To set channels 0 through 15 to measure temperature using 2,250 Ohm
thermistors (in this case paired to current source SCP channels 16 through 31):
OUTP:CURR:AMPL 488e-6,(@116:131)
Set excite current to 488
µ
A on current SCP channels 16 through 31.
SENS:FUNC:TEMP THER,2250,(@100:115)
Link channels 0 through 15 to temperature EU conversion for 2,250
Ω
thermistor.
To set channels 32 through 47 to measure temperature using 10,000 Ohm
thermistors (in this case paired to current source SCP channels 48 through 63):
OUTP:CURR:AMPL 30e-6,(@148:163)
Set excite current to 30
µ
A on current SCP channels 48 through 63.
SENS:FUNC:TEMP THER,10000,(@132:147)
Link channels 32 through 47 to temperature EU conversion for 10,000
Ω
thermistor.
To set channels 48 through 63 to measure temperature using 100 Ohm
RTDs with a TC of .00385 Ohm/Ohm/
°
C (in this case paired to current
source SCP channels 32 through 47):
OUTP:CURR:AMPL 488e-6,(@132:147)
Set excite current to 488
µ
A on current SCP channels 32 through 47.
SENS:FUNC:TEMP RTD,85,(@148:163)
Link channels 48 through 63 to temperature EU conversion for 100
Ω
RTDs
with .00385 TC.
Thermocouple
Measurements
Thermocouple measurements are voltage measurements that the EU
conversion changes into temperature readings based on the sub_type
parameter and latest reference temperature value. As mentioned in “ Setting
SCP Gains” on page 70, higher SCP channel gain provides quieter
measurements. However, it is possible to specify a channel gain high
enough to cause an A/D over-range reading for the highest temperature
ranges for some thermocouples.
•
For Thermocouples, the
<
sub_type
>
parameter can specify
CUSTom
,
E
,
EEXT
,
J
,
K
,
N
,
R
,
S,
T
(
CUSTom
is predefined as Type K, no
reference junction compensation.
EEXT
is the type E for extended
temperatures of 800
°
F or above).
To set channels 31 through 63 to measure temperature using type E
thermocouples, first measure or supply reference temperature for channels 31
through 63 (see below).
SENS:FUNC:TEMP TC,E,(@131:163)
76 Using the HP E1313/E1413
Chapter 3
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