Model 4500 Automated Low
The Model 4500 automated low humidity generating system is based on the fundamental, NIST proven, “two temperature” and “two pressure” principles. This system is capable of continuously supplying extremely accurate humidity values for instrument calibration and evaluation. When used within the specified frost/dew point range of -95 °C to 10 °C, this system will automatically generate multipoint profiles as well as manually entered setpoints for days or even weeks.
Virtually all functions of the 4500 humidity generator are controlled automatically. All desired humidities, temperatures, test pressures, and time intervals may be programmed. Visual indications of system status are displayed in real time on the computer monitor.
Product Description
Specification
Delivery:
Humidity Generator
Main Features
•Traceable to NIST
•Accuracy ± 0.1 °C Frost Point
•Two-Pressure Two-Temperature Principle
•* ControLog™ Automation Software
•Computerized Internal Transducer Calibration
•Automatically Applies Enhancement Factors
•Computes System Uncertainties in Real Time
Environmental
| Operating Temperature |
15 to 30°C |
| Storage Temperature |
0 to 50°C |
| Humidity |
5 to 95% Non-condensing |
| Frost Point Accuracy |
±0.1°C |
| Frost Point / Dew Point Range |
-95 to +10°C |
| Frost Point Resolution |
0.001°C |
| Parts
Per Million Range |
0.04 to 12000 PPMv |
| Saturation Pressure Range |
15 to 30 psiA |
| Saturation Pressure Accuracy (10-45
psiA) |
±0.0045 |
| Saturation Pressure Accuracy (30-300 psiA) |
±0.030 |
| Saturation Pressure Resolution (10-45 psiA) |
0.001 |
| Saturation
Pressure Resolution (30-300 psiA) |
0 . 0 1 |
| Saturation Temperature Range |
-80 to +15°C |
| Saturation Temperature Accuracy |
±0.05°C |
| Saturation
Temperature Resolution |
0.001°C |
| Saturation Temperature Heating/Cooling Rate |
2 Minutes Per °C Average |
| Chamber
Pressure Range |
Ambient to 30 psiA |
| Chamber Pressure Accuracy |
±0.003 psiA |
| Chamber Pressure Resolution |
0.001
psiA |
| Chamber Temperature Range |
-10 to 85°C |
| Chamber Temperature Range: (Optional)* |
-80 to +20°C |
| Chamber Temperature
Accuracy |
±0.05°C |
| Chamber Temperature Resolution |
0.001°C |
| Chamber Fluid Heating/Cooling Rate |
2 Minutes Per
°C Average |
| Chamber Dimensions |
8" x 8" x 8"
(203 mm x 203 mm x 203 mm)
|
| Generation Gas Flow Rate Range |
0.1 to 5 slpm |
| Physical Dimensions |
40" x 36" x 71"
(1.02 m x 0.91 m
x 1.8 m)
|
| Electrical Power |
200/240 V~, 13 A, 50/60 Hz |
| Gas Supply |
350 psiG, 5 l/m, with ambient
pressure frost point
<-80°C |
| Cooling Water |
1 gpm (4 l/m) Maximum @ 21°C |
Utilities
Simply apply power to the system, and the computer will load the controller with power-up and generation routines. A menu of options will appear, manual or automated control is selected, humidity and temperature setpoints are entered, or a profile is selected and generation begins. Humidity and temperature setpoints and profiles are limited only by the physical response time and range of the 4500 humidity generator.
Automated features of the 4500 allow the generator to perform humidity and temperature profiles completely unattended, while continuously recording and printing system data. This frees the operating technician from the task of system monitoring and adjustment. Upon completion of a profile, the system will adjust to a pre-selected humidity value and await a new instrument load or shutdown.
