Holland Electronics ST-5128S - Manual (Page 7)

6
POWERING THE METER
The digital signal level meter can either be powered by an external AC voltage
source or by the internal rechargeable NiMH batteries.
A) Using an external AC source – Insert the DC output plug of the
(ST5128-30001) DC adapter / charger into the DC jack of the ST5128
meter. Plug the adapter / charger into a 110 V AC source.
B) Powering the meter with internal batteries - In order for the ST5128
meter to operate from the internal batteries, a sufficient charge must
exist on the batteries. The recommended charging time for low
charged batteries is 8 eight hours. Charging the batteries occurs when
the (ST5128-30001) charger is used to power the meter from an
external AC source. The batteries charge whether the meter is
switched on or off.
C) The battery charge level is indicated by a bar graph at the bottom of
the screen in the single channel measurement mode.
The meter produces an audible low battery alarm which repeats every
2 seconds indicating that the internal battery voltage is too low and the
batteries need to be recharged. When this occurs, the meter will shut
off unless the DC adapter/charger is connected immediately.
The ST5128 shuts down automatically to conserve battery power if no
buttons are pushed for 10 minutes.
GETTING STARTED
1. Push the PWR button to turn on meter.
2. The display will show the model and the serial numbers of the unit before
automatically returning to the mode that was last used prior to turning off the
meter.
3. Carefully thread the f- type barrel splice adapter into the input port. Tighten
by hand until snug.
CAUTION: If using a wrench, do not exceed 5 inch/lbs. of torque. Over
tightening will seriously damage the input port creating an open
connection at the input.
Note: The LCD back light is automatically enabled when the meter is turned on.
Disabling the back light by pressing the

key will extend the operating time of
the battery before recharging is necessary.