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TelePole WR/ Operating & Maintenance Manual Page 20

The CPU unit counts the input pulses, calculates dead time, averages the results, and displays

the reading.

To check the CPU unit "calibration" perform the following procedure:

5.3.1. Disconnect the detector telephone connector from the meter.

5.3.2. Adjust the pulser output to obtain a 5 Volts amplitude and 10

µµ

sec width pulse.

5.3.3. Connect the pulser output as follows: (+) to pin 1 and (-) to pin 2.

Option: A more convenient and easier way to perform this step is by using the TelePole

Pulser Adapter. Proceed as follows:

- Connect the adapter telephone cable to the detector connector (Det.) on the TelePole.

- Connect the pulser signal output to pin 4 on the adapter board.

- Connect the pulser ground output to pin 3 on the adapter board.

5.3.4. First, turn the meter on, and then turn the pulser on. Ensure to obtain the base unit

reading (±10%) according to the following table:

Tab1e 1 - Low Range Geiger

Input Frequency <Hz>

Display <mR/h>

17 1.00

170 10.0

2000 141

4000 365

5000 534

6000 730

6300

804*

* Switch to high range geiger

Table 2 - High Range Geiger

Input Frequency <Hz>

Display <R/h>

300 1.00

3200 10.7

10.000 39.2

30.000 183

40.000 323

50.000 525

60.000 839

75.000 O.F. (overflow)

These results are valid only when all factors equal to 1.

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MGP WRM2 Spezifikationen Seite 20