This manual introduces the features, specifications, and operating instructions of the REED Instruments Model 8778 Heat Stress Meter.
The REED Instruments Model 8778 Heat Stress Meter is a handheld device designed to measure environmental heat stress. It calculates the Wet Bulb Globe Temperature (WBGT) by measuring air temperature, black globe temperature, and relative humidity. The meter features an adjustable audible alarm, auto power-off, and interfaces for data logging via RS232 or USB.
| Air Temp. Range | 0.0 to 50.0°C (32 to 122°F) |
|---|---|
| Air Temp. Accuracy | ±0.6°C (±1.1°F) |
| Black Globe Temp. Range | 0.0 to 80.0°C (32 to 176°F) |
| Humidity Range | 0 to 100% RH |
| Humidity Accuracy | ±3% RH: 10 to 90% RH, ±5% RH: rest of range |
| Power Supply | 2 x AAA batteries |
| Power Consumption | 1000 hours (Alkaline), 250 hours (General purpose) |
| Dimensions | 10 x 1.9 x 1.1” (254 x 49 x 30mm) |
The alarm threshold setting range is 20.0 – 37.2°C (68 - 99.0°F).
The meter automatically powers itself OFF after 20 minutes of inactivity.
The calibration process will finish in approximately 60 minutes.
The protocol is 9600 bps, 8 data bits, no parity.