The optional AC adapter gives
you the flexibility of operating
from an AC power source in your
work station or laboratory. The
AC adapter is not included with
your meter; order separately on
page 23.
1.
Insert the AC jack as shown in
figure at right.
2.
Switch off the meter before
plugging the adapter into the
power source.
This safety precaution protects
the software in your meter.
3.
Press the ON/OFF button to
switch meter on.
4. Calibration
Temperature Calibration
NOTE:
You don't need to calibrate the temperature unless there is a significant
difference between the indicated meter temperature and a verified
temperature standard.
Calibrate the temperature as follows:
1.
Determine the amount of adjustment needed:
i) Determine the temperature offset value currently used by
the meter, To, by pressing OFF, then ON. The offset value
displays for about 2 seconds just after the test screen has
To = __________
appeared and before the current readings are shown.
ii) Measure the temperature with this meter, Tm.
Tm = __________
iii) Measure the temperature with a verified
temperature standard, Ts.
Ts = __________
iv) Calculate the new temperature offset value, Tnew, by
adding the results in steps (a) and (b) and subtracting
the results in (c): Tnew = To + Tm – Ts.
Tnew = __________
Other Connections
Three other connections are
available:
• Serial output for temperature
and humidity
• Analog output for humidity
• Analog output for temperature
Make these connections according to
figure at right. See page 20 for an
explanation of how these connec-
tions may be used.
8
9
3.3
3.4
4.1
Bottom view with cover removed,
showing output connections.
Front of meter
Serial
humidity
output
(TTL)
Analog
humidity
output
Analog
temperature
outlet
Connecting the Optional AC Adapter
2.
Press OFF
.
3.
Press ON and PRG simultaneously
and hold until the screen displays
“CAL”. Release the keys. The screen dis-
plays the current temperature offset
value, To, with the first digit flashing.
See figure
4.
Change the temperature offset value to
the new temperature offset value, Tnew,
calculated above in step 1 (iv).
i) Press Mn/Mx to change the flashing
digit to the first digit of Tnew.
The number will change each time
Mn/Mx is pressed from 0 to 1, 2, 3,
–3, –2, –1, –0.
ii) Press NEXT. The other digit flashes.
iii) Press Mn/Mx to change flashing
digit to the second digit of Tnew.
5.
Press PRG
and hold until the screen
displays “SA”, for “saved”.
6.
Press OFF.
The new temperature offset
value will now be used.
A
A
