Accuracy

±1% of full scale under calibration conditions including linearity over 59°F to 77°F (15°C to 25°C) and 10 to 60 psia (0.7 to 4 bara); +/- 2% of full scale including linearity under calibration conditions over 32°F to 122°F (0°C to 50°C) and 5 to 150 psia (0.3 to 10 bara); +/- 1% of full scale accuracy at a specific temperature and pressure is available with special calibration.

Repeatability

Temperature Coefficient

0.08% of full scale per °F (0.15% of full scale per °C), or better

840 (low, med). . . . . . 300 ms time constant;
2 second (typical) to within +/-2% of set point over 20 to 100% of full scale
840 (high). . . . . . . . . . 600 ms time constant;
4 seconds (typical) to within +/-2% of set point over 20 to 100% of full scale

Gases

0 to 10 sccm to 0 to 500 slpm; flow ranges specified are for an equivalent flow of nitrogen at 760 mm Hg and 21°C (70°F); other ranges in other units are available (e.g., scfh or nm³/h)

Gas Pressure

500 psig (34 barg) maximum;
30 psig (2 barg) optimum

Output Signal

Linear 0 to 5 VDC, 1000 ohms minimum load resistance
Linear 4 to 20mA, 500 ohms maximum loop resistance

Accuracy

±1.5% of full scale under calibration conditions including linearity over 60° to 80°F (15° to 26°C) and 5 to 60 psia (0.3 to 4 bara) If the instrument is mounted with a vertical (up or down) flow path the following accuracy de-rating applies:

Repeatability

±0.25% of full scale

Temperature Coefficient

0.08% of full scale per °F (0.15% of full scale per °C), or better

Response Time

800 ms time constant; six seconds (typical) to within

Gases

Most gases (e.g., air, nitrogen, carbon dioxide, argon, methane,
hydrogen, helium); check compatibility with wetted materials; specify when ordering. ±2% of final value over 25 to 100% of full scale

Pressure Coefficient

0.01% of full scale per psi (0.15% of full scale per bar), or better

Mass Flow Rates

0 to 10 sccm to 0 to 50 slpm; flow ranges specified are for an equivalent flow of nitrogen at 760 mm Hg and 21°C (70°F); other ranges in other units are available (e.g., scfh or nm³/h)

Gas Pressure

150 psig (10 barg) maximum
20 psig (1.4 barg) optimum

Display

Linear 0 to 5 VDC, 2000 ohms minimum load resistance
Linear 4 to 20 mA, 1000 ohms maximum loop resistance for 24 VDC supply

Accuracy

Standard: ±1.0% of full scale including linearity under calibration conditions (±2.0% of full scale for 180M from 201 to 300 slpm)

High Accuracy Calibration: ±0.5% of reading + 0.3% of full scale at calibration conditions

Dial-A-Gas

±0.2% of full scale

Temperature Coefficient

±0.01% of full scale per psi (0.15% of full scale per bar), or better

Response Time

300 millisecond time constant; 2 seconds typical to within ±2% of final value (includes settling time). Faster or slower available upon request.

Mass Flow Rates

180M Medium Flow Size: 0-10 to 0-200 slpm full scale
180H High Flow Size: 0-100 to 0-1000 slpm full scale
Flow range specified is for an equivalent flow of nitrogen at
760 mm Hg and 21°C (70°F); other ranges in other units are available
(e.g., nlpm, scfh, NM³/H, kg/H)

Gas Pressure

500 psig (34.5 barg) maximum, burst tested to 750 psig (52 barg)

Gas & Ambient
Temperature

Gas: 32°F to 122°F (0°C to 50°C)
Ambient: -5 to 122°F (-20 to 50°C)

Leak Integrity

5 X 10^-9 atm. cc/sec of helium maximum
Power Requirements (ripple should not exceed 100 mV peakto-peak) For All Mass Flow Meters: 15-24 VDC ±10%, (130 mA, regulated).

For Mass Flow Controllers:
C180M: 24 VDC ±10%, (700 mA, regulated)
C180H: 24 VDC ±10%, (1260 mA, regulated)

Control Range For Controllers

2 to 100% of full scale flow; automatic shut-off at 1.9 %

Output Signal

Analog:
Linear 4 to 20 mA, 500 ohms maximum loop resistance
and one of the following (user selectable):
Linear 0 to 5 VDC, 1000 ohms minimum load resistance
Linear 0 to 10 VDC, 1000 ohms minimum load resistance
Linear 1 to 5 VDC, 1000 ohms minimum load resistance

Digital:
RS-232
Modbus RTU

Outputs
(when connected to
Sierra 100 Series instruments)

• 2 Digital Outputs (can be linked to an alarm). These digital outputs can be replaced by 2 analog relays if the CM-Relays option is ordered.

• Analog Pulse Output—pulse every time totalizer counts; pulse width adjustable from 2.5 to 500 msec

Inputs
(when connected to
Sierra 100 Series instruments)

• RS-485 MODBUS RTU, optically isolated

• 2 Analog Inputs (user configurable for voltage 0-10V or current 0-20 mA). If Pulse Output option is selected, then only 1 analog input is available

Maximum Baud Rate

24 VDC; Compod requires 100 mA minimum above the power required by the connected 100 Series instrument. The Compod can be powered from the

Sierra 100 Series instrument where it is mounted or it can be powered directly and it will provide power to the Sierra 100 Series instrument.

Accuracy

± 0.2% of full scale

Temperature Coefficient

0.025% of full scale per °F (0. 05% of full scale per °C), or better

Pressure Coefficient

2 seconds (typical) to within ± 2% of final value (includes settling time),
faster or slower available upon request (controllers only).

Gases

Measures and controls all clean gases including corrosives and toxics;
specify when ordering.

The following ten gases make up the Dial-A-Gas® feature of every SmartTrak instrument; up to nine alternate gases may be substituted.

Gas and Ambient Temperature

32 to 122°F (0 to 50°C)

Gas Pressure

5000 psig (333 barg) maximum, burst tested to 7500 psig (500 barg)

Leak Integrity

Analog:
Linear 4–20 mA, 500 ohms maximum loop resistance
and one of the following (user selectable):
Linear 0–5 VDC, 1000 ohms minimum load resistance
Linear 0-10 VDC, 1000 ohms minimum load resistance
Linear 1-5 VDC, 1000 ohms minimum load resistance

Accuracy

±0.25% of full scale

Temperature Coefficient

0.01% of full scale per psi (0.15% of full scale per bar), or better

Response Time

300 ms time constant; two seconds (typical) to within ±2% of final value including setting time. May be tuned to be faster or slower (consult factory)

Gases

The 50 Series can be calibrated for any gas compatible with viton, aluminum and stainless steel, using any units, to either normal or standard conditions, for flow rates up to 50 slpm air equivalent. Standard calibrations are available for ranges (slpm air equivalent) from 20 sccm/nccm to 50 slpm/nlpm. For measuring or controlling flows below 5 sccm, please consider Micro-Trak™ Model 101. Above 50 slpm, please consider the SmartTrak® 100 Series

Gas Pressure

15 to 20 psi (1.0 to 1.3 bar) see table

Gas and Ambient Temperature

5 X 10^-9 atm cc/sec of helium maximum

Power Requirements

24 VDC (±10%), 315 mA, regulated, RS-485 option adds 130 mA