Campbell GRANITE User manual

04/2021
Copyright © 2021
Campbell Scientific, Inc.
GRANITE
CHASSIS
Chassis for GRANITE
Data-Acquisition Systems

Table of contents
1. Introduction 1
2. Precautions 2
3. Initial inspection 3
3.1 Inspect packaging 3
3.2 GRANITE CHASSIS parts 4
4. QuickStart 5
5. Overview 7
6. Specifications 9
6.1 Physical specifications 9
6.2 Electrical specifications 10
7. Mounting and installation 11
7.1 Recommended module locations 11
7.2 GRANITE modules 12
7.3 Orientation 12
7.4 Rackmount 12
7.5 Tie-downs 13
8. Wiring 14
8.1 Grounding CHASSIS 14
8.2 Power bus 14
8.3 Routing user-installed cables 16
9. Top and rear panels 16
10. Linking multiple CHASSIS 18
11. Maintenance 18
11.1 Battery maintenance 19
Table of Contents - i

1. Introduction
The GRANITE™CHASSIS is a strong metal enclosure that delivers optimized thermal management
and mounting convenience for a collection of GRANITE-series data acquisition (DAQ) modules.
As a system that includes a rechargeable backup battery, it can be portable or stationary. Power
can be supplied by AC or DC sources such as solar or rackmounted wall-power. Configuration
versatility suits many demanding applications and operational environments.
NOTE:
The terms DAQ and data logger may be used interchangeably throughout this manual. While
there may be subtle differences depending on context or opinion, ultimately a DAQ or data
logger is the primary controller of a data acquisition system.
FIGURE 1-1. Typical CHASSIS setup
GRANITE CHASSIS 1

2. Precautions
lEnsure the CHASSIS is grounded electrically in one of the following ways:
oAC power source includes a service ground that complies with current national and
local building and electrical codes.
NOTE:
The Detachable Power Cord used with the CHASSIS includes a ground conductor;
therefore, the CHASSIS will be grounded when the power cord is plugged into a
receptacle that has a functioning service ground.
oVehicle or Earth ground connection is made to either one of the ground lugs inside
the CHASSIS when:
nThe CHASSIS is used in vehicle testing applications
nService ground does not exist or is not functional
nThe CHASSIS is installed with only a DC power source (for example, a solar
pannel)
NOTE:
Use the largest gauge wire available, up to 8 AWG, for grounding.
NOTE:
To avoid ground loops, only allow a single path to ground. The second
grounding lug is intended to connect subsequent devices that need to be
grounded, such as one or more daisy-chained CHASSIS or GRANITE
modules that are mounted external to the CHASSIS.
lAlways use safe lifting practices when moving the CHASSIS; hold weight firmly with the
built-in handles, close to body and lift with legs in a smooth, continuous motion. Do not
twist while lifting, and do not attempt to move the CHASSIS with poor leverage, in
awkward positions, or with non-fluid motions.
lWear reinforced-toe footwear when moving the CHASSIS to prevent foot injury that could
result from dropping the CHASSIS.
lDo not drop the CHASSIS.
GRANITE CHASSIS 2

lRemoving the CHASSIS panels will expose electrical and mechanical hazards, including AC
electrical connections and high-speed fan blades. If required, always remove all power
sources including the internal battery prior to removing panels.
lDo not remove any specialty hardware such as star or torx head countersunk screws. See
Maintenance (p. 18).
lTable 2-1: Symbols used on the CHASSIS
Symbol Description
Direct current
Alternating current
Earth (ground) terminal
Protective conductor terminal
Caution, possibility of electric shock
3. Initial inspection
3.1 Inspect packaging
Upon receiving the GRANITE CHASSIS, inspect the packaging and contents for damage. Claims
for shipping damage must be filed with the shipping company.
Locate the order packing slip and compare the items listed on the packing slip to the items that
were shipped. Report any discrepancies to Campbell Scientific.
GRANITE CHASSIS 3

