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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".
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