Holland Electronics ST-5120 - Manual (Page 8)

4. Power Level Measurement in Frequency Mode: Press the MHz key to enter the
Frequency Power Level measurement mode. Select the desired frequency by using
the 
keys. (Note that the cursor will be moved to the right of “MHz”).
Fig.
4.1 a Fig. 4.1 b
If the frequency selected is not on the Standard Channel Table, the display will show ???
as the CH number. (see fig. 4.1b)
To return to channel measurement mode, press the SYS key twice.
5. Volume and LCD contrast level adjustments: In the Channel or Frequency Power
Level measurement modes, press the button to choose between Volume or
Contrast level adjustment. Adjust the Volume or Contrast levels using the 
keys.
6. AC voltage measurement: Press the key to enter the Voltage measurement
mode. The input range is 10 – 100 vac. The meter will alarm if the input exceeds 100
vac. Exit this mode by pressing the key again.
Care and Maintenance
1. Please keep the meter clean and dry. Don’t place the meter in a harmful environment
(dust, acid, alkali or moisture). Never clean the surface of the meter with organic
solvent, acid or alkali solvent.
2. Avoid vibrating the meter. Never allow an external force to press against the LCD
window, so as not to damage the display screen.
3. Do not drop the meter
4. Do not over tighten the G-F81 type connector at the input port.
5. When charging, use only the special charger supplied with the meter. Fully charge
the batteries at least once every six months if not in use for an extended period.
134 CH 50.7 dBmv
853-25 MHz
??? CH 50.4 dBmV
855.25 MHz
AC – VOLT
100.0 V AC – VOLT
60.0 V