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Procedure
Switch on the instrument; the upper display will show
“COnf”. Press the button; the upper display will show
“CAL”.
Using the and pushbuttons (buttons), it is possible
to select between ON and OFF. To go to the next
parameter without modifying the calibration, press the
FUNC button when the display shows “OFF”. To enter a
calibration value, press the FUNC button when the dis-
play shows “ON”.
Press the FUNC button to show the first calibration code
on the lower display. Repeatedly press the FUNC button
until the desired calibration (parameter) code appears.
NOTE: by pushing the SMRT button it is possible to go
back to a previous parameter without memorizing the
new calibration.
Entering Calibration Values
Following is a detailed, sequential procedure for entering
and checking values for each calibration parameter:
tL TC Input Initial Scale Value
a) Connect calibrator and instrument as shown in
Figure 2.
10
9
Figure 2. Calibrator Connection
b) The upper display shows “OFF”, the lower displays
shows “tL”.
c) Set calibrator to 0.000 mV.
d) Push the button; the display changes to “ON”.
e) After a few seconds, start calibration by pushing the
FUNC button. When this calibration is complete, the
instrument will go to the next parameter.
tH TC Input Final Scale Value
a) Set the calibrator to 60.000 mV.
b) Push the
button; the displays will show “ON”
and “tH”.
c) After a few seconds, start calibration by pressing the
FUNC button. When this calibration is complete, the
instrument will go to the next parameter.
t. TC Input Check
The display (Figure 3) shows “t.” followed by a number
showing the measured value in counts:
t.300
00
Figure 3. TC Calibration Check Display
a) Check the calibration (linear) by setting:
0.000 mV – the readout must be equal to
“t.000 00” ± 10 counts;
60.000 mV – the readout must be equal to
“t.300 00” ± 10 counts;
30.000 mV – the readout must be equal to
“t.150 00” ± 10 counts.
b) Push the FUNC button to go to the next parameter.
rJ Cold Junction Compensation
NOTE: Make sure tL and tH are correctly calibrated
before attempting rJ calibration.
a) Measure the temperature close to terminals 9 and 10
using an appropriate instrument – for example,
MEMOCAL. See Figure 4.
7sl-6-00.p65 9/17/02, 2:44 PM31