Campbell Scientific DCDC18R User Manual

DCDC18R Boost Regulator

Revision: 5/10

DCDC18R

BOOST REGULATOR

V in

(11-16)

V G 18V G

V out

MADE IN

USA

Copyright © 1999-2010

Campbell Scientific, Inc.

Warranty and Assistance

The DCDC18R BOOST REGULATOR is warranted by CAMPBELL
SCIENTIFIC, INC. to be free from defects in materials and workmanship
under normal use and service for twelve (12) months from date of shipment
unless specified otherwise. Batteries have no warranty. CAMPBELL
SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or
replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
The customer shall assume all costs of removing, reinstalling, and shipping
defective products to CAMPBELL SCIENTIFIC, INC. CAMPBELL
SCIENTIFIC, INC. will return such products by surface carrier prepaid. This
warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products
which have been subjected to modification, misuse, neglect, accidents of
nature, or shipping damage. This warranty is in lieu of all other warranties,
expressed or implied, including warranties of merchantability or fitness for a
particular purpose. CAMPBELL SCIENTIFIC, INC. is not liable for special,
indirect, incidental, or consequential damages.

Products may not be returned without prior authorization. The following
contact information is for US and International customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit
www.campbellsci.com to determine which Campbell Scientific company
serves your country.

To obtain a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an applications engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container.
CAMPBELL SCIENTIFIC's shipping address is:

CAMPBELL SCIENTIFIC, INC.

RMA#_____
815 West 1800 North
Logan, Utah 84321-1784

For all returns, the customer must fill out a “Declaration of Hazardous Material
and Decontamination” form and comply with the requirements specified in it.
The form is available from our website at
completed form must be either emailed to [e-mail]
435-750-9579. Campbell Scientific will not process any returns until we
receive this form. If the form is not received within three days of product
receipt or is incomplete, the product will be returned to the customer at the
customer’s expense. Campbell Scientific reserves the right to refuse service on
products that were exposed to contaminants that may cause health or safety
concerns for our employees.

www.campbellsci.com/repair

. A

or faxed to

DCDC18R Table of Contents

PDF viewers note: These page numbers refer to the printed version of this document. Use
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1. General Description.....................................................1

2. Specifications ..............................................................1

3. Installation....................................................................2

4. Grounding ....................................................................3

Figures

1. DCDC18R ..................................................................................................1

2. Wiring for DCDC18R ................................................................................2

3. DCDC18R on CR5000...............................................................................3

4. Schematic of Charging and Grounding Circuitry.......................................4

i

DCDC18R Boost Regulator

MADE IN

USA

(11-16)

V G 18V G

V in

DCDC18R

BOOST REGULATOR

V out

1. General Description

The DCDC18R Boost regulator is intended to accept an 11 to 16 VDC input
and boost it to 18 VDC. Its main use is to boost automobile supply voltages to
the 17 VDC minimum required to charge the batteries in the CR3000, CR5000,
or CR23X LA bases. It can be conveniently bolted onto the side of the LA
base next to the charger input.

2. Specifications

FIGURE 1. DCDC18R

Input Voltage: 11 to 16 VDC
Output Voltage:
Quiescent Current 4 mA
Maximum Output Current: 1 Amp
Maximum Input Current 2.25 Amps
Power Conversion Efficiency 80 to 90%
Temperature Range:

18 V ± 5%

*

-40 to +60°C

1

DCDC18R Boost Regulator

Note

3. Installation

This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be
required to correct the interference at his own expense.

*

The slow start boost regulator typically starts to work at a supply voltage of
about 10 volts. Supply voltages below 10 volts pass directly to V out (through
2 Schottky diodes dropping the voltage by ~ 0.6 volts). With the DCDC18R
operating at the maximum output current (18 V * 1 A = 18 W) the input power
required is up to 18 W / 0.8 efficiency = 22.5 watts; that is the maximum
current specification of 2.25 Amps at 10 volts.

