Instruction manual

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MODEL XMT-P pH/ORP SECTION 5.0
DISPLAY AND OPERATION
1. If a security code has been programmed, pressing MENU causes the
security screen to appear.
2. Enter the three-digit security code.
a. If a security code has been assigned to configure only, entering it will
unlock all the menus.
b. If separate security codes have been assigned to calibrate and con-
figure, entering the calibrate code will allow the user access to only
the calibrate and hold menus; entering the configuration code will
allow the user access to all menus.
3. If the entered code is correct, the main menu screen appears. If the code
is incorrect, the Invalid Code screen appears. The Enter Security Code
screen reappears after two seconds.
Enter Security
Code: 000
Invalid Code
Calibrate Hold
Program Display
Hold Outputs?
Yes No
5.6 SECURITY
5.6.1 How the Security Code Works
Use security codes to prevent accidental or unwanted changes to program settings, displays, and calibration. Two
three-digit security codes can be used to do the following…
a. Allow a user to view the default display and information screens only.
b. Allow a user access to the calibration and hold menus only.
c. Allow a user access to all the menus.
5.6.2 Bypassing the Security Code
Enter 555. The main menu will open.
5.6.3 Setting a Security Code
See Section 7.6.
5.7 USING HOLD
5.7.1 Purpose
The transmitter output is always proportional to the process variable (oxygen, free chlorine, total chlorine, mono-
chloramine, or ozone). To prevent improper operation of control systems or dosing pumps, place the transmitter in
hold before removing the sensor for maintenance. Be sure to remove the transmitter from hold once the work is
complete and the sensor has been returned to the process liquid. During hold the transmitter current goes to the
value programmed by the user. Once in hold, the transmitter remains there indefinitely. While in hold, the word
"hold" appears periodically in the display.
5.7.2 Using the Hold Function
1. Press MENU. The main menu screen appears. Choose Hold.
2. The Hold Output screen appears. Choose Yes to put the transmitter in
hold.
3. The top line in the display is the present current output. Use the arrow
keys to change the number in the second line to the desired current dur-
ing hold.
4. The main display screen appears.
5. To take the transmitter out of hole, repeat steps 1 and 2 and choose No
in step 2.
Output Range? 10.00mA
Hold at 20.00mA