Iec751; Cvd; Ysi-400 - Fluke Hart Scientific 1522 User Manual

Coefficients
R(.01)
a
b
c
d
a4
b4
7.9.10

IEC751

The IEC751 probe type is for standard PRTs (RTDs) conforming to the IEC751
or DIN-43760 standards. This type of probe is generally low cost and has a
wide operating range (–180°C to 420°C or higher), but has limited accuracy
(0.15°C to 4°C). There are no user programmable coefficients associated with
this probe type. Temperature is converted from resistance based upon the stan-
dard PRT table resident in the instrument.
7.9.11

CVD

The CVD (Callendar-Van Dusen) type is used with PRTs that have unique cali-
bration coefficients or do not match the IEC-751 specification. This type of
probe is generally low cost, has a wide operating range (–180°C to 420°C or
higher), and has moderate accuracy (0.05°C to 1°C). This type uses the
Callendar-Van Dusen equation to calculate temperature from resistance:
r t C ( [
The coefficients R0, , , and
"R0", "Alpha", "Delta", and "Beta" respectively. When editing "Alpha" there is
an assumed 10
7.9.12

YSI-400

The YSI-400 type is for 2252 thermistors matching the characteristics of the
YSI-400 series of thermistors. This type of probe generally is low cost, has a
limited operating range (–40°C to 150°C), good accuracy (0.1°C to 0.4°C), and
excellent resolution (0.002°C). There are no user programmable coefficients as-
sociated with this probe type. Temperature is converted from resistance based
upon a standard YSI-400 table resident in the instrument.
Certificate Value
R(273.16K)
a5
b5
0.0
0.0
a5
b5
1
R 1 t
0
100 100
])
t
R 1 t
0
100 100
–3
exponent (i.e. 3.8500 is actually 0.0038500).
t
1
t t
1 1
100 100
can be set by the user using the functions
7 Display Functions
CAL MODE
t 0
3
t
t 0
43