ATP Instrumentation ET-951W User manual

ET-951W User Manual
Professional Humidity & Temperature Meter
Please read this user manual thoroughly before using this unit
and keep it for future reference.

Contents
1. Safety...............................................................1
2. Introduction .....................................................2
3. Features............................................................2
4. Specifications ..................................................3
5. Meter Description............................................4
6. LCD Display Description................................5
7. Operation Instructions.....................................6
8. Notes................................................................8
9. Accessories......................................................8

1
1. Safety
Read the following safety information carefully before attempting
to operate the meter.
Use the meter only as specified in this manual; otherwise, the
protection provided by the meter may be impaired.
◆Environment conditions:
RH≤90％（Non-Condensation）
Operating Temperature: -30°C ～60°C
◆Maintenance
Repairs or servicing not covered in this manual should only be
performed by qualified personnel.
Wipe the unit with a dry soft cloth. Do not use abrasives or
solvents on this instrument.
◆Safety Symbol
Comply with EMC

2
2. Introduction
This Humidity & Temperature Meter is supplied with a high
accuracy temperature & humidity sensor, providing high accuracy,
fast response and stable readings. It is used for monitoring and
collecting data of environmental temperature and humidity.
3. Features
◆Temperature units: °C/°F
◆MAX record
◆MIN record
◆Data hold
◆Dew Point Temperature
◆Wet Bulb Temperature
◆Backlight
◆Resolution 0.1%RH, 0.1°C

3
4. Specifications
Humidity
Measuring
range
Accuracy
0～100%RH
40%～60%RH: ±2.0%
20%～40%RH;60%～80%RH: ±3.0%
0～20%RH;80%～100%RH: ±4.0%
Temp.
-35°C～100°C
-31°F～212°F
-35°C～-10°C, 70°C～100°C: ±1.0°C
-10°C～70°C : ±0.5°C
-31°F～+14°F,158°F～212°F: ±1.8°F
14°F～158°F: ±0.9°F
Dew Point
Temp.
-35°C～100°C
-31°F～212°F
25°C,40%～100%RH : ±1.0°C (±1.8°F)
Wet bulb
Temp.
0°C ～80°C
32℉～176℉
25°C,40%～100%RH；±1.0°C (±1.8℉)
Sampling
rate
2 times per second
Resolution
0.1%RH, 0.1°C
Working
Temp.
-30°C to 60°C
Power
Resource
9V battery
Dimension
(L*W*H)
185*66*33(mm)
Weight
237g

4
5. Meter Description
1. Probe connector
2. LCD Display
3. Backlight ON/OFF key
4. °C /℉temperature units key
5. MAX/UP key
6. UNITS
7. MIN/DOWN key
8. Power ON/OFF key
9. Data hold key
10. SET key
11. Temperature & Humidity sensor
12. Tripod nut
13. Battery compartment

5
6. LCD Display Description
1. Humidity unit icon
2. Humidity reading
3. Dew point temperature units icon
4. Wet bulb temperature units icon
5. Auto power off icon
6. Battery icon
7. MAX/MIN icon
8. Data hold icon
9. Temperature reading
10. Temperature unit icon

6
7. Operation Instructions
(1) Open battery cover and install a 9-volt battery in the battery
compartment.
(2) Power ON: Turn the meter on by pressing
(3) Power OFF: Turn the meter off by pressing and holding
for approx. 3 seconds
(4) MAX record: press and MAX icon will appear on the
LCD, which indicates the current maximum reading, press this
button again to exit MAX record display.
(5) MIN record: press and MIN icon will appear on the
LCD, which indicates the current minimum reading, press this
button again to exit MIN record display.
(6) In the measuring mode, press button to select
temperature units °C/°F.
(7) Auto power off icon. The meter will automatically turn off
after approx. 15 minutes of no activity.

7
(8) UNITS: Press and icon will appear on the LCD,
the meter enters into wet bulb temperature measuring mode.
Press again, icon will appear on the LCD, the
meter enters into dew point temperature mode. Press
for the third time, meter goes back to normal
temperature measuring.
(9) Hold: press and HOLD icon will appear on the LCD.
To release hold press again.
(10) Backlight ON/OFF: Turn the meter on and press
once, the backlight will be on, press again to turn off it.

8
8. Notes
(1) Repairs or servicing not covered in this manual should only be
performed by qualified personnel.
(2) Wipe the unit with a dry soft cloth. Do not use abrasives or
solvents on this instrument.
(3) Remove the battery when the meter is to be stored for long
periods of time to avoid battery leakage.
(4) Replace new batteries when the low battery icon
appears.
9. Accessories
○
1 User's manual
○
2 9V battery