Transducers Direct LLC TDWPG ユーザーズマニュアル
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Gas Watcher User’s Manual
Version 1.2, February 18, 2016
Notes regarding operation of pushbuttons
1. After the unit is initially turned on, the pushbuttons are disabled for 5 seconds to allow the unit
to initialize
2. The pushbuttons are ignored for about 1 second every 30 seconds to allow for the pressure
measurement and subsequent transfer of the pressure datum to the RF Code board
When the unit is turned off
Press and hold PB2 for at least one second, and the unit will turn on. Pressing PB1 has no effect when
the unit is off.
the unit is off.
When the unit is initially turned on – Programming Mode
When the unit is initially turned on, all display segments and icons will be turned on for 5 seconds. These
5 seconds will be called the “turn on delay.” After the turn on delay, the unit will begin normal
operation. During the turn on delay, programming mode can be entered by pressing and holding PB1 for
at least one second. In programming mode, the unit of measure may be changed, the low pressure
threshold may be changed, and the pressure may be zeroed. Note that programming mode can only be
entered when the unit is turned on. If the unit is operating normally and the user wants to change the
unit of measure or the low pressure threshold, he must turn the unit off and then back on. Also, when in
programming mode, the “Service” icon is turned on.
5 seconds will be called the “turn on delay.” After the turn on delay, the unit will begin normal
operation. During the turn on delay, programming mode can be entered by pressing and holding PB1 for
at least one second. In programming mode, the unit of measure may be changed, the low pressure
threshold may be changed, and the pressure may be zeroed. Note that programming mode can only be
entered when the unit is turned on. If the unit is operating normally and the user wants to change the
unit of measure or the low pressure threshold, he must turn the unit off and then back on. Also, when in
programming mode, the “Service” icon is turned on.
Unit of measurement
When programming mode is first entered, the display will read “unit,” and the icon for the current unit
of measure (psi, MPa, or bar) is turned on. The user may change the unit of measure by pressing PB2
momentarily. When done, the user may press PB1 momentarily to program the low pressure threshold.
of measure (psi, MPa, or bar) is turned on. The user may change the unit of measure by pressing PB2
momentarily. When done, the user may press PB1 momentarily to program the low pressure threshold.
Low pressure threshold
In this mode, the unit will display the current low pressure threshold, and the “Low Pressure” icon will
be turned on. The user may press PB2 momentarily to change the low pressure threshold; the values
range from 200 to 500 psi in increments of 50 psi. When user gets to 500 psi, pressing PB2 momentarily
takes the low pressure threshold back to 200 psi. When done, the user may press PB1 momentarily to
zero the pressure.
be turned on. The user may press PB2 momentarily to change the low pressure threshold; the values
range from 200 to 500 psi in increments of 50 psi. When user gets to 500 psi, pressing PB2 momentarily
takes the low pressure threshold back to 200 psi. When done, the user may press PB1 momentarily to
zero the pressure.