HygroTwin

HygroTwin 2850
Trace Moisture, Relative Humidity, Pressure and Oxygen Analyzer

The HygroTwin 2850 Analyzer System combines powerful features and maximum flexibility for accurate moisture analysis in a variety of process control applications. The instrument incorporates two input channels for moisture, two input channels for temperature, and two additional inputs for trace oxygen, pressure, or other sensors.

The HygroTwin 2850 uses interchangeable probes to measure dew point temperatures in gases and non-conductive liquids from –110°C to +20°C (-166°F to +68°F) or 1 ppbv to +20°C (68°F), relative humidity from 0-100% or dew point range from <-15°C to +85°C (<5°F to +185°F). The analyzer receives the moisture and temperature frequency signals from the probes and calculates the engineering units from a calibration table in the probes’ memory. Thirty-one individual units of measure may be selected to indicate dew point, concentration, water vapor pressure, mixing ratio, absolute humidity, relative humidity, oxygen concentration and temperature. The HygroTwin can calculate change in moisture between two measurement points and express it in terms of absolute humidity or concentration units in lbs/MMSCF. This is useful in monitoring drying processes.

Features:

	Accepts two humidity inputs
	Operates with trace moisture and relative humidity probes, ranging from -110°C to +85°C.
	Wide selection of engineering units with simple set-up and automatic reprogramming
	Analog and digital outputs to interface with external control devices
	In-line or bypass mounting, with one or two point continuous or multi-point spot checking capability

原廠目錄下載 (PDF Format, 1 pages, 71 KB.)
HygroTwin 2850 Trace Moisture, RH, Pressure and Oxygen Analyzer

SPECIFICATIONS

Electronics: Continuous, self-checking, microprocessor controlled, updating measured value every 2 seconds

Accuracy: ± 0.2%

Instrument Range: -130°C to +100°C (-202°F to +212°F) dew point, 1 ppbv to 10-6 ppbv, 0 to 45,000 lbs/MMSCF, 7x10-8 to 760 mmH g, 0 to 100%

Inputs: 2 each moisture, 2 each temperature, both accepting the probe frequency signals of 0 to 10,000 Hz typical, 2 each optional inputs, accepting 0 to 10,000 Hz, 1 to 5 VDC, or 4 to 20 mA

Outputs: 4 each isolated, linear analog 4 to 20 mA into 500 ohms load, 0/1 to 5 V, load >10 kohms, user-assigned channel, unit, and span; 4 each alarm relays, SPDT, rating 250 V AC, 2.5 A, user-assigned channel, unit, and set point; 1 each RS-232-C port, baud rate 110, 300, 1200, 2400, 4800, 9600, data bits 7 or 8, parity odd, even or none; 2 each power supply for optional sensor 12/24 V DC, 50 mA

Cable Connections: NASA-approved push-in terminals

Program: Non-volatile memory

Data: EEPROM

EMI/RFI/ESD Resistance: Exceeds IEC 801.2, ANSI C63, IEC 801.4, ANSI/IEEE C62.41; and IEC 801.5, ANSI/IEEE C62.41 standards

Moisture Units: Dew Point (°C or °F); Relative Humidity (%); Concentration (ppmv, ppbv, vol %, mol %, lb/MMSCF; Concentration (liquid) (ppmw) – ppmw; Concentration (gas) – ppmw; Mixing Ratio (g/kg, lb/lb, gr/lb); Absolute Humidity (gr/ft³, g/m³); Vapor Pressure (mmHg, mbar)); Difference Process Temp, and Dew Point (change in °C, change in °F); Difference A&B in Mixing Ratio (g/kg, gr/lb); Difference A&B in Absolute Humidity (g/m³, gr/cf); Temperature Units (°C, °F)

Eng. Units: Independently assignable to display, outputs, and alarms

Optional Input Units: Pressure with correction (P in psig, inches of water column, bar or Torr); Oxygen (OX in ppmv or % by volume)

Instrument Set-up: By 3 push-buttons and 4 programming levels: Units, constants, and calibration data; outputs, alarms, and hardware set-up; RS-232C, time and date, and listing of calibration tables: special functions.

