Side- and end-viewing probes accommodate various mounting requirements. Specialty high-resolution probes allow the 244A to resolve spot diameters as small as 1 mm. Probes include air purge capability to prevent ingress of particulate.

Range:                         ±3000 volts, auto polarity.

Accuracy:*                  0.1%, ±0.003%/°C over +20 to +40°C range (at recorder output). Useable to +50°C.

Speed of response:*

For typical input step: <3ms (10% to 90%)

for 1kV step: <2½ms (10% to 90%)

for 2kV step: <3½ms (10% to 90%)

for 3kV step: <4ms (10% to 90%)

Settling time:              <3½ms to 1% of 1kV step input.

Frequency response:   Small signal frequency response typically ±3db to >300Hz.

Drift:*                          <0.01V/hr after 1 hr warm-up (0.003V/hr typical). Not measurably affected by 10°C temperature variation or changes between 10% and 90% relative humidity.

Noise:*                        <0.3V rms or 2 volts peak-to-peak wide band (bandwidth restricted to<1kHz) referred to input.

Surface resolution:     Determined by probe aperture size and surface-probe separation. Standard type 1017AE & AS probes with 0.07” (1.75mm) aperture will resolve a 0.10” (2.5mm) spot at 0.02” (0.5mm) separation.

Recorder output:        Compressed analog output is input divided by 1000 (optional Model 244AK has divide by 200) for external loads greater than 1KΩ. Output connector is BNC.

Output filter:              Bessel low pass filter with 0.7ms constant delay.

Size:                           4 x 8½ x 14 inches (10 x 21.8 x 35.6 cm), 1.75” rack mounting available (1 or 2 per rack).

Weight:                      7 lb. (3.2 kg)

Power requirement:   100, 115, 230 VAC, ±10%, 50/60Hz, 15 watts.

Accessories Included:     Manual on CD, line cord, phono plug

• Electrophotographic measurements
• Radiation effect studies
• Electret research
• Electric field studies
• Process monitoring and control
• Integrated circuit manufacturing and handling