Key facts
- Brand
- Reed Instruments
- Model
- Model 8778
- Category
- Health Care
- Documents
- 4
- Languages
- EN
- Last added
- 2023-10-19
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REED Instruments Model 8778 Heat Stress Meter Instruction Manual
This manual provides step-by-step instructions for operating the Model 8778 Heat Stress Meter, including selecting display modes, setting alarms, and calibrating humidity. It also covers troubleshooting common issues and replacing batteries. The device measures WBGT, black globe temperature, air temperature, and humidity with adjustable units and alarm thresholds.
The meter features an RS232 interface for data logging and includes optional accessories like a tripod and calibration standards. It automatically powers off after 20 minutes of inactivity and can be overridden. Calibration is performed using 33% and 75% humidity standards, with detailed steps provided.
REED Instruments Model 8778 specifications
| Air Temperature Range | 0.0 to 50.0°C (32 to 122°F) |
|---|---|
| Air Temperature Accuracy | ±0.6°C (±1.1°F) |
| Black Globe Temperature Range | 0.0 to 80.0°C (32 to 176°F) |
| Black Globe Temperature Accuracy | ±1°C: 15 to 40°C, ±1.5°C: rest of range for indoor; ±1.5°C: 15 to 40°C, ±2°C: rest of range for outdoor |
| 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 (included) |
| Dimensions | 10 x 1.9 x 1.1” (254 x 49 x 30mm) |
| Black Ball Dimensions | 2.95 x 2.95” (75 x 75mm) |
Source: REED Instruments Model 8778 Heat Stress Meter Instruction Manual
All REED Instruments Model 8778 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I switch between indoor and outdoor modes?
Hold down the IN/OUT switch for more than 1 second to toggle between IN (indoor, no sun) and OUT (outdoor, full sun) modes.
From: REED Instruments Model 8778 Heat Stress Meter Instruction Manual
How do I set the alarm threshold?
When the meter is OFF, hold down the button for 2 seconds to enter alarm setting. Press the button to increment the value, and press the button for 2 seconds to return to measuring mode. The setting range is 20.0 – 37.2°C (68 - 99.0°F).
From: REED Instruments Model 8778 Heat Stress Meter Instruction Manual
What is the alarm threshold range?
The alarm threshold setting range is 20.0 – 37.2°C (68 - 99.0°F).
From: REED Instruments Model 8778 Heat Stress Meter Instruction Manual
How long does the auto power off function last?
The meter automatically powers itself OFF after 20 minutes of inactivity.
From: REED Instruments Model 8778 Heat Stress Meter Instruction Manual
What is the alarm threshold range?
The alarm threshold is adjustable between 20.0°C and 37.2°C (68°F to 99.0°F).
From: Reed Instruments Model 8778 Heat Stress Meter Instruction Manual
How do I override the auto power off function?
When the meter is off, hold down the and buttons for 2 seconds to enter Non-Sleep mode.
From: Reed Instruments Model 8778 Heat Stress Meter Instruction Manual