HD-9015B
Revised 08-93
Catalog Section 20
Digital Time Meters
Models HD35-DC and HD35-CD
• Solid-State
• Memory Retention
• Lighted Liquid
Crystal Display
• Models for Battery,
AC Voltage or CD
Ignition Applications
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®
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SELECTRONIC
Description
Dimensions
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.
Duracell PX28L
6 VDC Lithium
Battery (located
under removable
rubber seal)
Back View
Mounting
Clamp
Terminal
Screws
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.
3-5/8 in
(92 mm)
Specifications
Supply Voltage
Side View
HD35-DC: 10-48 VDC or 24 VAC
HD35-CD: 120-250 VAC or CD-Ignition 75-280 VDC
Supply Current
HD35-DC: 50 µA @ 10 VDC; 3.5 mA @ 40 VDC
HD35-CD: 53 µA @ 75 VDC; 270 µA @ 280 VDC
3-1/8 in
(79 mm)
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
Mounting Hole: 3-7/16 in. (87 mm)
Approximate Weight: 14 oz. (0.4 kg)
Approximate Dimensions: 5-1/2 x 5-1/2 x 5-1/2 in. (140 x 140 x
140 mm)
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