1.
Connect a 0
Ω
resistor to the input and measure its resistance. If a short-
ing wire is used, the wire should run from the inside black terminal to
the inside red terminal to the outside red terminal then back across to the
outside black terminal. Note the average error in the measurement. Ad-
just the 0_ADJ parameter by subtracting the measured error. For exam-
ple, if the input is exactly 0.0
Ω
and readout shows -0.11
Ω
, 0_ADJ
should be adjusted by adding 0.11 to it.
2.
Connect a 10 k
Ω
resistor (12 ppm accuracy) to the input and measure its
resistance. Note the average error in the measurement. Adjust the
10K_ADJ
parameter by subtracting the measured error. For example, if
the input is exactly 10.00000 k
Ω
and the readout shows 10.00295 k
Ω
,
10K_ADJ
should be adjusted by subtracting 2.95 from it.
3
Connect a 100 k
Ω
resistor (12 ppm accuracy) to the input and measure
its resistance. Note the average error in the measurement. Adjust the
100K_ADJ
parameter by subtracting the measured error. For example, if
the input is exactly 100.0000 k
Ω
and the readout shows 99.9913 k
Ω
,
100K_ADJ
should be adjusted by adding 8.7 to it.
4.
Record the date with the calibration date parameter.
5.
Verify the accuracy at 0
Ω
, 4k
Ω
, 10k
Ω
, 40k
Ω
, 100k
Ω
, and 1M
Ω
on both
channels. Verify the accuracy of both channels with selected resistances.
The accuracy must be within the short-term accuracy given in the
specifications.
1560 Thermometer Readout
User’s Guide
138
