OptiCal
Relative Humidity and Temperature Generator with built-in Chilled Mirror Reference
The OptiCal is a bench-top, fully self-contained humidity/temperature calibrator. The system comprises a humidity and temperature controlled chamber that can house up to fi ve or more humidity sensors, depending on their physical dimensions. The humidity and temperature within the chamber are closed-loop controlled and continuously monitored by a precision chilled mirror reference hygrometer. The OptiCal works by time-proportioning the fl ows of dry and saturated air according to the pre-selected relative humidity value. The chamber temperature is controlled by a four-zone Peltier heat pump arrangement for maximum stability and minimum temperature gradient. The saturator assembly can be fi lled
easily with the distilled water reservoir at the front of the unit and the easily accessible desiccator can be re-charged by heating when required. No other maintenance is necessary.
The only external service required is a single phase power supply.
Applications
Calibration – Certification –
OptiCal |
|
| Reference Hygrometer | |
| Type | Optidew chilled mirror dew-point transmitter |
| Humidity | |
| Generator range | 10–90% RH |
| Accuracy Control element | ±1% RH (10.70% RH) ±1.5% RH (70.90% RH) |
| Stability | ±0.2% RH (20–80% RH) |
| Temperature | |
| Generator range | +10 to +50°C (+50 to +122°F)
(lowest T set point = 10ºC (18°F) below ambient) |
| Accuracy | ±0.1°C (±0.2°F) |
| Stability | ±0.1°C (±0.2°F) |
| Chamber | |
| Ramp rate from +20 to +40°C (+68 to +104°F) +40 to +20°C (+104 to +68°F) |
1.5°C / minute (2.7°F / minute) 0.7°C / minute (1.2°F / minute) |
| Control element | Removable relative humidity sensor |
| General | |
| Probe ports | up to 5 – sensor body diameters 5–25mm (0.2 to 0.98”) accommodated by port adapters |
| Chamber volume | 2000 cm3 (122.1in3) |
| Chamber dimensions | 105 x 105 x 160mm (4.13 x 4.13 x 6.3”) (wxhxd) |
| Instrument dimensions | 520 x 290 x 420mm (20.5 x 11.4 x 16.5”) (wxhxd) |
| Set point resolution | 0.1 for humidity and temperature |
| Displays | High definition 2 lines alpha numeric |
| Measurement units | ºC, ºCdp, % RH |
| Displays | g/kg, g/m3, (t-td), aw |
| Outputs Analog Digital Alarm |
Two channels 4-20 mA or 0-20 mA RS232 (RS485 optional) Volt free contact, 2A @ 30 V DC |
| Supply | 85–264 V AC, 47–63 Hz, 150 VA |
| Weight | 20kg |
- Overview
-
OptiCal
Relative Humidity and Temperature Generator with built-in Chilled Mirror Reference
The OptiCal is a bench-top, fully self-contained humidity/temperature calibrator. The system comprises a humidity and temperature controlled chamber that can house up to fi ve or more humidity sensors, depending on their physical dimensions. The humidity and temperature within the chamber are closed-loop controlled and continuously monitored by a precision chilled mirror reference hygrometer. The OptiCal works by time-proportioning the fl ows of dry and saturated air according to the pre-selected relative humidity value. The chamber temperature is controlled by a four-zone Peltier heat pump arrangement for maximum stability and minimum temperature gradient. The saturator assembly can be fi lled
easily with the distilled water reservoir at the front of the unit and the easily accessible desiccator can be re-charged by heating when required. No other maintenance is necessary.
The only external service required is a single phase power supply.Applications
Calibration – Certification –
- Technical Specifications
-
OptiCal
Reference Hygrometer Type Optidew chilled mirror dew-point transmitter Humidity Generator range 10–90% RH Accuracy Control element ±1% RH (10.70% RH)
±1.5% RH (70.90% RH)Stability ±0.2% RH (20–80% RH) Temperature Generator range +10 to +50°C (+50 to +122°F) (lowest T set point = 10ºC (18°F) below ambient)
Accuracy ±0.1°C (±0.2°F) Stability ±0.1°C (±0.2°F) Chamber Ramp rate from
+20 to +40°C (+68 to +104°F)
+40 to +20°C (+104 to +68°F)1.5°C / minute (2.7°F / minute)
0.7°C / minute (1.2°F / minute)Control element Removable relative humidity sensor General Probe ports up to 5 – sensor body diameters 5–25mm (0.2 to 0.98”) accommodated by port
adaptersChamber volume 2000 cm3 (122.1in3) Chamber dimensions 105 x 105 x 160mm (4.13 x 4.13 x 6.3”) (wxhxd) Instrument dimensions 520 x 290 x 420mm (20.5 x 11.4 x 16.5”) (wxhxd) Set point resolution 0.1 for humidity and temperature Displays High definition 2 lines alpha numeric Measurement units ºC, ºCdp, % RH Displays g/kg, g/m3, (t-td), aw Outputs
Analog
Digital
AlarmTwo channels 4-20 mA or 0-20 mA
RS232 (RS485 optional)
Volt free contact, 2A @ 30 V DCSupply 85–264 V AC, 47–63 Hz, 150 VA Weight 20kg - Downloads