Nominal 12 Vdc
12 V

2

Charging Input

FIGURE 2. Wiring for DCDC18R

DCDC18R Boost Converter

19 20

17 18

15 16

13 14

11 12

910

12

SE

2

1

HL

HL

DIFF

HL

4

3

HL

HL

6

5

HL

HL

8

7

HL

78

56

34

HL

10

9

HL

DIFF

CR5000

Measurem

SE

25 26

23 24

21 22

12

11

H L

H L

H L

VX1

VX3

VX2

VX4

G

C6

C5

C7

C8

G

CONTROL I/O

POWER

Logan, Utah

ent and Control System

27 28

14

13

H L

CAO1

CAO2

IX1

>2.0V

G

<0.8V

5V

UP

16

15

HL

H L

IX2

IX3

IX4

IXR

P1

5V

G

SDI-12

12V

G

SDM-C1

'

,

_

A B C

Hm

1

G H I

J K L

Graph/

char

4

P R S

T U V

End

7

- + (
* / )

Del

Ins

SN:

SDM-C2

2

5

8

0

P1

SDM-C3

17

H L

CONTROL I/O

C1C2C3

G

12V

POWER OUT

D E F

PgUp

3

M N O

6

W X Y

PgDn

9

< = >

ESC

18

H L

G

SW-12

CURSOR

Spc Cap

BKSPC

ENTER

C4

SW-12

G

ALPHA

SHIFT

$ Q Z

19

H L

G

12V

G

POWER IN

11 - 16 VDC

MADE IN USA

CAUTION
DC ONLY

12V

20

H L

RS-232

COMPUTER

GROUND

LUG

39 40

37 38

35 36

33 34

31 32

29 30

FIGURE 3. DCDC18R on CR5000

CS I/O

(OPTICALLY ISOLATED)

pc card

status

DCDC18R

BOOST REGULATOR

V in

(11-16)

V

G 18V G

V out

MADE IN

USA

4. Grounding

Caution

The DCDC18R is installed near the datalogger, either on the side of the
datalogger (Figure 3) or to the back panel of the enclosure. The voltage input
is connected to 12 volts and ground from the supply source. The leads from
“V out” go to the charging input. The G lead from “V out” connects to either
charge input terminal and the 18 V lead connects to the other. The polarity of
the inputs does not matter.

The datalogger must be grounded for its transient
protection to work. CONNECTIONS TO THE CHARGING
INPUT DO NOT PROPERLY GROUND THE
DATALOGGER. The Ground connection should be made
at the grounding lug on the wiring panel.

A full-wave bridge rectifier is included on the CR3000, CR5000, and CR23X
LA bases and the PS100. This creates a diode drop (0.7 V) between the
datalogger ground and the return side of the charging input (Figure 4). If the
datalogger ground (ground lug) and the return side of the charging input (G
terminal of the DCDC18R) are tied together through a wire, then the return
current to the DCDC18R will flow through this wire rather than through the
diode in the bridge rectifier. This is a valid connection and does not cause

3

DCDC18R Boost Regulator

measurement problems because the CR3000, CR5000, and CR23X have star
ground connection at the ground lug. However, unwanted ground loops that

induce single-ended measurement offsets will be generated if the

terminals

and the return side of the charging input are tied together because the return
current to the DCDC18R will flow through the

terminals.

Datalogger LA Base or PS100

Datalogger

FIGURE 4. Schematic of Charging and Grounding Circuitry

4

Campbell Scientific Companies

Campbell Scientific, Inc. (CSI)

815 West 1800 North

Logan, Utah 84321

UNITED STATES

www.campbellsci.com • [e-mail]

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PO Box 2450

Somerset West 7129

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PO Box 444

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Rua Luisa Crapsi Orsi, 15 Butantã

CEP: 005543-000 São Paulo SP BRAZIL

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11564 - 149th Street NW

Edmonton, Alberta T5M 1W7

CANADA

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300 N Cementerio, Edificio Breller

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COSTA RICA

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Campbell Park

80 Hathern Road

Shepshed, Loughborough LE12 9GX

UNITED KINGDOM

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Miniparc du Verger - Bat. H

1, rue de Terre Neuve - Les Ulis

91967 COURTABOEUF CEDEX

FRANCE

www.campbellsci.fr • [e-mail]

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Avda. Pompeu Fabra 7-9, local 1

08024 Barcelona

SPAIN

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Please visit www.campbellsci.com to obtain contact information for your local US or International representative.