Prostat PHT-771 Bedienungsanleitung
User Manual
PHT-771
DIGITAL PSYCHROMETER
Page
I. General Operaon 4
II. Display Descripon 5
III. Taking Measurements 5
IV. Wet Bulb and Dew Point measurements (no Second Sensor) 6
VWet Bulb and Dew Point measurements (with Second Sensor) 6
VI. Minimum (MIN) Maximum (MAX) Funcon 6
VII. Data Hold Funcon 7
VIII. Automac Power O Feature 7
IX. Lo Baery Indicator 8
X. Error Messages 8
XI. Maintenance 8
General Specicaons 10
Copyright © 2011 by Prostat® Corporaon. All rights reserved. Printed in the United States of America. No part of this
manual may be used or reproduced in any manner whatsoever without wrien permission. For informaon contact
Prostat Corporaon, 1072 Tower Lane, Bensenville, IL 60106 USA
Prostat is the registered trademark of Prostat® Corporaon
Meter Descripon
1.
Humidity Sensor & Air Temperature Sensor
2.
Triple LCD Display
3.
ON/OFF buon
4.
T1-T2/Dew Point/T1 buon
5.
°F/°C select
6.
MIN/MAX/RESET buon
7.
T2-DP/Wet Bulb/T2 buon
8.
HOLD buon
9.
T2 Probe Jack
A. Gently turn the sensor cover towards the “Open” posion unl it stops. (Do not try to remove the
cover)
B. Turn the PHT-771 on by pressing the Red ON/OFF Buon.
1. Press and hold the ON/OFF Buon approximately one second. Unit will perform a short self-
test when turned on. The unit is ready to funcon when the humidity and temperature is
indicated, allow 60 - 80 seconds for the unit to take a reading.
2. Do not press hard.
C. Press and hold the
°
C/
°
F key for approximately 2 seconds to convert the reading to the desired
Cengrade/Fahrenheit scale.
1. Temperature, Relave Humidity and Wet Bulb will display simultaneously, or Relave Humidity,
Dew Point and Wet Bulb will display simultaneously by pressing .
D. Condensaon will not aect the meters accuracy.
E. Press the ON/OFF buon briey to turn the unit OFF
F. Gently turn the sensor cover towards the “Close” posion unl it stops when the unit is not in use
or for storing unit.
4Rev. C / October 2011
PHT-771 Digital Psychrometer
1.
Relave Humidity %
2.
T1
3.
T1-T2
4.
Dew Point
5.
Wet Bulb
6.
T2-Dew Point
7.
°C/°F
8.
T2
9.
Maximum
10.
Minimum
11.
Low Baery/Hold
The PHT-771 may be used with an oponal second sensor (not provided).
For general temperature, humidity, wet bulb and dew point measurements
a second sensor is not necessary.
A. Turn the unit ON and hold the probe in the area to be
tested.
B. Allow approximately 60 to 80 seconds for readings to stabi-
lize.
C. The Relave Humidity measurement appears in the top
display.
D. Pressing the buon toggles the lower le display between DP (Dew Point) and T1 (Ambient
Temperature).
E. Wet Bulb (Wb) is displayed in lower right display.
F. If second sensor is installed, pressing the buon toggles the lower right display between
T2-DP (external temperature-Dew Point), WB (Wet Bulb), and T2 (external temperature).
5
Rev. C / October 2011
PHT-771 Digital Psychrometer
If an external probe is not connected, T1-T2, T2-DP,
and T2 measurements will not be displayed.
A. The PHT-771 default is to display Wet Bulb Wb in the lower right display. Wb is displayed in
°
C or
°
F. The Wet Bulb measurement is an indicaon of evaporave cooling and will be lower (cooler)
than the ambient Temperature T1 measurement.
B. To read the Dew Point measurement, press the buon in unl the symbol DP appears in
the lower le display. DP is displayed in
°
C or
°
F. The Dew Point measurement is an indicaon of
the temperature at which moisture in the air will condense.
A. To read the Wet Bulb measurement, press the buon unl the symbol Wb appears in the
lower right display. Wet Bulb temperature is now displayed in
°
C or
°
F.
An external probe must be connected to acvate the buon.
B. To read the Dew Point measurement, press the buon in unl the symbol appears in the
lower le display. is displayed in
°
C or
°
F.
A. The MIN/MAX mode allows the user to view only the lowest () or highest () readings.
B. Press the buon once and MIN appears on the display. The display is now showing the low-
est humidity and temperature reading in memory.
1. If is in Dew Point mode, the MIN Dew Point () will be displayed.
2. If is in Temperature mode, the MIN Temp. () will be displayed.
3. The minimum Wet Bulb (Wb) will be displayed.
C. Press the buon again and MAX appears on the display. The display is now showing the
maximum humidity and temperature readings in memory.
6Rev. C / October 2011
PHT-771 Digital Psychrometer
1. If is in Dew Point mode, the MAX Dew Point (DP) will be displayed
2. If is in the Temperature mode, the MAX Temp. (T1) will be displayed.
3. The maximum Wet Bulb (Wb) will be displayed.
D. To exit the MIN/MAX mode, press the buon again and the MIN and MAX icons disappear.
E. To clear the current min/max readings in memory, press and hold the buon for more than
two seconds.
