- 7 -
3.3
Batteries
The instrument uses three AA alkaline batteries. Battery life > 200
hours (without backlight). When the display shows symbol as
shown in Figure-3, replace the battery.
3.4
Instrument Socket
The instrument sockets are protected by grey rubber sealing cap, as
shown in Figure-4.
•
Eight-pin socket (right) - connect DO electrode. When
inserting the probe connector, align the notch on the
connector to the socket, and twist the nut to tighten. There is
a sealing ring between the end face of the socket and the
connector, which can effectively maintain the waterproof rating
of the socket.
•
BNC socket (left) - connect salinity electrode
•
RCA socket (middle) - connect temperature probe
3.5
Display mode
3.5.1 Main Display Screen
If the salinity probe is not connected or salinity is lower than 1ppt, only
the DO value and temp. value will be displayed on the screen as
shown in Figure-5, DO value: 8.18mg/L; temp. value: 25.2
℃
.
When salinity probe is connected and salinity is greater than 1ppt,
salinity will be displayed on the bottom right of the screen, as shown
in Figure-6, DO value: 6.97mg/L, Temp value: 25.2
℃
; Salinity: 32ppt,
Press to switch beteen unit of mg/L→%. Or select unit of mg/L or
ppm. Time displays on upper right of the screen.
3.5.2 Reading Stability Mode
When the measured value is stable, the LCD screen displays the icon
as shown in Figure-7. If there is no icon or it’s flashing,
it means that the reading is not stable yet, and it
should not be read, saved or calibrated.
3.5.3 Auto Lock Mode
In parameter setting P4.3 you can select the auto-lock mode (Off-On)
,
Select
On
to turn on automatic locking. When the reading is stable
for more than 10 seconds, the meter automatically locks the measured
value and displays the
HOLD
icon, as shown in Figure - 8. When auto.
locked, press to unlock. Select
Off
to turn off automatic lock.
Fig.-3
Fig.-7
Fig.-8
Fig.-5
Fig.-6
Fig.-
4