Murphy HD35-CD, HD35-DC User Manual

Digital Time Meters

Duracell PX28L
6 VDC Lithium
Battery (located
under removable
rubber seal)

Mounting

Clamp

3-5/8 in

(92 mm)

Terminal

Screws

3-1/8 in

(79 mm)

®

®

Models HD35-DC and HD35-CD

SELECTRONIC

HD-9015B

Revised 08-93

Catalog Section 20

• Solid-State

• Memory Retention

• Lighted Liquid

Crystal Display

• Models for Battery,

AC Voltage or CD
Ignition Applications

®

®

Description

The HD35 Series time meters are low input power, elapsed
time meters that record the operating time of vehicles or
powered equipment. Timing is by highly accurate and
reliable quartz based circuitry. Elapsed time is displayed by
a 5-digit Liquid Crystal Display (LCD) which can read up to
9,999.9 hours. The LCD can be powered by either an
external battery or DC voltage source. An AC line voltage
or a capacitor discharge (CD) ignition can also be used.
The elapsed time is maintained by a replaceable 3-year
lithium battery when power is removed. The HD35-DC
provides backlighting of its LCD display. The backlighting is
powered by a separate DC power source.

Features

Timer initiation begins when external power is applied to
the input terminals and stops when power is removed. The
display can be reset to zero through an external switch
closure; it is also self zeroing at 9,999.9 hours. A winking
display decimal point indicates that the timer is active. The
display remains on when power is removed. Memory is
maintained by the internal battery.

Specifications

Supply Voltage

HD35-DC:
HD35-CD:

Supply Current

HD35-DC:
HD35-CD:

Operating Temperature: -4 to 158°F (-20 to 70°C)
Storage Temperature: -85 to 212°F (-65 to 100°C)
Display Light Supply Voltage: 10-48 VDC or 24 VAC

10-48 VDC or 24 VAC
120-250 VAC or CD-Ignition 75-280 VDC

50 µA @ 10 VDC; 3.5 mA @ 40 VDC
53 µA @ 75 VDC; 270 µA @ 280 VDC

Dimensions

Side View

Mounting Hole: 3-7/16 in. (87 mm)
Approximate Weight: 14 oz. (0.4 kg)
Approximate Dimensions: 5-

140 mm)

1

/2 x 5-1/2 x 5-1/2 in. (140 x 140 x

Back View

(2)

5

1

2

3

4

6

7

8

9

Remote

Start

Jumper

(5)

Display

Lighting

(6)

Connect to:

Reset

(3)

CAUTION:

use only to

reset timer

to zero.

(1)

10-40 VDC

or 24 VAC

Input

(4)

Positive and

Negative

Power Source

or

*

*

(2)

Connect to:

Reset

5

1

2

3

4

6

7

8

9

Remote

Start

Jumper

(5)

(3)

CAUTION:

use only to

reset timer

to zero.

(1)

120-250 VAC

(4)

Positive or

Negative

Ground CD

Ignition Leads

or

*

*

Typical Wiring Diagrams

®

FRANK W.

MFR.

WARNING: The wiring diagrams below are
shown for clarity only.

HD35-CD

1. 120-250 VAC; CD ignition power.

2. Terminals 7 and 8 are connected with a factory installed

jumper which initiates a timer immediately after power is
applied between terminals 3 and 4.
To initiate the timer by a remote switch remove the
factory installed jumper between 7 and 8.

3. Connecting terminals 5 and 6 resets the timer to zero.

4. Connect terminal 3 to positive ignition lead.

Connect terminal 4 to negative ignition lead.

5. When replacing battery use only Duracell PX28L
6 VDC Lithium battery. CAUTION: Unless
external power is applied on terminals 3 and 4,
timer will zero when battery is removed.

HD35-CD

HD35-DC

1. 10-40 VDC/24 VAC input.

2. Terminals 7 and 8 are connected with a factory installed

jumper which initiates a timer immediately after power is
applied between terminals 3 and 4.
To initiate the timer by a remote switch remove the
factory installed jumper between 7 and 8.

3. Connecting terminals 5 and 6 resets the timer to zero.

4. Connect terminal 3 to power positive.

Connect terminal 4 to power negative.

5. When replacing battery use only Duracell PX28L
6 VDC Lithium Battery. CAUTION: Unless external
power is supplied on terminals 3 and 4, timer
will zero when battery is removed.

6. Display lighting requires 10-40 VDC/24 VAC.

How to Order

Specify:

HD35-CD for 120-250 VAC/CD-Ignition
HD35-DC for 10-40 VDC/24 VAC

HD35-DC

Warranty

A two year limited warranty on materials and workmanship
is given with this Murphy product. Details are available on
request and are packed with each unit.

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

Since 1939

■ Frank W. Murphy Manufacturer

P.O. Box 470248; Tulsa, Oklahoma 74147; USA

tel. [phone] fax [phone]
e-mail [e-mail]

■ Frank W. Murphy Southern Division

P.O. Box 1819; Rosenberg, Texas 77471; USA

tel. [phone] fax [phone]
e-mail [e-mail]

Printed in U.S.A.

■ Frank W. Murphy, Ltd.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.

tel. [phone] fax [phone] tlx 477088
e-mail [e-mail]

■ Frank W. Murphy Pte., Ltd.

26 Siglap Drive; Republic of Singapore 456153

tel. [phone] fax [phone]
e-mail [e-mail]

■ Murphek Pty., Ltd.

1620 Hume Highway; Campbellfield, Vic 3061; Australia
tel. [phone] fax [phone]

■ Murphy de México, S.A. de C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384

tel. [phone] fax [phone]
e-mail [e-mail]

■ Murphy Switch of California

P.O. Box 900788; Palmdale, California 93590; USA

tel. [phone] fax [phone]
e-mail [e-mail]

■ Frank W. Murphy France

tel. [phone] fax [phone]

1090069