Operation manual here :

http://literature.cdn.keysight.com/litweb/pdf/04338-90040.pdf

HP 4338B MilliOhmmeter

            Measurement conditions and functions

Test frequency: 1 kHz ± 0.1%

AC test signal level (rms current): 1 μA, 10 μA, 100 μA, 1 mA, 10 mA

Maximum applied AC voltage: 20 mV peak

Maximum DC voltage to BNC terminals: 42 V

Ranging: Auto and hold

Maximum cable length: 2 meters

Trigger: Internal, manual, and external

Delay time: 0 to 9999 ms in 1-ms steps

Averaging: 1 to 256

Measurement time (typical):
Short Medium Long
34 ms 70 ms 900 ms

            Other instrument functions

Math functions: Deviation (Δ) and percent deviation (%Δ).

Short error correction:
Eliminates measurement errors due to parasitic impedances in cables and test fixtures.

Comparator: HIGH, IN, and LOW for primary and secondary parameters.

Continuous memory: All instrument settings are automatically saved for up to 72 hours when power is lost or the instrument is turned off.

Save/recall: 10 instrument states from non-volatile memory.

Contact check: Detects contact failure.

GPIB: Implementation of IEEE-488 for control and data.

Handler interface:

Negative logic and optically isolated; output signals: HIGH/IN/LOW, end-of-measurement, index, and alarm; input signals are keylock and external trigger.

             Physical characteristics

Power: 90-132 Vac or 198-264 Vac. 47-66 Hz. 45 VA typical.
Operating temperature: 0 °C to 45 °C
Dimensions: 320(W) x 100(H) x 300(D) mm
Weight: 4.5 kg