3.2 GRANITE CHASSIS parts
Each CHASSIS is shipped with a box of tools and parts used to install GRANITE DAQ and
measurement modules (purchased separately). The following table shows the common parts and
tools used in CHASSIS setup. Some of the items should be saved for future use.
Description Image
Module Power Jumper for GRANITE CHASSIS
12 V Power Jumper for GRANITE CHASSIS
Green 4-Pin Terminal Connector with Click Lock for GRANITE
Products
Red and Black Power Cables (12 AWG) set of 2, 15-inch for GRANITE
CHASSIS
Flat-Bladed Screwdriver
#2 Phillips Screwdriver, 6-inch shaft
GRANITE CHASSIS 4

Description Image
Screw, #6-32 x 0.437, Self-locking
15 A Detachable Power Cord
4. QuickStart
The CHASSIS can be operational within minutes. The following steps are provided as a guide to
get started.
WARNING:
Turn power off while installing hardware and making electrical connections.
Set the CH400 Power Switch to Off before starting installation.
1. Use a #2 Phillips Screwdriver to loosen screws for module mounting.
NOTE:
Mounting screws only need to be loosened two to three turns.
GRANITE CHASSIS 5

2. Mount the CH400, if used, in left-most position, otherwise mount GRANITE DAQ here.
Mount other measurement modules. See Mounting and installation (p. 11) for more details.
FIGURE 4-1. Typical CHASSIS setup
3. Using the Flat-Bladed Screwdriver press firmly in the small slot of the Green 4-Pin Terminal
Connector to open the wire slot. Insert the end of the black wire into the wire slot on the
CH400 BATTA–. Remove the screwdriver to close the wire slot. Repeat with the red wire in
the adjacent CH400 BATTA+ slot.
TIP:
Wires with ferrules can be pressed firmly into the wire slot. You do not need to open it
first.
4. Connect the other end of the black wire to a second Green 4-Pin Terminal Connector on
the CHASSIS BATT– and the red wire to BATT+.
5. In a similar fashion, connect a third Green 4-Pin Terminal Connector from the CH400
CHGA- and CHGA+ to the CHASSIS CHG– and CHG+.
GRANITE CHASSIS 6

6. Plug the Temp cord, with stereo plug, into the CH400 BATT A Temperature port. See
FIGURE 4-1 (p. 6) for steps 6 through 10.
7. Install 12 V Power Jumper between the CH400 and CHASSIS Fan Power terminals.
8. Connect one Module Power Jumper from the CH400 Switched 24V power out to the
CHASSIS Power Bus Input terminal.
9. Connect Module Power Jumpers between the CHASSIS Module terminals and the DAQ and
each GRANITE measurement module.
10. Install CPI and EPI (Ethernet) cables between the GRANITE measurement modules and the
DAQ.
11. Plug the Detachable Power Cord into the rear of the CHASSIS then into a wall socket.
12. Set the CH400 Power Switch to On.
13. Check the LED lights on each measurement module to verify they are powered.
14. Set the CH400 Power Switch to Off.
15. Install the remaining system wiring such as sensors and control devices. Refer to device
manuals for more information.
16. Set the CH400 Power Switch to On.
17. Program the DAQ, configure devices, and test the system. Refer to device manuals for more
information.
5. Overview
GRANITE-series DAQs and GRANITE expansion peripherals, though independently modular, can
be mounted in one or more CHASSIS to improve convenience in portability, gain efficiency in
testing operations, and optimize overall system performance.
The GRANITE CHASSIS includes a high performance 8-Ah onboard battery. Typically this battery
is trickle charged using a CH400 (see FIGURE 4-1 (p. 6)) or other regulator such as the one built-
in to the GRANITE 6 DAQ. See the following figure. For complex battery configurations refer to
the CH400 product manual.
GRANITE CHASSIS 7

FIGURE 5-1. Typical wiring for GRANITE 6
Features:
lThree CHASSIS power configuration options:
o36VDC, 600 W AC/DC Power Supply
o24VDC, 250W AC/DC Power Supply
oNo internal power supply
lUser-customizable top and rear panels
lConfigurable layout
lHigh-performance operations even at maximum operating temperatures
GRANITE CHASSIS 8