The Transmitter; The Display; The Dc Power Fuse - Thermo Scientific SGD-O User Manual

Non-contacting density gauge for fracturing & cementing

The Transmitter

This section provides troubleshooting procedures for the SGD-O

transmitter.

The instrument sends continuous readouts to the display. If the display is

blank, the readout is dim, or the readout displays in a yellow-green color,

increase the contrast by pressing the up arrow on the transmitter keypad.

If the display consists of dark rectangles, decrease the contrast by pressing

the down arrow.

If adjusting the contrast does not correct the display problem, first verify

the power supply at the source. If this is not the problem, remove power

from the transmitter. Open the enclosure and verify that the keypad cable

is properly installed on the CPU board.

If transmitter still does not display, the CPU board may be malfunctioning.

Refer to the SGD-O installation manual for instructions on replacing

boards in the transmitter.

If you suspect a problem with the DC power fuse, power down the unit

and measure the resistance with a multimeter. If the fuse is good, the

reading will be approximately 0 ohms.

You can also look at the fuse and determine it is bad if it looks brown.

Note See

Figure

9–1. If you are using a 12 Vdc board, the fuse is at F2.



Figure 9–1. DC power fuses on the I/O relay board

SGD-O User Guide

Thermo Fisher Scientific

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