Ametek PST-2000 Manual - Página 11

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Compare the value showing on the Resistance Out switches to the values in the

Resistance Out Range column in Table 2.

If the switch value does not fall within the range in the Resistance Out

Range column, or if the gauge does not function as described, replace it.

b. If the gauge is functioning properly, refer to AMETEK Dixson Product In-

formation Note 072-40286 (Troubleshooting Fuel Gauges) for trouble-

shooting tips.

Table 2

Resistance Out Values

The following example will help you understand this procedure:

The scale plate on a suspect temperature gauge reads from 100 to 300 degrees Fahrenheit.

You connect the PST-2000 to the gauge and configure the Resistance Out switches to posi-

tion the pointer to 200 degrees after tapping the gauge. If the gauge is accurate, the value

showing on the Resistance Out switches will be between 103 and 119 ohms as shown in

Table 2.

11 Ammeter

Unplug the gauge to be tested and connect the PST-2000 as described in Figure 2.

Turn the PST-2000 Input Voltage switch to either 12 volts or 24 volts, whatever is

appropriate for your vehicle.

Turn the ignition on.

If the green Battery Voltage LED is on, continue this procedure.

b. If one of the red LEDs is on, the Input Voltage switch may not be set to

the vehicle's battery voltage, or the battery voltage is too high or too low.

072-40236-B

Using the PST-2000 with Freightliner Trucks

Scale Plate

Gauge Test

Type

Points

100 to 350° F

150°

300°

100 to 300° F

200°

250°

100 to 260° F

140°

200°

100 to 250° F

150°

200°

Fuel Level

Full (F)

Empty (E)

Resistance Out

Range

170 to 186 ohms

34 to 50 ohms

103 to 119 ohms

59 to 75 ohms

220 to 236 ohms

80 to 96 ohms

188 to 204 ohms

79 to 95 ohms

26 to 40 ohms

220 to 260 ohms

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