SPECIFICATIONS TIME BASE Internal clock reference: 11.059 MHz crystal oscillator Nominal gate time: Programmable from 0.00 s to 99.99 s in 10 ms steps Calibration accuracy at 25°C: ±2 ppm Temperature stability, 0-60°C: ±50 ppm over entire range Long-term drift: ±2 ppm/month Fine-calibration method: External standard and correction multiplier SIGNAL CONDITIONERS 0. TTL-LEVEL PULSE INPUT (STD) Common Specs Threshold: 0.8 V LO, 2.0 V HI Frequency ranges: 0-3 kHz, 0-100 kHz, 0-7 MHz Protection level: 20 to +25 V in 3 kHz & 100 kHz ranges Trigger slope: + or (programmable) TTL-level logic input Connection: 2-wire Form-C contact-closure Connection: 3-wires plus external 20 k resistor Debounce: Internal flip-flop NPN or PNP open-collector Connection: 3-wire Sensor excitation: +5 V 1 & 2. ISOLATED PULSE INPUT WITH EXCITATION (OPT) Voltage input & passive magnetic pickup Maximum signal: 260 V rms Sensitivity (square-wave input): ±10 mV, 0 to 1 kHz; ±25 mV at 20 kHz; ±50 mV at 100 kHz Input impedance: 1 M, signal < ±500 mV > 70 k, signal > ±500 mV Hysteresis: 12, 70, 700 mV (jumper-selectable) NPN or PNP open-collector input Connection: 3-wire Sensor excitation output: 12.4 V at 20 mA Internal load (jumper-selectable): 1 k pull-up resistor to +8.2 V (NPN mode) / 3 k pull-down resistor to EXC LO (PNP mode) Switching threshold: 4.2 to 8.2 V (adjustable) NAMUR input Connection: 2-wire Sensor excitation output: 8.2 V Internal load/source impedance: 1 k Activated: < 1 mA Deactivated: > 3 mA Contact-closure input Connection: 2-wire Sensor excitation output: 6.2 V, 1M source Switching threshold: 0 to +2.0 V (adjustable) Debounce time: 0, 1, 22, 120 ms (jumper-selectable) Minimum OFF period: 8 or 100 ms (jumper-selectable) Common specs, all input types Number of channels: 1 or 2 Common-mode voltage (CMV): 350 Vp Frequency range: DC input: 0 to 100 kHz and AC-coupled input: 2 Hz to 100 kHz Low-pass filter: 65 Hz, 1 kHz, 100 kHz (jumper-selectable) Trigger slope: + or (programmable) 3. NON-ISOLATED PULSE INPUT W/EXCITATION (OPT) Common specs Number of channels: 1 Frequency response: 10 kHz Voltage input & passive magnetic pickup Minimum signal, valley to crest: 0 to 120 mV Maximum signal: 60 V rms Input impedance: 160 kOhm NPN open-collector input Connection: 3-wire Sensor excitation output: 16 V at 25 mA or 20 V at 16 mA (jumper-selectable) Internal load: 7.5 k pull-up resistor to +5 V dc NAMUR input Connection: 2-wire Sensor excitation output: 8.2 V Internal load/source impedance: 1 k Activated: < 1 mA Deactivated: > 3 mA Contact-closure input Connection: 2-wire Debounce time: 15 µs, 10 ms or 80 ms (jumper-selectable) 4. ANALOG INPUT (OPT) Number of channels: 1 Isolation, SIG GND to DIG GND: 350 Vp Signal range: 0-1 mA, 4-20 mA, 0-5 V, 1-5 V, 0-10 V dc (jumper-selectable) Output to main meter: 1 Hz to 10 kHz Low-level shutoff: Jumper selection to disable output below 10 Hz, 50 Hz or 260 Hz Zero offset adjustment: ±5% of full scale via potentiometer Non-linearity, max: ±.02% of full scale Accuracy at 25°C: 99.95% of reading Tempco of span: ±0.005% of reading/°C (50 ppm/°C) in 4-20 mA range Tempco offset: 0.1 count/°C  
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