Murphy Automobile Parts HD35 CD User Manual

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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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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