© Isothermal Technology
Page 61 of 102
923 milliK manual - issue: 1.10
readings, so if the zero readings fall outside the limits you should return your milliK to
Isotech for investigation.
5.2.1.2
SPRT Resistance Range (115
Ω
Ω
Ω
Ω
) – Span Check
Connect a calibrated (nominally) 100
Ω
resistor to channel 1 and set the milliK to read its
resistance on the 115
Ω
range at 1mA by changing the parameters in the ‘Settings’ Window
(see section 5.2.1.1 for details of settings). Press the
Numeric
(F2) key, clear the statistics
and wait for 100 measurements to be made (when the display shows “Mean of 100”). The
mean value indicated by the milliK should be compared with the calibrated value of the
resistor (apply a correction to the value of the resistor if its temperature coefficient of
resistance is significant). Repeat the procedure on Channel 2.
5.2.1.3
PRT Resistance Range (460
Ω
Ω
Ω
Ω
) – Span Check
Connect a calibrated (nominally) 400
Ω
resistor to channel 1 and set the milliK to read its
resistance on the 460
Ω
range at 1mA by changing the parameters in the ‘Settings’ Window:
Press the
Numeric
(F2) key, clear the statistics and wait for 100 measurements to be made
(when the display shows “Mean of 100”). The mean value indicated by the milliK should be
compared with the calibrated value of the resistor (apply a correction to the value of the
resistor if its temperature coefficient of resistance is significant). Repeat the procedure on
Channel 2.
5.2.2 Thermistor Resistance Range (500k
Ω
Ω
Ω
Ω
) – Span Check
Connect a calibrated (nominally) 500k
Ω
resistor to channel 1 and set the milliK to read its
resistance on the 500k
Ω
range by changing the parameters in the ‘Settings’ Window:
