Bird Technologies 6156 - Manuale (Pagina 26)

Inspection
Periodic inspection is necessary at about six month inter-
vals. Inspection should include the following items.
Oil Leakage
Check for coolant leakage around the front and rear clamp-
ing bands. The level of the dielectric coolant should remain
constant under normal use. The filler plug is on the conical
reducer, behind the voltmeter block, at the lower right. To
check the dielectric coolant level:
1. Move the unit so that the filler plug is
in the up position.
2. Remove the filler plug using a 3/16
inch hex wrench.
3. Check coolant level. The coolant
should be within 1/4 inch of the inside
thread of the socket. If the coolant ap-
pears to be contaminated, replace it.
The capacity is 0.1 gal. (378.5ml).
CAUTION
The diode assembly is an ESD sensitive assembly, use proper ESD
precautions.
Crystal Diode
Occasionally lubricate the O-Ring seal on the crystal diode.
Use a nonmelting dielectric compound. Check the contact
fingers of the shield for proper contact to the voltmeter
socket. Bend slightly, make sure not to damage the center
pin of the diode.
Do not interchange the diode supplied with the unit with
those of any similar wattmeter.
+
Note: If the diode assembly is replaced the
wattmeter must be calibrated.
Resistor
Voltmeter
Assembly
Replacement
A faulty resistor voltmeter assembly must be replaced in its
entirety. No attempt should be made to repair the assembly.
To replace it, use the following procedure.
1. Remove the meter from the load.
2. Remove the filler plug and drain off
approximately two ounces of coolant.
Refer to the Oil Leakage paragraph.
14
Bird Model 6104/54/56 Termaline Wattmeter