Panametrics DigitalFlow XMT868i, Service Manual

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DigitalFlow™ XMT868i Service Manual 33
Appendix C. Factory Tests
Appendix C. Factory Tests
C.6 Introduction
For user security, the XMT868i offers two special functions in a separate menu: selection of single- or dual-channel
operation, and the factory-default reset. While the first function enables you to reset the channel configurations set
during manufacturing, the reset function, by restoring the meter to its original state, allows you to purge potential
errors in program memory.
To enter the FACTORY TEST menu, press [Escape], followed in succession by the up arrow key ([

]), the right arrow
key ([

]), the down arrow key ([

]), the left arrow key ([

]), the up arrow key again (forming a loop around the
keypad), and finally the [Enter] key. The screen displays FACTORY TEST, as shown below.
C.7 Resetting the Number of Channels
To reset the number of channels displayed:
1. In the Factory Test menu, scroll to CHAN and press [Enter].
2. Scroll to the desired number of channels (1 or 2) and press [Enter].
3. The XMT868i returns to the Factory Test menu. Press [Escape] to return to parameter display.
C.8 Resetting the XMT868i to Factory Defaults
1. In the Factory Test menu, scroll to INIT and press
[
Enter].
2. The screen displays the initial string “ESKE0”. Use the left and right arrow keys to move among characters, and the
up and down arrow keys to alter each character until the string is “FRIG” plus the number of channels (that is,
FRIG1 or FRIG2). Press [Enter].
The XMT868i reinitializes with factory default settings, and displays the message, “Review meter settings.” Since the
default for the meter display is OFF, you will need to enter the Keypad Program to reset the LCD, as described below.
3. Press [Escape], [Enter], [Escape]
.
4. In the Keypad Program window, scroll to PROG and press [Enter].
5. In the PROG menu, scroll to GLOBL and press [Enter].
6. Scroll to I/O and press [Enter].Scroll to LCD and press [Enter].
7. The window now asks for the # of LCD Parameters . Scroll to the desired number (from OFF through 1-4 and KEY)
and press [Enter].
For a 1-Channel XMT868i, the data for Channel 1 is displayed automatically, and you can skip to step 9. However, for a
2-Channel meter, the channel data to be displayed must be specified at the following prompt.
8. Scroll to the desired Channel option , as listed in Table 9.
9. For each channel, select the desired Measurement Parameter , as shown in the Programming Manual.
Note: The measurement units that appear in these prompts are those selected in the GLOBL-SYSTM menu.
FACTORY TEST
CHAN
= 1 <
Table 9: Channel Options
Option Description
CH1 Channel 1
CH2 Channel 2
SUM CH1+CH2
DIF CH1-CH2
AVE (CH1+CH2)/2