Chapter 2 — The Quad Tc/mV Amp
11
You can stop the signal scrolling by clicking the Pause button at the top
right of the display area
. Click the Scroll button
to resume
scrolling.
You can shift and stretch the vertical Amplitude axis to make the best
use of the available display area (see the Input Amplifier dialog in the
Chart Software Manual
for further details). Changes made here update
settings in the main window of the program.
Thermocouple Type
Select the appropriate thermocouple type from this menu. If ‘mV’ is
chosen then the raw millivolt signal will be shown. If any other selection
is made then the ice point corrected thermocouple signal will be shown
in units of mV corresponding to the emf values listed in the NIST ITS–90
thermocouple tables, see http://srdata.nist.gov/its90/main/.
Setting the Range
Use the Range pop-up menu to select the input range (sensitivity) of the
channel. Available ranges are shown in
Table 2–1
. Signals in excess of
the range value will be truncated.
Filtering
The low pass filter will remove high frequency noise. For most
thermocouple probes filter values of 1 – 10 Hz will be appropriate.
The Mains Filter,
, removes 50 or 60 Hz interference due to
mains hum. See the
Chart Software Manual
for more information. For
most applications it is recommended to have the Mains Filter on.
mV
Available ranges (°C) for various thermocouple types
B
E
J
K
N
R
S
T
±20
1820
290
360
485
585
1680
1760
250
±10
1500
150
180
250
320
960
1040
115
±5
1020
80
95
120
170
550
580
60
±2
630
35
40
50
75
260
265
30
Table 2–1
Ranges available for
different input settings.
Summary of Contents for Quad Tc/mV
Page 4: ...iv Quad Tc mV Amp ...
Page 8: ...4 Quad pH mV Amp ...
Page 18: ...14 Quad pH mV Amp ...
Page 22: ...18 Quad Tc mV Amp ...
