6
3. TAKING READINGS
3.1. Operation of the GK-403 Readout Box
The GK-403 can store gage readings and also apply calibration factors to convert readings to
engineering units, ie. inches or millimeters. Consult the GK-403 Instruction Manual for
additional information on Mode "G" of the Readout. The following instructions will explain
taking gage measurements using Mode "B".
Connect the Readout using the flying leads or in the case of a terminal station, with a
connector. The red and black clips are for the vibrating wire transducer, the white and green
clips are for the thermistor and the blue for the shield drain wire.
1. Turn on the Readout. Turn the display selector to position "B". Readout is in digits (see
Equation 1).
2. Turn the unit on and a reading will appear in the front display window. The last digit
may change one or two digits while reading. Press the "Store" button to record the value
displayed. If the no reading displays or the reading is unstable see section 5 for
troubleshooting suggestions. The thermistor will be read and output directly in degrees
centigrade.
3.
The unit will automatically turn itself off after approximately 2 minutes to conserve
power.
3.2 Operation of the GK-404 Readout Box
The GK404 is a palm sized readout box which displays the Vibrating wire value and the
temperature in degrees centigrade.
The GK-404 Vibrating Wire Readout arrives with a patch cord for connecting to the
vibrating wire gages. One end will consist of a 5-pin plug for connecting to the respective
socket on the bottom of the GK-404 enclosure. The other end will consist of 5 leads
terminated with alligator clips. Note the colors of the alligator clips are red, black, green,
white and blue. The colors represent the positive vibrating wire gage lead (red), negative
vibrating wire gage lead (black), positive thermistor lead (green), negative thermistor lead
(white) and transducer cable drain wire (blue). The clips should be connected to their
respectively colored leads from the vibrating wire gage cable.
Use the
POS
(Position) button to select position
B
and the
MODE
button to select
Dg
(digits).
Other functions can be selected as described in the GK404 Manual.
The GK-404 will continue to take measurements and display the readings until the OFF
button is pushed, or if enabled, when the automatic Power-Off timer shuts the GK-404 off.
The GK-404 continuously monitors the status of the (2) 1.5V AA cells, and when their
combined voltage drops to 2V, the message
Batteries Low
is displayed on the screen. A
fresh set of 1.5V AA batteries should be installed at this point.
