Extech PS101 Operating Manual
USERGUIDE
Differential Pressure Manometers
Model PS101, PS106, and PS115
Introduction
Congratulations on your purchase of the Extech PS100 Series Differential Pressure Manometer.
These manometers measure gauge pressure (a measure of pressure with reference to ambient
pressure) and differential pressure (the difference between two pressure measurements). In
addition, the meter can display a value that represents the actual reading minus a stored reference
(DIF mode).
The PS101 (±1psi), PS106 (±6 psi), and the PS115 (±15 psi) models offer 11 units of measure, a 99
reading storage utility, MAX/MIN recording with Relative mode, Time Stamp, Data Hold, Auto Power
OFF, Zero function, and large Backlit LCD. These devices are portable and battery operated and
perfect for HVAC technicians as well as those in the pneumatic and medical fields.
This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable
service. Please visit our website (www.extech.com) to check for the latest version of this User
Guide.
Safety
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must refer to the
manual for further information.
Description
Meter Description
1. Positive Pressure connector
2. Negative Pressure connector
3. Measurement reading on LCD
4. Unit selector arrow
5. Unit of measure selections
6. UNIT of measure key
7. REC - MX/MN – Return key
8. LCD Backlight
9. HOLD - up arrow ▲ key
10. DIF - down arrow ▼ key
11. MEM - RECALL key
12. Power ON-OFF
key
key
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Display Description
1. Primary Display Area
2. MAX-MIN mode active
3. Recording active
4. Data Hold active
5. Low battery voltage
6. Stored reading memory location
7. Single reading storage mode
8. Review stored data record
9. Elapsed timer
10. Unit of measure selector arrows
11. Difference mode (actual reading minus reference value)
12. Negative pressure connector
13. Positive pressure connector
Keypad Description
Power ON/OFF
Press momentarily to store a reading. The MEMO icon and the storage location number
will appear on the display with a flashing reading. Press and hold for 3 seconds to access the
Recall mode (use up and down arrow keys to navigate stored readings). Momentarily press again
to exit recall mode. To delete all records, press and hold key for 3 seconds while in Recall mode.
Press momentarily to switch ON the display backlight for approximately 10 seconds
Unit of Measure selector key. Press momentarily to step through availble units.
Press momentarily to enter Record mode. REC icon apears and the elapsed timer starts.
Press to step through MAX and MIN readings. Other keys are locked in this mode except for the
backlight and the Power key. Press and hold for 3 seconds to exit the record mode and to return
to the normal mode of operation.
Press to freeze current reading. Press again to release.
Press momentarily to store the current reading as a reference (the DIF icon will switch
ON). Subsequent readings represent the current measurement minus the reference value. Note
that this display is NOT the differential pressure between the two pressure inputs.
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