5
3.2. Operation of the GK404 Readout Box
The GK-404 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.
3.3. Operation of the GK405 Readout Box
The GK-405 Vibrating Wire Readout is made up of two components:
•
the Readout Unit, consisting of a Windows Mobile handheld PC running the GK-405
Vibrating Wire Readout Application
•
the GK-405 Remote Module which is housed in a weather-proof enclosure and connects
to the vibrating wire sensor by means of:
1) Flying leads with alligator type clips when the sensor cable terminates in bare wires or,
2) by means of a 10 pin connector..
The two components communicate wirelessly using Bluetooth
®
, a reliable digital
communications protocol. The Readout Unit can operate from the cradle of the Remote
Module (see Figure 2) or, if more convenient, can be removed and operated up to 20 meters
from the Remote Module
