XD-502 Digital Console
Apex Instruments, Inc.
Dry Gas Meter
Model SK25EX-100 multi-chamber positive displacement meter fitted with a quadrature encoder. Q for air 41
max
LPM at 150 Pa, Q 0.26 LPM, Resolution 0.002 Liter, cyclic volume 0.7 Liter, 400 pulses/revolution, accuracy
min
1.5% at volumes greater than 10 Liters. Type K thermocouple for meter exit temperature (optional Type K
thermocouple for meter inlet temperature)
Internal Sample Pump (Standard, Optional Without)
Dual head diaphragm, 70 LPM free flow, 21 LPM @ -50 kPa, max vacuum 27” Hg (-85 kPa), 24 VDC
brushless motor
Display
4x20 character backlit transflective liquid crystal display, 160x96 dot matrix, viewing area 74 mm x 45 mm,
operating temperature -20 to 70 °C (-4 to 158 °F)
Keypad
Display controlled by six button, long-life membrane keypad for display operation, tactile feedback keys
control the timer and menu operations, ability to zero the meter pressure differential (ΔH) and pitot tube
pressure (ΔP) transducers, DGM volume and reset the timer
Temperature Measurement
Cold junction compensated Type K thermocouple-to-digital converter °C/°F selectable, -200 to 1372 °C
range (-328 and 2502 °F), up to 6 additional Type K thermocouple inputs, standard size jacks
Temperature Controllers
Probe and Oven. Fuji PXR3 compact, 1/32 DIN self-tuning PID temperature controller with 3 button keypad,
SSR driver for 25A solid state relay, Type K thermocouple jack for input
Digital Pressure Transducers
High resolution, digital, factory calibrated and temperature compensated -20 to 70 °C, proof pressure 49 kPa
ΔP Low +/- 1.0” (+/-249 Pa) range bi-directional with 0.001” (0.1 Pa) resolution
ΔP High +/- 10.0” (+/-2491 Pa) range bi-directional with 0.01” (1 Pa) resolution
ΔH 5.0” (1245 Pa) range with 0.01” (1 Pa) resolution
Vacuum Measurement
PCB-mounted sensor, 0 to -30” Hg (0 to -100 kPa)
Umbilical Connection
Electrical multi-conductor circular connector, instrumental grade stainless steel quick connects
Sample inlet - 1/2”, pitot connections - 1/4”, Type K thermocouple plugs - AUX, STACK, PROBE, OVEN, EXIT
Processor
Apex Instruments PIC32 Microcontroller Module
Firmware
Scaling factor gamma correction input, pressure sensor damping, temperature sensor offset, user-
selectable unit types (Metric, Metric Pa, Imperial)
Power
Supply 120VAC/60Hz 15 amps max. or 240VAC/50Hz 10 amps max., IEC C-14 Inlet
Dimensions and Weight:
H17” x W17” x D12” (43 cm x 43 cm x 30.5 cm), base configuration37.5 lbs (17 kg)
2.4 Technical Specifications
16
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