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Figure 6: Push Buttons
C
R
HART
ECORDER
Temperature Recorder
Calibration Check
This recorder has been accurately calibrated at the facto-
ry. Before making any adjustments, this instrument
should be in service for 24 hours. Thereafter, if any
adjustment is required, perform the following procedure:
1.
Place a Certified Test Thermometer(s) in a solu-
tion bottle(s) alongside the recorder's sensor
probe(s).
2.
Once the temperature has leveled out, compare
the position of the pen on the recorder to the
test thermometer's reading.
3.
If an adjustment is required, use the left (#1)
and right (#2) arrow pushbuttons on the recorder
to calibrate (or move) the pen's position on the
chart to correspond to the temperature of the
solution. The arrow buttons must be held for
approximately five seconds before the pen will
begin to move.
Chart Rotation Speed
To change the chart rotation speed, first unplug the unit
from the main power supply and disconnect the battery (if
the recorder has the optional battery back-up feature).
Next, press and hold the "chart change" button (#3) and
re-connect the recorder to the main power supply. Once
power to the recorder has been established, release the
"change chart" button (#3). NOTE: The pen(s) will not be
moving if this step is successfully completed. The LED
will begin flashing in sequence to show the current chart
rotation speed that is configured for the recorder:
Flash 1 time – 24 Hour
Flash 2 times – 7 Day
To change the chart rotation speed (of the current range
only), press and release the left button (#1) to select 24
hour rotation and press and release the right button (#2)
to select 7 day rotation.
O
M
PERATION AND
AINTENANCE
17
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