RH350-en-GB_V2.5 11/14
4
Backlight Display
Press the
[M
in
/AV
RST
]
and
[MEM]
buttons together to turn on the backlight. It will remain on for ten
seconds.
Automatic Power OFF
With the meter off, press and hold down the
[ON/OFF
SET
]
+
[REC
HOLD
]
buttons for more than 1
second to enter auto power off settings.
Press the
[MEM]
button to select non-sleep (n) or 2, 5, 10, 20, 40 and 60 minutes autosleep.
Press
[T2
▲
WB
]
to confirm the selection.
Manual Datalogging
Manual datalogging allows the user to store and recall up to 99 readings with the press of a button.
1. Press the
[MEM]
button to manually store a single reading into memory. The display will flash 3
times and the memory location number will be displayed below the humidity reading.
2. To view stored readings, press and hold the
[REC
HOLD
]
button for 2 seconds and “RECALL” will
blink next to the memory location number on the display.
3. Press the
[MEM]
button to manually increment through the stored readings.
4. Press
[REC
HOLD
]
+
[MEM]
for more than 1 second to clear the memory.
5. Press
[REC
HOLD
]
for more than 1 second to return to normal operation.
Note:
In RECALL mode, pressing the
[M
in
/AV
RST
]
button for min/max/avg readings will auto search
the stored readings in memory and display the minimum, maximum and average values of the
stored readings.
Note
: A printer port is located on the side of the meter; however it is not functional on this model.
Calibration
The following verification and calibration procedures require the 33% and 75% RH reference bottles
which are supplied with the Model RH350-CAL kit.
Accuracy Verification
Checking the 33% or 75% RH Calibration
1.
Insert meter’s sensor into the 33% or 75% salt reference bottle
2.
Check the reading after a minimum of 10 minutes
3.
Verify that the reading is within the accuracy specification
Relative Humidity Calibration (33% and 75%)
33% Calibration
1.
Turn the meter Off.
2.
Insert the meter sensor into the 33% salt reference bottle.
3.
Allow the meter one hour to stabilize.
4.
While holding down the
[M
in
/AV
RST
]
button, press and hold the
[ON/OFF
SET
]
button for 2
seconds to enter calibration mode.
5.
“
32.8%
” (reading may vary depending on operating temperature) will flash on the LCD
screen. After 30 minutes, the flashing will stop to indicate that the 33% calibration is
complete.
Note: Do NOT turn off the meter
6.
Proceed to the 75% Calibration below.
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