- 3 -
1. Power switch: turns the meter on or off
2. Auxiliary keys: SELECT, RANGE, SET, MAX/MIN, Timer/RS232/HOLD/2nd VIEW/ REL
△
SELECT:
Select
measurement mode
RANGE:
Select
measurement range. The meter is default at auto range mode.
SET:
When the SET button is in operation, the RANGE button is used as a moving up button ( ), the 2nd VIEW
button as a moving down button ( ), the MAX/MIN as a moving left button ( ), and REL
△
as a moving
right ( ). In this case, the RANGE, 2nd VIEW, MAX/MIN and REL
△
buttons’ original functions are
disabled.
buttons can be used to enter and adjust the setting values.
Press SET button for at least 2 seconds to start the backlight. Press this button again to turn off the backlight.
The backlight can auto off if this button is not engaged within 30 seconds.
MAX/MIN:
Press this button to enter the dynamic record mode, with maximum record period of 36 hours.
In the dynamic record mode, the meter automatically records the maximum value (MAX), minimum value
(MIN), difference value (MAX-MIN) and calculates the average value (AVG) of all readings. Press this
button to cycle MAX, MIN, AVG, and MAX-MIN on the secondary display.
Press
this button for at least 2 seconds, the meter returns to auto range.
Timer/RS232:
TIME:
TIMER function is enabled only in the REL
△
and MAX/MIN measuring mode.
Press TIMER key to start the secondary display for counting time. Press TIMER key again to turn off the
counting time display.
When the secondary display is display counting time, press key SELECT to enter Beeper setup for setting up
a timer for beeper. Then, press key REL
△
( ), MIX/MIN ( ), RANGE ( ), 2nd VIEW ( ) to input the
time. Next press key TIMER to validate the new time data. When the counting time exceeds the preset time,
the beeper sounds.
In the above two modes, press key HOLD to stop timer function and turn off secondary display, but the
preset time remains unchanged.
The time is displayed in the format of 8.88.88 on the secondary display. The max.counting time is 9.59.59
RS232:
Press this button for at least 2 seconds, the RS232 remote control is enabled for PC control and
communication with other instruments. The LCD displays “RS232”
Auto power off function is disabled in this RS232 programmable mode.
Press this button for at least 2 seconds again to exits this mode and return to normal mode.
HOLD:
Press this button, the meter enters auto data hold mode and “A-H” is displayed on the LCD.
The data hold mode allows users to hold the displayed value while the analog bar graph shows the current
reading.
Press
this button again, the meter enters Peak+ hold mode and a “PH+” appears on the LCD display.
Press
this button again, the meter enters Peak- hold mode and a “PH-” appears on the LCD display.
Press
this button for at least 2 seconds, the meter exits HOLD mode and return to normal mode.
