6.4 MAIN BOARD POWER JUMPERS (Continued)
Refer to Figure 6-2.
S2 jumpers are for sensor break indications:
*
S2A jumper is not used
*
S2B jumper is for positive sensor break (i.e. heating)
*
S2C & S2D are not used
S3 jumpers are used for the following (refer to Table 6-1):
*
To enable or disable the front panel push-buttons
*
To allow for an extremely low resistance load for analog output
*
To disable the
MENU
button
Test pins TP1 - TP11 are for testing purposes. Do not use as reading errors
may result.
Table 6-1 Jumper Functions
Jumper
Description
S3-A
Install to enable front panel push-buttons.
Remove to disable all front panel push-buttons
S3-B
Removed. Install for factory calibration only.
S3-C
Normally removed. Install for analog voltage output
when load is less than 1 KW impedance. Care should be
taken when installing this jumper.
S3-D
Removed. Not used.
S3-E
If installed without S3-B, the
MENU
button locks out.
If you press the
MENU
button, the meter shows "LOCK".
12
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