. Never use less
than two bolts. Three are preferable.
2.8.3 Housing Pressure
The interior of the Camera housing must be main-
tained at a relative humidity near zero percent. This
has several benefits.
Figure 14. Type CA-299A Cable Assembly, 24 V ac Input Power
Change 1

14
One is to ensure that the inside of the window
does not fog with cold temperatures. Internal
Camera heaters usually maintain the faceplate
temperature above the dew point, but in ex-
treme cold conditions a Camera with internal
moisture could still fog up.
Also, zoom lenses can absorb moisture be-
tween lens elements in high humidity condi-
tions.
And other components inside the housing can
be damaged by increased levels of humidity .
For these reasons, positive pressure must
always be maintained on the Camera to pre-
vent moisture laden outside air from being
drawn in.
The Camera is normally pressurized with a
nominal 5 psig (pounds square inch gauge) of
dry nitrogen when serviced, but any positive
pressure (e.g., 0.5 psig) would actually be
sufficient. However a Camera with pressure
near one or two pounds is best recharged
before any further drop in pressure.
The Camera must be programmed with the
altitude above sea level for its installation
location. This calibrates the low pressure alert
circuit.
2.9 GUI SERIAL INTERFACE
Win MPC is used to control a single Camera
during installation or maintenance operations.
Initial setup can be done either at a central
shop facility or at the site location of the Cam-
era. Final field of view settings, however , must
be done on site to ensure proper coverage by
the lens.
2.9.1 Win MPC Setup
When Win MPC (figure 15) is used to set up
the Camera, it must be isolated from all other
Cameras in the system. This generally is no
problem since the Camera setup is performed
either at a test bench location or at the actual
camera site itself. If the address setting func-
tion of Win MPC were to be sent to multiple
Cameras they would all have identical addresses
programmed into their memory. Since all Cameras
(and other addressable equipment) in a system
must have a unique address, this would result in an
inoperative system.
2.9.2 Establishing Communications
Before any setups can be made, it is necessary to
establish communications with the Camera. Figure
16 shows the home screen of a typical version of
Win MPC. Proceed as follows:
1. Under the Special Functions menu area of the
window, click on “Camera Setup.” The Setup win-
dow menu should appear . Figure 17 shows the
Setup window of Win MPC with communications
functions. Table 5 summarized the required com-
munications selections:
WIN
MPC
Figure 15. Typical Win MPC Application
NOTE: The WinMPC GUI is updated frequently and
may differ slightly from the version shown in this
manual.

15
a. Port to “COM 1” (This is typically the serial port
being used on a PC, but COM 2, COM 3, or
COM 4 may possibly be the active port. Try
these other ports if communications cannot
be established using COM 1.)
b. Comm Mode “PC to MPC Receiver”
c. Baud Rate to “9600” (Click “Set Baud”)
d. Camera to “Day/Night” and Video to “NTSC”
e. Receiver to “iDome/iView Camera”
2. The following items on the Setup screen are not
related to establishing the serial communications
with a Camera.
a. Pan/Tilt. These selections do not pert ain to
this Camera.
b. Pan/Tilt Background. These selections do not
pertain to this Camera.
c. Set Elevation (0-10,000 ft): This setting is per-
formed in section 2.9.4
3. Click on “OK” to exit the Setup screen.
Figure 16. Typical Win MPC “Home” Screen

16
2.9.3 Setting Camera Address
Any data address in the range 1 to 223 can be
used for a Camera not connected into a control
system. This model Camera typically does not
connect into a control system. Thus, the RS-422
data lines to the Camera are used only during
installation and servicing. For such a stand-alone
Camera, a data address of 1 is preferable.
However, if the Camera were to be connected
into a control system using the RS-422 data
lines, then the camera must be set to a unique
address compatible with that system.
After initial setup, it is a good idea to allow Win
MPC to search for the existing Camera address
(figure 18). This will verify that communications
has been established.
Click on the FIND button at the upper left of the
screen. A pop-up window will appear while Win
MPC searches for all allowable Camera ad-
dresses (1 to 223).
Table 5. Communications Settings
Figure 17. Win MPC Communications Functions Screen
COMMUNICATIONS
FUNCTION SETTING
Port COM 1 (Typical. Verify)
Baud Rate 9600
Comm Mode PC to MPC Receiver
Camera Day/Night
Receiver iDome/iView Camera
Note: These selections appear on the Setup Screen
CAUTION: Win MPC is intended to be connected
to one Camera at a time . If it were to be con-
nected into a system of Cameras and the Ad-
dress Set Function used, all Cameras (or other
equipment) in the system would have their iden-
tifications set to the same ad dress.

17
Figure 18. Find ID Screen
Figure 19. Day/Night DSP Camera Functions Screen
If this is not the required address for this Camera,
then change the address to the required number
and click on “Set Address.”
Click on the FIND button again to confirm that this
new address has been accepted.
2.9.4 Pressurization Altitude Compensation
To ensure an accurate indication of low pressure in
the housing, the altitude above sea level where the
Camera will be installed must be stored in the
Camera. This information is entered in the Setup
screen.
1. Select “Camera Setup” on the Home screen (fig-
ure 16) to bring up the Setup screen (figure 17).
2. Enter the altitude above sea level in feet at the
“Set Elevation (0-10,000)” Do not use a comma in
numbers.
3. Click on the “Set” button to enter the data.
4. Click on the “OK” button to clear the screen.
2.9.5 Camera Functions Setup
The Day/Night DSP Camera Control screen (figure
19) consists of various setup settings for the Cam-
era. Two functions on this screen do not function
with this model Camera: Digital Zoom Range does
not apply and Clear NVRAM is a password pro-
tected function.

