Fluke Biomedical 07-453 - Manual (Page 7)

Section 2
General Instructions
2.1 General Instructions
Switch Settings
The front panel selector toggle switch on the Model 07-453 has 3 positions, 'OFF', 'PULSES", and
"MILLISECONDS'. The switch is OFF in the center position.
PULSES
When the switch is moved to the 'PULSES' position, the instrument will be used for measuring output
pulses from half-wave or full-wave rectified machines as well as AC line voltage pulses. Normally, each
full second of exposure will produce 60 pulses. An exposure of 2/10 second will read 12 for example.
Refer to the chart on page 5 for further illustration.
MILLISECONDS
With the switch in the 'MILLISECONDS' position, the instrument will measure the length of time that a DC
or 3-phase AC x-ray is on. The display reading will be in milliseconds i.e. an exposure of 1 second will
read 1000, an exposure of 2/10 second will read 200.
OFF
All power to the instrument is disconnected in the 'OFF' position. Set the switch to 'OFF' when not in use
to conserve battery life. The center position is OFF.
Connections
When reading directly from an x-ray head, no connections are made to the instrument. Point the x-ray
head at the "target" area of the Model 07-453 (near the lower left side of the instrument). Take an
exposure and read the time on the display in pulses or milliseconds.
Remote Sensor
To use the optional remote sensor, connect the plug at the end of the remote sensor cable in to the jack
on left side of the 07-453 case. Point the x-ray head at the target on the Remote Sensor. Stretch the
cable out and use as described above.
AC Input
Connect the two test leads to the two input jacks on the front of the instrument. Since the instrument
counts AC pulses, the AC line must be switched by the relay that is in the timer under test. A typical
wiring configuration is shown in schematic form in Figure 1. A typical wiring configuration for testing an
Electronic Control Concepts Model 8200A Timer is shown in Figure 2.
The circuit for AC inputs is completely isolated from the rest of the instrument. No damage to the
instrument will occur if the probes are reversed. However, to obtain the best accuracy, the '+' (Red)
should be connected to the high side of the line, and the black or '-' probe should be connected to the low
side of the line.
Oscilloscope Output