GHM DeltaOHM HD2010UC, Operating Manual

Page: 78 / 134

HD2010UC
- 78 -
V4.2
E
LECTRICAL
C
HARACTERISTICS
Pre-heating time
Lower than 10 seconds.
Power Supply

Batteries: 4 alkaline or rechargeable AA 1.5V internal batteries. The sound level meter does
not have a battery charger.

Autonomy: >12 hours in RUN mode with alkaline good-quality batteries. Amounting to 8
hours when using the outdoor microphone unit HD WME fitted with heated preamplifier.

External batteries: It is possible to connect external batteries to the sound level meter through
the male connector for external power supply (
∅
5.5mm socket). The positive (pole) power
supply must be connected to the central pin. The battery should supply 9 ÷ 12 V at about
200mA/h. The maximum limit for external power supply is 15V.

Mains: mains adapter with 9-12Vdc/300mA continuous voltage.

Switch-off: selectable auto-power-off.
When battery voltage falls below 3.9V, the sound level meter cannot perform any measurement.
However it is possible to access and download the data in the internal memory. Under 3.5V, the
instrument will automatically shut off. Logged data and configuration parameter are maintained
even without power supply.
Input maximum levels
The maximum tolerable sound level with UC52 microphone is 146 dB.
The level of the electrical signal applicable to the microphone input, despite the replacement of
the microphone capsule with the proper capacitive adapter, must not exceed 10Vrms.
LINE Output

3.5mm
∅
mono jack

Preamplifier output signal

Unweighted output protected against short-circuit
Gain: ~ .3 mV/Pa and ~30 mV/Pa respectively for an input gain equal to 0 dB and 20 dB, not
calibrated

Linearity: 100 dB with maximum output level equal to 1.2Vrms

Series impedance: 1kΩ

Typical Load
: 100kΩ
DC Output

2.5mm
∅
mono jack

Short-circuit protected output

A weighted output with FAST time constant updated 8 times/s

Gain: 10 mV/dB

Linearity: 80dB

Series impedance
: 1kΩ

Typical Load
: 100kΩ