Extech Instruments PT400 User Manual

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USER MANUAL

Model PT400

Programmable Timer

Additional User Manual Translations available at www.extech.com

Introduction

Thank you for selecting the Extech PT400 Programmable Timer. The PT400 is a programmable timer
that switches devices ON and OFF at user-programmed time events. It is ideal for energy saving and
home security. It also includes a countdown timer and a randomize feature.

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 and translations of
this User Manual, Product Updates, Product Registration, and Customer Support.

Features

 10 ON/OFF timer programs with 16 options for day(s) combinations
 12/24 hour mode selection
 Daylight savings time mode
 99 Hour, 59 Minute, 59 Second countdown timer
 Manual mode for overriding pre-programmed ON/OFF timer settings
 Reduces power consumption by automatically turning household appliances on and off
 Anti-theft, random mode protects your home

Safety Information

To ensure the safe operation and service of the meter, follow these instructions closely. Failure to
observe warnings can result in severe injury.

WARNINGS

WARNINGS identify hazardous conditions and actions that could cause BODILY HARM or DEATH

 Do not plug two or more timers together.
 Do not plug in an appliance whose load exceeds 15 Amps.
 Always ensure the appliance plug is fully inserted into the timer outlet.
 Remove from main power if cleaning is required. Periodically wipe the case with a damp cloth

and mild detergent; do not use abrasives or solvents.

 Do not immerse in water or any other liquid.
 Do not plug the timer into a heater or similar appliance. Never leave heaters or similar

appliances unattended during operation.

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Description

Meter Description

1. LCD

2. Reset button

3.  button

4. RND button

5. SET button

6. Countdown timer button

7. M (Manual) button

8.  button

9. Power ON/OFF indicator

10. Appliance outlet

11. Mains plug

Display Descriptions

1. AM or PM setting for Clock mode

2. ON/OFF Timer setting mode: 10

ON/OFF timers available.

3. Set: Flashes in clock setup mode

4. Clock: Appears when meter is in the

normal operating mode

5. Program: Appears while programming the ON/OFF timers

6. CD: Flashes when meter is in the Countdown timer mode

7. ON: Appears when user overrides the automatic mode by manually turning the timer ON

8. AUTO: Device will operate in program mode as setup by the user

9. OFF: Appears when user overrides the automatic mode by manually turning the timer OFF

10. Current time in hours, minutes, and seconds (HH:MM:SS)

11. R (Random mode): Timer will power ON/OFF at random intervals between 6PM and 6AM

12. Day(s) of the week: Timer can be setup in 16 combinations of day(s)

Button Descriptions

1. RESET: Clears ALL data in memory including current time and all programs

2. : Access ON/OFF Timer program mode and scroll through setup options

3. SET: Long press to set clock (day and time). Short presses to scroll through ON/OFF timer

program screens. Short press to save the selection

4. : Access the Countdown timer mode. Scroll through programming options

5. RND: Set or cancel random function

6. : Set or cancel countdown function

7. M Manual: Manually override the automatic ON/OFF timer to force the timer ON/OFF.

Operation

Initial Setup

1. Press the RESET button with a paper clip or similar object until the display goes blank. Release

the button and the PT400 will proceed to reset clock, clear all stored programs, and then display
the normal operating screen (‘CLOCK’ appears at bottom of LCD).

2. Program the clock (day and time) as described in the ‘Setting the Clock’ section.

3. Program ON/OFF Timers as described in the ‘Setting the ON/OFF Timers’ section.

4. Plug the timer into a 125VAC mains power outlet

5. When plugged in, the PT400 will begin charging the internal back-up battery. 14 hours is

required to charge battery fully but you can setup and use the device while it is charging.

Programming Note

For the programming steps below, if you allow 20 seconds between programming keystrokes, the
meter will automatically exit the programming mode and return to the normal operating screen. If
this happens, please re-enter the menu and continue programming.

Setting the Clock

1. From the normal display mode (‘CLOCK’ shown on bottom of LCD), long press the SET button.

The day of week and ‘SET’ will flash on the display.

2. Press  or  to set the day of the week.

3. Press SET until the hour digits flash.

4. Press  or  to set the hour.

5. Press SET until the minute digits flash.

6. Press  or  to set the minute.

7. Press SET to save and return to the normal operating screen.

Setting the ON and OFF Timers

You can easily set the Timer to turn ON and OFF automatically at certain days and times as detailed
below. There are ten (10) ON and ten (10) OFF timers; each timer has sixteen (16) options for
combinations of days.

1. Press  to step through the ON/OFF timer screens. The first screen is 1

ON

(first ON timer) and

the second screen is 1

OFF

(first OFF timer), etc. ‘PROGRAM’ appears on the LCD.

2. At the desired timer screen, press SET. The day of the week and the ‘SET’ icon will flash.

3. Use  or  to scroll through the day(s) of the week. Stop scrolling at the desired setting.

4. Press SET button. The hour digits will flash.

5. Press  or  button to set the hour.

6. Press SET button. The minute digits will flash.

7. Press  or  button to set the minute.

8. Press SET to save.

9. Repeat the above steps for up to ten (10) ON and OFF timers.

10. Once all ON and OFF timers have been set, use the  or  button to step out to the normal

operating mode (‘CLOCK’ displayed) or wait 20 seconds for the meter to exit.

11. The timer is now set to turn ON and OFF at the time(s) specified.