A. Press the HOLD buon momentarily to freeze the displayed reading.
1. The current reading is now being held and will not change unl Hold (HLD) funcon is can-
celed.
2. To cancel the Hold ) funcon, press the buon momentarily
B. The ‘’ icon will appear on the upper right-hand side of the display.
C. Press the buon again to return to normal operaon.
A. The meter automacally shuts o aer a programmed period of me
B. The default me is 10 minutes.
C. To modify the Automac Power O ming period:
1. Press the HOLD buon while turning the meter ON using the ON/OFF buon.
2. Connue to hold down both HOLD and ON/OFF buons and the meter will cycle through the
selectable power-o mes: n, 2, 5, 10, 20, 40 or 60 minutes. “n” disables the auto power o
funcon.
3. When the desired power-o me appears in the display, release both buons to select the
displayed me.
4. When both HOLD and ON/OFF buons are released, the unit returns to normal operaon.
7
Rev. C / October 2011
PHT-771 Digital Psychrometer
A. When the baery power falls low, the symbol will appear on
the LCD
B. Replace the two (2) 1.5 ‘AAA’ baeries by removing the rear bat-
tery compartment cover and accessing the baery compartment.
C. Observe polarity when placing the baeries in the compartment.
D. Ensure that the compartment cover is securely fastened when
nished.
Remember Low Baeries will tend to give inaccurate readings.
Make sure you have good baeries at all mes.
DO NOT IMMERSE PROBE INTO LIQUIDS. IMMERSING
IN LIQUIDS WILL CAUSE PERMANENT DAMAGE TO
THE SENSOR!
An error message will appear on the display if the meter fails an internal diagnosc test.
A. ER1: Relave Humidity failure. Repair/replacement is necessary.
B. ER2: Internal temperature failure. Repair/replacement necessary.
C. ER3: Reference resistance failure. Repair/replacement necessary.
D. ER4: Internal temperature is out of range.
E. ER5: External temperature is out of range.
A. The meter should be cleaned with a damp cloth and mild detergent when necessary. Do not use
solvents or abrasives.
B. Store the meter in an area with moderate temperature and humidity (refer to the operang and
storage range in the specicaons chart).
8Rev. C / October 2011
PHT-771 Digital Psychrometer
9
Rev. C / October 2011
PHT-771 Digital Psychrometer
Function Range and Resolution Accuracy
Humidity 0.0 to 100.0% RH ±3% RH (10 to 90%) @ 23
°
C
Temperature (internal) -4.0 to 122.0
°
F (-20 to 50
°
C) ±1.8
°
F (±1
°
C)
Temperature (external) -4.0 to 158.0
°
F (-20 to 70
°
C) ±1.8
°
F (±1
°
C)
Display: Triple LCD
Sensor Type: Humidity: Precision capacitance sensor
Temperature: Thermistor
Response Time: 60 seconds typical
Dew Point: -90.4 to 122.0
°
F (-68 to 50
°
C) (calculated from RH and Air temperature
measurements)
Wet Bulb: -6.88 to 122.0
°
F (-21.6 to 50
°
C) (calculated from RH and Air temperature
measurements)
Operang Condions: -4 to 122
°
F (-20 to 50
°
C); < 99% RH non-condensing
Storage Condions: -40 to 185
°
F (-40 to 85
°
C); <99% RH non-condensing
Power Supply: 2 x 1.5V ‘AAA’ baeries
Baery Life: Approx. 80 hours
Dimensions / Weight: 7 x 1.9 x 1” (178.5 x 48.8 x 25.2mm); 4.9 oz. (140g)
10 Rev. C / October 2011
PHT-771 Digital Psychrometer
Inhaltsverzeichnis
Andere Prostat Messgerät Handbücher
Prostat
Prostat ESD check ESI-870 Bedienungsanleitung
Prostat
Prostat CVM-780 Bedienungsanleitung
Prostat
Prostat PRS-812 Bedienungsanleitung
Prostat
Prostat PRS-812 Bedienungsanleitung
Prostat
Prostat PRF-912B Bedienungsanleitung
Prostat
Prostat PFK-100 Bedienungsanleitung
Prostat
Prostat PRS-812 Bedienungsanleitung
Prostat
Prostat SureTest PGT-61-154 Bedienungsanleitung
Prostat
Prostat PAS-853B Bedienungsanleitung
Prostat
Prostat PFM-711A Bedienungsanleitung
Prostat
Prostat PGA-710B Bedienungsanleitung
Prostat
Prostat PAN-750 Bedienungsanleitung
Prostat
Prostat PFA-860 Bedienungsanleitung
Prostat
Prostat PFK-100 Bedienungsanleitung
Prostat
Prostat CVM-780 Bedienungsanleitung
Prostat
Prostat SureTest PGT-61-164 Bedienungsanleitung
Prostat
Prostat PGA-710 Bedienungsanleitung
Prostat
Prostat PWA-805 Bedienungsanleitung
Prostat
Prostat PAS-853B Bedienungsanleitung
Prostat
Prostat PFM-711B Bedienungsanleitung
