Heath Consultants Heath Data Recorder (HDR) - Manual (Page 8)

8
Battery Pack and Back-up Batteries
The HDR units utilize (1) 1.5-volt, encapsulated “D” cell alkaline battery as its primary power source. The pack supplied
with the HDR consists of an alkaline dry cell and a protection circuit. (Part number(s) on page 42)
NOTE: This battery is not rechargeable.
HDR units are shipped from the factory powered and ready to install in the field (unless otherwise specified).
The HDR incorporates an on board uninterruptible power supply. This consists of one factory installed “AA” lithium cell
(BT1) rated at 3.6 volts. This cell is easily replaced in the field.
The HDR incorporates an on board battery (CR2032) for backup of the profiler log. This consists of a replaceable button
style lithium battery (BT2) located on the component side of the PCB.
Normal battery voltage should be displayed between the ranges of 1.2 to 1.5 volts for a new battery, and when the primary
power drops below .8 volts, the unit will switch to lithium backup. Under normal conditions, the main battery pack
should last up to four years and the lithium backup battery should last up to 1 year without power from the main battery.
Caution: When the communication cable is connected to the instrument, higher than normal battery current is consumed.
Because of this, it’s recommended to limit the time connected to the instrument.
Caution: The maximum voltage allowed on the “Main battery” input is 2 volts DC. Only use the 1.5 volt battery pack
supplied by Heath. If this voltage is exceeded, a protection fuse will blow and the warranty will be voided.
Note: If all three batteries lose power, the data that is stored in non-volatile memory will not be lost. This includes
Calibration, Poly (transducer) and configuration data.
Caution: To maintain the Intrinsic Safe rating, use only proper replacement batteries: main battery pack HPN 77R91-
1037, Lithium backup battery, HPN 77R65-8001, and coin battery, HPN 77R65-8002.
Contact Heath Consultants Incorporated for replacement batteries and main battery packs. Refer to Periodic
Maintenance on pages 38-42 for replacement procedures & part numbers.
External Power
The HDR can be connected to an external power source (6- 15VDC). This connection is required when an external
modem is used due to the RS232 load on the instrument. A wiring harness is required to connect the external power to
the 12 volt source. Note: Contact Heath Consultants Incorporated to get this harness.