© 2020 Radiodetection Ltd
19
5 Press the
key to exit the menu
4.19 Maximum Voltage
On high impedance applications such as small diameter
cables, tracer wires, etc, sometimes it can be difficult to
get a signal to flow when using the direct connection
method. Increasing the output voltage of the transmitter
can maximize the amount of signal coupled onto the
utility.
The transmitter can operate in either low voltage (30V)
or in high voltage (90V). In normal operating mode the
transmitter will operate in low voltage mode.
Warning: When operating the transmitter in high voltage
mode, always make sure that the transmitter is switched off
when connecting or disconnecting direct connection leads.
To set maximum output voltage to 90 volts:
1. Press the
key to enter the menu
2. Scroll to the
MAXV
menu using the
or
keys
3. Press the key to enter the MAXV menu
4. Set the MAXV to HIGH using the
or
keys
5. Press the
key to accept your changes and exit
the MAXV menu
6. Press the
key to exit the menu
When in high voltage mode the transmitter will display a
high voltage warning triangle.
Each time the transmitter is switched off the transmitter
will revert back to the default low voltage setting.
4.20 Measure mode
The transmitter has the capability of providing
impedance measurements by determining the resultant
impedance across the crocodile clips of the Direct
Connection lead while connected to the utility. These
measurements can be useful when assessing sheath
fault severity. It is also possible to measure potential
voltage that may be present on utilities to warn of
potentially dangerous or harmful voltages present.
In measure mode the measurement is derived from an
AC signal applied to the utility from the transmitter
Impedance & voltage measurements
1. Connect the Direct Connection leads to the utility
and switch on the transmitter.
2. Hold down the
key until
MEAS
is displayed and
the measuring icon is activated.
The transmitter display will now indicate the voltage
level measured across the connection leads.
3. Press the
key once and the display will indicate
the impedance measured across the connection
leads.
The measurement icon will display the following
symbols:
Figure 4.13 Impedance and voltage measurements
4. To exit
MEAS
mode hold down the key until the
display reverts back to the normal operating screen.
Impedance measurements using active
frequency
1. Connect the Direct Connection lead to the utility and
switch on the transmitter.
2. Select the preferred frequency and output the signal.
3. Press the
key once and the display will indicate
the impedance measured across the connection
leads and also the output power of the transmitter.
4. Press the
key once to return to the normal
operating screen.
4.21 CALSafe
™
Usage logging equipped RD8200 locators can be set to
disable them once they are beyond the expected service
/ calibration date.
When the unit is within 30 days of the service due date
the unit will display at startup the number of days left.
The locator will stop functioning on the service due date.
CALSafe
™ is disabled by default. You can edit the
CALSafe service due date, and enable or disable the
function using the RD Manager Online PC software
package. Refer to the RD Manager Online operation
manual for further information.
4.22 Usage-Logging
RD8200G logging and GPS locator feature a powerful
data
logging system which records all the instrument’s
critical parameters (including GPS position, if available)
and warnings in its internal memory each second.
The automatic logging system is always active and
cannot be disabled. Its memory is capable of storing at
least 500 days of normal usage data
– based on 8 hours
operation per day. Logs can be retrieved using the RD
Manager Online PC application for usage analysis and
survey validation. Refer to the RD Manager Online
operation manual for further information.