Display: 2 line, 80 character back lit LCD displays moisture, temperature, and additional inputs simultaneously

Operating & Storage Temp.: 0° to 50°C

Power: 115 V AC, 50/60 Hz, 25 Watts(; 200 V AC, 12 V DC, 48 V DC,
24 V DC, optional; +15/-10 10% for 115 V AC

Battery Power: For Model 2850-6 12 V DC, 5 to 6 hour operation, built-in recharger (optional)

Weight: 19” Rack Mount: 3.15 kg (7 lbs) Model 2850-3 Panel Mount: 2.7 kg (6 lbs) Model 2850-4 NEMA 4X: 5.85 kg (13 lbs) Model 2850-5 Portable/Bench Top: 5.4 kg (12 lbs), 14 lbs with battery Model 2850-6 NEMA 3/4/7/9: 44.1 kg (98 lbs) Model 2850-7

Enclosures: Height Width Depth
19” Rack Mount: 5.25” 19” 11”
Panel Mount: 5.25” 10” 11”
Panel Cutout: 4.75” 8.625”
NEMA 4X: 13.3” 11.3” 5.6”
Portable/Bench Top: 5.75” 11.5” 13.5” NEMA 3/4/7/9, Cl.1, Div.1&2, Gr. B, C, D 18” 18” 7”

Probes: Relative Humidity (Silicon-based polymer capacitive) and Trace Moisture Probes (Gold/Aluminum Oxide Capacitance) available.

Ordering Information Analyzer 2550
1 2 3 4

1 Certification
O Standard configuration (no approvals)
CG CSA General Purpose Approved

2 Analyzer Without Probe
1 No enclosure
4 Panel mount
5 NEMA 4X/CSA Type 3 with 4 cable glands (Fig. 3)
7 NEMA 3/4/7/9, Class I, Div. 1 & 2, Groups B, C, & D
8 Panel mount with door (Fig. 4)

3 Alarm
D 2 Alarm relays, 250 V AC, 2.5 A, both assigned to moisture
(programmable set points)

4 Power
0 115 V AC, 50/60 Hz
1 220 V AC, 50/60 Hz
2 24 V DC

Ordering Information Moisture Probe DY – 5
1 2 25 3 5

1 Mounting Adapter
0 None
2 1/2” MNPT X 1/2” tube, 316 SS compression fitting
3 1/2” MNPT X 1/2” tube 316 SS compression fitting
4 1/2” X 16 “O” ring X 1/2” tube 316 SS compression fitting
6 SS – 8 - VCR( - 3 gland with female nut SS – 8 - VCR( - 1 welded to the probe tube, includes gasket/retainer assay

2 Probe Structure
1 Replacement moisture probe for explosion-proof probes: 1/2” diameter 5” long 316 SS probe with 1/2” MNPT welded on for junction box mounting

2 Moisture probe mounted to an explosion-proof junction box for hazardous areas Class I, Div. 1 & 2, Group C & D, overall length 10” (Specify on order if for Group B)
7 Probe with 8-pin cable connector, overall length 7.8”

3 Protective Sensor Cap
D Standard end cap
S Sintered stainless, 100(m (use with high flow, particulates and dryers)

5 Certification
0 None
C1 Designed for Class I, Div. 1, Gr. B, C, D when used with intrinsic safety barriers
C2 Designed for use in Class I, Div. 2, Gr. B, C & D areas
CX Explosion-proof with flame arrestor-equipped flow cell for Class I, Div. 1, Gr. C & D

Ordering Information Interconnecting Cable

1 /2550 2

1 7 Multi-pin connector and tinned ends (use with probe DY-5_7 25)
2 Spade lugs and tinned ends (use with probe DY-5_2 25)

2 Cable Length
O 5 ft. long
L Other length (specify required length up to 1000 ft.)