18
Figure 20. Message Programming
Screen
Note: This screen does not show previously programmed ID
Text or Alarm Text from the Camera when it is accessed. “Low
Pressure” is factory programmed in Line 3. This can be
changed if desired.
Figure 21. Tours and Sectors Setup
Screen (NOT USED)
When this screen is accessed the status of each
function will be displayed. If any change is made,
the “Status” button can be clicked to verify that the
Camera accepted the new setting.
The following settings are considered standard for
a typical installation:
1. Shutter: “Auto”
2. Line Lock: “Crystal” but “Line Lock” may be re-
quired depending on the synching requirements
for a multi-camera system. When line lock is se-
lected, the phase setting must be set so that the
Camera is in sync with the reference Camera in
the system.
3. Video Freeze: Of f. Never leave a camera in
the Freeze mode after doing maintenance or setup.
4. Day/Night Cntrl: “Auto” (This allows the cam-
era to automatically switch between color and
monochrome modes depending on the light level
on the scene. Low light levels (night time) switch
the Camera to monochrome mode.
5. WDR (Wide Dynamic Range): “Off” (But if the
Camera typically looks at high contrast scenes then
“On” might be the preferred setting.
6. White Balance: “Auto”
Note: This screen is shown for reference only. No
functions on this screen apply to the model 3930

19
2.9.5 Checkout Procedure
After communications has been established with the
Camera a functional test should be performed to
verify proper operation. Use the Win MPC interface
to perform tests and setups.
If the Camera is set to automatic day/night opera-
tion, cover the lens sufficiently to provide a dark
scene and note whether the Camera reverted to
monochrome mode for increases sensitivity.
If the line-lock mode has been set up, verify that
this Camera is in vertical sync with the reference
Camera.
If white balance is at its default Auto mode, note
whether the Camera maintains proper color with a
variety of different scenes.
Once it has been verified that the Camera is oper-
ating properly it can be released for use.
Be sure the Camera was not left in “freeze” mode
after servicing it. This mode stores an image and
maintains it as the display until being turned of f.
Removing power and reapplying also clears the
“freeze” image.
2.10 PREPARATION FOR SHIPMENT AND
STORAGE
For storage periods exceeding about one month,
seal the unit in a vapor-proof bag containing a
fresh desiccant pack.
Maintain the Camera storage environment within a
range of -40 to 70 °C (-40 to 158 °F).
For shipment, package with enough foam padding
or other packing material to prevent damage that
can occur during shipping. The original shipping
carton is a good container if it has not been dam-
aged or subjected to excessive moisture.
Please contact the Customer Service Department
for a Return Authorization (RA) number before
sending any shipments to the factory.
Prominently display the RA number on the outside of
the shipping container(s) and on paperwork con-
tained inside. Give a brief description of why the
equipment is being returned and list the symptoms
of any problems being experienced with the equip-
ment.
3.0 OPERATION
A standard installation of this Camera provides for
video back to the operator ’s control console without
any control functions being available. No features
of the Camera are controllable by an operator in
such an installation. The Camera is intended solely
for 24 hour a day viewing of video from a fixed
scene.
Note that if the Camera has been set up for day/
night auto switching, it may revert to monochrome
during low light conditions. This is entirely normal
when the auto switching feature has been turned
on during installation of the Camera.
During installation and maintenance, a local laptop
PC running Win MPC software can be used to
connect to the Camera at the on-site junction box
for control and setup of all available functions.
If dry nitrogen in the Camera housing dissipates to
reduce the pressure to a pre-set trigger point, a
“Low Pressure” message will be displayed on the
video image from the Camera. (The Camera is
shipped with this message pre-programmed, but if
it has been accidentally deleted during any setup
or maintenance operations it will, of course, not
appear.)
Also, other messages may be present on the
screen if they have been programmed into the
Camera. ˆ

20
Use these guidelines to maintain and recharge the 3930 series camera heads if needed.
4.0 Maintenance
The system is intended for long-term unattended use and the maintenance requirements are minimal:
• clean exterior as needed when the Camera is operated in a harsh environment
• clean the front window on the Camera head as needed
• check pressure periodically. Occasional pressurization of the Camera may be required. See section 4.1
for more details. Pressure can be checked remotely with CohuHD protocol by enabling the on screen
maintenance mode using WinMPC.
• check cables for deterioration and connectors for corrosion periodically
4.1 Camera Head Housing Pressurization
Before shipping from the factory dry packs of desiccant are secured inside the Camera housing. The housing
is then sealed and purged with dry nitrogen to remove moist air from inside the housing. The purging process
providesaninternalrelativehumidityofvepercentorless.TheCamerahousingisthenpressurizedtoap-
proximately 5-7 psi (pound per square inch ) and tested for leaks.
If the Camera head housing pressure drops to zero over a period of a few weeks, it is likely that a seal is leaking
and the Camera should be returned for servicing.
NOTE: It is not recommended to pressurize the Camera head to greater than approximately 5 psi.
However,duringoperationoftheCameraintheeldtheacceptablerangeofpressureinside
the Camera head housing is 0.5-10 psi due to temperature rise, elevation, etc.
Figure 22. Rear Plate
Schrader Valve Pressure Relief Valve
(shown with plastic tubing)