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FIGURE 16: GK-404 Readout
FIGURE 17: Lemo Connector to GK-404
18:
FIGURE 18: GK-405 Readout
3.
TAKING READINGS
The Model GK-404 VW Readout is a portable, low-power, hand-held unit that is
capable of running for more than 20 hours continuously on two AA batteries. It
is designed for the readout of all
capable of displaying the reading in digits, frequency (Hz), period (µs), or
microstrain (µε). The GK-404 also displays the temperature of the transducer
(embedded thermistor) with a resolution of 0.1 °C.
3.1 OPERATING THE GK-404
1.
Attach the flying leads by aligning the red circle on the silver Lemo
connector with the red line on the top of the GK-404 (see Figure 17). Insert
the Lemo connector into the GK-404 until it locks into place.
2.
Connect each of the clips on the leads to the matching colors of the sensor
conductors, with blue representing the shield (bare).
16:
3.
To turn on the GK-404, press the On/Off button on the front panel of the
unit. The initial startup screen will display.
4.
After a delay, the GK-404 will start taking readings and display them based
on the settings of the Pos and Mode buttons.
The unit display (from left to right) is as follows:
■
17:
The current position: set by the Pos button, displayed as A through F.
■
The current reading: set by the Mode button, displayed as a numeric value
followed by the unit of measure.
■
Temperature reading of the attached instrument in degrees Celsius.
Use the Pos and Mode buttons to select the correct position and display units
for the model of equipment purchased.
The GK-404 will continue to take measurements and display readings until the
unit is turned off, either manually or by the Auto-Off timer (if enabled).
For more information, consult the GK-404 manual.
3.2 GK-405 VIBRATING WIRE READOUT
The GK-405 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.
The remote module can be wire-connected to the sensor by means of:
■
Flying leads with alligator clips if the sensor cable terminates in bare wires.
■
A 10-pin connector.
The two units communicate wirelessly using Bluetooth
communications protocol. Using Bluetooth, the unit can operate from the cradle
of the remote module, or, if more convenient, can be removed and operated up
to 20 meters away from the remote module.
The GK-405 displays the thermistor temperature in degrees Celsius.
For further details, consult the GK-405 Instruction Manual.
vibrating wire instruments, and is
GEOKON
MODEL 4800 VW EARTH PRESSURE CELLS | TAKING READINGS | 15
®
, a reliable digital
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