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Specifications
Conformity Error
Cold-junction Compensation Error
Voltage Output Mode
Units
METER MODE
Voltage Input
Input Impedance
Pumpout Current
Protection
Accuracy
Resolution
Temperature
Voltage
Temperature Coefficient
Settling Time
SUPPORTED STANDARDS
Thermocouple Types
B, E, J, K, R, S, and T
N
C and D
G and PLII
Temperature Scales
GENERAL INSTRUMENT SPECIFICATIONS
Ac Operation
Line Voltage
Line Current
Dc Operation (for units with battery option installed)
Operation Time
Recharge Time
<0.4 µV.
<0.004°C/°C.
mV and V.
−11 V dc to +11 V dc.
>10 MΩ nominal.
<1 nA.
Same as Source Mode.
Same as Source Mode.
Selectable settings of 0.1° and 1° (0.1 and 1 if the unit of
measure is kelvin).
Selectable settings of 0.1 µV, 1 µV, 10 µV, 100 µV, and
1 mV. (1 µV is the maximum setting at ±1 V and higher).
Same as Source Mode.
<10 s to rated accuracy.
NIST Monograph 175 and Monograph 125.
NIST Monograph 175 and Monograph 161.
ASTM E230.
ASTM E1751.
ITS-90 and IPTS-68.
85 V ac to 250 V ac, 47 Hz to 63 Hz.
140 mA ac rms when battery pack is fully charged and less
than 1 A when the battery pack is being recharged.
More than six hours when the battery pack is fully charged.
Less than three hours to fully recharge from a fully
discharged state.
CAUTION
The battery pack used in the Model 1140A must be
charged at least once every two months. If this is
not done, the battery-pack voltage may decay
beyond its ability to recover.
2-2
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